Research and development of a comprehensive technology for processing kaolinite clays in Kazakhstan

Abstract

In the Republic of Kazakhstan, the most promising are kaolinite clays of the Alekseevsky deposit. For effective processing of clays, it is necessary to develop special methods of processing, since satisfactory results were not achieved when using standard methods of gravity processing. The article provides the results of studies of the effect of preliminary chemical activation on the yield of the kaolinite fraction during gravitational processing. Previously, the method of preliminary chemical activation of raw materials in a solution of sodium bicarbonate has proven itself well in the processing of various mineral raw materials. It is determined that as a result of preliminary chemical activation, changes in the phase composition occurred. The dependence of the yield of the kaolinite fraction on the temperature of chemical activation, duration, and the ratio of W:T and the concentration of the sodium bicarbonate solution. Based on the results obtained, a technology for the complex processing of kaolinite clays has been developed, which provides for the preliminary chemical activation of the feedstock at the beginning of the process, which will effectively isolate high-quality kaolinite and quartz products, which will significantly reduce the flow of materials entering for sintering. As a result of activation, the phase composition of the kaolinite fraction has changed: the percentage of the kaolinite fraction has decreased; new phases of muscovite and sodium aluminosilicate appeared; the amount of quartz increased.

Development of Technology for Processing Pyrite Cinder to Produce Non-Ferrous Metal Concentrate

“…The influence of preliminary chemical activation of pyrite cinders on extraction of non-ferrous metals and iron at leaching in sulfuric acid solutions was studied. Methods of hydrometallurgical processing of pyrite cinders using weakly acidic sulfuric acid solutions for leaching are known [18][19][20][21][22]. The disadvantage of the methods is the low extraction of non-ferrous metals.…”