Smelting reduction hydrogen metallurgy process and device

A technology of hydrogen metallurgy and technology, which is applied in the field of smelting reduction hydrogen metallurgy technology and equipment, can solve the problems of low hydrogen utilization rate, hydrogen waste, and increased hydrogen use cost, so as to improve hydrogen utilization efficiency, improve purity, and save The effect of dosage

Active Publication Date: 2021-01-29
SHANDONG MOLONG PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these smelting reduction hydrogen metallurgy technologies, the utilization rate of hydrogen is not particularly high, resulting in the waste of a part of hydrogen and increasing the cost of hydrogen use

Method used

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  • Smelting reduction hydrogen metallurgy process and device
  • Smelting reduction hydrogen metallurgy process and device
  • Smelting reduction hydrogen metallurgy process and device

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Experimental program
Comparison scheme
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Embodiment approach

[0058] According to a typical embodiment of the present invention, a smelting reduction hydrogen metallurgy process is provided, the smelting reduction hydrogen metallurgy process includes: injecting hydrogen gas into the combustion zone of the smelting reduction furnace to form a high-pressure swirl in the combustion zone; Gas is injected into the iron bath area of ​​the smelting reduction furnace to inject the mixture of iron-containing material and magnesium-containing flux, the first recarburizer and the first lime.

[0059] Applying the technical scheme of the present invention, hydrogen is injected into different areas of the smelting reduction furnace respectively, one is injected into the combustion area to form a high-pressure swirl, the other is injected as a carrier gas into the iron bath area to reduce iron-containing materials, When the hydrogen gas injected into the iron bath area enters the combustion area along with the splashed slag, the high-pressure swirl for...

Embodiment 1

[0089] Using the above-mentioned smelting reduction hydrogen metallurgy process, when the ratio of materials entering the smelting reduction furnace (the molar ratio of C in the carburant to H in the hydrogen) is different, the angles of the furnace wall spray guns are different, and the angles of the material spray guns are different, The utilization rate of the obtained hydrogen is shown in Table 1.

[0090] Table 1

[0091]

[0092]

[0093] From Table 1, it can be seen that using the smelting reduction hydrogen metallurgy process provided by the present application, the utilization rate of hydrogen can reach up to 95%, which shows that the utilization rate of hydrogen can be significantly improved. It can also be seen from Table 1 that the utilization rate of hydrogen can be changed by adjusting the parameters of the device, and the utilization rate of hydrogen can meet different customer needs. When customers need to use reducing gas, the parameters of the device can ...

Embodiment 2

[0095] By pre-reducing the iron-containing material before entering the smelting reduction furnace, the pre-reduction degree of the iron-containing material under different parameters is shown in Table 2.

[0096] Table 2

[0097]

[0098] Iron-containing materials enter the smelting reduction furnace after three-stage pre-reduction treatment, which is conducive to improving the reduction efficiency of iron-containing materials in the smelting reduction furnace, saving hydrogen consumption, improving hydrogen utilization efficiency, and further increasing production capacity and improving melting Technical and economic indicators of reduction smelting.

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Abstract

The invention discloses a smelting reduction hydrogen metallurgy process and device. The smelting reduction hydrogen metallurgy process includes the steps that hydrogen is injected into a combustion area of a smelting reduction furnace to form high-pressure rotational flow in the combustion area; and a mixture of an iron-containing material and a magnesium-containing flux, a first carburant and first lime are blown into an iron bath area of the smelting reduction furnace by taking the hydrogen as a carrier gas. According to the smelting reduction hydrogen metallurgy process, the high-pressurerotational flow is formed in the combustion area, so that the retention time of the hydrogen in the smelting reduction furnace and the contact time of the hydrogen and iron-containing materials are prolonged, the amount of the hydrogen entering the combustion area discharged out of the smelting reduction furnace along with flue gas is reduced, the reduction reaction of the iron bath area is enhanced, the content of FeO in slag is reduced, the refractory material erosion speed is reduced, and the hydrogen utilization rate is increased; and the hydrogen is used as the carrier gas, so that the injection depth of a reducing agent can be effectively increased, the fountain effect in the smelting reduction furnace is enhanced, the reduction efficiency in the smelting reduction furnace is improved, and carbon emission in the metallurgical process is reduced.

Description

technical field [0001] The application relates to a smelting reduction hydrogen metallurgy process and device, belonging to the technical field of hydrogen metallurgy. Background technique [0002] During the production period of the iron and steel industry, coal and iron ore are mainly used as raw materials. The exhaust gas emitted during the smelting process contains a large amount of carbon dioxide, which not only pollutes the environment, but also wastes resources. With the increasing requirements for energy saving, emission reduction and pollution prevention and control, the iron and steel industry, which consumes a large amount of coal resources, is facing a development dilemma. In order to adapt to energy-saving and clean production, it is an inevitable trend to develop low-carbon metallurgical technology. In the search for a reducing agent that can replace coal, hydrogen has attracted much attention. This is because hydrogen is used as a reducing agent for iron ore....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/14
CPCC21B13/0073C21B13/143Y02P10/20
Inventor 张冠琪王金霞张晓峰韩军义陈庆孟魏召强张巧丽
Owner SHANDONG MOLONG PETROLEUM MACHINERY
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