Melting iron and steel slag heat energy recovery method and device

A heat recovery and iron and steel slag technology, applied in the direction of recycling technology, process efficiency improvement, etc., can solve the problem of no reliable method, achieve the effect of simple structure, less equipment investment, and zero emission
CN101619367AInactive Publication Date: 2010-01-06SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
Publication Date
2010-01-06
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a melting iron and steel slag heat energy recovery method and a device, which can be applied to enterprises and production technologies relating to slag discharging under high temperature in fields like iron and steel, nonferrous metal metallurgy, etc. The invention comprises the following steps: placing melting iron and steel slags from blast furnace or revolving furnace and a small quantity of cold state iron and steel slags into a heat insulation tank; mixing evenly to ensure that a slag pool is formed in the slag tank; enlarging heat exchange area by the granulation effect of the cold slag on the melting iron and steel slag to ensure that the heat energy of melting slag is effectively recovered; realizing the process of heat energy recovery by blowing in cold wind and introducing hot wind into a waste heat boiler after the cold wind is heated. The invention fully utilizes sensible heat in slag discharging, centralizes the heat slags in a storage tank by granulating cold slags to realize heat energy recovery, therefore, the invention has simple technology, low cost, and can utilize waste heat resources effectively; besides, ferrous recovery and reuse can be carried out on the slags after treated under a low temperature.
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Description

technical field

[0001] The invention relates to the technical field of resource utilization and waste heat recovery, and relates to a method and device for heat recovery of molten iron and steel slag, which can be applied to enterprises and production processes involving high-temperature discharge of slag in industries such as iron and steel and nonferrous metallurgy. Background technique

[0002] Steel slag and iron slag are wastes produced in the process of smelting, and the annual discharge of this industry in my country reaches tens of millions of tons. The iron content in the slag is about 10-15%, and the discharge temperature is about 1500โ„ƒ. The resources of slag, the latent heat of slag in the high-temperature molten state is recycled, and the slag and iron are further separated, which can not only turn waste into treasure to achieve the purpose of comprehensive utilization of resources, but also fully and effectively use the high-temperature heat energy of molten sla...

Claims

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