CN103468291A - Coking blending method for controlling volatile compound content of blended coal at 28-29% - Google Patents
Coking blending method for controlling volatile compound content of blended coal at 28-29% Download PDFInfo
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- CN103468291A CN103468291A CN2013104762391A CN201310476239A CN103468291A CN 103468291 A CN103468291 A CN 103468291A CN 2013104762391 A CN2013104762391 A CN 2013104762391A CN 201310476239 A CN201310476239 A CN 201310476239A CN 103468291 A CN103468291 A CN 103468291A
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Abstract
The invention discloses a coking blending method for controlling volatile compound content of blended coal at 28-29%. The coal blending method comprises gas fat coal, fat coal, 1/3 coke, coke, lean coal and gas coal in different weight percents; the volatile compound content of the gas fat coal is 39-41%, the maximum fluidity is greater than or equal to 80000ddpm, and the solid-softening temperature interval is greater than or equal to 100 DEG C; the volatile compound content of the fat coal is 29-32%, the maximum fluidity is greater than or equal to 60000ddpm, and the solid-softening temperature interval is greater than or equal to 100 DEG C; the 1/3 coke is divided into 1/3 coke 1#, 1/3 coke 2# and 1/3 coke 3# according to different volatile compound contents and Y values; the coke is divided into coke 1#, coke 2# and coke3# according to different G values; the volatile compound content of the lean coal is 15-18%, and the G value is greater than or equal to 30, and smaller than or equal to 60; and the volatile compound content of the gas coal is greater than or equal to 37%, and the Y value is smaller than or equal to 13. The total proportion of the gas coal and lean coal is controlled to regulate the cohesiveness of the blended coal and effectively control the volatile compound content of the blended coal at 28-29%, thereby lowering the coal blending cost and ensuring the coke quality on the premise of ensuring the lower demand for coke yield.
Description
Technical field
The invention belongs to the Coking Coal Blending Technology field, be specifically related to a kind ofly control mixed coal volatilization and be divided into 28～29% coke making and coal blending method.
Background technology
China is Iron and Steel Production big country, and iron and steel enterprise all is equipped with coke-oven plant.Along with the continuous fluctuation of iron and steel market, most enterprises all can control effectively to pig iron output, and for cost-saving, coke output must keep balance with pig iron output.The method of controlling coke output is that the volatilization by controlling mixed coal has been assigned to.Improve coke output if need, reduce the volatile matter of mixed coal, otherwise, reduce coke output if need, improve the volatile matter of mixed coal.
The raw material of producing coke is that mixed coal is that single coking coal of planting of multiple different in kind coordinates and forms according to a certain percentage, these single volatile matters of planting coking coal differ larger, for example the volatile matter of lean coal, coking coal can be low to moderate>10～20%, the volatile matter of bottle coal, gas-fat coal is high to>37%.At present, the main method that improves the mixed coal volatile matter is to reduce the ratio of low volatile coking coal, improves the ratio of high volatile coking coal.
Although it is fairly simple directly to control the method for mixed coal volatile matter, but because the coking coal ature of coal is very complicated, other technological property otherness of the coking coal of identical volatile matter may be larger, if be that the simple ratio to high and low volatile matter coking coal regulates to reach the purpose of regulating the mixed coal volatile matter, ignore other technological property of coking coal, although coke output can be controlled, coke quality there will be fluctuation by a relatively large margin, smooth operation of furnace is affected greatly, lose more than gain.
Summary of the invention:
The object of the present invention is to provide and a kind ofly control mixed coal volatilization and be divided into 28～29% coke making and coal blending method, to guarantee, in the situation that coke output needs lowlyer, can reduce coal blending cost and ensure coke quality.
For achieving the above object, the technical solution used in the present invention comprises gas-fat coal, rich coal, 1/3 coking coal, coking coal, lean coal and bottle coal;
The volatilization of described gas-fat coal is divided into 39～41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100; The volatilization of ℃ described rich coal is divided into 29～32%, maximum fluidity >=60000ddpm, Gu-softening temperature is interval >=and 100; ℃ described 1/3 coking coal comprises 1/3 coking coal 1#, 1/3 coking coal 2#, 1/3 coking coal 3#, and the volatilization of described 1/3 coking coal 1# is divided into 30～32%, Y value >=18, the volatile matter of described 1/3 coking coal 2# >=34%, Y value >=14, the volatilization of described 1/3 coking coal 3# is divided into 30～32%, 11≤Y value≤16; Described coking coal comprises coking coal 1#, coking coal 2#, coking coal 3#, and the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22～26%, and the G value of coking coal 1# >=85, and the G value of coking coal 2# is: between 80≤G value<85, the G value of coking coal 3# is: 78≤G value<80; The volatilization of described lean coal is divided into 15～18%, G value: 30≤G≤60; The volatile matter of described bottle coal >=37%, Y value≤13;
The proportioning of described each coal is by weight percentage: gas-fat coal: 5～10%; Rich coal: 10～25%; 1/3 coking coal 1#:10～15%, 1/3 coking coal 2#:5～10%, 1/3 coking coal 3#:0～5%, and the summation of three kind of 1/3 coking coal: 10～20%; Coking coal 1#:20～25%, coking coal 2#:15～20%, coking coal 3#:0～5%, and the summation of three kinds of coking coal: 45～50%; Lean coal: 5～10%, and the summation of three kinds of coking coal: 40～45%; Lean coal: 5～10%, bottle coal: 5～10%, and bottle coal and lean coal sum≤15%.
The present invention has following beneficial effect:
1, the present invention is by controlling the overall proportion of bottle coal and lean coal, to regulate the cohesiveness of mixed coal, again by controlling the performance of 1/3 coking coal, coking coal, rich coal and gas-fat coal, make mixed coal there is coking behavior preferably, avoided blindly increasing the bottle coal ratio and reduced the coke quality degradation that refines that the lean coal ratio causes.
2, the present invention can effectively be controlled at 28～29% by the mixed coal volatile matter, and do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, can obtain high grade coke on top dress coke oven more than 4.3 meters, Indexes on Coke Strength can reach: shatter strength M40 is greater than 87%, abrasive wear resistance M10 is less than 7.0%, reactive (CRI) is less than 24%, and post-reaction strength (CSR) is greater than 67%.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
The technical solution used in the present invention comprises gas-fat coal, rich coal, 1/3 coking coal, coking coal, lean coal and bottle coal;
The volatilization of described gas-fat coal is divided into 39～41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100; The volatilization of ℃ described rich coal is divided into 29～32%, maximum fluidity >=60000ddpm, Gu-softening temperature is interval >=and 100; ℃ described 1/3 coking coal comprises 1/3 coking coal 1#, 1/3 coking coal 2#, 1/3 coking coal 3#, and the volatilization of described 1/3 coking coal 1# is divided into 30～32%, Y value >=18, the volatile matter of described 1/3 coking coal 2# >=34%, Y value >=14, the volatilization of described 1/3 coking coal 3# is divided into 30～32%, 11≤Y value≤16; Described coking coal comprises coking coal 1#, coking coal 2#, coking coal 3#, and the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22～26%, and the G value of coking coal 1# >=85, and the G value of coking coal 2# is: between 80≤G value<85, the G value of coking coal 3# is: 78≤G value<80; The volatilization of described lean coal is divided into 15～18%, G value: 30≤G value≤60; The volatile matter of described bottle coal >=37%, Y value≤13;
The proportioning of described each coal is by weight percentage: gas-fat coal: 5～10%; Rich coal: 10～25%; 1/3 coking coal 1#:10～15%, 1/3 coking coal 2#:5～10%, 1/3 coking coal 3#:0～5%, and the summation of three kind of 1/3 coking coal: 10～20%; Coking coal 1#:20～25%, coking coal 2#:15～20%, coking coal 3#:0～5%, and the summation of three kinds of coking coal: 45～50%; Lean coal: 5～10%, and the summation of three kinds of coking coal: 40～45%; Lean coal: 5～10%, bottle coal: 5～10%, and bottle coal and lean coal sum≤15%.
In the present invention, the contriver is through studying discovery for a long period of time, and the G value of the Y value of 1/3 coking coal, coking coal is larger on the impact of mixed coal, and the coking coal of 1/3 coking coal of the different Y values of identical volatile matter, the different G values of identical volatile matter is larger on the impact of mixed coal coking gained coke quality.
Embodiment 1
Gas-fat coal: volatilization is divided into 40%, and maximum fluidity is 83680ddpm, Gu-the softening temperature interval is 105 ℃;
Rich coal: volatilization is divided into 30%, and maximum fluidity is 62743ddpm, Gu-the softening temperature interval is 103 ℃;
1/3 coking coal 1#: volatilization is divided into 31%%, and Y value is 20,
1/3 coking coal 2#: volatilization is divided into 34%, and Y value is 15,
1/3 coking coal 3#: volatilization is divided into 31%%, and Y value is 15,
Coking coal 1#: it is 86 that volatilization is divided into 24%, G value,
Coking coal 2#: it is 83 that volatilization is divided into 24%, G value,
Coking coal 3#: it is 79 that volatilization is divided into 24%, G value,
Lean coal: it is 45 that volatilization is divided into 15%, G value,
Bottle coal: volatilization is divided into 40%, and Y value is 9.
Above coal is carried out to coal blending according to following ratio:
Gas-fat coal: 8%; Rich coal: 10%; 1/3 coking coal 1#:12%, 1/3 coking coal 2#:15%, 1/3 coking coal 3#:3%; Coking coal 1#:20%, coking coal 2#:16%, coking coal 3#:3%; Lean coal: 8%, bottle coal: 5%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 28.19%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, can obtain high grade coke on the dress coke oven of 4.3 meters and above top, Indexes on Coke Strength can reach: shatter strength M40 is greater than 87%, abrasive wear resistance M10 is less than 7.0%, reactive (CRI) is less than 24%, and post-reaction strength (CSR) is greater than 67%.
Comparative Examples 1
Gas-fat coal: 8%; Rich coal: 10%; 1/3 coking coal 2#:15%, 1/3 coking coal 3#:15%; Coking coal 1#:20%, coking coal 2#:16%, coking coal 3#:3%; Lean coal: 8%, bottle coal: 5%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 28.19%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, on 4.3 meters top dress coke ovens, the gained Indexes on Coke Strength is: shatter strength M40 is less than 83%, abrasive wear resistance M10 is less than 9%, and reactive (CRI) is less than 26%, and post-reaction strength (CSR) is less than 63%.
Comparative Examples 2
Gas-fat coal: 8%; Rich coal: 10%; 1/3 coking coal 1#:12%, 1/3 coking coal 2#:15%, 1/3 coking coal 3#:3%; Coking coal 2#:16%, coking coal 3#:23%; Lean coal: 8%, bottle coal: 5%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 28.19%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, on 4.3 meters top dress coke ovens, the gained Indexes on Coke Strength is: shatter strength M40 is less than 83%, abrasive wear resistance M10 is less than 9%, and reactive (CRI) is less than 26%, and post-reaction strength (CSR) is less than 61%.
Claims (1)
1. control mixed coal volatilization and be divided into 28～29% coke making and coal blending method for one kind, it is characterized in that: this blending method comprises gas-fat coal, rich coal, 1/3 coking coal, coking coal, lean coal and bottle coal;
The volatilization of described gas-fat coal is divided into 39～41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100; The volatilization of ℃ described rich coal is divided into 29～32%, maximum fluidity >=60000ddpm, Gu-softening temperature is interval >=and 100; ℃ described 1/3 coking coal comprises 1/3 coking coal 1#, 1/3 coking coal 2#, 1/3 coking coal 3#, and the volatilization of described 1/3 coking coal 1# is divided into 30～32%, Y value >=18, the volatile matter of described 1/3 coking coal 2# >=34%, Y value >=14, the volatilization of described 1/3 coking coal 3# is divided into 30～32%, 11≤Y value≤16; Described coking coal comprises coking coal 1#, coking coal 2#, coking coal 3#, and the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22～26%, and the G value of coking coal 1# >=85, and the G value of coking coal 2# is: between 80≤G value<85, the G value of coking coal 3# is: 78≤G value<80; The volatilization of described lean coal is divided into 15～18%, G value: 30≤G≤60; The volatile matter of described bottle coal >=37%, Y value≤13;
The proportioning of described each coal is by weight percentage: gas-fat coal: 5～10%; Rich coal: 10～25%; 1/3 coking coal 1#:10～15%, 1/3 coking coal 2#:5～10%, 1/3 coking coal 3#:0～5%, and the summation of three kind of 1/3 coking coal: 10～20%; Coking coal 1#:20～25%, coking coal 2#:15～20%, coking coal 3#:0～5%, and the summation of three kinds of coking coal: 45～50%; Lean coal: 5～10%, and the summation of three kinds of coking coal: 40～45%; Lean coal: 5～10%, bottle coal: 5～10%, and bottle coal and lean coal sum≤15%.
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| CN104673345A (en) * | 2015-02-13 | 2015-06-03 | 武汉钢铁(集团)公司 | Coal blending method based on coking property of coking coal |
| CN104818039A (en) * | 2015-04-17 | 2015-08-05 | 武汉钢铁(集团)公司 | Blending method of low metamorphic coking coal with Vdaf>=30% |
| CN104845650A (en) * | 2015-05-22 | 2015-08-19 | 武汉钢铁(集团)公司 | Coking coal blending method for controlling M10 index of cokes |
| CN105670669A (en) * | 2016-03-09 | 2016-06-15 | 宁波钢铁有限公司 | Double-line coal blending method for preventing coke strength from deterioration |
| CN105778961A (en) * | 2016-05-16 | 2016-07-20 | 武汉钢铁股份有限公司 | Method for controlling porosity of coke |
| CN106118702A (en) * | 2016-08-16 | 2016-11-16 | 武汉钢铁股份有限公司 | Reduce the blending method of coke initial reaction temperature |
| CN108931549A (en) * | 2017-05-24 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of coking coal coking behavior method of determination and evaluation |
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| CN105670669A (en) * | 2016-03-09 | 2016-06-15 | 宁波钢铁有限公司 | Double-line coal blending method for preventing coke strength from deterioration |
| CN105778961A (en) * | 2016-05-16 | 2016-07-20 | 武汉钢铁股份有限公司 | Method for controlling porosity of coke |
| CN106118702A (en) * | 2016-08-16 | 2016-11-16 | 武汉钢铁股份有限公司 | Reduce the blending method of coke initial reaction temperature |
| CN108931549A (en) * | 2017-05-24 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of coking coal coking behavior method of determination and evaluation |
| CN108931549B (en) * | 2017-05-24 | 2020-07-28 | 宝山钢铁股份有限公司 | Coking coal coking performance detection method |
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