RESEARCH OF IRON-CONTAINING CONCENTRATES OF BALKHASH DEPOSIT (KAZAKHSTAN) FOR PROCESSING OF LOW-GRADE COAL.
- Resource Type
- Article
- Authors
- Tulepov, Marat; Mansurov, Zulkhair; Sassykova, Larissa; Baiseitov, Dauren; Dalelhanuly, Orken; Ualiev, Zhomart; Gabdrashova, Sholpan; Kudyarova, Zhanar
- Source
- Journal of Chemical Technology & Metallurgy. 2019, Vol. 54 Issue 3, p531-538. 8p.
- Subject
- *LIGNITE
*COAL
*CATALYTIC hydrogenation
*COAL liquefaction
*CRYSTAL defects
*ORE deposits
- Language
- ISSN
- 1314-7471
The article describes processing of low-grade coal and catalytic hydrogenation of brown coal of Karazhira field (Kazakhstan). The highly dispersed iron-containing concentrates of Balkhash deposit (Kazakhstan) are studied as catalysts of the hydrogenation process in processing of sub-standard coal. The catalysts are prepared by mechanicchemical activation of the concentrate with subsequent dispergation in the coal in presence of polyethylene. It was found that use of an activated catalyst containing pyrite when coal hydrogenation in tetralin allowed to achieve practically complete decomposition of the organic mass of coal into liquid and gaseous products. Yield of maltens in presence of the activated catalyst was equal to 56.1% (by wt.). The results show that the effect of mechanic-chemical activation is caused not only increase in specific activity of the ore catalyst, but also probably change of catalytic properties of a surface. These changes can be apparently connected with the defects of crystal structure of a sample as a result of intensive mechanical influence. [ABSTRACT FROM AUTHOR]