Abstract

 
 
 
 The process of obtaining a powder ferrosilicochromic alloy by the method of silicothermic reduction of local chromites and slags of copper smelters was investigated. The mechanism of this process has been studied. It is established that the best results are obtained in the case of slag / chromite ratio = 1: 1, when an alloy with microdispersed structure and high strength is obtained. The optimum composition of the resulting alloy is as follows: 35,1% Fe; 36,35% Si and 28,53% Cr, with a metal yield of 98,4%. The obtained alloy powder can be used as an acidified and alloying additive to chromium- and silicon-containing stainless composite materials. The aspects of the process for obtaining FeSiCr alloy have been developed. The maximum temperature (Tc) and the linear propagation velocity of the combustion wave (Uv) are determined graphically. The mechanism of the formation of FeSiCr in the SHS process is explained.
 
 
 
Highlights
Armenia has a powerful mien base for organizing the production of chromecontaining ferroalloys and silicium from the local raw materials [1]
The process of obtaining ferrosilicochromium combined with local chromites and waste products is studied by the out-of-furnace silicothermic reduction method
Obtaining valuable ferrosilicochromium by alloying additives from local chromites and secondary raw material by an advanced and efficient technology characterizes the importance of the presented work
Summary
Armenia has a powerful mien base for organizing the production of chromecontaining ferroalloys and silicium from the local raw materials [1]. In recent years, finding new chromite mine in Tapasar of the Sevan region with a 43...46% Cr2O3 content aroused a great interest [2,3,4] This deposit has not yet found industrial applications because of the absence of processing technologies. The economically effective and advanced method for obtaining alloys is the silicothermal method, which does not require great power consumption as it does at exothermic reduction reaction. It allows to provide the out-of furnace process which is the prevailing factor for the given technology [7, 8, 13]. Obtaining valuable ferrosilicochromium by alloying additives from local chromites and secondary raw material by an advanced and efficient technology characterizes the importance of the presented work
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