Track: Waste
Abstract
One of the ways to solve the problem of environmental protection in the fuel and energy and metallurgical sectors of the economy is the introduction of new complex technological processes, which can be implemented by the principle of energy-chemical-technological processing of carbon raw materials. It involves the extraction of valuable chemical components in the form of coke oven gas (combustion heat ~ 17700 kJ / m3), benzene hydrocarbons, hydrogen sulfide, coal tar, ammonia and other chemical compounds, as well as the production of solid product with new consumer properties.
A technology for the production of smokeless solid fuel from a mixture of gas coal (80%) and coal wastes (20%) has been developed. This technology uses the traditional coking layer in coke ovens. Comparative studies of the dynamics and kinetics of combustion of smokeless solid fuels and different types of energy coal have been carried out in this research experience. The dependence of the rate of interaction of coke residues of anthracite, highly metamorphosed coal (Vdaf = 11.1%), low-metamorphosed coal (Vdaf = 41.6%) and smokeless solid fuel (Vdaf = 2.7%) with oxygen of air was obtained. The characteristics of anthracite, high-metamorphosed coal, low-metamorphosed coal and smokeless solid fuel combustion dynamics are obtained, which allow further determination of the reactivity of the carbonaceous substance of the fuel. The studied properties of smokeless solid fuel confirm the possibility of its use as a reducing agent for ferroalloys.
The technology of production of smokeless carbon fuel, which is energy-chemical-technological processing of coal, has been developed. The result of the processing is lumpy carbon fuel, which has a uniform solid structure, high combustion heat and mechanical strength, high reactivity, high speed and complete combustion of the fuel particles. Technology offers the opportunity to use carbon wastes and improve environmental performance. Smokeless lumpy carbon fuel has several advantages over other types of fuel: combustion of fuel particles in high-temperature zones - more than 8000 C transform combustion to a phase close to exterior diffusion. According to the results of industrial experiments, the optimal quality indicators of smokeless solid fuels recommended for ferroalloy industries were established at ferroalloy enterprises.