•  
  •  
 

Abstract

This article provides information on the formation of substances resulting from the roasting of sulfide-zinc concentrates, which negatively affects the course of subsequent stages. The resulting calcine was sent for reduction roasting in a weakly reducing inert gas atmosphere. Based on this, it can be assumed that the impact on the calcine of "weak" energetic inert gases the reduce minimises or formation of ferrites and zinc silicates. Since the principal primary using agent is gaseous H2, (hydrogen) in a mixture of gases with a weak reducing environment, all redox reactions occurring in total reduction were studied. The course of chemical reactions of hydrogen at high temperatures of oxides is considered. The normative thermodynamic values of reagents are determined accord particular to exceptional standards for certain thermodynamic analyses of substances with hydrogen. Research results show that zinc ferrites and silicates can be significantly reduced by reduction in an atmosphere of weak reducing gases. This, in turn, leads to a decrease in the formation of the numbert of cakes fonumberuring the hydrometallurgical leaching of the calcine, and an increase n the zinc concentration in the solution.

First Page

4

Last Page

10

References

  1. B.T. Berdiyarov, A.S. Khasanov. Current state and prospects for improving the process of leaching zinc curds. “Technical science and innovation”, 2021. 213.
  2. R.E. Toshkodirova., S. Abdurakhmonov. B.T. Berdiyarov. Research on electromagnetic clinker cleaning. “Technical science and innovation”, 2021. 68.
  3. B.T. Berdiyarov, A.S. Khasanov, J.B. Ismailov, «Invesigation of solid-phase reactions occurring during the firing of charge components». “Technical science and innovation”, 2021. 130.
  4. B.T. Berdiyarov. Analysis of the possibility of increasing the degree of zink waelz and reducing metal losses during waelz. “Technical science and innovation”, 2021. 117.
  5. A.S. Khasonov., B.T. Berdiyarov. Research of education and prevention of ferrite and silicates of zinc when roasting sulphidic zinc concentrates in furnaces of the boiling layer. Austria. “European science review”, 2018. 62.
  6. G.A. Kokayeva., N.M. Komkov. Study of the roasting process of low-grade syncosulfide concentrates. Proceedings of the international scientific and practical conference. “Education and science without borders”, 2008. 47.
  7. J. Piere., S C. Bouffard., J.R Orace. Agglomeration zinc calcine during die fluid-bed roasting. “Mineral engineering”, 2011. 1409.
  8. B.T. Berdiyarov., A.A. Yusupkhodjayev., A.S. Khasanov. Improvement of technology of heat treatment of the zinc conccnu ate for the purpose of increase in complexity of use of raw materials. “International journal of advanced research in science, engineering, and technology”, 2019.
  9. W.A. Muns., S.A. Ivakina., D.B. Choinzonov. The study of the kinetics of oxidation of sulfide synca concentrate in a fluidized bed furnace. “Bulletin of SUSU. Series energy”, 2017. 34.
  10. T.T. Chen, J.E. Dutrizac. Mineralogical changes occur during the fluid-bed roasting if zinc sulfide concentrates. “Metals and mater”, 2004. 46.
  11. A.S. Kumar., D. Hodder. “Overcoming challenges of running jumbo size zinc roasters with finer zinc concentrate”, 2010. 333.
  12. K. Svens., B. Kerstiens., M. Runkel. “Recent experiences with modern zinc processing technology”, 2003. 94.
  13. B.T. Berdiyarov., S.T. Matkarimov. Influence of calcium oxide on synco ferritization. “International scientific and technical conference”, 2016. 84.
  14. M.M. Yakubov., A.S. Khasanov., B.T. Berdiyarov., S.R. Khudoyarov. Methods for preventing the formation of silicates and ferrites during the firing of sulfide zinc. “Compositional materials”, 2018. 4.
  15. B. T. Berdiyarov, A. S. Khasanov, Zh. B. Ismoilov, and Sh. Proceedings of the II-Republican scientific and practical conference with the participation of foreign scientists “Innovative developments and prospects for the development of chemical technology of silicate materials”, 2022. 434.
  16. B.T. Berdiyarov., J.B. Ismailov. Restoration of zinc burns in the atmosphere of weak renewable gas atmosphere. International scientific and scientific-technical conference. “Resource and energy-saving innovative technologies in the field of foundry”, 2022. 209.

Download

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.