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  3. Volume 11, Number 4, 2017
  4. Thermodynamic analysis of obtaining ferroalloy from silicon-aluminum-containing silica clay

Thermodynamic analysis of obtaining ferroalloy from silicon-aluminum-containing silica clay

JCCT.
2017;
Volume 11, Number 4
: pp. 410–414
Received: June 13, 2016
Revised: August 28, 2016
Accepted: January 16, 2017
Authors:
  1. Danijel' Amanov
  2. Viktor Shevko
  3. Gul'nara Karatayeva
  4. Galimzhan Serzhanov
1
M. Auezov South Kazakhstan State University
2
M. Auezov South Kazakhstan State University
3
M. Auezov South Kazakhstan State University
4
M. Auezov South Kazakhstan State University

The article presents results of thermodynamic modeling of Fe-Si-Al complex containing alloy of the silica clay (77.8 % Al2O3, 11.6 % Al2O3). The modeling is based on the principle of minimum Gibbs energy and fulfilled by means of software complex HSC-5.1. It was found that the joint reduction of silicon and aluminum from an amorphous SiO2 and Al2O3 is characterized by higher thermodynamic probability than from a mixture of a crystalline SiO2 and Al2O3. At the silicon reduction there is the undesirable formation of a gaseous SiO; the transition degree of silicon in SiO can be reduced by means of decrease in temperature and increase in carbon content.

i-Al containing silica clay
thermodynamic modeling
carbothermic reduction
complex ferroalloy

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