CN103468290B - Coking blending method for controlling volatile compound content of blended coal - Google Patents
Coking blending method for controlling volatile compound content of blended coal Download PDFInfo
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- CN103468290B CN103468290B CN201310472334.4A CN201310472334A CN103468290B CN 103468290 B CN103468290 B CN 103468290B CN 201310472334 A CN201310472334 A CN 201310472334A CN 103468290 B CN103468290 B CN 103468290B
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Abstract
The invention discloses a coking blending method for controlling volatile compound content of blended coal. According to the method, the volatile compound content of the blended coal is controlled at 26-26.5% through gas fat coal, fat coal, 1/3 coke, coke and lean coal; 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; and 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. The method can effectively control the volatile compound content of the blended coal at 26-26.5% under the condition of adding high-volatile-compound-content gas fat coal, and can lower the coal blending cost and ensure the coke quality on the premise of ensuring high demand for coke yield.
Description
Technical field
The invention belongs to Coking Coal Blending Technology field, be specifically related to a kind of coke making and coal blending method of controlling mixed coal volatile matter.
Background technology
China is Iron and Steel Production big country, and iron and steel enterprise is all 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.If desired improve coke output, reduce the volatile matter of mixed coal; Otherwise, if desired reduce coke output, improve the volatile matter of mixed coal.
Single coking coal of planting of producing the raw material of coke and be mixed coal and being 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%, and the volatile matter of bottle coal, gas-fat coal is high to > 37%.At present, the main method that reduces mixed coal volatile matter is to improve the ratio of low volatile coking coal, reduces the ratio of high volatile coking coal.
Although it is fairly simple directly to control the method for mixed coal volatile matter, but because 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 object that regulates 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.The bottle coal that for example simply volatilization is divided into > 28-37% removes to replace the gas-fat coal that volatilization is divided into > 37%, because both other technic index difference are larger, its coal-blending coking gained coke quality also inevitable difference is very large.Or simply lean coal, coking coal are substituted to bottle coal, gas-fat coal or rich coal, not only significantly increase coal blending cost, and gained coke quality can not be guaranteed.
Summary of the invention
The object of this invention is to provide a kind of coke making and coal blending method of controlling mixed coal volatile matter, to ensure in the situation that coke output needs are higher, can reduce coal blending cost and ensure coke quality.
For achieving the above object, the technical solution used in the present invention is 26-26.5% by gas-fat coal, rich coal, 1/3 coking coal, coking coal and lean coal by the control of mixed coal volatile matter;
The volatilization of described gas-fat coal is divided into 39-41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100 DEG C; The volatilization of described rich coal is divided into 29-32%, maximum fluidity >=60000ddpm, Gu-softening temperature interval >=100 DEG C; 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, volatile matter >=34% of described 1/3 coking coal 2#, 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#, the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22-26%, and G value >=85 of coking coal 1#, the G value of coking coal 2# is: 80≤G value < 85, and the G value of coking coal 3# is: 78≤G value < 80; The volatilization of described lean coal is divided into 15-18%, and G value is: 30≤G value≤60;
The proportioning of described each coal is by weight percentage: gas-fat coal: 3-5%; Rich coal: 10-15%; 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: 15-25%; Coking coal 1#:20-25%, coking coal 2#:15-20%, coking coal 3#:0-10%, and the summation of three kinds of coking coal: 45-50%; Lean coal: 10-15%, and summation≤60% of three kinds of coking coal and lean coal; The proportioning sum of described each coal is 100%.
The present invention has following beneficial effect:
1, the present invention is by the analysis of other technic index, suitably adapted the gas-fat coal of the high volatile of relative low price, high fluidity, plastic mass rich content, be conducive to increase the fusion of coal grain in coking process, impel coke coking comparatively even, quality is more excellent, has overcome the defect that mainly causes coke quality to reduce by reducing the dosage of high volatile coking coal to the control of mixed coal volatile matter in prior art.
2, the present invention can effectively be controlled at 26-26.5% by mixed coal volatile matter, and do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, more than 4.3 meters, on top dress coke oven, can obtain high grade coke, 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 and lean coal;
The volatilization of described gas-fat coal is divided into 39-41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100 DEG C; The volatilization of described rich coal is divided into 29-32%, maximum fluidity >=60000ddpm, Gu-softening temperature interval >=100 DEG C; 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, volatile matter >=34% of described 1/3 coking coal 2#, 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#, the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22-26%, and G value >=85 of coking coal 1#, the G value of coking coal 2# is: 80≤G value < 85, and the G value of coking coal 3# is: 78≤G value < 80; The volatilization of described lean coal is divided into 15-18%, and G value is: 30≤G value≤60;
The proportioning of described each coal is by weight percentage: gas-fat coal: 3-5%; Rich coal: 10-15%; 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: 15-25%; Coking coal 1#:20-25%, coking coal 2#:15-20%, coking coal 3#:0-10%, and the summation of three kinds of coking coal: 45-50%; Lean coal: 10-15%, and summation≤60% of three kinds of coking coal and lean coal; The proportioning sum of described each coal is 100%.
In the present invention, contriver is through discoverys that study for a long period of time, and the Y value of 1/3 coking coal, the G value of coking coal are 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, identical volatile matter difference G values affects larger on mixed coal coking gained coke quality.
Embodiment 1
Gas-fat coal: volatilization is divided into 40%, and maximum fluidity is 83680ddpm, Gu-softening temperature interval is 105 DEG C;
Rich coal: volatilization is divided into 30%, and maximum fluidity is 62743ddpm, Gu-softening temperature interval is 103 DEG C;
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
Above coal is carried out to coal blending according to following ratio:
Gas-fat coal: 5%; Rich coal: 11%; 1/3 coking coal 1#:15%, 1/3 coking coal 2#:9%, 1/3 coking coal 3#:3%; Coking coal 1#:25%, coking coal 2#:17%, coking coal 3#:5%; Lean coal: 10%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 26.35%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, on 4.3 meters of top dress coke ovens, can obtain high grade coke, 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 example 1
Gas-fat coal: 5%; Rich coal: 11%; 1/3 coking coal 2#:9%, 1/3 coking coal 3#:18%; Coking coal 1#:25%, coking coal 2#:17%, coking coal 3#:5%; Lean coal: 10%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 26.35%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, on the dress coke oven of 4.3 meters and above top, gained Indexes on Coke Strength is: shatter strength M40 is less than 83%, abrasive wear resistance M10 is less than 9, reactive (CRI) is less than 26%, and post-reaction strength (CSR) is less than 62%.
Comparative example 2
Gas-fat coal: 5%; Rich coal: 11%; 1/3 coking coal 2#:9%, 1/3 coking coal 3#:18%; Coking coal 2#:17%, coking coal 3#:30%; Lean coal: 10%.
The volatile matter that carries out coal blending gained mixed coal according to above ratio is after measured: 26.35%.
Do not having under moulded coal, selectivity pulverizing, dry coke quenching and coal damping condition, on the dress coke oven of 4.3 meters and above top, gained Indexes on Coke Strength is: shatter strength M40 is less than 83%, abrasive wear resistance M10 is less than 9, reactive (CRI) is less than 26%, and post-reaction strength (CSR) is less than 62%.
Claims (1)
1. a coke making and coal blending method of controlling mixed coal volatile matter, is characterized in that: this blending method is 26-26.5% by gas-fat coal, rich coal, 1/3 coking coal, coking coal and lean coal by the control of mixed coal volatile matter;
The volatilization of described gas-fat coal is divided into 39-41%, maximum fluidity >=80000ddpm, Gu-softening temperature interval >=100 DEG C; The volatilization of described rich coal is divided into 29-32%, maximum fluidity >=60000ddpm, Gu-softening temperature interval >=100 DEG C; 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, volatile matter >=34% of described 1/3 coking coal 2#, 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#, the volatile matter of described coking coal 1#, coking coal 2#, coking coal 3# is all 22-26%, and G value >=85 of coking coal 1#, the G value of coking coal 2# is: 80≤G value < 85, and the G value of coking coal 3# is: 78≤G value < 80; The volatilization of described lean coal is divided into 15-18%, and G value is: 30≤G value≤60;
The proportioning of described each coal is by weight percentage: gas-fat coal: 3-5%; Rich coal: 10-15%; 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: 15-25%; Coking coal 1#:20-25%, coking coal 2#:15-20%, coking coal 3#:0-10%, and the summation of three kinds of coking coal: 45-50%; Lean coal: 10-15%, and summation≤60% of three kinds of coking coal and lean coal; The proportioning sum of described each coal is 100%.
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Effective date of registration: 20170717 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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