Dump Sludge From Alumina Production Study

Abstract

"The paper explores the possibility of involving in the processing of waste sludge from alumina production and ash and slag from thermal power plants of Aluminum of Kazakhstan JSC for the production of building products. Alumina production in the Republic of Kazakhstan is concentrated in Aluminum of Kazakhstan JSC and is characterized by a large amount of waste sludge and ash and slag generated by Pavlodar TPP-1, which is part of the structure of the enterprise. In the work, studies were carried out to obtain concrete mixtures consisting of alumina production sludge within 25–45 %, ash and slag from thermal power plants within 31–45 %, lime within 5–15 %, water 10–23 %. Waste sludge in the composition of concrete served as a component of a mixed binder and hydraulically active filler, ash and slag – the role of mineral aluminosilicate additives in the composition of a mixed binder, lime – the role of hardening activators of a mixed binder. In the course of the conducted experimental studies, it was found that mixture No. 1, including 25 % of alumina production dump sludge, 38 % of ash and slag TPP, 15 % quicklime and 22 % water."