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A coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke

A technology of average particle size and particle size distribution, which is applied in the field of metallurgy, can solve the problems of coal blending in the coking coal market, increasing the difficulty of using coking coal, coal quality control and coke quality adjustment, etc., to achieve low professional requirements and optimize particle size The effect of easy distribution and operation

Active Publication Date: 2021-05-28
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. Affected by coal-forming conditions, market and other factors, the coking coal market is seriously mixed with coal, which intensifies the difficulty of using coking coal, brings great uncertainty to various production and use units, and affects the control of coal quality. And coke quality regulation brings more difficulties

Method used

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  • A coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke
  • A coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke
  • A coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Determination of coke quality indicators for each coking single coal used in production, coking coal inertness capacity index (including: total expansion degree, inertness volume, inertness rate, maximum inertness capacity), coal micro-inertity group Coal content index, initial softening temperature, solidification temperature, single coal coke quality index (including: strength after reaction, coke particle size), according to the measurement results of single coal-coke quality index, carry out the following coal blending plan formulation steps:

[0045] (1) Coal microscopically inert component content 01 ≤8% Y 1 1 type of briquette, with a mass ratio of 15%;

[0046] (2) Coal microscopic inert component content 8% 2 ≤15% Y 2 One type of briquette, with a mass ratio of 20%;

[0047] (3) The content of coal microscopically inert components is 15%3 ≤35%, Y 3 2 kinds of briquettes (Y 3-1 , Y 3-2 ), the mass ratio is 45% (in which Y 3-1 15%, Y 3-2 20%);

[0048]...

Embodiment 2

[0053] 1. Determination of coke quality indicators for each coking single coal used in production, coking coal inertness capacity index (including: total expansion degree, inertness volume, inertness rate, maximum inertness capacity), coal micro-inertity group Coal content index, initial softening temperature, solidification temperature, single coal coke quality index (including: strength after reaction, coke particle size), according to the measurement results of single coal-coke quality index, carry out the following coal blending plan formulation steps:

[0054] (1) Coal microscopically inert component content 01 ≤8% Y 1 One type of briquette, with a mass ratio of 25%;

[0055] (2) Coal microscopic inert component content 8%2 ≤15% Y 2 1 type of briquette, with a mass ratio of 15%;

[0056] (3) The content of coal microscopically inert components is 15%3 ≤35%, Y 3 2 kinds of briquettes (Y 3-1 , Y 3-2 ), the mass ratio is 25% (where Y 3-1 15%, Y 3-2 20%);

[0057] (4)...

Embodiment 3

[0064] 1. Measure the coke quality index of each coking single coal used in production, draw a single coal-coke quality index comparison table, and determine the coal blending plan as follows:

[0065] (1) Coal microscopically inert component content 01 ≤8% Y 1 One type of briquette, with a mass ratio of 20%;

[0066] (2) Coal microscopic inert component content 8% 2 ≤15% Y 2 One type of briquette, with a mass ratio of 20%;

[0067] (3) The content of coal microscopically inert components is 15%3 ≤35%, Y 3 2 kinds of briquettes (Y 3-1 , Y 3-2 ), the mass ratio is 30% (where Y 3-1 15%, Y 3-2 20%);

[0068] (4) Coal microscopically inert component content 35% 4 ≤45% Y 4 One type of briquette, with a mass ratio of 20%;

[0069] (5) Select coal micro-inert component content 45%5 ≤60% of Y 5 1 type of briquette, with a mass ratio of 10%;

[0070] 2. Sampling according to the coal type and proportion determined in step 1, mixing and pulverizing, and measuring the coal mic...

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Abstract

The invention relates to a coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke. Coal quality indicators are measured for each coking single coal used in production. The various coal types determined by quantitative indicators such as microscopically inert component content, maximum capacity for inertness, capacity for inertness, initial softening temperature, and solidification temperature are formulated into blended coal according to the mass ratio, so that the blended coal meets the content of microscopically inert components in coal. 17% ≤ X0 ≤ 30%, the maximum capacity index L satisfies 35 ≤ L ≤ 50, the total expansion degree is 100-350, and the coal blending plan is defined as coking if the test coking verification result index reaches the coking production coke index requirement range Coal blending scheme for production. The invention increases the average particle size of the coke, optimizes the distribution of the particle size of the coke, and improves the gas permeability of the coke in the charge of the blast furnace.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a coking coal blending method for increasing the average coke particle size and improving the coke particle size distribution. Background technique [0002] Coke is widely used in blast furnace ironmaking and non-ferrous metal smelting, and is also used as a raw material in calcium carbide production, gasification, and synthetic chemistry. Coke for different purposes has its specific requirements. The metallurgical coke used in blast furnace ironmaking production is called blast furnace coke, which is a high-temperature coke formed by heating bituminous coal to 950-1050°C in a chamber coke oven. [0003] Coke mainly plays the four roles of heat supply, reducing agent, skeleton and carbon supply in the blast furnace. In recent years, in order to reduce coke consumption, increase blast furnace output, and improve pig iron quality, enhanced technologies such as blowing coal powder at the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22C10B53/04G01N21/84
CPCC10B53/04G01N21/84G01N33/222
Inventor 王超庞克亮谭啸刘冬杰朱庆庙武吉张军姜喆蔡秋野刘福军
Owner ANGANG STEEL CO LTD
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