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Method for making reducing gas special for indirect reduction of iron oxides

A technology of iron oxide and manufacturing method, applied in the direction of manufacturing combustible gas, granular/powdered fuel gasification, furnace, etc., can solve the problems of increasing carbon consumption, unfavorable energy saving, high processing cost, etc., to reduce consumption and cost The effect of low and high reducing power

Inactive Publication Date: 2010-08-25
SHANDONG PROVINCE METALLURGICAL ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The method of using carbon to produce reducing gas increases the consumption of carbon, and the carbon will eventually be discharged in the form of carbon dioxide, causing environmental pollution
[0007] 2. In the existing method of using carbon to produce reducing gas, the temperature of the usual product gas is relatively high, which is not suitable for direct use, and requires a moderate cooling process, which is not conducive to saving energy; when the temperature of the product gas is relatively high When it is low, the product gas contains a large amount of organic matter such as tar and phenol, which makes the subsequent treatment of the gas costly and pollutes a lot

Method used

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  • Method for making reducing gas special for indirect reduction of iron oxides
  • Method for making reducing gas special for indirect reduction of iron oxides

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Embodiment 1

[0025] Example 1, such as figure 1 and figure 2 shown.

[0026] This embodiment is used to cooperate to illustrate the manufacturing method described in the present invention.

[0027] exist figure 1 Among them, 1 represents the gas generator. 2 represents the oxygen delivery channel. 3 represents the delivery passage of carbon (actually used is pulverized coal, the same below). 4 represents the delivery channel of coke oven gas. 5 represents the input channel of secondary carbon. 6 represents the delivery channel of the finished product reducing gas. 7 is a channel for injecting coke oven gas to the slag pool. 8 is a passage for injecting oxygen (also can be high-temperature hot air) to the slag pool. 9 is the liquid slag in the slag pond. exist figure 1 The positions A1 and A2 indicated in , indicate the optional positions of channels 4 and / or 5, and the specific determination of this position shall be carried out according to the combustion conditions in the g...

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Abstract

The invention discloses a method for making a reducing gas special for indirect reduction of an iron oxides and belongs to the technical field of iron-making. The method comprises the following steps of: preparing a gas generating furnace, supplying carbon, inputting oxygen, and the like, and is characterized in that: the raw material gas injected into the gas generating furnace comprises coke oven gas. The method for making the reducing gas can fully utilize chemical potential of the coke oven gas, maximize the true value of the coke oven gas, can reduce the carbon consumption and realize emission reduction of carbon dioxide, and is applied to making the reducing gas for producing sponge iron and / or being injected into a blast furnace to improve the reducing capacity of the indirect reduction section in the blast furnace.

Description

technical field [0001] The invention relates to a method for manufacturing a reducing gas specially used for the indirect reduction of iron oxides, belonging to the technical field of ironmaking. Background technique [0002] Ironmaking is a very mature technology; common ironmaking methods, including blast furnace ironmaking and sponge iron production, all require the participation of reducing gases. [0003] In the process of blast furnace ironmaking, the reducing gas is mainly the intermediate product of the blast furnace smelting process. It is a balance quantity, which is compatible with the reduction degree of indirect reduction in the existing blast furnace; in order to increase the indirect reduction degree inside the blast furnace, some people A method of injecting reducing gas into the blast furnace is proposed to increase the indirect reduction degree of the charge. [0004] In the production process of sponge iron, reducing gas is also one of the necessary condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46C10J3/72C21B5/00C21B13/00
Inventor 姚朝胜周传禄魏新民姜洪军于国华肖燕鹏钱纲黄东生
Owner SHANDONG PROVINCE METALLURGICAL ENG CO LTD
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