{"id":110191,"date":"2021-08-24T11:53:34","date_gmt":"2021-08-24T03:53:34","guid":{"rendered":"https:\/\/www.alpapowder.com\/110191\/"},"modified":"2021-08-25T15:39:38","modified_gmt":"2021-08-25T07:39:38","slug":"quy-trinh-san-xuat-va-bien-doi-canxi-cacbonat-nang","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/110191\/","title":{"rendered":"Quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 bi\u1ebfn \u0111\u1ed5i canxi cacbonat n\u1eb7ng"},"content":{"rendered":"<p>Canxi cacbonat n\u1eb7ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat xay, ho\u1eb7c g\u1ecdi t\u1eaft l\u00e0 canxi n\u1eb7ng, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch ch\u1ebf bi\u1ebfn c\u00e1c kho\u00e1ng ch\u1ea5t cacbonat t\u1ef1 nhi\u00ean l\u00e0m nguy\u00ean li\u1ec7u th\u00f4. N\u00f3 c\u00f3 \u0111\u1ed9 tinh khi\u1ebft h\u00f3a h\u1ecdc cao, \u0111\u1ed9 tr\u01a1 cao, \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t, s\u1ebd kh\u00f4ng b\u1ecb ph\u00e2n h\u1ee7y d\u01b0\u1edbi 400 \u2103, \u0111\u1ed9 tr\u1eafng cao, h\u1ea5p th\u1ee5 d\u1ea7u th\u1ea5p, ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 th\u1ea5p, m\u1ec1m, kh\u00f4, kh\u00f4ng ch\u1ee9a n\u01b0\u1edbc tinh th\u1ec3, \u0111\u1ed9 c\u1ee9ng th\u1ea5p, gi\u00e1 tr\u1ecb m\u00e0i m\u00f2n th\u1ea5p, kh\u00f4ng \u0111\u1ed9c h\u1ea1i , Kh\u00f4ng v\u1ecb, kh\u00f4ng m\u00f9i, ph\u00e2n t\u00e1n t\u1ed1t v\u00e0 c\u00e1c \u01b0u \u0111i\u1ec3m kh\u00e1c.<\/p>\n<p>L\u00e0 m\u1ed9t ch\u1ea5t \u0111\u1ed9n v\u00f4 c\u01a1 ch\u1ee9c n\u0103ng, canxi cacbonat ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t gi\u1ea5y, nh\u1ef1a, s\u01a1n v\u00e0 ch\u1ea5t ph\u1ee7, cao su v\u00e0 c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c. T\u1eeb quan \u0111i\u1ec3m to\u00e0n c\u1ea7u, canxi cacbonat cho s\u1ea3n xu\u1ea5t gi\u1ea5y chi\u1ebfm 60% c\u01a1 c\u1ea5u ti\u00eau th\u1ee5.<\/p>\n<p>L\u00e0 m\u1ed9t ch\u1ea5t \u0111\u1ed9n ch\u1ee9c n\u0103ng, canxi cacbonat n\u1eb7ng, s\u1ed1 l\u01b0\u1ee3ng l\u01b0\u1edbi, \u0111\u1ed9 tr\u1eafng v\u00e0 h\u00e0m l\u01b0\u1ee3ng canxi cacbonat x\u00e1c \u0111\u1ecbnh c\u00e1c l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3. 325 mesh, \u0111\u1ed9 tr\u1eafng 95%, h\u00e0m l\u01b0\u1ee3ng canxi cacbonat 98% c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m gi\u1ea5y; 325 mesh, \u0111\u1ed9 tr\u1eafng 95%, h\u00e0m l\u01b0\u1ee3ng canxi cacbonat 98,5% c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u0111\u00e1 c\u1ea9m th\u1ea1ch nh\u00e2n t\u1ea1o; 325 mesh, \u0111\u1ed9 tr\u1eafng 90%, h\u00e0m l\u01b0\u1ee3ng canxi cacbonat 98% C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng cho x\u00e2y d\u1ef1ng; 400 mesh, \u0111\u1ed9 tr\u1eafng 93%, h\u00e0m l\u01b0\u1ee3ng canxi cacbonat 96% c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho cao su; 400 mesh, \u0111\u1ed9 tr\u1eafng 95%, h\u00e0m l\u01b0\u1ee3ng canxi cacbonat 99% c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nh\u1ef1a; L\u01b0\u1edbi 400, \u0111\u1ed9 tr\u1eafng 95%, axit cacbonic h\u00e0m l\u01b0\u1ee3ng canxi 98,5% c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m g\u1ea1ch l\u00e1t n\u1ec1n.<\/p>\n<p>V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a thi\u1ebft b\u1ecb nghi\u1ec1n v\u00e0 ph\u00e2n lo\u1ea1i, s\u1ea3n xu\u1ea5t v\u00e0 nhu c\u1ea7u c\u1ee7a b\u1ed9t canxi n\u1eb7ng si\u00eau m\u1ecbn \u0111\u00e3 t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3. Trong s\u1ed1 \u0111\u00f3, vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9t canxi n\u1eb7ng 2500-6500 mesh trong s\u1ea3n xu\u1ea5t gi\u1ea5y cao c\u1ea5p c\u0169ng \u0111\u00e3 t\u0103ng l\u00ean.<\/p>\n<h4>S\u1ea3n xu\u1ea5t canxi cacbonat n\u1eb7ng<\/h4>\n<p>Nguy\u00ean li\u1ec7u th\u00f4 l\u00e0 c\u00e1c kho\u00e1ng ch\u1ea5t cacbonat nh\u01b0 v\u1ecf s\u00f2, canxit, \u0111\u00e1 c\u1ea9m th\u1ea1ch, \u0111\u00e1 v\u00f4i, \u0111\u00e1 ph\u1ea5n v\u00e0 \u0111\u00e1 dolomit.<\/p>\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd canxi n\u1eb7ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p quy tr\u00ecnh kh\u00f4, \u01b0\u1edbt v\u00e0 kh\u00f4-\u01b0\u1edbt. Ch\u1ebf bi\u1ebfn kh\u00f4 c\u00f3 l\u1ee3i cho vi\u1ec7c th\u1ef1c hi\u1ec7n quy m\u00f4 c\u00f4ng nghi\u1ec7p v\u00e0 m\u1ed9t m\u1ee9c \u0111\u1ed9 tinh ch\u1ebf s\u1ea3n ph\u1ea9m nh\u1ea5t \u0111\u1ecbnh; ch\u1ebf bi\u1ebfn \u01b0\u1edbt c\u00f3 l\u1ee3i \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 tinh ch\u1ebf s\u1ea3n ph\u1ea9m cao h\u01a1n v\u00e0 s\u1ea3n xu\u1ea5t theo ch\u1ee9c n\u0103ng; S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa quy tr\u00ecnh kh\u00f4 v\u00e0 \u01b0\u1edbt c\u00f3 l\u1ee3i \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho quy tr\u00ecnh kh\u00f4 trong c\u00e1c s\u1ea3n ph\u1ea9m cao c\u1ea5p S\u1ef1 thi\u1ebfu h\u1ee5t.<\/p>\n<p>Theo quan \u0111i\u1ec3m th\u1ef1c t\u1ebf, c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 D97 = 2500 mesh tr\u1edf xu\u1ed1ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p kh\u00f4; s\u1ea3n ph\u1ea9m c\u00f3 D97 = 2500 ~ 6500 mesh (ho\u1eb7c h\u00e0m l\u01b0\u1ee3ng cao h\u01a1n 2\u03bcm) th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u01b0\u1edbt.<\/p>\n<ul>\n<li><strong>Quy tr\u00ecnh kh\u00f4<\/strong><\/li>\n<\/ul>\n<p>C\u00e1c thi\u1ebft b\u1ecb ch\u00ednh c\u1ee7a qu\u00e1 tr\u00ecnh kh\u00f4 l\u00e0 m\u00e1y nghi\u1ec1n Raymond, m\u00e1y nghi\u1ec1n bi, m\u00e1y nghi\u1ec1n ph\u1ea3n l\u1ef1c, m\u00e1y nghi\u1ec1n con l\u0103n v\u00f2ng, m\u00e1y nghi\u1ec1n rung, m\u00e1y nghi\u1ec1n \u0111\u1ee9ng v\u00e0 m\u00e1y nghi\u1ec1n t\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc t\u1ed1c \u0111\u1ed9 cao.<\/p>\n<p>Hi\u1ec7n nay, vi\u1ec7c ch\u1ebf bi\u1ebfn kh\u00f4 c\u1ee7a c\u00e1c doanh nghi\u1ec7p quy m\u00f4 l\u1edbn tr\u00ean th\u1ebf gi\u1edbi h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb v\u00e0 c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn m\u00e1y nghi\u1ec1n \u0111\u1ee9ng. Nh\u1eefng l\u1ee3i \u00edch quy m\u00f4 l\u1edbn v\u00e0 h\u1ea1t m\u1ecbn c\u1ee7a s\u1ea3n xu\u1ea5t b\u1ed9t kh\u00f4 m\u00e1y nghi\u1ec1n \u0111\u1ee9ng l\u00e0 r\u00f5 r\u00e0ng nh\u1ea5t. N\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng h\u01b0\u1edbng nghi\u00ean c\u1ee9u ch\u00ednh trong c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn tinh b\u1ed9t canxi n\u1eb7ng trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y.<\/p>\n<ul>\n<li><strong>Qu\u00e1 tr\u00ecnh \u01b0\u1edbt<\/strong><\/li>\n<\/ul>\n<p>Ph\u01b0\u01a1ng ph\u00e1p \u01b0\u1edbt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ebf bi\u1ebfn b\u1ed9t canxi n\u1eb7ng tinh ch\u1ebf v\u00e0 ch\u1ee9c n\u0103ng, s\u1ed1 l\u01b0\u1ee3ng m\u1eaft l\u01b0\u1edbi tr\u00ean 3000, v\u00e0 thi\u1ebft b\u1ecb ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng m\u00e1y khu\u1ea5y. Th\u00eam ch\u1ea5t tr\u1ee3 nghi\u1ec1n trong m\u00e1y nghi\u1ec1n ph\u01b0\u01a1ng ti\u1ec7n m\u1ecbn c\u00f3 th\u1ec3 chu\u1ea9n b\u1ecb b\u1ed9t si\u00eau m\u1ecbn nh\u1ecf ho\u1eb7c th\u1eadm ch\u00ed nano nano.<\/p>\n<p>Nghi\u1ec1n \u01b0\u1edbt ch\u1ee7 y\u1ebfu t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m tr\u00ean 3000 mesh, v\u00e0 nghi\u1ec1n kh\u00f4 ch\u1ee7 y\u1ebfu t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m d\u01b0\u1edbi 2500 mesh. S\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi n\u1eb7ng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p \u01b0\u1edbt l\u00e0 h\u1eb9p, l\u00e0 \u0111\u01a1n ph\u01b0\u01a1ng ho\u1eb7c hai ph\u01b0\u01a1ng th\u1ee9c; s\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi n\u1eb7ng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p kh\u00f4 l\u00e0 r\u1ed9ng, v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 l\u00e0 \u0111a ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c \u0111a ph\u01b0\u01a1ng th\u1ee9c.<\/p>\n<p>C\u00e1c h\u1ea1t c\u1ee7a s\u1ea3n ph\u1ea9m nghi\u1ec1n \u01b0\u1edbt th\u01b0\u1eddng c\u00f3 d\u1ea1ng h\u00ecnh c\u1ea7u ho\u1eb7c b\u00e1n c\u1ea7u; c\u00e1c s\u1ea3n ph\u1ea9m kh\u00f4 h\u1ea7u h\u1ebft l\u00e0 kh\u00f4ng x\u00e1c \u0111\u1ecbnh v\u00e0 c\u00f3 c\u00e1c c\u1ea1nh v\u00e0 g\u00f3c r\u00f5 r\u00e0ng.<\/p>\n<ul>\n<li><strong>K\u1ebft h\u1ee3p quy tr\u00ecnh kh\u00f4 v\u00e0 \u01b0\u1edbt<\/strong><\/li>\n<\/ul>\n<p>Quy tr\u00ecnh t\u00edch h\u1ee3p kh\u00f4-\u01b0\u1edbt c\u1ee7a m\u00e1y nghi\u1ec1n \u0111\u1ee9ng + ph\u00e2n lo\u1ea1i th\u1ee9 c\u1ea5p + ph\u00e2n lo\u1ea1i b\u1eadc ba v\u00e0 nghi\u1ec1n \u01b0\u1edbt nhi\u1ec1u giai \u0111o\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m 325 ~ 800 mesh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u01a1 b\u1ea3n c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb si\u00eau nh\u1ecf cho c\u1ea5p hai v\u00e0 c\u1ea5p ba S\u1ea3n xu\u1ea5t ph\u00e2n lo\u1ea1i b\u1ed9t m\u1ecbn trung b\u00ecnh v\u00e0 cao c\u1ea5p t\u1eeb 800 \u0111\u1ebfn 2500 m\u1eaft l\u01b0\u1edbi \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a th\u1ecb tr\u01b0\u1eddng trung b\u00ecnh v\u00e0 cao c\u1ea5p. S\u1ea3n ph\u1ea9m th\u1ea5p h\u01a1n \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n \u01b0\u1edbt v\u00e0 nghi\u1ec1n m\u1ecbn kh\u00e1c v\u00e0 ph\u00e1t tri\u1ec3n ch\u1ee9c n\u0103ng, v\u00e0 s\u1ea3n xu\u1ea5t b\u1ed9t ch\u1ee9c n\u0103ng si\u00eau m\u1ecbn 2500 ~ 6500 mesh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u th\u1ecb tr\u01b0\u1eddng cao c\u1ea5p.<\/p>\n<p>Quy tr\u00ecnh t\u00edch h\u1ee3p kh\u00f4-\u01b0\u1edbt c\u1ee7a m\u00e1y nghi\u1ec1n \u0111\u1ee9ng + ph\u00e2n lo\u1ea1i th\u1ee9 c\u1ea5p + ph\u00e2n lo\u1ea1i b\u1eadc ba k\u1ebft h\u1ee3p v\u1edbi nghi\u1ec1n \u01b0\u1edbt nhi\u1ec1u giai \u0111o\u1ea1n kh\u00f4ng ch\u1ec9 hi\u1ec7n th\u1ef1c h\u00f3a quy m\u00f4 c\u00f4ng nghi\u1ec7p h\u00f3a quy m\u00f4 l\u1edbn c\u00e1c s\u1ea3n ph\u1ea9m canxi n\u1eb7ng, tinh ch\u1ebf v\u00e0 ch\u1ee9c n\u0103ng, m\u00e0 c\u00f2n c\u1ea3i thi\u1ec7n c\u1ea5u tr\u00fac s\u1ea3n ph\u1ea9m, \u0111\u00f3 l\u00e0 t\u01b0\u01a1ng lai c\u1ee7a axit cacbonic n\u1eb7ng M\u1ed9t quy tr\u00ecnh tr\u00ecnh di\u1ec5n t\u00edch h\u1ee3p cho s\u1ef1 ph\u00e1t tri\u1ec3n chi\u1ec1u s\u00e2u c\u1ee7a qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i v\u00e0 n\u00e2ng c\u1ea5p ng\u00e0nh c\u00f4ng nghi\u1ec7p canxi.<\/p>\n<h4>Bi\u1ebfn \u0111\u1ed5i canxi cacbonat n\u1eb7ng<\/h4>\n<p>C\u00e1c kho\u00e1ng ch\u1ea5t canxi cacbonat n\u1eb7ng ph\u00e2n ly trong qu\u00e1 tr\u00ecnh nghi\u1ec1n, v\u00e0 c\u00e1c h\u1ea1t kh\u00f4ng b\u00e3o h\u00f2a Ca<sup>2+<\/sup> v\u00e0 CO<sub>3<\/sub><sup>2-<\/sup> s\u1ebd ti\u1ebfp x\u00fac. C\u00e1c h\u1ea1t kh\u00f4ng b\u00e3o h\u00f2a s\u1ebd hy\u0111rat h\u00f3a v\u1edbi n\u01b0\u1edbc b\u1ec1 m\u1eb7t, l\u00e0m cho b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t canxi cacbonat n\u1eb7ng \u01b0a n\u01b0\u1edbc v\u00e0 k\u1ef5 n\u01b0\u1edbc. C\u00e1c \u0111i\u1ec3m ho\u1ea1t \u0111\u1ed9ng tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a canxi cacbonat n\u1eb7ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc nh\u1eb1m thay \u0111\u1ed5i c\u00e1c \u0111\u1eb7c t\u00ednh \u01b0a n\u01b0\u1edbc v\u00e0 k\u1ef5 n\u01b0\u1edbc c\u1ee7a n\u00f3.<\/p>\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1eeda \u0111\u1ed5i bao g\u1ed3m: s\u1eeda \u0111\u1ed5i l\u1edbp ph\u1ee7 v\u1eadt l\u00fd, s\u1eeda \u0111\u1ed5i l\u1eafng \u0111\u1ecdng b\u1ec1 m\u1eb7t, s\u1eeda \u0111\u1ed5i h\u00f3a h\u1ecdc b\u1ec1 m\u1eb7t (s\u1eeda \u0111\u1ed5i t\u00e1c nh\u00e2n gh\u00e9p n\u1ed1i, s\u1eeda \u0111\u1ed5i t\u00e1c nh\u00e2n gh\u00e9p h\u1ed7n h\u1ee3p, s\u1eeda \u0111\u1ed5i l\u1edbp ph\u1ee7 polyme, s\u1eeda \u0111\u1ed5i ch\u1ea5t h\u1eefu c\u01a1), s\u1eeda \u0111\u1ed5i c\u01a1 h\u1ecdc S\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t n\u0103ng l\u01b0\u1ee3ng cao (chi\u1ebfu x\u1ea1, plasma, si\u00eau \u00e2m).<\/p>\n<p>T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t, k\u00edch th\u01b0\u1edbc c\u1ee7a canxi cacbonat n\u1eb7ng bi\u1ebfn t\u00ednh c\u00f3 k\u00edch th\u01b0\u1edbc nano, xanh v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng, v\u00e0 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i canxi cacbonat bi\u1ebfn t\u00ednh th\u00e0nh lo\u1ea1i \u0111\u1eb7c bi\u1ec7t, lo\u1ea1i ch\u1ee9c n\u0103ng v\u00e0 lo\u1ea1i c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao l\u00e0 xu h\u01b0\u1edbng ph\u00e1t tri\u1ec3n c\u1ee7a canxi n\u1eb7ng S\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t.<\/p>\n<p>&nbsp;<\/p>\n<p>Ngu\u1ed3n b\u00e0i vi\u1ebft: China Powder Network<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Canxi cacbonat n\u1eb7ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat xay, ho\u1eb7c g\u1ecdi t\u1eaft l\u00e0 canxi n\u1eb7ng, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch ch\u1ebf bi\u1ebfn c\u00e1c kho\u00e1ng ch\u1ea5t cacbonat t\u1ef1 nhi\u00ean l\u00e0m nguy\u00ean li\u1ec7u th\u00f4. N\u00f3 c\u00f3 \u0111\u1ed9 tinh khi\u1ebft h\u00f3a h\u1ecdc cao, \u0111\u1ed9 tr\u01a1 cao, \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t, s\u1ebd kh\u00f4ng b\u1ecb ph\u00e2n h\u1ee7y d\u01b0\u1edbi 400 \u2103, \u0111\u1ed9 tr\u1eafng cao, h\u1ea5p th\u1ee5 d\u1ea7u th\u1ea5p, ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 th\u1ea5p, m\u1ec1m, kh\u00f4, kh\u00f4ng ch\u1ee9a n\u01b0\u1edbc tinh th\u1ec3, \u0111\u1ed9 c\u1ee9ng th\u1ea5p, gi\u00e1 tr\u1ecb m\u00e0i m\u00f2n th\u1ea5p, kh\u00f4ng \u0111\u1ed9c h\u1ea1i , Kh\u00f4ng v\u1ecb, kh\u00f4ng m\u00f9i, ph\u00e2n t\u00e1n t\u1ed1t v\u00e0 c\u00e1c \u01b0u \u0111i\u1ec3m kh\u00e1c.<\/p>\n","protected":false},"author":6,"featured_media":110165,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-110191","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/110191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=110191"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/110191\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/110165"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=110191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=110191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=110191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}