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Low-dust iron and steel metallurgy method

A technology of iron and steel metallurgy and steel slag, which is applied in the direction of reducing gas emissions, and can solve problems such as palliatives but not root causes, environmental pollution, etc., and achieve the effects of high degree of automation, excellent internal quality of products, and low cost

Pending Publication Date: 2019-07-16
武汉桂坤科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As we all know, in traditional iron and steel metallurgy, from iron ore powder to steelmaking, there are sintering, coking, blast furnace ironmaking, injection steelmaking and other processes, and these processes are serious sources of high dust pollution in iron and steel metallurgy. According to the data Statistics: Based on the calculation of my country's annual output of 800 million tons of steel, about 96 million tons of iron-containing dust are produced every year. At present, all iron and steel enterprises are trying their best to invest huge sums of money in comprehensive treatment. There will still be a lot of dust in the air, which will pollute the environment

Method used

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  • Low-dust iron and steel metallurgy method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1. Select raw materials: choose iron concentrate powder as raw material, and the content of each element in iron concentrate powder is

[0041] Fe: 71.3%; S: 0.018; P: 0.015.

[0042] Granulation (3￠-8mm): Add water, carbon powder and binder to the above-mentioned iron concentrate powder to granulate to obtain iron oxide particles:

[0043] The ratio of each component of the iron oxide particles is: mineral powder: water: binder: graphite powder = 1: 0.08: 0.02: 0.04;

[0044] S2. Reduction: Send the raw materials into the belt reduction furnace, add the catalyst, and use the catalyst to reduce the CH 4 Convert to H 2 and CO to reduce iron oxide, set the temperature to 1000 degrees Celsius, heat for 1-3h, and the thickness of the material layer is 20-30mm to obtain metal iron particles. Other metal elements in iron oxide exist in the form of MxOy in the In the metal iron particles, M is other metal elements.

[0045]The parameters of the belt reduction furnace are:...

Embodiment 2

[0053] S1. Select raw materials: choose iron concentrate powder as raw material, and the content of each element in iron concentrate powder is

[0054] Fe: 71.3%; S: 0.018; P: 0.015.

[0055] Granulation (3￠-8mm): Add water, carbon powder and binder to the above-mentioned iron concentrate powder for granulation to obtain 2# iron oxide particles:

[0056] The ratio of each component of iron oxide particles is: mineral powder: water: binder = 1: 0.08: 0.02;

[0057] S2. Reduction: send the raw materials into the belt reduction furnace, add the catalyst, and use the catalyst to reduce the CH 4 Convert to H 2 and CO to reduce iron oxide, set the temperature to 950 degrees Celsius, heat for 1-3h, and the thickness of the material layer is 20-30mm to obtain metal iron particles. Other metal elements in iron oxide exist in the form of MxOy in the In the metal iron particles, M is other metal elements.

[0058] The parameters of the belt reduction furnace are: stainless steel widt...

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Abstract

The invention provides a low-dust iron and steel metallurgy method. The low-dust iron and steel metallurgy method comprises the following steps that S1, raw materials are selected, specifically, concentrate powder with the Fe content being greater than or equal to 65% or crushed rolled steel oxidized scale, water and a binder are selected for pelletizing; S2, reduction is conducted, specifically,the raw materials are fed into a belt-type reduction furnace, a catalyst is added, CH4 is converted into H2 and CO through the catalyst at the high temperature, ferric oxide is subjected to reductionsmelting, the temperature is set to be 900-1050 DEG C, the heating time is 1-3 h, the thickness of a material layer is 20-30 mm, thus metal iron particles are obtained, other metal elements in the ferric oxide exist in the metal iron particles in the form of MxOy, and M is the other metal elements; S3, cold pressing or hot pressing is conducted, specifically, the metal iron particles at the temperature of 50-800 DEG C are directly subjected to cold pressing and hot pressing to be 3-5 g / cm<3> of blocky iron; and S4, smelting separation is conducted, specifically, 3-10% of CaO or CaF2 is added into the furnace, and smelting separation is conducted to obtain clean molten steel with the Fe content being greater than or equal to 99.0% and a small amount of solid steel slag containing impurities. According to the low-dust iron and steel metallurgy method, almost no dust is generated in the whole production process, and thus low-dust environment-friendly metallurgy is carried out.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a low-dust iron and steel metallurgy method. Background technique [0002] As we all know, in traditional iron and steel metallurgy, from iron ore powder to steelmaking, there are sintering, coking, blast furnace ironmaking, injection steelmaking and other processes, and these processes are serious sources of high dust pollution in iron and steel metallurgy. According to data Statistics: Based on the calculation of my country's annual output of 800 million tons of steel, about 96 million tons of iron-containing dust are produced every year. At present, all iron and steel enterprises are trying their best to invest huge sums of money in comprehensive treatment. There will still be a lot of dust in the air, which will pollute the environment. Contents of the invention [0003] In order to overcome the defects of the prior art, the present invention provides a method of using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242C21B11/00C21C1/00
CPCC21B11/00C21C1/00C22B1/2406C22B1/242Y02P10/143
Inventor 李森蓉熊忠林李雄熊钢
Owner 武汉桂坤科技有限公司
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