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Method for computing degree of direct reduction and gas utilization rate of blast furnace under condition of high-reactivity coke

A high-reactivity coke, calculation method technology, applied in the direction of blast furnace, calculation, blast furnace details, etc., can solve problems such as inapplicability

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

In this case, the usual method of calculating the blast furnace gas utilization rate is no longer applicable, and it is necessary to use a new method to accurately calculate the blast furnace gas utilization rate

Method used

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  • Method for computing degree of direct reduction and gas utilization rate of blast furnace under condition of high-reactivity coke
  • Method for computing degree of direct reduction and gas utilization rate of blast furnace under condition of high-reactivity coke
  • Method for computing degree of direct reduction and gas utilization rate of blast furnace under condition of high-reactivity coke

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Embodiment Construction

[0042] Based on the production data of a large domestic steel plant such as raw materials, fuels, and operating processes, the calculation of the changes in the ratio of highly reactive coke added from 0% to 12%, the direct reduction degree, indirect reduction degree, and gas utilization rate of the blast furnace , and the calculation results are shown in Table 1.

[0043] Table 1 Analytical calculation results of adding high reactivity coke (HRC)

[0044]

[0045] It can be seen from Table 1 that when the reaction amount of high-reactivity coke is increased from 0 to 12%, the indirect reduction degree of blast furnace smelting increases from 0.440 to 0.453, and the direct reduction degree decreases from 0.400 to 0.348. degree from 0.400 to 0.255, the utilization rate of gas in the thermal reserve area increased from 25.18% to 30.12%, and the utilization rate of blast furnace gas increased from 52.15% to 59.33%, indicating that adding a certain proportion of highly reactive...

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Abstract

The invention belongs to the field of blast furnace iron making, and relates to a method for computing the gas utilization efficiency of a blast furnace under the condition that high-reactivity coke is added into the blast furnace. The method further can be used for respectively computing degrees of direct reduction and degrees of indirect reaction of a high-temperature region and a heat storage region of the blast furnace under the condition that the high-reactivity coke is added into the blast furnace. The total degree of direct reduction of the blast furnace is r<d>, and the gas utilization rate of the blast furnace is eta<co>. By the method, the degree of direct reduction of the blast furnace for smelting and the gas utilization of the blast furnace can be accurately computed under raw material conditions, production of the blast furnace can be guided, and the method is also applicable to the traditional blast furnace under the condition of using metallurgical coke.

Description

technical field [0001] The patent of the invention belongs to the field of blast furnace ironmaking, and relates to a calculation method of gas utilization efficiency under the condition of adding high-reactivity coke to the blast furnace, and at the same time can calculate the direct reduction degree of the high-temperature area and the heat reserve area under the condition of adding high-reactivity coke to the blast furnace , Indirect reduction degree. Background technique [0002] Use search conditions: abstract = (high reactive coke) AND abstract = (gas utilization rate); or, abstract = (high reactive coke) AND abstract = (degree of direct reduction); and abstract = (high reactive coke) AND abstract =(direct reducerate); or abstract=(high reactive coke)AND abstract=(gasutilization efficiency) to search domestic and foreign databases. After careful searching, there is no content of invention identical or similar to this patent application. [0003] Blast furnace gas uti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00G06F19/00
Inventor 吴胜利张丽华庹必阳武建龙孙颖
Owner UNIV OF SCI & TECH BEIJING
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