Gypsum dehydration to Alpha-gypsum in mixed chloride solutions
Brno University of Technology solves in the long term the problem of alpha gypsum preparation by dehydrating the gypsum in the solution of chloride salts. This study verified that alpha-gypsum can be trouble free prepared by gypsum dehydration in solution of a number chloride salts, among others CaCl2, MgCl2 or NaCl. In the same time it was found that owing to the different electro-chemical behavior of Potassium ions, the by heat conditioned reaction of gypsum with the KCl solution the dehydration doesn抰 take place, but a partial substitution of Potassium ions by Calcium ions takes place. The product of this reaction is the mineral gageyit, K2SO4.5CaSO4.H2O.This important problem was solved by reduction of the extremely electrochemical high mobility of Potassium ions by the method of the mixed chloride solution with Potassium and Sodium ions, the mobility of which is in comparison with the preceding only one third. Samples of hemihydrate in the solution of mixed salts were prepared and tested in conclusion of the research. 1
alpha gypsum chloride solution gorgeyit hemihydrate
Karel Dvorak Marcela Fridrichova Dominik Gazdic
Brno university of technology, Veveri 95, 602 00 Brno, Czech Republic
国际会议
沈阳
英文
391-394
2011-11-22（万方平台首次上网日期，不代表论文的发表时间）