THE STUDYING OF PYRITE AND ARSENOPYRITE SPECIFIC SURFACE AND POROSITY AT ROASTING CONDITION

https://doi.org/10.48498/minmag.2023.2016.4.002

The paper presents the results of studying the modification of the specific surface area and porosity of pyrite and arsenopyrite during their thermal decomposition. It has been established that the decomposition of pyrite and arsenopyrite is accompanied by an increase in the pore volume from 0.303 10^-3 to 1.23 10^-3 with an increase in the degree of pyrite decomposition by about 41%, and then a decrease by about 0.131 10-3 m³/g. at a degree of decomposition of about 100%. The surface area of the pores increases from 0.31 to 1.085 m²/g with a subsequent decrease due to the coarsening and merging of small pores. An increase in porosity is accompanied by an increase in the aerodynamic resistance of particles resulting from increased dust formation of the furnace.

*T.A. Chepushtanova, D. Maratuly, K.K. Mamyrbayeva, M. Brajendra