CN105255509A

CN105255509A - Coking coal blending method

Info

Publication number: CN105255509A
Application number: CN201510761209.4A
Authority: CN
Inventors: 彭永根; 蒋友源; 肖富春; 刘翔宇; 周云花; 胡小龙
Original assignee: Hunan Hualing Xiangtan Iron and Steel Co Ltd
Current assignee: Hunan Valin Xiangtan Iron and Steel Co Ltd; Hunan Hualing Xiangtan Iron and Steel Co Ltd
Priority date: 2015-11-10
Filing date: 2015-11-10
Publication date: 2016-01-20
Anticipated expiration: 2035-11-10
Also published as: CN105255509B

Abstract

The invention discloses a coking coal blending method. All coking coal includes, by weight, 5% to 10% of high-sulfur 25# coking coal, 8% to 15% of low-sulfur Russia lean coking coal, 5% to 10% of first-type main coke, 8% to 12% of second-type main coke, 6% to 8% of third-type main coke, 15% to 18% of fat coal, 25% to 30% of 1/3 coking coal, 3% to 6% of gas coal and 0% to 5% of lean coal. The sulfur content of mixed coal is controlled below 0.8%, the coking coarse grain mosaic structure proportion is more than 35%, and the coking fiber structure proportion is below 13%. All the coking coal is blended to prepare the mixed coal, the use amount of low-price high-sulfur 25# coking coal can be increased, coal resources are reasonably utilized, coal blending cost is reduced, under the technological conditions of 4.3-m and 6-m coke oven top-charging coke ovens, full dry quenching and step crushing avoidance, the smelted coke M40 is more than 86%, the smelted coke M10 is below 6.5%, and the CSR is more than 64%.

Description

A kind of coke making and coal blending method

Technical field

The invention belongs to Coking Coal Blending Technology field, be specifically related to the coke making and coal blending method that the thin coking coal of a kind of high-sulfur 25# coking coal and low-sulfur Russia participates in.

Technical background

Steel industry production capacity surplus in recent years, economic benefit glides, and the coke-oven plant as Steel Complex faces the urgent task reducing coal blending cost.But in order to ensure the steady running of blast furnace system low cost, while reduction coal blending cost, ensure that coke quality does not decline.High sulphur coal price is low, and improving high sulphur coal proportioning is one of approach reducing coal blending cost.

Summary of the invention

Technical problem to be solved by this invention is to provide the coke making and coal blending method that the thin coking coal of a kind of high-sulfur 25# coking coal and low-sulfur Russia participates in, the method can improve high-sulfur coking coal proportioning at a low price, reduce high price high-quality coking coal proportioning, reduce coal blending cost, and can coke quality be improved.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A kind of coke making and coal blending method, coking coal comprises:

High-sulfur 25# coking coal, sulfur in 2.0 ~ 2.5% scopes, caking index more than 70 and coking coarse grain pattern structure more than 50%;

The thin coking coal of low-sulfur Russia, sulfur less than 0.3%, caking index more than 70 and coking fibrous texture reaches more than 60%;

Main Jiao of one class, coking coarse grain pattern structure more than 60%;

Main Jiao of two classes, coking coarse grain pattern structure 50 ~ 60%;

Main Jiao of three classes, coking coarse grain pattern structure 30 ~ 50%;

Rich coal, dry ash-free basis fugitive constituent V _daf< 32%, maximum thickness of plastic layer Y value > 25mm;

/ 3rd coking coal, caking index>=80, dry ash-free basis fugitive constituent V _daf35 ~ 39%;

Bottle coal, caking index 50 ~ 85, dry ash-free basis fugitive constituent V _daf28 ~ 39%;

Lean coal, caking index 15 ~ 60;

Each coking coal weight percent is: high-sulfur 25# coking coal 5% ~ 10%, thin coking coal 8% ~ 15%, class main burnt 5% ~ 10% of low-sulfur Russia, two classes main burnt 8% ~ 12%, three classes main burnt 6% ~ 8%, rich coal 15% ~ 18%, / 3rd coking coal 25% ~ 30%, bottle coal 3% ~ 6%, lean coal 0% ~ 5%; The sulfur of mixed coal controls below 0.8%, coking coarse grain pattern structure ratio is more than 35%, coking fibrous texture ratio is less than 13%.

The present invention with mixed coal sulfur and coking microstructure for Con trolling index, by regulating the thin coking coal of low-sulfur Russia in mixed coal, lean coal, main Jiao of one class, main Jiao of two classes, main Jiao of three classes, rich coal, the consumption of 1/3rd coking coal and bottle coal, not only can increase high-sulfur 25# Blending of Coking Coals at a low price, main Jiao of high price one class can also be reduced, the main burnt proportioning of two classes, Appropriate application ature of coal resource, significantly reduce coal blending cost, and at 4.3 meters, 6 meters of coke oven top dress coke ovens, absolutely dry quenching, without under the processing condition of graded crushing, institute coking charcoal M40 reaches more than 86%, M10 reaches less than 6.5%, CSR reaches more than 64%.

Embodiment

Be described in further detail Relational Questions of the present invention below in conjunction with embodiment, following examples are explanation of the invention, and the present invention is not limited to following examples.

The coke making and coal blending method that the thin coking coal of high-sulfur 25# coking coal of the present invention and low-sulfur Russia participates in, comprise the step of high-sulfur 25# coking coal, the thin coking coal of low-sulfur Russia, main Jiao of a class, main Jiao of two classes, main Jiao of three classes, rich coal, 1/3rd coking coal, bottle coal, lean coal mixture, each single grade coal technical analysis the results are shown in Table 1.

Table 1 single grade coal coal analysis result

Each coking coal weight percent is: high-sulfur 25# coking coal 5 ~ 10%; The thin coking coal 8% ~ 15% of low-sulfur Russia; One class main burnt 5% ~ 10%; Two classes main burnt 8% ~ 12%; Three classes main burnt 6% ~ 8%; Rich coal: 15% ~ 18%; / 3rd coking coal: 25% ~ 30%; Bottle coal: 3% ~ 6%; Lean coal: 0% ~ 5%; The sulfur of mixed coal controls below 0.8%, coking coarse grain pattern structure ratio is more than 35%, coking fibrous texture ratio is less than 13%.

The specific embodiment of Coal Blending Schemes is in table 2.

Table 2 Coal Blending Schemes

Example 1,2,3 gained coke all 4.3 meters, 6 meters coke oven tops dress coke ovens, absolutely dry quenching, without the processing condition of graded crushing under obtain.Coordinate the quality examination situation of matchmaker in table 3.

Table 3 mixed coal and coke quality

Claims

1. a coke making and coal blending method, coking coal comprises:

Main Jiao of one class, coking coarse grain pattern structure more than 60%;

Main Jiao of two classes, coking coarse grain pattern structure 50 ~ 60%;

Main Jiao of three classes, coking coarse grain pattern structure 30 ~ 50%;

Lean coal, caking index 15 ~ 60;

It is characterized in that: each coking coal weight percent is high-sulfur 25# coking coal 5% ~ 10%, thin coking coal 8% ~ 15%, class main burnt 5% ~ 10% of low-sulfur Russia, two classes main burnt 8% ~ 12%, three classes main burnt 6% ~ 8%, rich coal 15% ~ 18%, / 3rd coking coal 25% ~ 30%, bottle coal 3% ~ 6%, lean coal 0% ~ 5%; The sulfur of mixed coal controls below 0.8%, coking coarse grain pattern structure ratio is more than 35%, coking fibrous texture ratio is less than 13%.