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Method for coal blending coking through utilizing Gieseler fluidity index

A coking technology based on Gie's fluidity and coal blending, applied in coking ovens, petroleum industry, etc., can solve the problems of heavy testing workload and long test period

Inactive Publication Date: 2014-03-19
SHANGHAI MEISHAN IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

It mainly solves technical problems such as multi-indicator coal blending involving multiple independent variables, heavy testing workload, and long test period

Method used

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Embodiment Construction

[0020] Coal blending and coking is carried out by using Gibson's fluidity index, using a 6m top-loaded coal coke oven for coking, and cooling with nitrogen after the coke is discharged. It is required to obtain metallurgical coke with higher strength. Overall coal blending plan: 1 / 3 coking coal 10-15%, gas coal 22-30%, fat coal 20-25%, coking coal 30-38%, lean coal 0-5%. Specifically, No. 1 to No. 4 coal blending schemes as shown in Table 1 are determined. It is required to obtain blended coal ash content of 9-10%, sulfur content of 0.8-0.9%, LGMF value of 2.2-3.0, maximum fluidity temperature of 437°C-442°C, coke crushing strength M40 obtained above 85%, and wear resistance strength of 6.8 %the following. The coking process includes the following steps:

[0021] The first step is to blend coal according to the mass percentage shown in Table 1 to make it evenly mixed.

[0022] The second step is to take a blended coal sample for process testing, and adjust the proportion ap...

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Abstract

The invention relates to a coal blending coking method, and especially relates to a method for coal blending coking through utilizing a Gieseler fluidity index to mainly solve technical problems of heavy workload, long test period and the like existing in the application of multiple index coal blending which simultaneously relates to many independent variables. The method comprises the following steps: 1, carrying out coal blending according to the following mass percentages: 10-15% of 1 / 3 coking coal, 22-30% of gas coal, 20-25% of rich coal, 30-38% of coking coal and 0-5% of lean coal; 2, combining with coal quality control to make the combined coal ash percentage be 9-10%, the sulfur percentage be 0.8-0.9%, the logarithm value of the largest fluidity be 2.2-3.0 and the largest fluidity temperature of the Gieseler fluidity be 437-442DEG C; 3, fragmenting the obtained mixed coal: fragmenting the mixed coal obtained after the coal combination in step 2; 4, coking: sending the fragmented mixed coal to a coal coking furnace, and coking for 17-21h according to a coke cake center temperature of 950-1050DEG C; and 5, cooling after coke discharging, and carrying out coke quality detection.

Description

technical field [0001] The invention relates to a coal blending coking method, in particular to a method for coal blending coking by using the Girdler fluidity index. Background technique [0002] With the enlargement of blast furnaces and the development and application of technologies such as oxygen-enriched injection, the requirements for the quality of coke produced in blast furnaces are getting higher and higher. Stabilizing and improving the quality of coke has become one of the main issues facing the coking industry. Coal blending is a relatively complicated process. At present, there are generally three methods of coking coal blending, namely empirical coal blending method, multi-index coal blending method and expert system coal blending method. [0003] The empirical coal blending method is based on the empirical blending ratio, using coal types with similar properties to replace the coal types that have been used. This coal blending method is often difficult to ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04C10B57/00
Inventor 王春花张文成任学延
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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