PRODUCTION OF SPECIAL COKE FROM LOW-CAKING COALS USED IN THE FERROALLOY INDUSTRY

Abstract

This article draws attention to the importance of effective control of the composition and properties of the charge in the production of ferroalloys. The main focus is on carbon reducing agents, which play a key role in this process. The problem of the shortage of special coke in Kazakhstan is considered and solutions are proposed – the using of substandard raw materials for the production of reducing agents. In particular, the possibility of using coal from the Zhalyn deposit in a mixture with coal from the Shubarkol deposit is being considered. Researches of differential thermal analysis (DTA) of coals Shubarkol (100 %), Zhalyn (100 %), as well as in a mixture in a ratio of 50:50 % are presented. The detailed characteristic expressed by endothermic and exothermic peaks allows us to fully study the physico-chemical processes occurring as a result of thermal exposure. The conducted studies show that the obtained special coke in a ratio of 50:50% has good performance for reducing agents used in the electrothermy of ferroalloy production. In conclusion, it is emphasized that the use of coal fines helps to reduce the accumulation of coal «wastes», which has a positive effect on the environment. This shows the importance of further research in this area to optimize the ferroalloy production process. Keywords: coals, reducing agent, special coke, coke, production of ferroalloys, low-caking coals, non-caking coals, Zhalyn.