Research of metallurgical properties of high-ash coal for the production of ferro-alloys

S.T. Gabdullin; S. Beisenov; E.J. Shabanov; R.T. Tоlеukadyr; D.R. Muzdybaev

doi:10.31643/2018/6445.28

Authors

S.T. Gabdullin Chemical and metallurgical institute. Zh.Abishev
S. Beisenov Chemical and metallurgical institute Zh.Abishev
E.J. Shabanov Chemical and metallurgical institute Zh.Abishev
R.T. Tоlеukadyr Chemical and metallurgical institute Zh.Abishev
D.R. Muzdybaev Chemical and metallurgical institute Zh. Abishev

DOI:

https://doi.org/10.31643/2018/6445.28

Keywords:

high-ash coal, reducing agent, ferroalloy, semi-coke, specific electrical resistivity, strength.

Abstract

In laboratory conditions researches on studying of metallurgical properties of high-ash reducing agents on the example of stone coals of the Borly Deposit are carried out. Physical and chemical characteristics of the studied coals are determined: strength, density, porosity, electrical resistivity and reactivity. A comparative analysis of the properties of coal with known reducing agents of ferroalloy production: Magnitogorsk and Chinese cokes, Angarsk and Leninsk-Kuznetsk semi-coxes. It was found that the studied coals have high values of electrical resistivity and reactivity, providing intensive reduction of oxides of charge materials, as well as contributing to a more complete use of the furnace power. Indications of mechanical strength test coal meet the requirements for carbon-containing raw materials used for the production of ferroalloys according are 50-60%. The main strength characteristic of carbon reducing agents used in the Ferroalloy industry is their structural strength, the values of which should be within 45-55% according. The structural strength of the coal under study is quite high and is 81.35 % and close in value to the Magnitogorsk coke 87.5 %. Indicators of reactivity is of 8.61 ml/g∙s and comparable with the values of Leninsk-Kuznetsk of 8.02 ml/g∙s and the Angarsk 9,80 ml/g∙ s semi-coxes. In general, the metallurgical properties of high-ash Borlin coals are within acceptable limits and fully meet the requirements for reducing agents used in the production of ferroalloys.

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Author Biographies

S.T. Gabdullin, Chemical and metallurgical institute. Zh.Abishev

С.e.s., leading researcher, Laboratory of ferro-alloys and recovery processes of Chemical-metallurgical Institute, Zh. Abisheva, Karaganda.

S. Beisenov, Chemical and metallurgical institute Zh.Abishev

D.e.s, Professor. director, head of laboratory, Laboratory of Metallurgical Alloys of the Institute of Chemistry and Metallurgy named after Abishev, Karaganda.

E.J. Shabanov, Chemical and metallurgical institute Zh.Abishev

PhD, director, head of laboratory, Laboratory of ferro-alloys and recovery processes of Chemical-metallurgical Institute. Zh. Abisheva, Karaganda.

R.T. Tоlеukadyr, Chemical and metallurgical institute Zh.Abishev

Engineer 2 categories, Laboratory of ferro-alloys and recovery processes of Chemical-metallurgical Institute. Zh. Abisheva, Karaganda.

D.R. Muzdybaev, Chemical and metallurgical institute Zh. Abishev

Engineer 2 categories, Laboratory of ferro-alloys and recovery processes of Chemical-metallurgical Institute Zh. Abisheva, Karaganda.

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