Method and apparatus of blast furnace slag quench and heat recovery

A waste heat recovery and blast furnace slag technology, which is applied in the direction of recycling technology and process efficiency improvement, can solve the problems of increasing the flow rate of cooling medium, low quality of recovered heat, contradiction between cooling speed and heat recovery effect, etc., and achieve rapid cooling , Simple structure, easy installation
CN101550460AActive Publication Date: 2009-10-07TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2009-10-07

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Abstract

The present invention discloses method and apparatus of blast furnace slag quench and heat recovery belongs to blast furnace slag quench and heat recovery technology field. The apparatus is composed of feed inlet, gas / solid separator, storage tank, lift pipe, wind-supply system, cooling water system. The invention ejects the blast furnace slag into circulating fluid bed, through fluidization wind to bring the blast furnace slag into cyclone separator to implement separation of gas and solid, simultaneity the water wall dual cooling system around the fluidization wind and gas-solid separator cooling down the blast furnace slag rapidity to get the quench impression; the separated blast furnace slag goes into the storage tank and access the fluidization wind from the bottom to make the blast furnace slag in bubbling bed status, and further cooling to implement ejecting slag layer by layer; the cooling wind and cooling water goes into the boiler after pressure treatment, implementing heat recovery totally. The invention is provided with advantages of cooling rapidly and fully; effective heat recovery; good graining impression; ejecting slag layer by layer; simple system structure and easy to implement.
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Description

Technical field

[0001] The invention belongs to the technical field of blast furnace slag quenching and waste heat recovery, and particularly relates to a method and device for blast furnace slag quenching and waste heat recovery. Background technique

[0002] Blast furnace slag is a by-product of converting iron ore into pig iron in a blast furnace, and its main components are CaO and SiO 2 , Al 2 O 3 And MgO. The quenched blast furnace slag has good hydraulic cementing properties, so it can be recycled to produce cement and other high value-added products; at the same time, because its temperature is about 1400~1600℃, the heat taken away per ton of slag About 60kg of standard coal, so the recovery and utilization of waste heat is also an important aspect.

[0003] The water quenching process is a kind of quenching treatment method of blast furnace slag, and it has been widely used at present. The advantage is that the cooling rate is fast and the quality of raw materials for ce...

Claims

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