IMPROVING THE TECHNOLOGY FOR PROCESSING SUNGULITE-VERMICULITE CONGLOMERATES

• Main Authors: Anatoly I. Nizhegorodov, Alexey N. Gavrilin, Boris B. Moyzes
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2019-04-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: sungulite-vermiculite conglomerates; sungulite; vermiculite; pyroxene-olivine rock; thermo-activation; burning process; components separation; soaring speed; technological complex; «cold» re-preparation; heat energy
• Online Access: http://izvestiya.tpu.ru/archive/article/view/230/120
• ISSN: 2500-1019; 2413-1830

Relevance. The improved energy and resource-saving technology, implemented in new technological complexes with preliminary «cold» re-preparation, allows returning valuable raw material resources to industrial circulation and obtaining vermiculite and sugulite concentrates from mining waste accumulated in the Kovdor flogopit-vermiculite deposit. Therefore, this work is devoted to the issues of improving the processing of sungulite-vermiculite conglomerates. The aim of the research is to analyze the possibility of improving the technology for producing thermally activated sungulite and expanded vermiculite from mining wastes of the Kovdor phlogopite-vermiculite deposit and increasing its energy efficiency. The object of the research is the technological equipment for processing sungulite-vermiculite conglomerates, which implements energy- and resource-saving technology for producing activated sungulite and vermiculite concentrate. The methods are based on the experimental data and analysis of aerodynamic separation of vermiculite and sungulite from olivine-pyroxene rock and increase of allotment of sungulite in sungulite concentrate. The results prove the aim of the research is achieved. On their basis, it is possible to develop the improved technology for vermiculite producing, including expanded and magnesia-silicate reagent (thermoactivated sungulite) from mining industrial wastes with energy savings of up to 182 kJ/kg, which reduces energy consumption of their processing by 28 % compared to the previous technology. Besides, additional technological operations make it possible to obtain 350 kg of raw vermiculite, 68 kg of pure magnesia-silicate reagent with grain sizes of 2,4...3.5 mm and 158 kg of sungulite concentrate in a thermo-activated form with grains of 1,3...2,4 mm at almost 86 percent concentration. In general, we can conclude that the continuation of work in the field of development and improvement of technologies for processing sungulite-vermiculite conglomerates is promising.