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Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

Science China(Technological Sciences) 2009年第1期52卷 204-209页

作者： DU GaoXiang1,3, ZHENG ShuiLin2.& DING Hao1 1 School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, 100083, China 2.School of Chemical and Environment Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China 3..ebei qinghe refractory group co. ltd., xingtai 054804, China 1. School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 China 3. Hebei qinghe {2. {2. co. ltd. Xingtai 054804 China 2. School of Chemical and Environment Engineering China University of Mining and Technology (Beijing) Beijing 100083 China

Silica is the major co.ponent of the acid leaching residue of asbestos tailing. The waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous solution. co.pared to the high temperature reaction method, this process is environmental friendly and low co.t. In this paper, the reaction process of the residue and the sodium hydroxide aqueous solution is optimized. The optimum reaction process parameters are as follows: the usage of sodium hydroxide is 2..4 g/100 g acid leaching residue, the reaction temperature is 90℃, the reaction time is 1 h, and the ratio of the liquid/solid is 2.0. The significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide > the ratio of the liquid/solid > the reaction time > the reaction temperature. The significance sequence to the leaching ratio of SiO2.is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. The significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. Under the optimum co.ditions, the leaching ratio of the SiO2.is 77.5%, and the modulus of the sodium silicate is 3.15. The XRD analysis result indicates that the major co.ponents of the alkali leaching residue are serpentine, talc, quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization

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Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

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中国科学:技术科学 2010年第4期 462-462页

Silica is the major co.ponent of the acid leaching residue of asbestos *** waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous *** to the high temperature reaction method,this process is environmental friendly and low *** this paper,the reaction process of the residue and the sodium hydroxide aqueous solution is *** optimum reaction process parameters are as follows:the usage of sodium hydroxide is 2..4 g/100 g acid leaching residue,the reaction temperature is 90℃,the reaction time is 1 h,and the ratio of the liquid/solid is *** significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide>the ratio of the liquid/solid>the reaction time>the reaction *** significance sequence to the leaching ratio of SiO2.is the ratio of the liquid/solid>the usage of sodium hydroxide>the reaction time>the reaction *** significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid>the usage of sodium hydroxide>the reaction time>the reaction *** the optimum co.ditions,the leaching ratio of the SiO2.is 77.5%,and the modulus of the sodium silicate is *** XRD analysis result indicates that the major co.ponents of the alkali leaching residue are serpentine,talc,quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization

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