矿产保护与利用Issue(4)：69-72,4.DOI:10.13779/j.cnki.issn1001-0076.2017.04.015
钙芒硝矿石的水浸工艺研究
Research on Water Leaching Process of Glauberite Ore
摘要
Abstract
A considerable amount of glauberite ore was discharged and piled on the land when it was mined by solution mining in tunnel cavern, which might gave rise to water-soil pollution and secondary geological disaster.Therefore, water leaching research on glauberite ore was implemented.The optimum leaching parameters were determined as follows: the ore grain size was-0.9 mm, the ratio of liquid to solid was 1.5∶1, the leaching temperature was 50 ℃, and the leaching time was 1 h.Furthermore, a two-stage countercurrent leaching process was proposed.The concentration of Na2SO4 in the leaching solution was increased by 26％ to 262 g/L with the leaching efficiency of more than 98％, and the leaching solution could be directly exported to produce sodium sulfate.The content of CaSO4·2H2O in the leaching slag was 70.34％, and the alkali content (Na2O + 0.658 K2O) was 0.51％, meeting the requirements of the alkali content no more than 0.60％ of GB 175-2007 General Portland cement.The leaching slag could be used as raw material for cement.The leaching process proposed in this paper could recover sodium sulfate and also utilize the leaching residue, which lay the foundation for the comprehensive utilization of the glauberite ore.关键词
钙芒硝/水浸/二段逆流浸出/元明粉Key words
glauberite/water leaching/two stage countercurrent leaching/sodium sulfate分类
矿业与冶金引用本文复制引用
张秀峰,谭秀民,张利珍..钙芒硝矿石的水浸工艺研究[J].矿产保护与利用,2017,(4):69-72,4.基金项目
中国地质调查局地质调查项目(DD20160073) （DD20160073）
