Aircooled crushing device and method of molten steel slag

Abstract

The invention discloses an aircooled crushing device of molten steel slag. The device comprises a rolling crushing chamber (1), a rolling crushing device (2), a slag pushing device (3), a traveling trolley (4) and an afterheat recycling device (5), wherein the rolling crushing device (2) and the slag pushing device (3) are positioned on the traveling trolley (4); and the traveling trolley (4) moves in the rolling crushing chamber (1) along rails on the two sides of the rolling crushing chamber (1). An aircooled crushing method comprises the following steps of: pouring the molten steel slag into the rolling crushing chamber (1); blowing normal-temperature air with an air supply device (5-1) to cool the molten steel slag; crushing big steel slag of which the surface is crusted into small steel slag with the rolling crushing device (2), and turning the molten steel slag under the hard crusts to the surfaces at the same time so as to improve the heat exchange efficiency; repeatedly performing air cooling and crushing on the steel slag until the temperature of the steel slag is cooled to certain temperature, wherein the normal-temperature air is heated at the same time and enters the afterheat recycling device (5) for power generation, heat supply and the like; and pushing cooled blocky steel slag to a slag groove through a chute by using the slag pushing device (3), and stabilizing the blocked steel slag.

Description

technical field [0001] The invention relates to an air-cooled roller crushing treatment device and method for molten steel slag, belonging to the field of solid waste treatment. Background technique [0002] At present, there are many methods for processing and crushing molten steel slag, mainly including hot pouring method, hot stuffing method, water quenching method, wind quenching method, drum method and granulation wheel method, etc. [0003] The hot pouring process is a method that is widely used at home and abroad. Its basic principle is to spray limited water on the steel slag when the slag is higher than the hardenable temperature, so that the temperature stress generated by the slag is greater than the ultimate stress of the slag itself, causing cracks in the steel slag. [0004] The principle of the hot stuffing method is to dump the liquid steel slag directly into the hot stuffing device, cover the device, and automatically control the water spray to generate ste...

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Problems solved by technology

[0008] Among the above methods, the hot pouring method occupies a large area, has a long treatment cycle, and has a large amount of steam and unorganized discharge; the water quenching method, wind quenching method, drum method and granulation wheel method all have relatively large impact on the fluidity of liquid slag. High requirements, only suitable for processing liquid steel slag with good fluidity. With the progress of steelmaking technology, the viscosity of steel slag tends to increase, which is not conducive to the safe and efficient treatment of molten liquid steel slag

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