The Pilot-scale Ezperiment on the Compositive Utilization of Asbestos Tailing
The main chemical components of asbestos tailing are MgO and SiO2.Its a efficient method to produce the precipitated amorphous silica and magnesium hydroxide from asbestos tailing. In this paper, the author reported the research work about the pilot scale experiment of the preparation of nanoscale precipitated amorphous silica and nano-Mg (OH)2 powder from asbestos tailing. The processing is mainly including the treatments of acid leaching of the asbestos tailing, alkali leaching of the acid leaching residue, preparations of the precipitated amorphous silica, purification of the acid leachate, the precipitation of nano-Mg (OH)2.The samples is obtained successfully those of nano-precipitated amorphous silica with a spheroid-shape and nanomagnesium hydrate with a plate-shape. The results shown that 140.6kg magnesium hydroxide and 93. 6kg precipitated amorphous silica is obtained per 300kg asbestos tailing. The MgO recovery ratio of asbestos tailing is 82.02%, that of SiO2 is 68. 90%. The consumption of each raw material of 100kg asbestos tailing are: 31% Chlorhydric Acid 392kg, Perhydrol (30%) 3.45kg, NaOH (commercial grade) 98kg, Sulphuric acid (93%) 14kg, Coupling Agent of Organic Titanate (YB-502) 0.7kg, Triton X-100 (OP-10) 1.56kg. Though there need to do more researches on the waste water and waste solid producing during this processing, this craft still has some evident economic and social benefits.
asbestos tailing serpentine magnesium hydrozide precipitated amorphous silica pilot scale ezperiment
Du Gaoxiang Zheng Shuilin Ding Hao Yuan Yuan
Department of Material Science and Technology, China University of Geosciences (Beijing) , Beijing 1 Department of Chemistry and Environmental Technology, China University of mining industry (Beijing)
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
224-229
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）