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Coal blending and coking method for metallurgical coke

A technology for blending coal for coking and metallurgical coking, applied in coke ovens, petroleum industry and other directions, can solve problems such as single coal type, and achieve the effects of reduced coal cost, low ash content, and low sulfur content

Inactive Publication Date: 2005-08-03
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there has been a method of coking with weakly caking coal and non-caking coal blending coal, such as a "coal blending method for producing high-quality foundry coke with weakly caking coal" disclosed in Chinese Patent Publication CN1140196A, but the method does not The type of coal blended is relatively simple, and the coke produced is foundry coke rather than coke for blast furnace ironmaking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Embodiments of the invention are as follows:

[0012] Using the conventional coking process, mix the coking coal blending raw materials evenly and put them into the furnace. The raw material components of the coking coal blending are by weight, and the examples are shown in the following table:

[0013] Weak caking coal Thermal coal Gas coal Fatty coal Coking coal M 40 m 10

[0014] 1) 15% 0 30% 10% 45% 78.1% 8.1%

[0015] 2) 14.3% 10% 23.7% 9.5% 42.5% 78.7% 7.9%

[0016] 3) 0 5% 40% 10% 45% 78.1% 7.9%

[0017] 4) 0 5% 45% 10% 40% 78.1% 7.9%

[0018] 5) 14.3% 10% 13.7% 19.5% 42.5% 78.4% 8.6%

[0019] Reflectivity(%)

Reflectance distribution (%)

the biggest

the smallest

Rmax

＜0.75

0.75～0.95

0.95～1.35

＞1.35

weak caking coal

0.8860

0.4548

0.5933

92

8

-

-

thermal coal

0.9823

0.4193

0.6240

77.5

22.5

...

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PUM

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Abstract

The present invention relates to coal blending and coking method for metallurgical coke, and especially the coal blending and coking method with thermal coal and weakly caking coal. The present invention adopts conventional coking process and the coal consists of weakly caking coal 0-15 wt%, thermal coal 0-10 wt%, gas coal 13-45 wt%, fatty coal 9-20 wt% and coking coal 40-45 wt%. The produced coke has dropping strength M40 of 77-78.5 %, abrasion resistance strength M10 <8.6 %, reactivity of 35-37 %, thermal state strength of 45-55 %, and granularity of 25-40 mm and 40-80 mm, and meets the requirement for iron smelting in blast furnace of 1000 cubic meter or larger. The present invention has expanded coal variety range for coking, and lowered coking cost.

Description

technical field [0001] The invention relates to a coal blending coking method using thermal coal and weak caking coal, in particular to a coal blending coking method for metallurgical coke. Background technique [0002] Due to insufficient supply of high-quality coking coal and limited resources, saving high-quality coking coal and expanding the proportion of non-coking coal in coking coal blending have become important issues to be solved in current coal blending and coking. In the prior art, there is a method of coking with weakly caking coal and non-caking coal blending coal, such as a "coal blending method for producing high-quality foundry coke with weakly caking coal" disclosed in Chinese Patent Publication CN1140196A, but the method does not The type of coal blended is relatively simple, and the coke produced is foundry coke rather than coke for blast furnace ironmaking. Coke for blast furnace ironmaking, that is, metallurgical coke, has relatively higher requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
Inventor 郑烈袁万能薛改凤冯进李安平郝晋张前香蒋旭东许传智
Owner 武钢集团有限公司
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