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Molten blast furnace slag sensible heat recovery method and device

A technology of sensible heat recovery and blast furnace slag, applied in recycling technology, furnace, waste heat treatment and other directions, can solve problems such as environmental pollution and achieve the effect of saving energy

Inactive Publication Date: 2010-03-03
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

In the production of steel products, a large amount of waste is also discharged, causing serious pollution to the environment

Method used

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  • Molten blast furnace slag sensible heat recovery method and device
  • Molten blast furnace slag sensible heat recovery method and device

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Embodiment Construction

[0016] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0017] Sensible heat recovery method of molten blast furnace slag, the molten blast furnace slag first recovers the heat in the granulator for the first time, then recovers the heat for the second time through the vibrating bed, and finally recovers the heat for the third time in the fluidized bed. The thermal energy is reused or converted into energy in the form of hot wind or power generation, and the steps to realize it are as follows:

[0018] 1) The molten blast furnace slag with a temperature of 1400-1500°C flows into the granulator through the slag tank, and is broken into particles with a diameter of 1-5mm under the centrifugal action of 1800-2000 rpm and hits the water wall of the granulator Cooling and solidification on top to complete the first heat exchange;

[0019] 2) The above-mentioned high-temperature blast furnace slag particles...

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Abstract

The invention relates to the field of energy recovery utilization and in particular to a molten blast furnace slag sensible heat recovery method and a device; the method is characterized in that: themolten blast furnace slag carries out a first heat recovery in a granulator, and then a second heat recovery is carried out by a vibrated bed, and then a third heat recovery is carried out in a fluidized bed, and the reclaimed heat energy is reutilized or converted in a hot air or power generating way; the realization steps are that: 1) the molten blast furnace slag is arranged in the granulator for granulation; 2) the blast furnace slag granules carry out heat exchange in the vibrated bed; 3) the blast furnace slag granules carry out heat exchange in the fluidized bed; 4) after heat exchangeis carried out, the heat is used for power generation from air or is directly utilized in a hot wind way. The method has the beneficial effects that: the sensible heat of the molten blast furnace slagis utilized respectively in a way of waste heat stream power generation and in a way of blast furnace hot wind, compared with the existing water quenching method, 1.0-1.2t of fresh water can be savedwhen processing 1t of molten slag, and sulfides H2S and SO2 are not produced, and energy equivalent to 47kg of standard coal is saved.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization, in particular to a method and device for recovering sensible heat from molten blast furnace slag in the steel and nonferrous metallurgy industries. Background technique [0002] The iron and steel industry provides important basic raw materials for the development of the national economy, and is a resource-intensive industry that consumes a lot of energy and resources. While producing steel products, a large amount of waste is also discharged, causing serious pollution to the environment. Although the iron and steel industry is a major energy consumer and pollutant discharger in the national economy, it is also one of the industries with great potential for energy conservation and emission reduction. Among them, recycling all kinds of waste heat is an important breakthrough for further energy saving in the iron and steel industry. Blast furnace slag is a by-product formed from gan...

Claims

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Application Information

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IPC IPC(8): C21B3/06F27D17/00
CPCY02P10/20Y02W30/50
Inventor 谢国威李顺蔡九菊门传政
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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