Experimental and theoretical bases of energy and resource efficient process of extraction of valuable component from natural matrix ores

The material composition of nodule-type phosphorites is represented by the alpha-quartz ore rock of porous structure, phosphate matter with almost no pores, and admixture of layered aluminosilicates. As a result of sedimentary genesis of phosphate ores and matrix structure of alpha-quartz, its porous space is filled with the above components and their close mutual germination. The efficiency of known methods of phosphate ore beneficiation increases as the degree of their grinding increases and it is accompanied not only by the growth of energy consumption, but also by losses of fine fractions. The results of complex analysis of Bryansk phosphorite sample and, separated after completion of acid extraction of alpha-quartz, indicate the expediency of rational grinding of raw materials taking into account the technical characteristics of quartz sands used in the glass industry, which will provide energy and resource efficient processing. The revealed regularities of acid extraction of nodule-type phosphorite and mathematical processing of the data of the kinetic experiment indicate the possibility of using standard equipment of industrial schemes, with obtaining the main product - acid extract and the concomitant - alpha-quartz.