Process for producing first-class metallurgical coke by coking coal with high sulphur and high ash

A technology of metallurgical coke and coking coal, which is applied in the production field of primary metallurgical coke and can solve the problem of high cost

Active Publication Date: 2008-10-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in areas where high-quality coking coal resources are scarce, the production of first-clas...

Method used

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  • Process for producing first-class metallurgical coke by coking coal with high sulphur and high ash
  • Process for producing first-class metallurgical coke by coking coal with high sulphur and high ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Coal blending: by weight, 1 / 3JM: anthracite: coal tar pitch is 78:22:3;

[0037] Coal blending accuracy reaches 98.45%;

[0038] 2. Coal fineness and crushing method:

[0039] 92% of coal fineness is below 3mm;

[0040] The process of crushing first and then mixing is adopted. 1 / 3JM is easy to break, and adopts the primary breaking method. Anthracite adopts a three-stage crushing method, that is, pre-crushing is carried out first, the particle size is initially adjusted, and then it enters the coal blending tank for fine crushing with a special hard coal crusher, and finally enters the final crusher together with coking coal for the third crushing.

[0041] 3. Coal moisture content: 10% by weight.

[0042] 4. Asphalt blending: During summer storage, there will be softening and agglomeration, which will affect coal extraction and coal blending operations. The solution is to pre-mix asphalt with a small amount of coal, put it into the warehouse as a coal type, and ...

Embodiment 2

[0049] 1. Coal blending: by weight, 1 / 3JM: anthracite: coal tar pitch is 80:20:5;

[0050] Coal blending accuracy reaches 98.50%;

[0051] 2. Combined coal fineness control and crushing method:

[0052] 93% of coal fineness is below 3mm;

[0053] 3. The moisture content of mixed coal is 11% by weight;

[0054] 4. Tamping: the density of briquettes reaches 1.03;

[0055] Other processes are the same as in Embodiment 1.

[0056] The resulting coke indicators are as follows:

[0057] Analysis Project

[0058] It can be seen from the above table that the coke fully meets the national first-class metallurgical coke standard, and its strength index and thermal performance index are better than the first-class metallurgical coke standard.

Embodiment 3

[0060] 1. Coal blending: 1 / 3JM by weight: anthracite: coal tar pitch is 82:18:7;

[0061] Coal blending accuracy reaches 98.90%;

[0062] 2. With coal fineness control:

[0063] The coal fineness below 3mm accounts for 95%;

[0064] 3. The moisture content of mixed coal is 11% by weight;

[0065] 4. Tamping: the density of briquettes reaches 1.05;

[0066] Other processes are the same as in Embodiment 1.

[0067] The resulting coke indicators are as follows:

[0068] Analysis Project

ad

Std

M40

M25

M10

CRI

CSR

indicators

11.53

0.56

87

92.5

5.8

26

63

[0069] It can be seen from the above table that the coke fully meets the national first-class metallurgical coke standard, and its strength index and thermal performance index are better than the first-class metallurgical coke standard.

[0070]Fatty coal is also a high-sulfur and high-ash coal, characterized by a higher sulf...

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Abstract

The invention discloses a method for utilizing high-sulfur high-ash coking coal to produce first-level metallurgical coke. The method uses high-sulfur high-ash 1/3JM as main material blended with anthracite, adds in pitch as binder, and adopts a tamping-coking process to produce first-level metallurgical coke. The method matches anthracite in proper amount with a coal blending proposal to ensure that the ash content and sulfur content of coke meet the index requirements of first-level metallurgical coke, and adds in the binder to solve the problem that the blended anthracite causes mechanical strength to drop. The method controls the indexes of matched coal fineness, moisture content, coal matching precision and tamping briquette density, and realizes the objective of using the high-sulfur high-ash 1/3JM as main material to produce first-level metallurgical coke through the tamping-coking method.

Description

Technical field: [0001] The invention relates to coal coking production technology, in particular to a production method of primary metallurgical coke. Background technique: [0002] The first-grade metallurgical coke has low ash content, low sulfur content, high mechanical strength, uniform lumpiness and good thermal performance. With the enlargement of ironmaking blast furnaces and the development of oxygen-enriched coal injection technology, the market demand for high-quality coke is increasing. The reserves of high-quality coking coal in my country are limited, and the main coking coal resources suitable for the production of first-grade metallurgical coke are very scarce. At present, in areas where high-quality coking coal resources are scarce, the production of first-class metallurgical coke often requires high-quality main coking coal from other places, which is very expensive. The development and utilization of local resources to produce high-quality first-grade me...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 潘永前李怀国车仁辅刘海军张国桥郭晓晴肖飞王利民李月馨金景良杨振杰刘贵升彭建国
Owner CHNA ENERGY INVESTMENT CORP LTD
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