High-temperature steel slag disc crushing waste heat recovery device and method

Abstract

The invention discloses a high-temperature steel slag disc crushing waste heat recovery device. The high-temperature steel slag disc crushing waste heat recovery device comprises a liquid slag tank 1, a slag pouring machine 2, high-temperature slag 3, a slag pulling machine 4, a disc crushing bed 5, a crusher 9, a track 24, a solid slag tank 25, a slag receiving vehicle 26, a pipeline 27, a draught fan 28, a heat exchanger 29 and a generator 30, the liquid slag tank 1 is arranged on the slag pouring machine 2, the high-temperature slag 3 is arranged in the liquid slag tank 1, the slag pulling machine 4 is arranged on the side part of the slag pouring machine 2, the disc crushing bed 5 is arranged below the slag pouring machine 2, the crusher 9 penetrates through the disc crushing bed 5 and is arranged above the track 24, a slag pushing part of the crusher 9 is arranged in the disc crushing bed 5, the slag pushing part drives a high-temperature steel slag layer to move from an inlet of the disc crushing bed 5 to an outlet of the disc crushing bed 5, the solid slag tank 25 is arranged below the disc crushing bed 5 and is fixed to the slag receiving vehicle 26, and the disc crushing bed 5, the draught fan 28, the heat exchanger 29 and the generator 30 are connected through the pipeline 27.

Description

technical field [0001] The invention relates to the field of waste treatment and utilization, in particular to a high-temperature steel slag disc crushing waste heat recovery device and method. 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 and more than 80 million tons of inorganic materials, which has great significance in resource recovery value. [0003] The efficient recovery of metall...

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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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