Method for producing first-grade metallurgical coke using high-sulfur and high-ash coking coal

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

Active Publication Date: 2011-11-30
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-class metallurgical coke often requires high-quality main coking coal from other places, which is very expensive

Method used

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  • Method for producing first-grade metallurgical coke using high-sulfur and high-ash coking coal
  • Method for producing first-grade metallurgical coke using high-sulfur and high-ash coking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Coal blending: According to the weight ratio, 1 / 3JM: anthracite: coal tar pitch is 78:22:3;

[0038] The coal blending accuracy reaches 98.45%;

[0039] 2. Cooperate with coal fineness and crushing method:

[0040] The coal fineness below 3mm accounts for 92%;

[0041] The process of breaking first and then mixing is adopted. 1 / 3JM is easy to be broken, and the first-level crushing method is adopted. Anthracite adopts a three-stage crushing method, that is, pre-crushing, preliminary adjustment of particle size, then entering the coal blending tank, using a special hard coal crusher for fine crushing, and finally entering the final crusher together with coking coal for the third crushing.

[0042] 3. With coal moisture: 10% by weight.

[0043] 4. Mixing of bitumen: When stored in summer, it will soften and agglomerate, which will affect coal extraction and coal blending operations. The solution is to pre-mix bitumen with a small amount of coal and store it as a coal type, and ...

Embodiment 2

[0050] 1. Coal blending: according to the weight ratio, 1 / 3JM: anthracite: coal tar pitch is 80:20:5;

[0051] The coal blending accuracy reaches 98.50%;

[0052] 2. Cooperate with coal fineness control and crushing method:

[0053] The coal fineness below 3mm accounts for 93%;

[0054] 3. The coal moisture is 11% by weight;

[0055] 4. Tamping: the density of briquettes reaches 1.03;

[0056] The other processes are the same as in the first embodiment.

[0057] The obtained coke indicators are as follows:

[0058] Analysis Project Ad Std M40 M25 M10 CRI CSR index 11.20 0.53 86.5 92.5 5.8 26 63

[0059] It can be seen from the above table that the coke fully meets the national first-level metallurgical coke standard, and its strength index and thermal performance index are better than the first-level metallurgical coke standard.

Embodiment 3

[0061] 1. Coal blending: 1 / 3JM: anthracite: coal tar pitch in parts by weight 82:18:7;

[0062] The coal blending accuracy reaches 98.90%;

[0063] 2. Cooperate with coal fineness control:

[0064] The coal fineness below 3mm accounts for 95%;

[0065] 3. The moisture content of the coal is 11% by weight;

[0066] 4. Tamping: the density of briquettes reaches 1.05;

[0067] The other processes are the same as in the first embodiment.

[0068] The obtained coke indicators are as follows:

[0069] Analysis Project Ad Std M40 M25 M10 CRI CSR index 11.53 0.56 87 92.5 5.8 26 63

[0070] It can be seen from the above table that the coke fully meets the national first-level metallurgical coke standard, and its strength index and thermal performance index are better than the first-level metallurgical coke standard.

[0071] Fat coal is also a kind of high-sulfur and high-ash coal. Its characteristic is that the sulfur index is higher than 1 / 3JM, and other indexes are better than 1 / 3...

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Abstract

The invention discloses a method for producing first-grade metallurgical coke by utilizing high-sulfur and high-ash coking coal. The invention mainly uses high-sulfur and high-ash 1 / 3 JM, mixes anthracite, adds binder pitch, and uses tamping coking coke The process produces first-grade metallurgical coke. In the present invention, an appropriate amount of anthracite is blended into the coal blending scheme to make the ash and sulfur content of the coke meet the first-grade metallurgical coke index requirements, and a binder is added to solve the problem of mechanical strength reduction caused by the blending of the anthracite. The invention controls the coal fineness, moisture, coal blending accuracy, and tamping coal cake density index, and realizes the production of first-grade metallurgical coke with high sulfur and high ash 1 / 3JM mainly through the tamping coking method the goal of.

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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Patent Type & Authority Patents(China)
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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