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

Abstract

The invention provides a high-temperature steel slag rotating bed crushing waste heat recovery device and method. The high-temperature steel slag rotating bed crushing waste heat recovery device comprises a liquid slag tank (1), a slag pouring machine (2), a rotating bed (5), a slag pulling machine (6), a circulating fan (7), an air pipe (8), a heat exchanger (9), a steam pipe (10), a power generator (11) and a solid slag tank (14), wherein the liquid slag tank (1) is arranged on the slag pouring machine (2) in a pouring mode, and the slag pulling machine (6) is arranged above the rotating bed (5); and the circulating fan (7) is connected with the rotating bed (5) and the heat exchanger (9) through the air pipe (8), the heat exchanger (9) is connected with the power generator (11) through the steam pipe (10), the rotating bed (5) is rotationally arranged between the slag pouring machine (2) and the circulating fan (7), and steel slag is cooled and discharged through the rotating bed (5). The device and method greatly solve the problem about discharge in the steel slag treatment process, greatly reduce the investment of public and auxiliary facilities such as water and dust removal, effectively reduce the steel slag production and operation cost, and improve the system income.

Description

Technical field [0001] The present invention relates to a steel slag treatment technology, in particular, a device and method for rotating a screw-breaking heat recovery of high temperature melt steel slag. Background technique [0002] In recent years, my country's annual steel production has exceeded 800 million tons, accounting for 120 to 140kg of steel slag every production, and my country has exceeded 100 million tons. Steel slag contains two types of irons and other inorganic materials such as iron metal resources and calcium silicate, and has resource utilization material properties. For a long time, my country's iron ore mainly rely on imports, and resources are very shortage. my country's steel slag is expected to recover iron resources nearly 20 million tons, and inorganic materials reach more than 8,000 tons, with significant significance of resources recovery. [0003] The efficient recovery of metal iron and inorganic material resources in steel slag first requires f...

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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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