CN103224804A - Proportioned Australian weakly caking coal coking method - Google Patents
Proportioned Australian weakly caking coal coking method Download PDFInfo
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- CN103224804A CN103224804A CN2013101665192A CN201310166519A CN103224804A CN 103224804 A CN103224804 A CN 103224804A CN 2013101665192 A CN2013101665192 A CN 2013101665192A CN 201310166519 A CN201310166519 A CN 201310166519A CN 103224804 A CN103224804 A CN 103224804A
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Abstract
The invention provides a proportioned Australian weakly caking coal tamping coking method. The method comprises the following steps: mixing 5-15wt% of Australian weakly caking coal having an Rmax of 0.5-0.7%, 10-15wt% of medium-coalification-degree coal having an Rmax of 0.9-1.2%, 55-75wt% of medium-coalification-degree coal having an Rmax of 1.2-1.5% and 10-15wt% of medium-coalification-degree coal having an Rmax of 1.5-1.7%, wherein the sum of the weight percentages of the above raw materials is 100%; carrying out tamping molding; sending to a tamping coking furnace; and coking for 25-35h to obtain qualified coke. The coking coal resource is enlarged, and problems comprising rapid deterioration of the quality of the coke, difficult satisfying of blast furnace iron making requirements and the like caused by the participation of the Australian weakly caking coal in coking in the prior art are effectively solved. The method has the advantages of coal resource utilization enlargement, coking cost reduction, and extremely substantial economic benefit.
Description
Technical field
The present invention relates to a kind of coking process, the tamping coking method of especially a kind of proportioning Australia weakly caking coal belongs to the coal tar technical field.
Background technology
Along with the fast development of coking industry, the supply day of domestic coking coal is becoming tight, and costs an arm and a leg, and causes the coal resource price to become the most expensive in the world coal resource.Therefore, can open up the cheap weakly caking coal of external price and participate in coal-blending coking, become the expansion coking coal resource, reduce cost, increase back the key of economic benefit according to 5.5 meters tamping coke furnace production advantages of big volume.Because external weakly caking coal is a kind of low degree of coalification, low carbon content, medium, the low coal that bondd of volatile matter, in participating in process of coking, if improper use, particularly granularity, intensity index cause destructive influence with the STRENGTH ON COKE quality.Therefore, in conjunction with the production reality of 5.5 meters tamping coke furnaces, seek a kind ofly on 5.5 meters tamping coke furnaces, adapted Australia weakly caking coal carries out the method for tamping coking, is the top priority of current coking enterprise.
Summary of the invention
Purpose of the present invention just provides the method that a kind of proportioning Australia weakly caking coal carries out tamping coking, to make full use of the cheap weakly caking coal resource of external price, produces blast furnace and produces needed qualified coke.
The present invention finishes by following technical proposal: the tamping coking method of a kind of proportioning Australia weakly caking coal is characterized in that through the following step:
A, get the raw materials ready by following proportioning:
Rmax is Australia weakly caking coal 5～15 wt% of 0.5～0.7%
Rmax is 0.9～1.2% middle degree of coalification coal 10～15 wt%
Rmax is 1.2～1.5% middle degree of coalification coal 55～75 wt%
Rmax is 1.5～1.7% low rank coal 10～15 wt%
Summation is 100%;
B, each feed coal of steps A is mixed: Rmax is 1.20～1.30%, volatilization is divided into 22～25 wt%, ash content is that 14.0～15.0wt%, caking index are 65～70, final contraction value is that 35～40mm, gelatinous layer maximum dilatation are the mixed coal of 13.5～14.5mm;
C, make the mixing coal of step B firm by ramming moulding routinely after, send in the conventional tamping coke furnace, in the coke oven machine side temperature is that 1250～1335 ℃, coal side temperature are that 1260～1345 ℃, moulded coal core temperature are that 950～1050 ℃, peephole pressure are that 5～8pa, collecting main pressure are 100～120pa, to divide flue suction force be the condition of 235～265pa, conventional coking 25～35 hours, cool off through routine, obtaining cold strength M40 is: 83～85%, M10 is: 4～6%, hot strength CRI is: 29～31%, and CSR is: 58～62% qualified coke.
Described Rmax(%) be the maximum average reflectance of vitrinite of coal, % is a peak area ratio.
The mixing coal particle size of described step B is: granularity accounts for more than 80% less than 3mm's.
Described conventional tamping coke furnace is 5.5 meters tamping coke furnaces, and its depth-width ratio is 11:1.
The present invention has following advantage and effect: adopt such scheme, can allocate the maximum average reflectance Rmax of vitrinite into is 0.5～0.7%, and Australia Lan Shui 4# weakly caking coal that in process of coking, easily causes coke overbreak, intensity to glide, the amount of allocating into is up to 15%, and under above-mentioned suitable coking condition, acquisition cold strength M40 is: 83～85%, and M10 is: 4～6%, hot strength CRI is: 29～31%, and CSR is: 58～62% qualified coke.Not only enlarge coking coal resource, and efficiently solve Australia weakly caking coal in the prior art and participate in the coke quality that coking brought and worsen rapidly, be difficult to satisfy problems such as blast furnace ironmaking requirement, enlarged the coal resource utilization, reduced the 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 Australia Lan Shui 4# weakly caking coal 5 wt% of 0.5%
Rmax is 0.9% middle degree of coalification coal 20 wt%
Rmax is 1.5% middle degree of coalification coal 60 wt%
Rmax is 1.7% low rank coal 15 wt%;
B, Australia Lan Shui 4# weakly caking coal of steps A and all the other each feed coals mixed after, be crushed to granularity 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 65, final contraction value is that 35mm, gelatinous layer maximum dilatation are 14.5 mixing coal;
C, make the mixing coal of step B firm by ramming moulding routinely after, send in 5.5 meters conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, in the coke oven machine side temperature is that 1335 ℃, coal side temperature are that 1345 ℃, moulded coal core temperature are that 980 ℃, peephole pressure are that 6pa, collecting main pressure are 100pa, to divide flue suction force be the condition of 265pa, conventional coking 25 hours, cool off through routine, obtaining cold strength M40 is: 83%, M10 is: 4%, hot strength CRI is: 29%, and CSR is: 58% qualified coke.
Embodiment 2
A, get the raw materials ready by following proportioning:
Rmax is Australia Lan Shui 4# weakly caking coal 10 wt% of 0.7%
Rmax is 1.2% middle degree of coalification coal 15 wt%
Rmax is 1.2% middle degree of coalification coal 60 wt%
Rmax is 1.5% low rank coal 15 wt%;
B, Australia Lan Shui 4# weakly caking coal of steps A and all the other each feed coals mixed after, be crushed to granularity less than 3mm account for more than 80% after: Rmax is 1.25%, volatilization is divided into 23.0 wt%, ash content is that 14.5wt%, caking index are 67, final contraction value is that 37mm, gelatinous layer maximum dilatation are 14.0 mixing coal;
C, make the mixing coal of step B firm by ramming moulding routinely after, send in 5.5 meters conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, in the coke oven machine side temperature is that 1300 ℃, coal side temperature are that 1310 ℃, moulded coal core temperature are that 990 ℃, peephole pressure are that 7pa, collecting main pressure are 110pa, to divide flue suction force be the condition of 250pa, conventional coking 30 hours, cool off through routine, obtaining cold strength M40 is: 85%, M10 is: 6%, hot strength CRI is: 31%, and CSR is: 62% qualified coke.
Embodiment 3
A, get the raw materials ready by following proportioning:
Rmax is Australia Lan Shui 4# weakly caking coal 15 wt% of 0.6%
Rmax is 1.1% middle degree of coalification coal 10 wt%
Rmax is 1.3% middle degree of coalification coal 70 wt%
Rmax is 1.6% low rank coal 5 wt%;
B, Australia Lan Shui 4# weakly caking coal of steps A and all the other each feed coals mixed after, be crushed to granularity less than 3mm account for more than 80% after: Rmax is 1.30%, volatilization is divided into 23.0 wt%, ash content is that 14.5wt%, caking index are 70, final contraction value is that 38mm, gelatinous layer maximum dilatation are 14.0 mixing coal;
C, make the mixing coal of step B firm by ramming moulding routinely after, send in 5.5 meters conventional tamping coke furnaces, the depth-width ratio of this coke oven is 11:1, in the coke oven machine side temperature is that 1250 ℃, coal side temperature are that 1260 ℃, moulded coal core temperature are that 970 ℃, peephole pressure are that 5pa, collecting main pressure are 120pa, to divide flue suction force be the condition of 245pa, conventional coking 35 hours, cool off through routine, obtaining cold strength M40 is: 84%, M10 is: 5%, hot strength CRI is: 30%, and CSR is: 60% qualified coke.
Claims (4)
1. the tamping coking method of proportioning Australia weakly caking coal is characterized in that through the following step:
A, get the raw materials ready by following proportioning:
Rmax is Australia weakly caking coal 5～15 wt% of 0.5～0.7%
Rmax is 0.9～1.2% middle degree of coalification coal 10～15 wt%
Rmax is 1.2～1.5% middle degree of coalification coal 55～75 wt%
Rmax is 1.5～1.7% low rank coal 10～15 wt%
Summation is 100%;
B, each feed coal of steps A is mixed: Rmax is 1.20～1.30%, volatilization is divided into 22～25 wt%, ash content is that 14.0～15.0wt%, caking index are 65～70, final contraction value is that 35～40mm, gelatinous layer maximum dilatation are the mixed coal of 13.5～14.5mm;
C, make the mixing coal of step B firm by ramming moulding routinely after, send in the conventional tamping coke furnace, in the coke oven machine side temperature is that 1250～1335 ℃, coal side temperature are that 1260～1345 ℃, moulded coal core temperature are that 950～1050 ℃, peephole pressure are that 5～8pa, collecting main pressure are 100～120pa, to divide flue suction force be the condition of 235～265pa, conventional coking 25～35 hours, cool off through routine, obtaining cold strength M40 is: 83～85%, M10 is: 4～6%, hot strength CRI is: 29～31%, and CSR is: 58～62% qualified coke.
2. the tamping coking method of proportioning as claimed in claim 1 Australia weakly caking coal is characterized in that described Rmax(%) be the maximum average reflectance of the vitrinite of coal, % is a peak area ratio.
3. the tamping coking method of proportioning as claimed in claim 1 Australia weakly caking coal, it is characterized in that the mixing coal particle size of described step B is: granularity accounts for more than 80% less than 3mm's.
4. the tamping coking method of proportioning as claimed in claim 1 Australia weakly caking coal is characterized in that described conventional tamping coke furnace is 5.5 meters tamping coke furnaces, and its depth-width ratio is 11:1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194249A (en) * | 2013-04-27 | 2013-07-10 | 武汉钢铁(集团)公司 | Coal blending and coking method capable of reducing coke granularity |
| CN109111938A (en) * | 2017-06-26 | 2019-01-01 | 上海梅山钢铁股份有限公司 | A kind of coke and coking process of the Australian low bonding coking coal of adapted |
| CN113214855A (en) * | 2021-04-27 | 2021-08-06 | 武汉钢铁有限公司 | Blending method of Australia coking coal with G value lower than 75 |
| CN115044386A (en) * | 2022-07-18 | 2022-09-13 | 河北中煤旭阳能源有限公司 | Top-loading coking coal blending coking method for fully blending imported coal, product thereof and blended coal for coking |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194249A (en) * | 2013-04-27 | 2013-07-10 | 武汉钢铁(集团)公司 | Coal blending and coking method capable of reducing coke granularity |
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| CN109111938A (en) * | 2017-06-26 | 2019-01-01 | 上海梅山钢铁股份有限公司 | A kind of coke and coking process of the Australian low bonding coking coal of adapted |
| CN113214855A (en) * | 2021-04-27 | 2021-08-06 | 武汉钢铁有限公司 | Blending method of Australia coking coal with G value lower than 75 |
| CN115044386A (en) * | 2022-07-18 | 2022-09-13 | 河北中煤旭阳能源有限公司 | Top-loading coking coal blending coking method for fully blending imported coal, product thereof and blended coal for coking |
| CN115044386B (en) * | 2022-07-18 | 2023-05-12 | 河北中煤旭阳能源有限公司 | Top-loading coal blending coking method for fully blending imported coal, product thereof and blended coal for coking |
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Application publication date: 20130731 |