Clean molded coal with steel slag checking tailing additive and preparation method thereof

Abstract

The invention relates to clean molded coal with a steel slag checking tailing additive and a preparation method thereof, and belongs to the field of clean coal application. The clean molded coal comprises, by mass, 60-85% of coal powder, 5-20% of coke powder, 3-12% of steel slag checking tailings and 5-10% of low-temperature activated steel slag checking tailings. The clean molded coal realizes high efficiency resource comprehensive utilization of steel slag checking tailings, greatly reduces environmental pollution caused by lime production and cement production, and reduces high-quality electric power consumption and land resource destroy. Steel slag checking tailings replace a common molded coal additive so that a clay use amount is reduced and land resource destroy is reduced. Molded coal combustion is clean and a molded coal making cost is low.

Description

technical field [0001] The invention relates to a clean briquette using steel slag double-selected tailings as an additive and a preparation method thereof, belonging to the application field of clean coal. Background technique [0002] my country is the largest coal producer and consumer in the world, and coal accounts for more than 75% of primary energy, and for a long time, my country's coal-based energy consumption structure will not change. The coal combustion process will produce a variety of harmful gases that pollute the atmosphere, which is the main cause of smog, acid rain, photochemical smog, and gaseous heavy metal pollutants. Therefore, the development of clean combustion technology is one of the important ways to improve the quality of my country's atmospheric environment. [0003] Steel slag is a solid slag body composed of slag-forming materials added to adjust the properties of steel slag during the steelmaking process. According to estimates, about 0.15t of...

AI Technical Summary

Problems solved by technology

The comprehensive utilization of re-selected steel slag tailings in my country is low. According to statistics, the utilization rate of steel slag re-selected tailings in my country was less than 20% in 2011. Pollution of local water bodies

[0005] 1) When the binder is clay, it has the disadvantage of destroying land resources and ecological environment

[0006] 2) When the binder is cement, the amount of cement production is increased (the amount of cement added is about 10%). Cement production is a heavily polluting industry. Although the briquettes are burned cleanly, the production of the binder has caused more pollution. Serious environmental pollution. At the same time, the high investment and high energy consumption of its cement plant has aggravated the environmental pollution of the upstream industry and consumed a large amount of high-quality energy (electricity)

[0007] 3) The use of quicklime as the sulfur fixation agent has high economic efficiency, but lime production is also a heavily polluting process. Therefore, the clean briquette burns cleanly, but the production of the sulfur fixation agent has caused more serious environmental pollution. At the same time, The high investment and high energy consumption of its ash plant has aggravated the environmental pollution of the upstream industry and consumed a large amount of high-quality energy (electricity)