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Method for producing high-quality metallurgical coke by using non-caking coal

A technology for the production of metallurgical and non-caking coal, which is applied in coking ovens and the petroleum industry, and can solve problems such as low coke strength, failure to meet metallurgical coke indicators, and no mention of coke thermal strength, sulfur and ash indicators, etc. Achieve the effect of reducing coke cost, improving economic and social benefits, and expanding coking coal resources

Active Publication Date: 2020-02-11
邢台旭阳科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described in the patent CN106281387, low-rank coal is blended with coking coal and coking auxiliary materials by tamping and top loading. Although the proportion of low-rank coal can reach 35%-80%, the main production of gasification coke , chem

Method used

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  • Method for producing high-quality metallurgical coke by using non-caking coal
  • Method for producing high-quality metallurgical coke by using non-caking coal
  • Method for producing high-quality metallurgical coke by using non-caking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Shenmu non-caking coal is selected, wherein Mt is 12 mass%, sulfur St is 0.24 mass%, ash Ad is 4.5 mass%, volatile Vdaf is 36.0 mass%, and G value is 0.

[0037] Coal blending according to the scheme in Table 1 below, wherein scheme 1 is not equipped with non-caking coal, and based on the total mass of all raw coal used, scheme 2 and scheme 3 are respectively equipped with 3% and 6% non-caking coal.

[0038] according to figure 1 Method Mix the non-caking coal and coking coal evenly with water, crush it into blended coal with a fineness of 91.3%, and then tamp the blended coal to a bulk density of 1.1t / m3 , into the coke oven carbonization chamber, isolated from the air and heated to 1000±50°C, the coking time is 25h, and the coke is quenched by wet method. Table 2 and Table 3 are respectively the coal index and price of each scheme and the coke quality index of each scheme.

[0039] Table 1 Test plan

[0040]

[0041] Table 2 Coal indicators and prices of various ...

Embodiment 2

[0047] Shenmu non-caking coal is selected, Mt is 12 mass%, sulfur St is 0.24 mass%, ash Ad is 4.5 mass%, volatile Vdaf is 36.0 mass%, and G value is 0.

[0048] According to the coal blending scheme in Table 4 below, based on the quality of all raw coal used, scheme 4 and scheme 5 are respectively equipped with 6% and 10% non-caking coal.

[0049] according to figure 2 The method is to crush the non-caking coal to a fineness of 88.7%, wherein the mass ratio of the crushed non-caking coal with a particle size of less than 0.5-3mm is 83.5%; to mix and crush two or more other coking coals to a fineness of 88.5%; Mix pulverized non-caking coal with pulverized coking coal and add water to obtain blended coal, and then tamp the blended coal to a bulk density of 1.1t / m 3 , into the coke oven carbonization chamber, isolated from the air and heated to 1000±50°C, the coking time is 25h, and the coke is quenched by wet method. Table 5 and Table 6 respectively show the matching coal in...

Embodiment 3

[0058] Shenmu non-caking coal is selected, Mt is 12 mass%, sulfur St is 0.24 mass%, ash Ad is 4.5 mass%, volatile Vdaf is 36.0 mass%, and G value is 0.

[0059] Coal blending according to the scheme in Table 7 below, based on the quality of all raw coal used, scheme 6 and scheme 7 are respectively equipped with 10% and 15% non-caking coal.

[0060] according to image 3 The method is to crush the non-caking coal to a fineness of 90.5%; crush 1 / 3 coking coal and lean coal to a mixed coal with a fineness of 89.6%; mix the two, and then mix them with coking coal and fat coal and add water to obtain blended coal ; and tamping the blended coal to a bulk density of 1.1t / m 3 , into the coke oven carbonization chamber, isolated from the air and heated to 1000±50°C, the coking time is 25h, and the coke is quenched by wet method. Table 8 and Table 9 respectively show the matching coal index and price of each scheme and the coke quality index of each scheme.

[0061] Table 7 Test plan...

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Abstract

The invention provides a method for producing high-quality metallurgical coke by using non-caking coal. The method comprises: adding water into non-caking coal and coking coal, uniformly mixing, crushing into blended coal with a fineness of 90-92%, tamping the blended coal until the bulk density is 1.0-1.1 t/m<3>, putting into a coke oven carbonization chamber, heating to 1000+/-50 DEG C in the absence of air, coking for 25 h, and quenching coke by adopting a wet method. According to the method disclosed by the invention, by optimizing the coal blending structure, precisely controlling the fineness, the volatile matter, the vitrinite content, the ash content, the sulfur content and other indexes of the blended coal and combining tamping and fine crushing, the non-caking coal is applied tothe coal blending coking, so that the coke cost is greatly reduced while the high-quality coke is produced.

Description

technical field [0001] The invention belongs to the field of coking coal blending, and in particular relates to a method for producing high-quality metallurgical coke by utilizing non-caking coal. Background technique [0002] Bituminous coal is heated to 950-1050°C in the absence of air, and finally made into coke after drying, pyrolysis, melting, bonding, solidification, shrinkage and other stages. This process is called high-temperature coking (high-temperature dry distillation). Coke obtained from high temperature coking is used for blast furnace smelting, casting and gasification. Metallurgical coke is a general term for blast furnace coke, foundry coke, ferroalloy coke and nonferrous metal smelting coke. Since more than 90% of metallurgical coke is used in blast furnace ironmaking, blast furnace coke is often called metallurgical coke. [0003] In my country's more than 1 trillion coal reserves, non-coking coal accounts for more than 70%, of which non-caking coal is ...

Claims

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Application Information

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IPC IPC(8): C10B57/04
CPCC10B57/04
Inventor 任华伟杨洪庆曾志春孙国雷张寸暖杨磊路利宾王华东董素文
Owner 邢台旭阳科技有限公司
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