Abstract
The article is devoted to the problem of preparing high-quality coal raw materials and reducing the environmental burden in areas of coal use by reducing the amount of sulfur-containing emissions during metallurgical production.The negative impact exerted by enterprises of the coal and metallurgical industries on the biosphere is shown. The mechanism and nature of the effect of sulfur dioxide on human health are considered. The characteristic of sulfur-containing impurities of coals is given. It has been established that the removal of sulfur-containing impurities in coals at the stages preceding thermal processing is economically efficient and significantly reduces the environmental burden in areas of coal use. The methods of sulfur removal at the stages of field development are considered. The expediency of using physical, chemical and microbiological methods for effective desulfurization of coal raw materials has been established. The effectiveness of the use of both highly efficient flotation reagents and modifier reagents in the flotation enrichment of coals to reduce the sulfur content of coal concentrates is shown. The expediency of using the method of electrochemical desulfurization of coal in an aqueous medium under the influence of a glow discharge with the formation of active hydrogen peroxide capable of effectively oxidizing the pyrite component of sulfur has been established. The possibility of obtaining high-quality coal products by both wet and dry methods of high-gradient magnetic separation, which make it possible to effectively extract high-ash rock and sulfur compounds contained in it, is shown.
Keywords:
harmful emissions, high-sulfur coals, desulfurization, sulfur content, flotation, modifier reagents, high-gradient magnetic separation