High-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method

Abstract

The invention relates to a high-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method. A crushing bed is adopted as a high-temperature steel slag treatment carrier, a crusher is adopted for efficiently crushing steel slag, meanwhile, cold air is introduced into a bottom blowing air cooling box to solidify and cool the high-temperature steel slag, and meanwhile, the crusher rotates at a certain speed, moves forwards and backwards and rotates to crush the steel slag. A heat exchanger and a generator are adopted for cooling the high-temperature steel slag to generate high-temperature waste heat for recovery and power generation. The crushing capacity is high, the steel slag treatment efficiency is greatly improved, and meanwhile, waste heat recoveryand power generation can be realized by adopting air cooling heat exchange. Efficient crushing and waste heat recovery of the high-temperature steel slag are realized, a steel slag water cooling system device is omitted, a simple dry dust removal mode is adopted to replace a wet flue gas treatment system caused by a previous water cooling process, the advantages of being high in automation degree,small in space occupation, good in leakproofness, low in system investment, capable of achieving ultra-clean emission and the like are achieved, and the comprehensive economic benefits of steel slagtreatment are improved.

Description

technical field [0001] The invention relates to a device and method for recovering waste heat of high-temperature steel slag bottom air-cooled crushing, in particular to a device and method for recovering waste heat of high-temperature molten steel slag produced in the production process of iron and steel enterprises by air-cooling and crushing. Background technique [0002] In recent years, my country's annual steel output has exceeded 800 million tons, accounting for about 120-140 kg of steel slag produced per ton of steel produced, and the annual production of steel slag in my country has exceeded 100 million tons. Steel slag contains two types of resources, iron metal resources and inorganic materials such as calcium silicate, which have the material properties of resource utilization. For a long time, my country's iron ore has mainly relied on imports, and resources are very scarce. my country's steel slag is expected to recover nearly 20 million tons of iron resources...

AI Technical Summary

Problems solved by technology

At present, the waste heat recovery of high-temperature slag such as metallurgical slag is still in the experimental research stage, and it is often difficult to realize the full utilization of the two resources of slag and heat.

At home and abroad, a large number of laboratory and industrial pilot test researches have been carried out on the recovery of waste heat from wind-quenched steel slag, but often due to improper methods, low recovery rate of iron resources, discontinuous production, and poor comprehensive economic benefits, it cannot be produced and applied

In addition, there is also the use of smelting slag cooling to generate water vapor or hot water for heat exchange and utilization, but the utilization rate of waste heat is low, and it does not have the economic conditions for industrial operation

[0007] In view of the problems that the existing steel slag treatment process and equipment occupy a large space, the system investment is high, and the waste heat cannot be recycled, it is urgent to develop a new steel slag treatment process

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