Directions for the use of solid combustible carbon-containing mining waste

Abstract

The main problems associated with the accumulation, formation, storage and recycling of solid combustible carbon-containing waste of the mining industry, in particular, waste automobile tires, are presented. An analysis of the field of recycling automobile tires in Russia and abroad is made. Systems of preparation and obtaining commercial products from carbon-containing combustible wastes are studied. A rational technological scheme for obtaining activated carbon and rubber mixture plasticizer based on pyrolysis of carbon-containing waste is presented. The research of macrokinetic data such as process speed, product yield depending on process parameters, temperature, medium composition, raw material grinding degree is described, which allow understanding the essence of the pyrolysis process and are necessary for the calculation of technological apparatuses. The apparent activation energy value and the order of the total pyrolysis reaction are calculated. A mathematical model for describing the pyrolysis gas formation and transfer process has been created. The conducted research has made it possible to make a number of technological proposals, some of which have been patented. Organization structure was developed, technology selection was substantiated and efficiency of tire recycling complexes was assessed. A business plan for recycling depreciated automobile tires with capacity of 15 thousand tons per year in raw materials is created. It has been proved that the end products obtained by pyrolysis of rubber-containing waste are cheaper and in some respects of their quality characteristics exceed the quality of analogues made of primary natural raw materials.