文章基本信息

标题：The high-temperature volatilization of sylvite and solid reaction process between sylvite and minerals
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作者：Liu Ji ; Liu Ji
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：5
页码：052003
DOI：10.1088/1755-1315/233/5/052003
出版社：IOP Publishing
摘要：The effects of volatilization of sylvite were investigated when the mineral was added in it and the reaction mechanism of solid phase between potassium and minerals such as CaCO₃, SiO₂, Al₂O₃, Fe₂O₃ were conducted at the same time by means of high temperature calcination, thermal analysis and XRD analysis. Results show that four kinds of mineral components can restrain the volatilization of potassium in different extents, KCl and K₂SO₄ are relatively stable at high temperatures, which can only react with Al₂O₃ to produce KAl₅O₈; K2CO₃ is the most active, and it can not only react with CaCO₃ to produce K₂Ca(CO₃)₂ in low temperature but also decompose to K₂O that co-melt with SiO₂, which can also react with Al₂O₃ or Fe₂O₃ to form stable and high melting point KAlO₂ and KFeO₂ respectively.