CN103275741B

CN103275741B - Rammed-coal coking method for proportioned brown coal

Info

Publication number: CN103275741B
Application number: CN201310166499.9A
Authority: CN
Inventors: 龙建新; 张明; 李立; 龙菊兴
Original assignee: YUNNAN COAL & ENERGY Co Ltd
Current assignee: Yunnan Coal & Energy Co., Ltd.
Priority date: 2013-05-08
Filing date: 2013-05-08
Publication date: 2014-09-10
Anticipated expiration: 2033-05-08
Also published as: CN103275741A

Abstract

The invention provides a rammed-coal coking method for proportioned brown coal. The method comprises the following steps: mixing 5-10wt% of brown coal with the Rmax of 0.4-0.6 percent, 10-20wt% of medium coalification degree coal with the Rmax of 0.9-1.2 percent, 40-60wt% of medium coalification degree coal with the Rmax of 1.2-1.5 percent, and 20-30wt% of low coalification degree coal with the Rmax of 1.5-1.7 percent based on the total sum of 100 percent, ramming, curing, feeding the coal into a rammed coke oven, coking for 25-35 hours, and obtaining the qualified coke. According to the method, the coking coal resources are enlarged, the problems that the coking quality is rapidly worsen, the blast furnace ironmaking requirements are difficultly met and the like because the brown coal is doped with the coke in the prior art are effectively solved, the coal resource utilization is enlarged, the coking cost is reduced, and the economic benefits are extremely obvious.

Description

A kind of tamping coking method of proportioning brown coal

Technical field

The present invention relates to a kind of coking process, especially a kind of tamping coking method of proportioning brown coal, belongs to coal tar technical field.

Background technology

Along with the fast development of coking industry, the coal resource day of coking is becoming tight, expensive.Traditional coking coal generally all refers to bituminous coal.Therefore, can be according to 5.5 meters of tamping coke furnace production advantages of large volume, open up non-coking brown coal and participate in coal-blending coking, become expansion coking coal resource, reduce costs, increase the key of economic benefit.But because brown coal are that a kind of degree of coalification is high, carbon content is extremely low, volatile matter, internal moisture are high and without the coal of bonding, participating in process of coking, himself can melting, and shrink greatly, if improper use, by Coke Quality, particularly granularity, intensity index cause destructive impact.Therefore, in conjunction with the production reality of 5.5 meters of tamping coke furnaces, seek one on 5.5 meters of tamping coke furnaces, the non-coking brown coal of adapted carry out the method for tamping coking, are the top priorities of current coking enterprise.

Summary of the invention

Object of the present invention is just to provide a kind of tamping coking method of proportioning brown coal, to make full use of existing lignite resource, and produces blast furnace and produces needed qualified coke.

The present invention completes by following technical proposal: a kind of tamping coking method of proportioning brown coal, is characterized in that through the following step:

A, get the raw materials ready by following proportioning:

Rmax is 0.4～0.6% brown coal 5～10 wt%

Rmax is 0.9～1.2% middle degree of coalification coal 10～20 wt%

Rmax is 1.2～1.5% middle degree of coalification coal 40～60 wt%

Rmax is 1.5～1.7% low rank coal 20～30 wt%

Summation is 100%;

B, each feed coal of steps A is mixed: Rmax is 1.15～1.25%, volatilization is divided into 23～25 wt%, ash content is that 14.0～15.0wt%, caking index are 65～70, final contraction value is the mixing coal that 35～40mm, gelatinous layer maximum dilatation are 13.5～14.5mm;

C, by the mixing coal of step B after routine is made moulding firm by ramming, send in conventional tamping coke furnace, be that 1240～1325 DEG C, coal side temperature are that 1250～1335 DEG C, moulded coal core temperature are that 950～1050 DEG C, peephole pressure are that 6～10pa, collecting main pressure are the condition that 105～115pa, point flue suction force are 230～260pa in coke oven machine side temperature, conventional coking 25～35 hours, cooling through routine, obtaining cold strength M40 is: 83～85%, M10 is: 4～6%, hot strength CRI is: 29～31%, CSR is: 58～62% qualified coke.

Described Rmax(%) be the maximum average reflectance of vitrinite of coal, % is peak area ratio.

The mixing coal particle size of described step B is: granularity is less than accounting for more than 80% of 3mm.

Described conventional tamping coke furnace is 5.5 meters of tamping coke furnaces, and its depth-width ratio is 11:1.

The present invention has following advantages and effect: adopt such scheme, can allocate the maximum average reflectance Rmax of vitrinite into is 0.4～0.6%, and in process of coking, easily cause coke overbreak, the non-coking brown coal that intensity glides, the amount of allocating into is up to 10%, and under above-mentioned suitable carbonization condition, obtaining cold strength M40 is: 83～84%, M10 is: 4～6%, hot strength CRI is: 30～32%, CSR is: 58～60% qualified coke, not only expand coking coal resource, efficiently solving the coke quality that in prior art, brown coal participation coking brings worsens rapidly, be difficult to meet the problems such as blast furnace ironmaking requirement, expand coal resource utilization, reduce coking cost, economic benefit is very remarkable.

Embodiment

Below in conjunction with embodiment, the present invention is described further.

Embodiment 1

A, get the raw materials ready by following proportioning:

Rmax is 0.4% brown coal 5 wt%

Rmax is middle degree of coalification coal 15 wt% of 0.9 %

Rmax is 1.5% middle degree of coalification coal 60 wt%

Rmax is 1.7% low rank coal 20 wt%;

B, the non-coking brown coal of steps A are mixed with all the other each feed coals after, be crushed to granularity and be less than accounting for more than 80% of 3mm: Rmax is 1.25%, volatilization is divided into 23.0 wt%, ash content is that 14.5wt%, caking index are 70, final contraction value is the mixing coal that 36mm, gelatinous layer maximum dilatation are 14.5;

C, by the mixing coal of step B after routine is made moulding firm by ramming, send in 5.5 meters of conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, be that 1325 DEG C, coal side temperature are that 1335 DEG C, moulded coal core temperature are that 990 DEG C, peephole pressure are that 6pa, collecting main pressure are the condition that 105pa, point flue suction force are 260pa in coke oven machine side temperature, conventional coking 25 hours, cooling through routine, obtaining cold strength M40 is: 83%, M10 is: 4%, hot strength CRI is: 30%, CSR is: 60% qualified coke.

Embodiment 2

A, get the raw materials ready by following proportioning:

Rmax is 0.6% brown coal 7 wt%

Rmax is 1.2% middle degree of coalification coal 15 wt%

Rmax is middle degree of coalification coal 53 wt% of 1.2 %

Rmax is low rank coal 25 wt% of 1.5 %;

B, the non-coking brown coal of steps A are mixed with all the other each feed coals after, be crushed to granularity be less than 3mm account for more than 80% after: Rmax is 1.20%, volatilization is divided into 24.0 wt%, ash content is that 14.5wt%, caking index are 68, final contraction value is the mixing coal that 38mm, gelatinous layer maximum dilatation are 14.0;

C, by the mixing coal of step B after routine is made moulding firm by ramming, send in 5.5 meters of conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, be that 1290 DEG C, coal side temperature are that 1300 DEG C, moulded coal core temperature are that 980 DEG C, peephole pressure are that 7pa, collecting main pressure are the condition that 110pa, point flue suction force are 250pa in coke oven machine side temperature, conventional coking 30 hours, cooling through routine, obtaining cold strength M40 is: 84%, M10 is: 6%, hot strength CRI is: 32%, CSR is: the qualified coke of 58 %.

Embodiment 3

A, get the raw materials ready by following proportioning:

Rmax is 0.5% brown coal 10 wt%

Rmax is 1.0% middle degree of coalification coal 10 wt%

Rmax is 1.3% middle degree of coalification coal 50 wt%

Rmax is 1.6% low rank coal 30wt%;

B, the non-coking brown coal of steps A are mixed with all the other each feed coals after, be crushed to granularity be less than 3mm account for more than 80% after: Rmax is 1.15%, volatilization is divided into 25.0 wt%, ash content is that 14.5wt%, caking index are 65, final contraction value is the mixing coal that 40mm, gelatinous layer maximum dilatation are 14.0;

C, by the mixing coal of step B after routine is made moulding firm by ramming, send in 5.5 meters of conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, be that 1240 DEG C, coal side temperature are that 1250 DEG C, moulded coal core temperature are that 980 DEG C, peephole pressure are that 8pa, collecting main pressure are the condition that 115pa, point flue suction force are 240pa in coke oven machine side temperature, conventional coking 35 hours, cooling through routine, obtaining cold strength M40 is: 83%, M10 is: 5%, hot strength CRI is: 31%, CSR is: 59% qualified coke.

Claims

1. a tamping coking method for proportioning brown coal, is characterized in that through the following step:

A, get the raw materials ready by following proportioning:

Rmax is 0.4～0.6% brown coal 5～10 wt%

Rmax is 0.9～1.2% middle degree of coalification coal 10～20 wt%

Rmax is 1.2～1.5% middle degree of coalification coal 40～60 wt%

Rmax is 1.5～1.7% low rank coal 20～30 wt%

Summation is 100%;

B, each feed coal of steps A is mixed,: Rmax is 1.15～1.25%, volatilization is divided into 23～25 wt%, ash content is that 14.0～15.0wt%, caking index are 65～70, final contraction value is the mixing coal that 35～40mm, gelatinous layer maximum dilatation are 13.5～14.5mm, and this mixing coal particle size is: granularity is less than accounting for more than 80% of 3mm;

C, by the mixing coal of step B after routine is made moulding firm by ramming, send in conventional tamping coke furnace, it is 1240～1325 DEG C in coke oven machine side temperature, coal side temperature is 1250～1335 DEG C, moulded coal core temperature is 950～1050 DEG C, peephole pressure is 6～10Pa, collecting main pressure is 105～115Pa, divide the condition that flue suction force is 230～260Pa, conventional coking 25～35 hours, cooling through routine, obtaining cold strength M40 is: 83～85%, M10 is: 4～6%, hot strength CRI is: 29～31%, CSR is: 58～62% qualified coke, described conventional tamping coke furnace is 5.5 meters of tamping coke furnaces, its depth-width ratio is 11:1,