Thermal state steel slag waste heat recovery system and recovery method

Abstract

A thermal state steel slag waste heat recovery system and recovery method pertains to the field of steel melting waste heat recovery technique. The system includes a slag basin, a wheeled material allocation quantitative feeder, slag inlet hole, a residue port, an air inlet port, an air outlet port, waste heat boiler, slag teeth, a feed lifting plate, and a rotary type steel slag waste heat recovery device, wherein, the wheeled material allocation quantitative feeder is composed of graining wheels connected in series, the slag teeth and the feed lifting plate are distributed on the inner wallof the rotary barrel, when the steel slag thrown by the feed lifting plate falls back to the bottom of the rotary barrel, the steel slag is crushed by the interaction between the steel slag and the slag teeth. Slag poured out from the slag pot with different fluidities, after crushing processing by the wheeled material allocation quantitative feeder, is quantitatively fed to the rotary type steelslag waste heat recovery device, and then further crushing processing to the steel slag and the recycling to the residual heat of steel slag are simultaneously realized. The invention has advantages of realizing graining and waste heat recovery processing to the slag pot with different fluidities.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a waste heat recovery system and recovery method for hot steel slag, which is suitable for the waste heat recovery of steel slag with various degrees of fluidity produced in the steelmaking process. Background technique [0002] The recovery and efficient conversion of waste heat resources in iron and steel enterprises have always been the focus of attention of metallurgists around the world. Among them, the temperature of liquid steel slag is 1500 ℃ ~ 1700 ℃, and the quality of waste heat is high, which is of great utilization value. [0003] In the air-quenched steel slag treatment process with heat recovery developed by the Ural Iron and Steel Research Institute in Russia, the liquid steel slag can be cooled to 160-200°C after being crushed by high-pressure wind, and the waste heat can be recovered to produce hot water, steam, etc. In 1981, Mitsu...

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Problems solved by technology

[0009] At present, in addition to the vertical heat exchanger mentioned in the patent "Metallurgical Slag Sensible Heat Utilization Device" with the patent number ZL 200720021048.6, and the patent "A Blast Furnace Slag Sensible Heat Recovery System and Production Process" with the application number 200510047090.0 In addition to the chain grate machine structure or the slag tank structure, there is no dedicated steel slag waste heat recovery equipment

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