![\"\"](\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2022\/11\/micro-silica-fume.jpeg\")
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Kh\u00f3i microsilica l\u00e0 b\u1ee5i \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1edfi kh\u00ed Si v\u00e0 SiO \u0111\u01b0\u1ee3c t\u1ea1o ra trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t h\u1ee3p kim ferrosilicon v\u00e0 silic kim lo\u1ea1i trong l\u00f2 h\u1ed3 quang ch\u00ecm, \u0111\u01b0\u1ee3c oxy h\u00f3a b\u1eb1ng kh\u00f4ng kh\u00ed trong \u1ed1ng kh\u00f3i v\u00e0 ng\u01b0ng t\u1ee5 nhanh ch\u00f3ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kh\u00f3i silica (ho\u1eb7c silica ng\u01b0ng t\u1ee5). b\u1ed1c kh\u00f3i). V\u1edbi vi\u1ec7c t\u0103ng c\u01b0\u1eddng b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng, s\u1ea3n l\u01b0\u1ee3ng kh\u00f3i silicon<\/a> vi m\u00f4 \u0111ang t\u0103ng l\u00ean h\u00e0ng n\u0103m. N\u1ebfu x\u1ea3 tr\u1ef1c ti\u1ebfp ho\u1eb7c ch\u00f4n l\u1ea5p s\u1ebd g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng, l\u00e3ng ph\u00ed t\u00e0i nguy\u00ean. Do \u0111\u00f3, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 khai th\u00e1c v\u00e0 s\u1eed d\u1ee5ng l\u01b0\u1ee3ng kh\u00f3i silic si\u00eau nh\u1ecf kh\u1ed5ng l\u1ed3 n\u00e0y \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u1ea5p b\u00e1ch \u0111\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p luy\u1ec7n ferrosilicon. V\u1ea5n \u0111\u1ec1.<\/p>\n Microsilica fume l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m ph\u1ee5 c\u1ee7a qu\u00e1 tr\u00ecnh n\u1ea5u ch\u1ea3y ferrosilicon v\u00e0 silic kim lo\u1ea1i. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c vi\u00ean luy\u1ec7n kim, b\u00ea t\u00f4ng \u0111\u1eb7c bi\u1ec7t, xi m\u0103ng \u0111\u1eb7c bi\u1ec7t, v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda, s\u1ea3n ph\u1ea9m h\u00f3a h\u1ecdc v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c do t\u00ednh ch\u1ea5t tuy\u1ec7t v\u1eddi v\u00e0 k\u1ef3 di\u1ec7u c\u1ee7a n\u00f3.<\/p>\n 1. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a kh\u00f3i silic<\/p>\n Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc ch\u00ednh c\u1ee7a kh\u00f3i microsilica l\u00e0 SiO2, trong \u0111\u00f3 SiO2 ch\u1ee7 y\u1ebfu t\u1ed3n t\u1ea1i \u1edf pha kh\u00f4ng k\u1ebft tinh (hay SiO2 v\u00f4 \u0111\u1ecbnh h\u00ecnh), h\u00e0m l\u01b0\u1ee3ng \u226580%, \u00edt th\u00e0nh ph\u1ea7n t\u1ea1p ch\u1ea5t, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang 20-28\u33a1\/ g, v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf h\u01a1n 10\u03bcm chi\u1ebfm h\u01a1n 80%, n\u00f3 c\u00f3 ho\u1ea1t t\u00ednh h\u00f3a h\u1ecdc cao, d\u1ec5 ph\u1ea3n \u1ee9ng v\u1edbi ki\u1ec1m v\u00e0 c\u00f3 \u0111\u1eb7c t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9, \u0111\u1ed9 kh\u00fac x\u1ea1 cao v\u00e0 ho\u1ea1t t\u00ednh m\u1ea1nh. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong x\u00e2y d\u1ef1ng, v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda, luy\u1ec7n kim, g\u1ed1m s\u1ee9, c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c.<\/p>\n 2. S\u1ef1 nguy hi\u1ec3m c\u1ee7a kh\u00f3i silic<\/p>\n B\u1ee5i microsilica l\u00e0 m\u1ed9t lo\u1ea1i h\u1ea1t m\u1ecbn, nh\u1eb9 v\u00e0 d\u1ec5 bay h\u01a1i. N\u1ebfu x\u1ea3 tr\u1ef1c ti\u1ebfp s\u1ebd t\u1ea1o th\u00e0nh b\u1ee5i kh\u00f3 l\u1eafng. 3. S\u1eed d\u1ee5ng kh\u00f3i micro-silica<\/a> c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao<\/p>\n N\u00f3i chung, lo\u1ea1i SiO2 trong kh\u00f3i silic c\u00e0ng cao th\u00ec gi\u00e1 tr\u1ecb gia t\u0103ng c\u1ee7a n\u00f3 c\u00e0ng cao.<\/p>\n (1) D\u00f9ng trong ng\u00e0nh b\u00ea t\u00f4ng<\/p>\n B\u00ea t\u00f4ng tr\u1ed9n v\u1edbi silica<\/a> fume c\u00f3 \u0111\u1eb7c t\u00ednh c\u01b0\u1eddng \u0111\u1ed9 cao, hi\u1ec7u su\u1ea5t b\u00e1m d\u00ednh v\u00e0 g\u1eafn k\u1ebft t\u1ed1t, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 t\u0103ng \u0111\u1ed9 d\u00e0y c\u1ee7a khu\u00f4n. Trong c\u00e1c d\u1ef1 \u00e1n b\u1ea3o t\u1ed3n n\u01b0\u1edbc v\u00e0 th\u1ee7y \u0111i\u1ec7n nh\u01b0 c\u1ea7u nh\u1ecbp d\u00e0i v\u00e0 d\u00e0n khoan d\u1ea7u ngo\u00e0i kh\u01a1i, b\u00ea t\u00f4ng pha t\u1ea1p kh\u00f3i micro-silica<\/a> c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng th\u1ea5m, ch\u1ed1ng \u0103n m\u00f2n v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n. Trong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng \u0111\u01b0\u1eddng, kh\u00f3i micro-silica<\/a> c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 ban \u0111\u1ea7u v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n c\u1ee7a b\u00ea t\u00f4ng.<\/p>\n (2) L\u00e0m ph\u1ee5 gia xi m\u0103ng<\/p>\n Microsilica fume \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u ph\u1ed1i tr\u1ed9n \u0111\u1ec3 s\u1ea3n xu\u1ea5t xi m\u0103ng \u0111\u1eb7c bi\u1ec7t. Xi m\u0103ng \u0111\u1eb7c bi\u1ec7t tr\u1ed9n v\u1edbi kh\u00f3i silic c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o th\u00e0nh b\u00ea t\u00f4ng \u0111\u1eb7c c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 g\u1ea5p 2 ~ 3 l\u1ea7n b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t, ch\u1ed1ng \u0103n m\u00f2n, kh\u00f4ng th\u1ea5m n\u01b0\u1edbc, c\u00e1ch nhi\u1ec7t, ch\u1ed1ng b\u0103ng gi\u00e1 v\u00e0 ch\u1ed1ng l\u1ea1i c\u00e1c ion clorua. hi\u1ec7u su\u1ea5t ch\u1eb7n, v.v.<\/p>\n (3) \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda<\/p>\n B\u1ee5i silic si\u00eau nh\u1ecf c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh tuy\u1ec7t v\u1eddi nh\u01b0 \u0111\u1ed9 kh\u00fac x\u1ea1 cao v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda. N\u00f3 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chu\u1ea9n b\u1ecb g\u1ed1m s\u1ee9 nhi\u1ec7t \u0111\u1ed9 cao, v\u1eadt li\u1ec7u mu\u00f4i, v\u1eadt li\u1ec7u ch\u1ecbu m\u00e0i m\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 cao, g\u1ea1ch tho\u00e1ng kh\u00ed v\u00e0 v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda.<\/p>\n (4) Vi\u00ean n\u00e9n luy\u1ec7n kim<\/p>\n Trong ng\u00e0nh luy\u1ec7n kim, h\u1ea7u h\u1ebft c\u00e1c doanh nghi\u1ec7p \u0111\u1ec1u s\u1eed d\u1ee5ng kh\u00f3i silicon<\/a> si\u00eau nh\u1ecf l\u00e0m nguy\u00ean li\u1ec7u ho\u00e0n tr\u1ea3. S\u1eed d\u1ee5ng c\u00e1c vi\u00ean h\u1ed7n h\u1ee3p kh\u00f3i silica v\u00e0 micro-silica l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ec3 kh\u1eed l\u00f2 \u0111i\u1ec7n v\u00e0 n\u1ea5u ch\u1ea3y silicon<\/a> c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 thu h\u1ed3i silicon b\u00ecnh th\u01b0\u1eddng v\u00e0 ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ed5i tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb s\u1ea3n ph\u1ea9m. L\u00e0m \u01b0\u1edbt silica<\/a> fume b\u1eb1ng n\u01b0\u1edbc v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t vi\u00ean nh\u1ecf \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t vi\u00ean kho\u1ea3ng 4cm, c\u00f3 th\u1ec3 gi\u1ea3m tr\u1ef1c ti\u1ebfp v\u00e0 n\u1ea5u ch\u1ea3y trong l\u00f2 \u0111i\u1ec7n m\u00e0 kh\u00f4ng c\u1ea7n rang ho\u1eb7c s\u1ea5y kh\u00f4. C\u00e1c vi\u00ean c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u00eau k\u1ebft \u1edf nhi\u1ec7t \u0111\u1ed9 cao, kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 nh\u01b0 v\u1ee1 trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft v\u00e0 qu\u1eb7ng thi\u00eau k\u1ebft s\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ed9 b\u1ec1n cao.<\/p>\n (5) \u0110i\u1ec1u ch\u1ebf nano-silica<\/a> (nano-SiO2)<\/p>\n (6) \u0110i\u1ec1u ch\u1ebf silic kim lo\u1ea1i<\/p>\n (7) Chu\u1ea9n b\u1ecb ch\u1ea5t h\u1ea5p ph\u1ee5 hi\u1ec7u su\u1ea5t cao<\/p>\n (8) Chu\u1ea9n b\u1ecb v\u1eadt li\u1ec7u gel<\/p>\n V\u00ec kh\u00f3i microsilica c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nung \u1edf nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c h\u00f2a tan trong ki\u1ec1m \u0111\u1ec3 chu\u1ea9n b\u1ecb th\u1ee7y tinh, n\u00ean b\u1ea5t k\u1ec3 kh\u00f3i microsilica hay th\u1ee7y tinh n\u01b0\u1edbc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ngu\u1ed3n silicon<\/a> \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf aerogel silica, vi\u1ec7c s\u1eed d\u1ee5ng micro-silica \u0111\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao kh\u00f3i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. Silica<\/a> aerogel \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf t\u1eeb kh\u00f3i silic c\u00f3 \u0111\u1ed9 x\u1ed1p cao, \u0111\u1ed9 b\u1ec1n cao, m\u1eadt \u0111\u1ed9 th\u1ea5p, hi\u1ec7u su\u1ea5t c\u00e1ch nhi\u1ec7t t\u1ed1t v\u00e0 \u0111\u1eb7c t\u00ednh kh\u00f4ng \u0111\u1ed9c h\u1ea1i. N\u00f3 d\u1ef1 ki\u1ebfn \u200b\u200bs\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, x\u00e2y d\u1ef1ng, y h\u1ecdc v\u00e0 c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c.<\/p>\n","protected":false},"excerpt":{"rendered":" Kh\u00f3i microsilica l\u00e0 b\u1ee5i \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1edfi kh\u00ed Si v\u00e0 SiO \u0111\u01b0\u1ee3c t\u1ea1o ra trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t h\u1ee3p kim ferrosilicon v\u00e0 silic kim lo\u1ea1i trong l\u00f2 h\u1ed3 quang ch\u00ecm, \u0111\u01b0\u1ee3c oxy h\u00f3a b\u1eb1ng kh\u00f4ng kh\u00ed trong \u1ed1ng kh\u00f3i v\u00e0 ng\u01b0ng t\u1ee5 nhanh ch\u00f3ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kh\u00f3i silica (ho\u1eb7c silica ng\u01b0ng t\u1ee5). b\u1ed1c kh\u00f3i).<\/p>\n","protected":false},"author":7,"featured_media":121750,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-121795","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\/121795","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=121795"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/121795\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/121750"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=121795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=121795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=121795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nBay l\u01a1 l\u1eedng trong kh\u00f4ng kh\u00ed, \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn s\u1ee9c kh\u1ecfe con ng\u01b0\u1eddi v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh. C\u00e1c h\u1ea1t b\u1ee5i microsilica c\u00f3 th\u1ec3 tr\u1ef1c ti\u1ebfp x\u00e2m nh\u1eadp v\u00e0o ph\u1ed5i sau khi c\u01a1 th\u1ec3 con ng\u01b0\u1eddi h\u00edt ph\u1ea3i, g\u00e2y ung th\u01b0 ph\u1ed5i v\u00e0 c\u00e1c b\u1ec7nh b\u1ee5i kh\u00e1c.<\/p>\n