{"id":3737,"date":"2026-03-19T14:32:17","date_gmt":"2026-03-19T06:32:17","guid":{"rendered":"https:\/\/www.nonmetallic-ore.com\/?p=3737"},"modified":"2026-03-19T14:32:58","modified_gmt":"2026-03-19T06:32:58","slug":"calcium-carbonate-surface-modification-with-a-pin-mill-process-parameters-and-what-the-numbers-mean","status":"publish","type":"post","link":"https:\/\/www.nonmetallic-ore.com\/vi\/calcium-carbonate-surface-modification-with-a-pin-mill-process-parameters-and-what-the-numbers-mean\/","title":{"rendered":"Bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t canxi cacbonat b\u1eb1ng m\u00e1y nghi\u1ec1n tr\u1ee5c: Quy tr\u00ecnh, th\u00f4ng s\u1ed1 v\u00e0 \u00fd ngh\u0129a c\u1ee7a c\u00e1c con s\u1ed1"},"content":{"rendered":"

Canxi cacbonat ch\u01b0a bi\u1ebfn t\u00ednh c\u00f3 b\u1ec1 m\u1eb7t \u01b0a n\u01b0\u1edbc. Nh\u1ef1a, cao su v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u00e1p th\u00ec k\u1ef5 n\u01b0\u1edbc. Khi cho ch\u1ea5t \u0111\u1ed9n CaCO3 ch\u01b0a bi\u1ebfn t\u00ednh v\u00e0o ma tr\u1eadn polyme, hai v\u1eadt li\u1ec7u n\u00e0y s\u1ebd ch\u1ed1ng l\u1ea1i nhau: ph\u00e2n t\u00e1n k\u00e9m, \u0111\u1ed9 b\u1ec1n k\u00e9o gi\u1ea3m, \u0111\u1ed9 b\u00e1m d\u00ednh gi\u1eefa ch\u1ea5t \u0111\u1ed9n v\u00e0 ma tr\u1eadn y\u1ebfu. H\u1ee3p ch\u1ea5t n\u00e0y ho\u1ea1t \u0111\u1ed9ng k\u00e9m h\u01a1n polyme kh\u00f4ng ch\u1ee9a ch\u1ea5t \u0111\u1ed9n \u1edf m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t quan tr\u1ecdng.<\/p>\n\n\n\n

Vi\u1ec7c bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t b\u1eb1ng axit b\u00e9o chuy\u1ec3n \u0111\u1ed5i b\u1ec1 m\u1eb7t canxi cacbonat t\u1eeb \u01b0a n\u01b0\u1edbc sang k\u1ef5 n\u01b0\u1edbc. Axit stearic l\u00e0 lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. M\u1ed9t l\u1edbp \u0111\u01a1n ph\u00e2n t\u1eed axit stearic li\u00ean k\u1ebft v\u1edbi b\u1ec1 m\u1eb7t, t\u1ea1o th\u00e0nh \u0111u\u00f4i hydrocarbon t\u01b0\u01a1ng th\u00edch v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc v\u1edbi ma tr\u1eadn polymer. K\u1ebft qu\u1ea3 l\u00e0 s\u1ef1 ph\u00e2n t\u00e1n t\u1ed1t h\u01a1n, t\u1ea3i tr\u1ecdng ch\u1ea5t \u0111\u1ed9n cao h\u01a1n. N\u00f3 c\u1ea3i thi\u1ec7n c\u00e1c t\u00ednh ch\u1ea5t k\u00e9o v\u00e0 va \u0111\u1eadp, v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 nh\u1edbt c\u1ee7a h\u1ed7n h\u1ee3p \u1edf c\u00f9ng m\u1ed9t t\u1ea3i tr\u1ecdng.<\/p>\n\n\n\n

M\u00e1y nghi\u1ec1n tr\u1ee5c v\u00edt l\u00e0 c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh ph\u1ee7 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u1edf quy m\u00f4 li\u00ean t\u1ee5c. N\u00f3 t\u1ea1o ra nhi\u1ec7t \u0111\u1ed9 v\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m tan ch\u1ea3y, ph\u00e2n t\u00e1n v\u00e0 li\u00ean k\u1ebft ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh v\u1edbi b\u1ec1 m\u1eb7t kho\u00e1ng ch\u1ea5t ch\u1ec9 trong m\u1ed9t l\u1ea7n nghi\u1ec1n. Kh\u00f4ng c\u1ea7n ngu\u1ed3n nhi\u1ec7t b\u00ean ngo\u00e0i, kh\u00f4ng c\u1ea7n x\u1eed l\u00fd theo m\u1ebb, v\u00e0 kh\u00f4ng g\u1eb7p c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7 m\u00e0 m\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao t\u1ea1o ra khi s\u1ef1 ph\u00e2n b\u1ed1 ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh ch\u00ednh \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t v\u00e0 c\u00e1ch x\u00e1c minh r\u1eb1ng qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n

\"Canxi
Canxi cacbonat<\/figcaption><\/figure>\n\n\n\n

T\u1ea1i sao b\u1ec1 m\u1eb7t canxi cacbonat c\u1ea7n ph\u1ea3i thay \u0111\u1ed5i<\/h2>\n\n\n\n

Canxit (d\u1ea1ng kho\u00e1ng ch\u1ea5t c\u1ee7a canxi cacbonat) c\u00f3 b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c bao ph\u1ee7 b\u1edfi c\u00e1c ion canxi v\u00e0 cacbonat d\u1ec5 d\u00e0ng t\u1ea1o li\u00ean k\u1ebft hydro v\u1edbi c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc. \u0110\u00e2y l\u00e0 \u0111i\u1ec1u l\u00e0m cho CaCO3 ch\u01b0a bi\u1ebfn \u0111\u1ed5i c\u00f3 t\u00ednh \u01b0a n\u01b0\u1edbc: n\u00f3 \u01b0a n\u01b0\u1edbc h\u01a1n d\u1ea7u, v\u00e0 \u01b0a n\u01b0\u1edbc h\u01a1n c\u00e1c chu\u1ed7i polymer. Trong h\u1ee3p ch\u1ea5t nh\u1ef1a, s\u1ef1 \u01b0a th\u00edch n\u00e0y th\u1ec3 hi\u1ec7n \u1edf kh\u1ea3 n\u0103ng th\u1ea5m \u01b0\u1edbt k\u00e9m b\u1edfi polymer n\u00f3ng ch\u1ea3y. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 b\u1ec1 m\u1eb7t ch\u1ea5t \u0111\u1ed9n kh\u00f4ng \u0111\u01b0\u1ee3c bao ph\u1ee7 ho\u00e0n to\u00e0n b\u1edfi ma tr\u1eadn, t\u1ea1o ra c\u00e1c giao di\u1ec7n y\u1ebfu.<\/p>\n\n\n\n

\u1ede h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t \u0111\u1ed9n th\u1ea5p \u2014 d\u01b0\u1edbi kho\u1ea3ng 15% theo tr\u1ecdng l\u01b0\u1ee3ng \u2014 v\u1ea5n \u0111\u1ec1 v\u1eabn c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c. Polyme c\u00f3 \u0111\u1ee7 pha li\u00ean t\u1ee5c \u0111\u1ec3 ph\u1ea7n n\u00e0o kh\u1eafc ph\u1ee5c c\u00e1c li\u00ean k\u1ebft y\u1ebfu. Tr\u00ean h\u00e0m l\u01b0\u1ee3ng 20-30%, m\u1ee9c m\u00e0 hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u1ee7a CaCO3 nh\u01b0 m\u1ed9t ch\u1ea5t \u0111\u1ed9n b\u1eaft \u0111\u1ea7u tr\u1edf n\u00ean c\u00f3 \u00fd ngh\u0129a, c\u00e1c li\u00ean k\u1ebft y\u1ebfu tr\u1edf n\u00ean tr\u1ea7m tr\u1ecdng h\u01a1n v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a h\u1ed7n h\u1ee3p gi\u1ea3m \u0111\u00e1ng k\u1ec3 so v\u1edbi d\u1ef1 \u0111o\u00e1n \u1edf m\u1ee9c h\u00e0m l\u01b0\u1ee3ng n\u00e0y. \u0110\u1ed9 b\u1ec1n k\u00e9o gi\u1ea3m. Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp gi\u1ea3m. Ch\u1ea5t \u0111\u1ed9n c\u00f3 m\u1eb7t nh\u01b0ng kh\u00f4ng \u0111\u00f3ng g\u00f3p g\u00ec.<\/p>\n\n\n\n

Vi\u1ec7c bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t b\u1eb1ng axit stearic (ho\u1eb7c c\u00e1c axit b\u00e9o kh\u00e1c) ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng ph\u1ea3n \u1ee9ng gi\u1eefa nh\u00f3m carboxyl (\u2013COOH) c\u1ee7a axit v\u00e0 c\u00e1c ion canxi tr\u00ean b\u1ec1 m\u1eb7t CaCO3. Canxi thay th\u1ebf hydro. Canxi stearat h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t, v\u1edbi \u0111u\u00f4i hydrocarbon d\u00e0i c\u1ee7a stearat h\u01b0\u1edbng ra ngo\u00e0i. \u0110u\u00f4i hydrocarbon \u0111\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c chu\u1ed7i polymer polyolefin v\u00e0 PVC. Ch\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau th\u00f4ng qua l\u1ef1c van der Waals theo c\u00f9ng m\u1ed9t c\u00e1ch m\u00e0 c\u00e1c chu\u1ed7i polymer t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. B\u1ec1 m\u1eb7t ch\u1ea5t \u0111\u1ed9n l\u00fac n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a ma tr\u1eadn polymer, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u01b0 m\u1ed9t v\u1eadt th\u1ec3 l\u1ea1 trong \u0111\u00f3.<\/p>\n\n\n\n

B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh m\u00e1y phay ch\u1ed1t l\u00e0 g\u00ec v\u00e0 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n\n\n\n
\"c\u1ed1i
M\u00e1y nghi\u1ec1n ghim<\/figcaption><\/figure>\n\n\n\n

M\u00e1y nghi\u1ec1n tr\u1ee5c v\u00edt c\u00f3 c\u1ea5u t\u1ea1o g\u1ed3m hai \u0111\u0129a \u0111\u01b0\u1ee3c g\u1eafn tr\u00ean m\u1ed9t tr\u1ee5c ngang, m\u1ed7i \u0111\u0129a \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c h\u00e0ng tr\u1ee5c v\u00edt b\u1ed1 tr\u00ed th\u00e0nh c\u00e1c v\u00f2ng tr\u00f2n \u0111\u1ed3ng t\u00e2m. C\u00e1c \u0111\u0129a quay ng\u01b0\u1ee3c chi\u1ec1u nhau \u2014 quay ng\u01b0\u1ee3c chi\u1ec1u \u2014 v\u1edbi t\u1ed1c \u0111\u1ed9 t\u1ea1o ra v\u1eadn t\u1ed1c tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i t\u1ea1i v\u00f2ng tr\u1ee5c v\u00edt ngo\u00e0i c\u00f9ng l\u00e0 200-250 m\/s. V\u1eadt li\u1ec7u c\u1ea5p li\u1ec7u v\u00e0 ch\u1ea5t ph\u1ee5 gia \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o t\u1eeb t\u00e2m v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1ea9y ra ngo\u00e0i qua c\u00e1c v\u00f2ng tr\u1ee5c v\u00edt li\u00ean ti\u1ebfp tr\u01b0\u1edbc khi tho\u00e1t ra \u1edf ngo\u1ea1i vi.<\/p>\n\n\n\n

Ba \u0111i\u1ec1u x\u1ea3y ra \u0111\u1ed3ng th\u1eddi trong nh\u1eefng mili gi\u00e2y ng\u1eafn ng\u1ee7i khi kim \u0111i qua tr\u01b0\u1eddng t\u1eeb.<\/p>\n\n\n\n

S\u1ef1 ph\u00e2n t\u00e1n<\/h3>\n\n\n\n

V\u00f2ng ch\u1ed1t \u0111\u1ea7u ti\u00ean ti\u1ebfp x\u00fac v\u1edbi nguy\u00ean li\u1ec7u l\u00e0 h\u1ed7n h\u1ee3p c\u00e1c h\u1ea1t canxi cacbonat v\u00e0 c\u00e1c h\u1ea1t ho\u1eb7c b\u1ed9t axit stearic r\u1eafn. L\u1ef1c va \u0111\u1eadp \u1edf t\u1ed1c \u0111\u1ed9 h\u01a1n 200 m\/s s\u1ebd ph\u00e1 v\u1ee1 m\u1ecdi kh\u1ed1i k\u1ebft t\u1ee5 ngay l\u1eadp t\u1ee9c. \u0110\u1ebfn v\u00f2ng ch\u1ed1t th\u1ee9 hai ho\u1eb7c th\u1ee9 ba, v\u1eadt li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch ho\u00e0n to\u00e0n. M\u1ed7i h\u1ea1t CaCO3 \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u1ed9 ra v\u00e0 t\u00e1ch bi\u1ec7t, \u0111\u01b0\u1ee3c bao quanh b\u1edfi c\u00e1c h\u1ea1t ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh ph\u00e2n t\u00e1n. Kh\u00f4ng c\u00f3 m\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c m\u00e1y tr\u1ed9n c\u00e1nh khu\u1ea5y n\u00e0o \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 ph\u00e2n t\u00e1n n\u00e0y trong ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c.<\/p>\n\n\n\n

S\u01b0\u1edfi \u1ea5m do ma s\u00e1t<\/h3>\n\n\n\n

\u0110\u1ed9ng n\u0103ng c\u1ee7a c\u00e1c va ch\u1ea1m gi\u1eefa c\u00e1c ch\u1ed1t nghi\u1ec1n chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng. Trong m\u1ed9t m\u00e1y nghi\u1ec1n ch\u1ed1t \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh t\u1ed1t, s\u1eed d\u1ee5ng canxi cacbonat v\u1edbi n\u0103ng su\u1ea5t s\u1ea3n xu\u1ea5t th\u00f4ng th\u01b0\u1eddng, nhi\u1ec7t \u0111\u1ed9 v\u1eadt li\u1ec7u t\u0103ng t\u1eeb nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng l\u00ean 120-130\u00b0C trong ch\u01b0a \u0111\u1ea7y m\u1ed9t gi\u00e2y. Axit stearic n\u00f3ng ch\u1ea3y \u1edf 69,6\u00b0C; axit palmitic \u1edf 63\u00b0C. C\u00e1c axit b\u00e9o h\u1ed7n h\u1ee3p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng nghi\u1ec7p n\u00f3ng ch\u1ea3y \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 55-75\u00b0C. Khi v\u1eadt li\u1ec7u \u0111\u1ebfn c\u00e1c v\u00f2ng ch\u1ed1t gi\u1eefa, ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh \u0111\u00e3 n\u00f3ng ch\u1ea3y v\u00e0 \u1edf d\u1ea1ng l\u1ecfng \u2014 c\u00f3 th\u1ec3 l\u00e0m \u01b0\u1edbt b\u1ec1 m\u1eb7t kho\u00e1ng ch\u1ea5t.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 \u01b0u \u0111i\u1ec3m then ch\u1ed1t so v\u1edbi c\u00e1c m\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao s\u1eed d\u1ee5ng \u00e1o gia nhi\u1ec7t b\u00ean ngo\u00e0i. \u00c1o gia nhi\u1ec7t l\u00e0m n\u00f3ng v\u1eadt li\u1ec7u t\u1eeb th\u00e0nh ngo\u00e0i v\u00e0o trong. V\u1eadt li\u1ec7u g\u1ea7n th\u00e0nh n\u00f3ng h\u01a1n v\u1eadt li\u1ec7u \u1edf trung t\u00e2m. Trong m\u00e1y tr\u1ed9n theo m\u1ebb x\u1eed l\u00fd v\u00e0i tr\u0103m kg, \u0111\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 trong m\u1ebb khi gia nhi\u1ec7t c\u00f3 th\u1ec3 l\u00ean t\u1edbi 20-30\u00b0C. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t ph\u1ea7n v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c ph\u1ee7 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u00edch h\u1ee3p trong khi ph\u1ea7n kh\u00e1c l\u1ea1i \u1edf d\u01b0\u1edbi \u0111i\u1ec3m n\u00f3ng ch\u1ea3y c\u1ee7a ch\u1ea5t ph\u1ee5 gia. Trong m\u00e1y nghi\u1ec1n tr\u1ee5c l\u0103n, m\u1ed7i h\u1ea1t \u0111\u1ec1u \u0111i qua c\u00f9ng m\u1ed9t tr\u01b0\u1eddng tr\u1ee5c l\u0103n n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 ch\u1ecbu c\u00f9ng m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t ma s\u00e1t. \u0110\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u nhi\u1ec7t \u0111\u1ed9 tr\u00ean to\u00e0n b\u1ed9 s\u1ea3n ph\u1ea9m t\u1ed1t h\u01a1n nhi\u1ec1u.<\/p>\n\n\n\n

Li\u00ean k\u1ebft c\u01a1 h\u00f3a h\u1ecdc<\/h3>\n\n\n\n

V\u1edbi ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh \u1edf d\u1ea1ng l\u1ecfng v\u00e0 ph\u00e2n t\u00e1n ho\u00e0n to\u00e0n xung quanh c\u00e1c h\u1ea1t CaCO3 ri\u00eang l\u1ebb, n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u1eeb c\u00e1c va ch\u1ea1m c\u00f2n l\u1ea1i c\u1ee7a kim th\u00fac \u0111\u1ea9y ph\u1ea3n \u1ee9ng canxi stearat. Ph\u1ea3n \u1ee9ng gi\u1eefa nh\u00f3m carboxyl v\u00e0 ion canxi tr\u00ean b\u1ec1 m\u1eb7t l\u00e0 thu\u1eadn l\u1ee3i v\u1ec1 m\u1eb7t nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc \u1edf 120\u00b0C. Tuy nhi\u00ean, s\u1ef1 k\u00edch ho\u1ea1t c\u01a1 h\u1ecdc t\u1eeb va ch\u1ea1m c\u1ee7a kim l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng. \u0110\u00e2y l\u00e0 kh\u00eda c\u1ea1nh c\u01a1 h\u00f3a h\u1ecdc. K\u1ebft qu\u1ea3 l\u00e0 s\u1ef1 h\u00ecnh th\u00e0nh li\u00ean k\u1ebft c\u1ed9ng h\u00f3a tr\u1ecb ho\u1eb7c ion gi\u1eefa ph\u00e2n t\u1eed ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh v\u00e0 b\u1ec1 m\u1eb7t h\u1ea1t, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 s\u1ef1 h\u1ea5p ph\u1ee5 v\u1eadt l\u00fd.<\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh h\u1ea5p ph\u1ee5 v\u1eadt l\u00fd c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c: l\u1edbp ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh c\u00f3 th\u1ec3 b\u1ecb thay th\u1ebf b\u1edfi n\u01b0\u1edbc ho\u1eb7c b\u1edfi l\u1ef1c c\u1eaft c\u01a1 h\u1ecdc trong qu\u00e1 tr\u00ecnh gia c\u00f4ng. L\u1edbp ph\u1ee7 li\u00ean k\u1ebft h\u00f3a h\u1ecdc b\u1ec1n h\u01a1n nhi\u1ec1u. N\u00f3 ch\u1ecbu \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh tr\u1ed9n, \u00e9p \u0111\u00f9n v\u00e0 chu k\u1ef3 nhi\u1ec7t m\u00e0 s\u1ea3n ph\u1ea9m ho\u00e0n thi\u1ec7n tr\u1ea3i qua trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng. S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ec3 hi\u1ec7n \u1edf kh\u1ea3 n\u0103ng duy tr\u00ec t\u00ednh k\u1ef5 n\u01b0\u1edbc l\u00e2u d\u00e0i v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc trong v\u1eadt li\u1ec7u h\u1ed7n h\u1ee3p.<\/p>\n\n\n\n

C\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh ch\u00ednh v\u00e0 nh\u1eefng g\u00ec ch\u00fang ki\u1ec3m so\u00e1t<\/h2>\n\n\n\n

T\u1ed1c \u0111\u1ed9 t\u1ea3i ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n\n\n\n

Axit stearic th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u00eam v\u00e0o v\u1edbi t\u1ef7 l\u1ec7 0,5-1,21 TP3T theo tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a nguy\u00ean li\u1ec7u canxi cacbonat. T\u1ef7 l\u1ec7 t\u1ed1i \u01b0u cho m\u1ed9t lo\u1ea1i CaCO3 c\u1ee5 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t h\u1ea1t: c\u00e1c h\u1ea1t m\u1ecbn h\u01a1n c\u00f3 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb kh\u1ed1i l\u01b0\u1ee3ng cao h\u01a1n v\u00e0 c\u1ea7n nhi\u1ec1u ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh h\u01a1n \u0111\u1ec3 t\u1ea1o l\u1edbp ph\u1ee7 \u0111\u01a1n.<\/p>\n\n\n\n

Kh\u00e1i ni\u1ec7m v\u1ec1 l\u1edbp ph\u1ee7 \u0111\u01a1n ph\u00e2n t\u1eed r\u1ea5t quan tr\u1ecdng. M\u1ed9t ph\u00e2n t\u1eed axit stearic chi\u1ebfm kho\u1ea3ng 0,20-0,22 nm\u00b2 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t khi h\u1ea5p ph\u1ee5 ph\u1eb3ng, ho\u1eb7c kho\u1ea3ng 0,05 nm\u00b2 khi \u0111\u1ee9ng vu\u00f4ng g\u00f3c (h\u01b0\u1edbng li\u00ean k\u1ebft h\u00f3a h\u1ecdc tr\u00ean CaCO3). M\u1ed9t l\u1edbp ph\u1ee7 \u0111\u01a1n ph\u00e2n t\u1eed ho\u00e0n ch\u1ec9nh \u2014 m\u1ee5c ti\u00eau \u2014 mang l\u1ea1i hi\u1ec7u qu\u1ea3 k\u1ef5 n\u01b0\u1edbc t\u1ed1i \u0111a tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb chi ph\u00ed ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh. L\u1edbp ph\u1ee7 l\u00f3t \u0111\u1ec3 l\u1ea1i c\u00e1c m\u1ea3ng \u01b0a n\u01b0\u1edbc tr\u1ea7n tr\u00ean b\u1ec1 m\u1eb7t; l\u1edbp ph\u1ee7 qu\u00e1 d\u00e0y t\u1ea1o ra l\u01b0\u1ee3ng ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh t\u1ef1 do d\u01b0 th\u1eeba ho\u1ea1t \u0111\u1ed9ng nh\u01b0 ch\u1ea5t b\u00f4i tr\u01a1n trong h\u1ee3p ch\u1ea5t v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh gia c\u00f4ng (ch\u1ea3y nh\u1ef1a, hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft tinh b\u1ec1 m\u1eb7t).<\/p>\n\n\n\n

\u01af\u1edbc t\u00ednh t\u1ea3i tr\u1ecdng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh m\u1ee5c ti\u00eau cho ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n<\/strong>
D50 2-3 \u00b5m CaCO3 (BET ~3-4 m2\/g): <\/strong>H\u00e0m l\u01b0\u1ee3ng axit stearic \u0111i\u1ec3n h\u00ecnh: 0,9-1,21 TP3T theo tr\u1ecdng l\u01b0\u1ee3ng
D50 5-8 \u00b5m CaCO3 (BET ~1,5-2 m2\/g): <\/strong>H\u00e0m l\u01b0\u1ee3ng axit stearic \u0111i\u1ec3n h\u00ecnh: 0,6-0,91 TP3T theo tr\u1ecdng l\u01b0\u1ee3ng
D50 10-15 \u00b5m CaCO3 (BET ~0,8-1,2 m2\/g): <\/strong>H\u00e0m l\u01b0\u1ee3ng axit stearic \u0111i\u1ec3n h\u00ecnh: 0,4-0,71 TP3T theo tr\u1ecdng l\u01b0\u1ee3ng
C\u00e1ch t\u00ednh to\u00e1n ch\u00ednh x\u00e1c: <\/strong>L\u01b0\u1ee3ng t\u1ea3i l\u00fd thuy\u1ebft (g\/100g) = Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t BET (m\u00b2\/g) \u00d7 0,004. Ki\u1ec3m tra l\u1ea1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m t\u1ef7 l\u1ec7 k\u00edch ho\u1ea1t.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

T\u1ed1c \u0111\u1ed9 ghim v\u00e0 th\u1eddi gian l\u01b0u tr\u00fa<\/h3>\n\n\n\n

T\u1ed1c \u0111\u1ed9 quay c\u1ee7a r\u00f4to ki\u1ec3m so\u00e1t c\u1ea3 nhi\u1ec7t l\u01b0\u1ee3ng ma s\u00e1t v\u00e0 n\u0103ng l\u01b0\u1ee3ng k\u00edch ho\u1ea1t c\u01a1 h\u1ecdc. T\u1ed1c \u0111\u1ed9 c\u00e0ng cao th\u00ec nhi\u1ec7t \u0111\u1ed9 c\u00e0ng t\u0103ng v\u00e0 qu\u00e1 tr\u00ecnh k\u00edch ho\u1ea1t c\u01a1 h\u00f3a h\u1ecdc c\u00e0ng m\u1ea1nh m\u1ebd \u2014 nh\u01b0ng \u0111\u1ed3ng th\u1eddi th\u1eddi gian l\u01b0u tr\u00fa tr\u00ean m\u1ed7i h\u1ea1t c\u00e0ng ng\u1eafn (v\u00ec v\u1eadt li\u1ec7u b\u1ecb \u0111\u1ea9y ra nhanh h\u01a1n). H\u1ea7u h\u1ebft c\u00e1c m\u00e1y nghi\u1ec1n tr\u1ee5c v\u00edt \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi ph\u1ea1m vi t\u1ed1c \u0111\u1ed9 t\u1ed1i \u01b0u c\u1ed1 \u0111\u1ecbnh cho canxi cacbonat v\u1edbi axit stearic: th\u01b0\u1eddng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi v\u1eadn t\u1ed1c ngo\u1ea1i vi t\u1eeb 150-200 m\/s \u1edf v\u00f2ng tr\u1ee5c v\u00edt ngo\u00e0i. Ch\u1ea1y d\u01b0\u1edbi ph\u1ea1m vi n\u00e0y s\u1ebd l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 ph\u1ee7; ch\u1ea1y tr\u00ean ph\u1ea1m vi n\u00e0y c\u00f3 th\u1ec3 l\u00e0m qu\u00e1 nhi\u1ec7t ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh, g\u00e2y ra s\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t c\u1ee7a l\u1edbp ph\u1ee7 stearat.<\/p>\n\n\n\n

Nhi\u1ec7t \u0111\u1ed9 nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ed9 kh\u00f4 c\u1ee7a v\u1eadt li\u1ec7u<\/h3>\n\n\n\n

\u0110\u1ed9 \u1ea9m tr\u00ean b\u1ec1 m\u1eb7t CaCO3 c\u1ea1nh tranh v\u1edbi ph\u1ea3n \u1ee9ng t\u1ea1o l\u1edbp ph\u1ee7 stearat. C\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc li\u00ean k\u1ebft v\u1edbi c\u00e1c ion canxi tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf tr\u01b0\u1edbc khi stearat c\u00f3 th\u1ec3 ph\u1ea3n \u1ee9ng. Nguy\u00ean li\u1ec7u c\u00f3 \u0111\u1ed9 \u1ea9m tr\u00ean 0,3-0,5% s\u1ebd lu\u00f4n t\u1ea1o ra t\u1ef7 l\u1ec7 ho\u1ea1t h\u00f3a th\u1ea5p h\u01a1n so v\u1edbi nguy\u00ean li\u1ec7u kh\u00f4 \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1. Nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t s\u1ea5y kh\u00f4 nguy\u00ean li\u1ec7u CaCO3 xu\u1ed1ng d\u01b0\u1edbi 0,2% \u0111\u1ed9 \u1ea9m tr\u01b0\u1edbc khi bi\u1ebfn t\u00ednh, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i m\u1ecbn nh\u1ea5t, n\u01a1i di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb kh\u1ed1i l\u01b0\u1ee3ng cao nh\u1ea5t v\u00e0 s\u1ef1 c\u1ea1nh tranh c\u1ee7a \u0111\u1ed9 \u1ea9m l\u00e0 \u0111\u00e1ng k\u1ec3 nh\u1ea5t.<\/p>\n\n\n\n

M\u1ed9t s\u1ed1 m\u00e1y nghi\u1ec1n tr\u1ee5c l\u0103n c\u00f3 th\u00eam b\u1ed9 ph\u1eadn l\u00e0m n\u00f3ng s\u01a1 b\u1ed9 nh\u1eb9 tr\u01b0\u1edbc v\u00f9ng bi\u1ebfn t\u00ednh v\u00ec l\u00fd do n\u00e0y \u2014 kh\u00f4ng ph\u1ea3i \u0111\u1ec3 l\u00e0m tan ch\u1ea3y ch\u1ea5t bi\u1ebfn t\u00ednh, m\u00e0 \u0111\u1ec3 lo\u1ea1i b\u1ecf h\u01a1i \u1ea9m c\u00f2n s\u00f3t l\u1ea1i tr\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nguy\u00ean li\u1ec7u tr\u01b0\u1edbc khi ch\u00fang \u0111i v\u00e0o v\u00f9ng tr\u1ee5c l\u0103n.<\/p>\n\n\n\n

C\u00e1ch ki\u1ec3m tra xem vi\u1ec7c s\u1eeda \u0111\u1ed5i \u0111\u00e3 c\u00f3 hi\u1ec7u qu\u1ea3 hay ch\u01b0a<\/h2>\n\n\n\n

Th\u1ef1c hi\u1ec7n c\u1ea3 ba b\u00e0i ki\u1ec3m tra c\u00f9ng l\u00fac s\u1ebd cho th\u1ea5y b\u1ee9c tranh to\u00e0n di\u1ec7n v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng s\u1eeda \u0111\u1ed5i. Ch\u1ec9 th\u1ef1c hi\u1ec7n m\u1ed9t trong s\u1ed1 \u0111\u00f3 s\u1ebd cho th\u1ea5y c\u00e1i nh\u00ecn kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7.<\/p>\n\n\n\n

T\u1ef7 l\u1ec7 k\u00edch ho\u1ea1t<\/h3>\n\n\n\n

T\u1ed1c \u0111\u1ed9 ho\u1ea1t h\u00f3a \u0111o l\u01b0\u1eddng t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m b\u1ec1 m\u1eb7t CaCO3 \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i c\u00f3 t\u00ednh k\u1ef5 n\u01b0\u1edbc. C\u00e1ch th\u1eed: cho m\u1ed9t l\u01b0\u1ee3ng b\u1ed9t \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i \u0111\u00e3 \u0111ong v\u00e0o n\u01b0\u1edbc, khu\u1ea5y nh\u1eb9 v\u00e0 \u0111o t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m ph\u1ea7n n\u1ed5i (k\u1ef5 n\u01b0\u1edbc, bi\u1ebfn \u0111\u1ed5i t\u1ed1t) so v\u1edbi ph\u1ea7n ch\u00ecm (\u01b0a n\u01b0\u1edbc, ch\u01b0a bi\u1ebfn \u0111\u1ed5i ho\u1eb7c bi\u1ebfn \u0111\u1ed5i ch\u01b0a \u0111\u1ea7y \u0111\u1ee7). S\u1ea3n ph\u1ea9m bi\u1ebfn \u0111\u1ed5i t\u1ed1t d\u00f9ng trong \u1ee9ng d\u1ee5ng nh\u1ef1a c\u1ea7n c\u00f3 t\u1ed1c \u0111\u1ed9 ho\u1ea1t h\u00f3a tr\u00ean 98%. D\u01b0\u1edbi 95% cho th\u1ea5y l\u1edbp ph\u1ee7 ch\u01b0a \u0111\u1ea7y \u0111\u1ee7 \u0111\u00e1ng k\u1ec3, \u0111i\u1ec1u n\u00e0y s\u1ebd th\u1ec3 hi\u1ec7n \u1edf s\u1ef1 ph\u00e2n t\u00e1n k\u00e9m v\u00e0 gi\u1ea3m c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc trong s\u1ea3n ph\u1ea9m h\u1ed7n h\u1ee3p.<\/p>\n\n\n\n

H\u1ea5p th\u1ee5 d\u1ea7u<\/h3>\n\n\n\n

Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u (\u0111\u01b0\u1ee3c \u0111o b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p d\u1ea7u h\u1ea1t lanh theo ti\u00eau chu\u1ea9n ISO 787-5) gi\u1ea3m khi qu\u00e1 tr\u00ecnh bi\u1ebfn t\u00ednh b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. CaCO3 kh\u00f4ng bi\u1ebfn t\u00ednh th\u01b0\u1eddng cho th\u1ea5y kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u t\u1eeb 25-45 g\/100g t\u00f9y thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc h\u1ea1t. S\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c bi\u1ebfn t\u00ednh t\u1ed1t cho th\u1ea5y kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u t\u1eeb 15-30 g\/100g \u2014 gi\u1ea3m 30-40%. S\u1ef1 gi\u1ea3m n\u00e0y r\u1ea5t \u0111\u00e1ng k\u1ec3 v\u00ec kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u trong th\u1eed nghi\u1ec7m n\u00e0y t\u01b0\u01a1ng quan v\u1edbi nhu c\u1ea7u ch\u1ea5t h\u00f3a d\u1ebbo v\u00e0 ch\u1ea5t k\u1ebft d\u00ednh trong c\u00e1c c\u00f4ng th\u1ee9c h\u1ed7n h\u1ee3p th\u1ef1c t\u1ebf. Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u th\u1ea5p h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi chi ph\u00ed ph\u1ed1i tr\u1ed9n th\u1ea5p h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd t\u1ed1t h\u01a1n \u1edf t\u1ea3i tr\u1ecdng ch\u1ea5t \u0111\u1ed9n cao.<\/p>\n\n\n\n

G\u00f3c ti\u1ebfp x\u00fac<\/h3>\n\n\n\n

M\u1ed9t gi\u1ecdt n\u01b0\u1edbc \u0111\u1eb7t tr\u00ean \u0111\u0129a CaCO3 n\u00e9n ch\u1eb7t ch\u01b0a qua x\u1eed l\u00fd s\u1ebd lan ra ngay l\u1eadp t\u1ee9c \u2014 g\u00f3c ti\u1ebfp x\u00fac g\u1ea7n 0\u00b0. Tr\u00ean CaCO3 \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd t\u1ed1t, gi\u1ecdt n\u01b0\u1edbc s\u1ebd t\u1ea1o th\u00e0nh c\u00e1c h\u1ea1t: g\u00f3c ti\u1ebfp x\u00fac 100-120\u00b0 \u0111\u1ed1i v\u1edbi l\u1edbp ph\u1ee7 axit stearic, cao h\u01a1n \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng silan. \u0110o g\u00f3c ti\u1ebfp x\u00fac (b\u1eb1ng m\u00e1y \u0111o g\u00f3c) l\u00e0 c\u00e1ch x\u00e1c nh\u1eadn tr\u1ef1c ti\u1ebfp nh\u1ea5t v\u1ec1 t\u00ednh k\u1ef5 n\u01b0\u1edbc c\u1ee7a b\u1ec1 m\u1eb7t, nh\u01b0ng n\u00f3 \u0111\u00f2i h\u1ecfi ph\u1ea3i \u00e9p m\u1ed9t \u0111\u0129a \u0111\u1ed3ng nh\u1ea5t v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1ea5y m\u1eabu ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng h\u01a1n l\u00e0 \u0111\u1ec3 gi\u00e1m s\u00e1t s\u1ea3n xu\u1ea5t li\u00ean t\u1ee5c.<\/p>\n\n\n\n

B\u00e0i ki\u1ec3m tra<\/strong><\/td>CaCO3 kh\u00f4ng bi\u1ebfn \u0111\u1ed5i<\/strong><\/td>CaCO3 \u0111\u01b0\u1ee3c bi\u1ebfn t\u00ednh t\u1ed1t (Axit stearic)<\/strong><\/td><\/tr>
T\u1ef7 l\u1ec7 k\u00edch ho\u1ea1t<\/td>0%<\/td>\u226598%<\/td><\/tr>
Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 d\u1ea7u (g\/100g)<\/td>25-45<\/td>15-30<\/td><\/tr>
G\u00f3c ti\u1ebfp x\u00fac n\u01b0\u1edbc<\/td><10\u00b0 (lan nhanh ch\u00f3ng)<\/td>100-120\u00b0 (h\u1ea1t)<\/td><\/tr>
S\u1ef1 l\u1eafng \u0111\u1ecdng tr\u1ea7m t\u00edch trong n\u01b0\u1edbc<\/td>Ch\u00ecm nhanh<\/td>Phao (>98% l\u00e0 phao d\u00f9ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh t\u1ed1t)<\/td><\/tr>
\u0110\u1ed9 nh\u1edbt h\u1ed7n h\u1ee3p (t\u01b0\u01a1ng \u0111\u1ed1i)<\/td>\u0110\u01b0\u1eddng c\u01a1 s\u1edf<\/td>10-30% th\u1ea5p h\u01a1n \u1edf c\u00f9ng m\u1ee9c t\u1ea3i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

M\u00e1y nghi\u1ec1n tr\u1ee5c v\u00edt so v\u1edbi m\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao: Lo\u1ea1i n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ea1n?<\/h2>\n\n\n\n
\"Pin
Pin Mill cho s\u01a1n t\u0129nh \u0111i\u1ec7n<\/figcaption><\/figure>\n\n\n\n

C\u1ea3 hai c\u00f4ng ngh\u1ec7 \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u01b0\u01a1ng m\u1ea1i \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t CaCO3. Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 n\u00e0o ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t, lo\u1ea1i ch\u1ea5t bi\u1ebfn \u0111\u1ed5i v\u00e0 y\u00eau c\u1ea7u v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7 c\u1ee7a \u1ee9ng d\u1ee5ng cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n

Nh\u00e2n t\u1ed1<\/strong><\/td>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh m\u00e1y nghi\u1ec1n ch\u1ed1t<\/strong><\/td>M\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao (theo m\u1ebb)<\/strong><\/td><\/tr>
Ch\u1ebf \u0111\u1ed9 s\u1ea3n xu\u1ea5t<\/td>Li\u00ean t\u1ee5c<\/td>S\u1ea3n xu\u1ea5t theo m\u1ebb (th\u01b0\u1eddng t\u1eeb 200-500 kg m\u1ed7i chu k\u1ef3)<\/td><\/tr>
Ph\u01b0\u01a1ng ph\u00e1p gia nhi\u1ec7t<\/td>Ma s\u00e1t (kh\u00f4ng c\u1ea7n ngu\u1ed3n b\u00ean ngo\u00e0i)<\/td>L\u1edbp v\u1ecf ngo\u00e0i + ma s\u00e1t c\u01a1 h\u1ecdc<\/td><\/tr>
\u0110\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u nhi\u1ec7t \u0111\u1ed9<\/td>Tuy\u1ec7t v\u1eddi \u2014 m\u1ecdi h\u1ea1t \u0111\u1ec1u \u0111i qua c\u00f9ng m\u1ed9t tr\u01b0\u1eddng ghim.<\/td>Bi\u1ebfn s\u1ed1 \u2014 \u0111\u1ed9 d\u1ed1c gi\u1eefa t\u01b0\u1eddng v\u00e0 t\u00e2m<\/td><\/tr>
Ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p cho<\/td>C\u00e1c ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh d\u1ea1ng r\u1eafn (axit stearic, c\u00e1c axit b\u00e9o kh\u00e1c, silan r\u1eafn)<\/td>Ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh d\u1ea1ng r\u1eafn v\u00e0 l\u1ecfng<\/td><\/tr>
Th\u1eddi gian l\u01b0u tr\u00fa<\/td><1 gi\u00e2y<\/td>10-30 ph\u00fat m\u1ed7i m\u1ebb<\/td><\/tr>
N\u0103ng l\u01b0\u1ee3ng tr\u00ean m\u1ed7i t\u1ea5n<\/td>Th\u1ea5p h\u01a1n (kh\u00f4ng l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng gia nhi\u1ec7t gi\u1eefa c\u00e1c m\u1ebb)<\/td>Cao h\u01a1n (n\u0103ng l\u01b0\u1ee3ng kh\u1edfi \u0111\u1ed9ng theo l\u00f4 \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i trong m\u1ed7i chu k\u1ef3)<\/td><\/tr>
Ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7<\/td>R\u1ea5t \u0111\u1ed3ng nh\u1ea5t \u2014 s\u1ef1 ph\u00e2n t\u00e1n li\u00ean t\u1ee5c ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh l\u1ea1i c\u00e1c c\u1ee5m h\u1ea1t.<\/td>C\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u n\u1ebfu xu\u1ea5t hi\u1ec7n c\u00e1c \u0111i\u1ec3m n\u00f3ng g\u1ea7n \u00e1o kho\u00e1c.<\/td><\/tr>
T\u1ed1t nh\u1ea5t cho<\/td>S\u1ea3n l\u01b0\u1ee3ng tr\u00ean ~1 t\u1ea5n\/gi\u1edd, ch\u1ea5t ph\u1ee5 gia r\u1eafn, ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh.<\/td>S\u1ea3n xu\u1ea5t theo l\u00f4 nh\u1ecf linh ho\u1ea1t, ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh d\u1ea1ng l\u1ecfng, nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Ngo\u00e0i Canxi Cacbonat: C\u00e1c kho\u00e1ng ch\u1ea5t kh\u00e1c m\u00e0 m\u00e1y nghi\u1ec1n tr\u1ee5c ch\u00ednh bi\u1ebfn \u0111\u1ed5i<\/h3>\n\n\n\n

C\u01a1 ch\u1ebf c\u1ea3i ti\u1ebfn c\u1ee7a m\u00e1y nghi\u1ec1n tr\u1ee5c v\u00edt \u2014 gia nhi\u1ec7t ma s\u00e1t, k\u00edch ho\u1ea1t c\u01a1 h\u00f3a h\u1ecdc, ph\u00e2n t\u00e1n li\u00ean t\u1ee5c \u2014 \u00e1p d\u1ee5ng cho b\u1ea5t k\u1ef3 ch\u1ea5t \u0111\u1ed9n kho\u00e1ng n\u00e0o m\u00e0 m\u1ee5c ti\u00eau l\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh k\u1ef5 n\u01b0\u1edbc b\u1ec1 m\u1eb7t. C\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb, v\u1edbi t\u1ed1c \u0111\u1ed9 c\u1ea5p li\u1ec7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh v\u00e0 \u0111\u00f4i khi c\u1ea3 h\u00ecnh d\u1ea1ng tr\u1ee5c v\u00edt \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh, c\u00f3 th\u1ec3 x\u1eed l\u00fd:<\/p>\n\n\n\n

    \n
  • Cao lanh: <\/strong>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng cao su v\u00e0 polyme y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1n t\u1ed1t h\u01a1n v\u00e0 gi\u1ea3m \u0111\u1ed9 nh\u1ea1y c\u1ea3m v\u1edbi n\u01b0\u1edbc. C\u00e1c ch\u1ea5t li\u00ean k\u1ebft aluminat v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd silan \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong \u0111i\u1ec1u ki\u1ec7n m\u00e1y nghi\u1ec1n tr\u1ee5c.<\/li>\n\n\n\n
  • B\u1ed9t talc: <\/strong>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t polypropylen, vi\u1ec7c bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t gi\u00fap c\u1ea3i thi\u1ec7n giao di\u1ec7n gi\u1eefa ch\u1ea5t \u0111\u1ed9n v\u00e0 ch\u1ea5t n\u1ec1n, \u0111\u1ed3ng th\u1eddi cho ph\u00e9p t\u1ea3i tr\u1ecdng cao h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m t\u0103ng \u0111\u1ed9 nh\u1edbt.<\/li>\n\n\n\n
  • Magie hydroxit: <\/strong>\u0111\u1ed1i v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t c\u00e1p ch\u1ed1ng ch\u00e1y, c\u1ea7n ph\u1ea3i s\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t b\u1eb1ng silan ho\u1eb7c axit b\u00e9o \u0111\u1ec3 duy tr\u00ec c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc \u1edf h\u00e0m l\u01b0\u1ee3ng Mg(OH)2 cao (60%+) c\u1ea7n thi\u1ebft cho kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y hi\u1ec7u qu\u1ea3.<\/li>\n\n\n\n
  • Bari sulfat: <\/strong>\u0110\u1ed1i v\u1edbi nh\u1ef1a k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1eb7c bi\u1ec7t, l\u1edbp ph\u1ee7 stearat gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1n trong h\u1ec7 th\u1ed1ng nh\u1ef1a k\u1ef5 n\u01b0\u1edbc.<\/li>\n<\/ul>\n\n\n\n

    Vi\u1ec7c t\u00ednh to\u00e1n l\u01b0\u1ee3ng ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh v\u00e0 c\u00e1c th\u1eed nghi\u1ec7m x\u00e1c minh (t\u1ed1c \u0111\u1ed9 ho\u1ea1t h\u00f3a, h\u1ea5p th\u1ee5 d\u1ea7u, g\u00f3c ti\u1ebfp x\u00fac) \u00e1p d\u1ee5ng cho t\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u n\u00e0y v\u1edbi nh\u1eefng \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc b\u1ec1 m\u1eb7t c\u1ee5 th\u1ec3 c\u1ee7a ch\u00fang. V\u00ed d\u1ee5, cao lanh c\u00f3 b\u1ec1 m\u1eb7t aluminosilicat ph\u1ea3n \u1ee9ng kh\u00e1c nhau v\u1edbi axit stearic so v\u1edbi canxit \u2014 c\u00e1c ch\u1ea5t li\u00ean k\u1ebft silan th\u01b0\u1eddng hi\u1ec7u qu\u1ea3 h\u01a1n \u0111\u1ed1i v\u1edbi cao lanh v\u00ec ch\u00fang c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c li\u00ean k\u1ebft m\u1ea1nh h\u01a1n v\u1edbi c\u00e1c nh\u00f3m Al\u2013OH tr\u00ean b\u1ec1 m\u1eb7t.<\/p>\n\n\n\n

    T\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t canxi cacbonat cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n?<\/strong>
    C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a EPIC Powder Machinery \u0111\u00e3 c\u1ea5u h\u00ecnh c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea3i ti\u1ebfn m\u00e1y nghi\u1ec1n tr\u1ee5c cho canxi cacbonat, cao lanh, b\u1ed9t talc, magie hydroxit v\u00e0 bari sulfat v\u1edbi nhi\u1ec1u lo\u1ea1i ch\u1ea5t c\u1ea3i ti\u1ebfn v\u00e0 \u1ee9ng d\u1ee5ng cu\u1ed1i c\u00f9ng kh\u00e1c nhau. H\u00e3y cho ch\u00fang t\u00f4i bi\u1ebft \u0111\u1ed9 m\u1ecbn nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o, t\u1ef7 l\u1ec7 k\u00edch ho\u1ea1t m\u1ee5c ti\u00eau, lo\u1ea1i ch\u1ea5t c\u1ea3i ti\u1ebfn v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n \u2014 ch\u00fang t\u00f4i s\u1ebd \u0111\u1ec1 xu\u1ea5t c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p v\u00e0 ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m tr\u01b0\u1edbc khi b\u1ea1n quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0. Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c th\u1eed nghi\u1ec7m c\u1ea3i ti\u1ebfn quy m\u00f4 th\u00ed \u0111i\u1ec3m t\u1ea1i c\u01a1 s\u1edf R&D c\u1ee7a ch\u00fang t\u00f4i. B\u1ea1n cung c\u1ea5p nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 ch\u1ea5t c\u1ea3i ti\u1ebfn; ch\u00fang t\u00f4i s\u1ebd tr\u1ea3 l\u1ea1i s\u1ea3n ph\u1ea9m \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn v\u1edbi \u0111\u1ea7y \u0111\u1ee7 d\u1eef li\u1ec7u \u0111\u1eb7c tr\u01b0ng bao g\u1ed3m t\u1ef7 l\u1ec7 k\u00edch ho\u1ea1t, \u0111\u1ed9 h\u1ea5p th\u1ee5 d\u1ea7u v\u00e0 g\u00f3c ti\u1ebfp x\u00fac.\u00a0\u00a0<\/strong>
    Y\u00eau c\u1ea7u d\u00f9ng th\u1eed s\u1ea3n ph\u1ea9m: www.quartz-grinding.com\/contact\u00a0\u00a0<\/strong>
    Kh\u00e1m ph\u00e1 d\u00f2ng s\u1ea3n ph\u1ea9m ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh m\u00e1y nghi\u1ec1n b\u1ed9t EPIC: www.quartz-grinding.com<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n

    S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00e1y nghi\u1ec1n tr\u1ee5c v\u00e0 m\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao trong vi\u1ec7c c\u1ea3i ti\u1ebfn b\u1ec1 m\u1eb7t canxi cacbonat l\u00e0 g\u00ec?<\/h3>\n\n\n\n

    S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n n\u1eb1m \u1edf t\u00ednh li\u00ean t\u1ee5c v\u00e0 c\u01a1 ch\u1ebf gia nhi\u1ec7t. M\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao l\u00e0 m\u00e1y ho\u1ea1t \u0111\u1ed9ng theo m\u1ebb: n\u00f3 n\u1ea1p m\u1ed9t l\u01b0\u1ee3ng canxi cacbonat v\u00e0 ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh c\u1ed1 \u0111\u1ecbnh, gia nhi\u1ec7t m\u1ebb b\u1eb1ng l\u1edbp v\u1ecf ngo\u00e0i trong khi r\u00f4to t\u1ed1c \u0111\u1ed9 cao t\u1ea1o th\u00eam nhi\u1ec7t ma s\u00e1t, v\u00e0 x\u1ea3 li\u1ec7u sau 15-30 ph\u00fat. Trong giai \u0111o\u1ea1n gia nhi\u1ec7t, v\u1eadt li\u1ec7u g\u1ea7n th\u00e0nh v\u1ecf \u0111\u01b0\u1ee3c gia nhi\u1ec7t s\u1ebd n\u00f3ng h\u01a1n v\u1eadt li\u1ec7u \u1edf trung t\u00e2m \u2014 s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 20-30\u00b0C tr\u00ean m\u1ed9t m\u1ebb l\u1edbn l\u00e0 \u0111i\u1ec1u th\u01b0\u1eddng th\u1ea5y. S\u1ef1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c ph\u1ee7 \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u trong khi c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c l\u1ea1i \u1edf d\u01b0\u1edbi \u0111i\u1ec3m n\u00f3ng ch\u1ea3y c\u1ee7a ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh. M\u00e1y nghi\u1ec1n tr\u1ee5c quay ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c: nguy\u00ean li\u1ec7u \u0111i v\u00e0o \u1edf trung t\u00e2m, \u0111i qua c\u00e1c v\u00f2ng tr\u1ee5c quay ng\u01b0\u1ee3c chi\u1ec1u nhau li\u00ean ti\u1ebfp trong v\u00f2ng ch\u01b0a \u0111\u1ea7y m\u1ed9t gi\u00e2y, v\u00e0 tho\u00e1t ra v\u1edbi tr\u1ea1ng th\u00e1i \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ho\u00e0n to\u00e0n. M\u1ed7i h\u1ea1t \u0111\u1ec1u tr\u1ea3i qua c\u00f9ng m\u1ed9t tr\u01b0\u1eddng tr\u1ee5c v\u00e0 c\u00f9ng m\u1ed9t nhi\u1ec7t ma s\u00e1t. \u0110\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u nhi\u1ec7t \u0111\u1ed9 t\u1ed1t h\u01a1n nhi\u1ec1u. \u0110\u1ed1i v\u1edbi s\u1ea3n l\u01b0\u1ee3ng tr\u00ean kho\u1ea3ng 1 t\u1ea5n\/gi\u1edd v\u1edbi ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh d\u1ea1ng r\u1eafn, m\u00e1y nghi\u1ec1n tr\u1ee5c quay lu\u00f4n t\u1ea1o ra t\u1ef7 l\u1ec7 ho\u1ea1t h\u00f3a cao h\u01a1n v\u1edbi chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng th\u1ea5p h\u01a1n tr\u00ean m\u1ed7i t\u1ea5n.<\/p>\n\n\n\n

    T\u00f4i c\u00f3 th\u1ec3 t\u00ednh to\u00e1n li\u1ec1u l\u01b0\u1ee3ng axit stearic ch\u00ednh x\u00e1c cho lo\u1ea1i canxi cacbonat c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n

    Vi\u1ec7c t\u00ednh to\u00e1n l\u00fd thuy\u1ebft b\u1eaft \u0111\u1ea7u t\u1eeb di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang BET c\u1ee7a nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o. \u0110o di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t BET (ph\u01b0\u01a1ng ph\u00e1p h\u1ea5p ph\u1ee5 nit\u01a1, ISO 9277) v\u00e0 nh\u00e2n v\u1edbi kho\u1ea3ng 0,004 \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng axit stearic m\u1ee5c ti\u00eau t\u00ednh b\u1eb1ng gam tr\u00ean 100 gam CaCO3. V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: CaCO3 D50 5 \u03bcm v\u1edbi BET 2,0 m\u00b2\/g c\u00f3 l\u01b0\u1ee3ng m\u1ee5c ti\u00eau t\u00ednh to\u00e1n l\u00e0 2,0 \u00d7 0,004 = 0,08 g\/g = 0,8% theo tr\u1ecdng l\u01b0\u1ee3ng. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u \u2014 c\u1ea7n ki\u1ec3m ch\u1ee9ng b\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n c\u00e1c th\u1eed nghi\u1ec7m v\u1edbi l\u01b0\u1ee3ng ch\u1ea5t ph\u1ee5 gia 0,6%, 0,8% v\u00e0 1,0% v\u00e0 \u0111o t\u1ed1c \u0111\u1ed9 ho\u1ea1t h\u00f3a t\u1ea1i m\u1ed7i \u0111i\u1ec3m. L\u01b0\u1ee3ng ch\u1ea5t ph\u1ee5 gia t\u1ed1i \u01b0u th\u01b0\u1eddng l\u00e0 \u0111i\u1ec3m m\u00e0 t\u1ed1c \u0111\u1ed9 ho\u1ea1t h\u00f3a \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u1ed5n \u0111\u1ecbnh (th\u00eam ch\u1ea5t ph\u1ee5 gia kh\u00f4ng c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9) \u2014 l\u01b0\u1ee3ng ch\u1ea5t ph\u1ee5 gia d\u01b0 th\u1eeba tr\u00ean \u0111i\u1ec3m n\u00e0y s\u1ebd t\u1ea1o ra axit t\u1ef1 do trong s\u1ea3n ph\u1ea9m, g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh ph\u1ed1i tr\u1ed9n. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i GCC th\u01b0\u01a1ng m\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u1ef1a, h\u00e0m l\u01b0\u1ee3ng axit stearic t\u1ed1i \u01b0u n\u1eb1m trong kho\u1ea3ng t\u1eeb 0,5% \u0111\u1ebfn 1,2% theo tr\u1ecdng l\u01b0\u1ee3ng.<\/p>\n\n\n\n

    T\u00f4i n\u00ean nh\u1eafm \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 k\u00edch ho\u1ea1t n\u00e0o cho canxi cacbonat \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e0ng polyetylen?<\/h3>\n\n\n\n

    \u0110\u1ed1i v\u1edbi m\u00e0ng polyetylen th\u1ed5i \u2013 \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe nh\u1ea5t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u1ee7a CaCO3 \u2013 m\u1ee5c ti\u00eau t\u1ef7 l\u1ec7 ho\u1ea1t h\u00f3a l\u00e0 99% tr\u1edf l\u00ean. Trong m\u00e0ng th\u1ed5i, ngay c\u1ea3 m\u1ed9t ph\u1ea7n nh\u1ecf b\u1ec1 m\u1eb7t CaCO3 kh\u00f4ng \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i (\u01b0a n\u01b0\u1edbc) c\u0169ng t\u1ea1o ra c\u00e1c \u0111i\u1ec3m y\u1ebfu trong ma tr\u1eadn m\u00e0ng, c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh c\u00e1c khuy\u1ebft t\u1eadt d\u1ea1ng l\u1ed7 kim ho\u1eb7c \u0111i\u1ec3m kh\u1edfi ph\u00e1t r\u00e1ch trong qu\u00e1 tr\u00ecnh k\u00e9o gi\u00e3n. Th\u1eed nghi\u1ec7m t\u1ef7 l\u1ec7 ho\u1ea1t h\u00f3a (ph\u01b0\u01a1ng ph\u00e1p n\u1ed5i trong n\u01b0\u1edbc) ph\u1ea3i cho th\u1ea5y \u00edt h\u01a1n 1% s\u1ea3n ph\u1ea9m b\u1ecb ch\u00ecm sau khi khu\u1ea5y nh\u1eb9. \u0110\u1ed1i v\u1edbi m\u00e0ng th\u1ed5i, b\u1ea1n c\u0169ng n\u00ean ki\u1ec3m tra \u0111\u1ed9 h\u1ea5p th\u1ee5 d\u1ea7u (m\u1ee5c ti\u00eau d\u01b0\u1edbi 25 g\/100g \u0111\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m D50 5-8 \u03bcm) v\u00e0 ki\u1ec3m tra axit t\u1ef1 do \u2013 axit stearic t\u1ef1 do trong s\u1ea3n ph\u1ea9m tr\u00ean kho\u1ea3ng 0,1% c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng m\u1edd b\u1ec1 m\u1eb7t v\u00e0 ch\u1ea3y nh\u1ecf gi\u1ecdt trong qu\u00e1 tr\u00ecnh \u00e9p \u0111\u00f9n m\u00e0ng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u00edt kh\u1eaft khe h\u01a1n nh\u01b0 \u1ed1ng PVC ho\u1eb7c h\u1ee3p ch\u1ea5t tr\u00e1m c\u00e1p, t\u1ef7 l\u1ec7 ho\u1ea1t h\u00f3a 95-98% th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn, v\u1edbi \u0111\u1ed9 h\u1ea5p th\u1ee5 d\u1ea7u d\u01b0\u1edbi 30 g\/100g.<\/p>\n\n\n\n

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