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Method for measuring ore matching efficiency of integrated furnace charge of blast furnace

A technology that integrates charge and measurement methods, applied in the field of metallurgy, can solve the problems of long cycle, poor ore blending efficiency, production loss, etc., and achieve the effect of avoiding production loss

Inactive Publication Date: 2013-12-18
NANJING IRON & STEEL CO LTD
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Problems solved by technology

It is necessary to realize the efficiency calculation after the implementation of the ore blending ratio of a blast furnace production and obtain various technical and economic indicators. On the one hand, this will result in a long period of efficiency calculation, and there may be a possibility of poor ore blending efficiency. On the other hand, since there are many factors affecting the technical and economic indicators of blast furnace production obtained afterwards, we can consider that the ore blending ratio is the main factor in the contribution to the good technical and economic indicators obtained after the event, but it cannot It is said that it is all, so it is not possible to accurately define the ore blending efficiency

Method used

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Embodiment Construction

[0062]

[0063] A method for measuring the comprehensive charge ore blending efficiency of a blast furnace, specifically as follows:

[0064] 1) Introduce the concept of total characteristic value (S) of droplet performance

[0065] The total characteristic value of the droplet performance is the evaluation of the metallurgical performance of the mixed blast furnace charge of the blast furnace production ratio combination. Well, the calculation formula is:

[0066] S = (4)

[0067] In the formula, ts is the starting melting temperature, which is the temperature corresponding to ΔPd / 2, °C; td is the temperature at the beginning of dripping, °C; ΔPs is the pressure difference at the beginning of melting, ΔPs=ΔPd / 2, Pa; ΔPd is Maximum pressure difference, Pa.

[0068] 2) Determination of the total characteristic value Sn of the droplet performance of each blast furnace production ore blending ratio (n=1, 2, 3, ....)

[0069] (1) The measurement of the droplet pe...

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Abstract

The invention discloses a method for measuring ore matching efficiency of an integrated furnace charge of a blast furnace. The method comprises the following steps: firstly, measuring a total characteristic value Sn of the drop performance of mixed blast furnace charge of each ore matching rate by using an iron ore soft melting drop test device, and then measuring a total characteristic value sn of the drop performance of sintered ore used by each mixed blast furnace charge; finally measuring the ore matching efficiency etan of the ore matching rate of production of each blast furnace; comparing the ore matching efficiency of the ore matching rate under the condition that other metallurgical performances of the integrated furnace charge of the blast furnace is kept appropriate. By adopting the method, calculation of the ore matching efficiency can be achieved before implementation of the ore matching rate of production of the blast furnace; the ore matching efficiency can be adjusted when being not good; the production loss is avoided; the ore matching efficiency can be accurately defined; comparison of the ore matching efficiencies of all ore matching rates can be achieved; the ore matching rate is optimized; reasonable demands proposed by the blast furnace charge structure are fully met before the ore matching rate of the production of the blast furnace comes into service.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a method for measuring the comprehensive charge ore blending efficiency of a blast furnace. technical background [0002] Since the "comprehensive blast furnace charge blending model based on high-basicity sinter" has become a generally recognized blast furnace charge structure model at home and abroad, at present, discussing the ore blending efficiency of blast furnace comprehensive charge is actually discussing "based on high Alkalinity sintered blast furnace comprehensive charge" ore blending efficiency. [0003] The practice of blast furnace production has proved that the "comprehensive blast furnace charge ore blending mode based on high-basic sinter" can obtain better pig iron smelting effect and better technical and economic indicators of blast furnace production, especially the high-basic sinter plus Adding acid pellets plus a proper amount of raw ore, people have formed a fix...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 刘晓丹刘浩
Owner NANJING IRON & STEEL CO LTD
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