Recovery of silica from sodium silicate solution of calcined boron mud
查看参考文献18篇
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文摘
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The effect of several parameters on the recovery of silicon dioxide from calcined boron mud (CBM) such as stirring speed, temperature, sodium silicate concentration, and carbonation time was studied. The recovery of silicon dioxide is 88 % when the stirring speed is 450 r·min~(-1), temperature is 60 °C, sodium silicate concentration is 1 mol·L~(-1), and the carbonation time is 6 h. The effect of carbonation time on the recovery of silicon dioxide is divided into three kinetic regimes, and the carbonation process of sodium silicate solution follows a second-order reaction based on the double-film theory model. The apparent rate constant of the three kinetic regimes is 0.064, 3.178, and 1.130 L·h·mol~(-1), respectively. The amorphous SiO_2 products obtained by carbonating the purified solution have 99.6 % purity and are spherical with diameters of about 100 nm. |
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来源
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Rare Metals
,2016,35(2):204-210 【核心库】
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DOI
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10.1007/s12598-015-0654-7
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关键词
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Boron mud
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Carbonation
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Recovery
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Silicon dioxide
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地址
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School of Materials and Metallurgy, Northeastern University, Shenyang, 110819
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1001-0521 |
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学科
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冶金工业 |
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基金
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国家自然科学基金
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the Fundamental Research Funds for the Central Universities, China
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文献收藏号
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CSCD:5623481
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