CN109111938A - A kind of coke and coking process of the Australian low bonding coking coal of adapted - Google Patents
A kind of coke and coking process of the Australian low bonding coking coal of adapted Download PDFInfo
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- CN109111938A CN109111938A CN201710491089.XA CN201710491089A CN109111938A CN 109111938 A CN109111938 A CN 109111938A CN 201710491089 A CN201710491089 A CN 201710491089A CN 109111938 A CN109111938 A CN 109111938A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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Abstract
The invention discloses the coke and coking process of a kind of low bonding coking coal of adapted Australia, the technical issues of mainly solving that the drum strength DI of coke being smelt in the prior art with the low bonding coking coal of Australia is low, post reaction strength of coke (CSR) is low, high-quality smelter coke quality requirement be not achieved.The technical solution of the present invention is as follows: a kind of coke of the Australian low bonding coking coal of adapted, it is formed by following mass percent coal blending mixed coking: 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~27%, coking coal 25%~35%, lean coal 4%~8%, the low bonding coking coal 4%~10% of Australia.Drum strength DI >=87% of coke of the present invention, post reaction strength of coke (CSR) >=66%, meets 4000m3And the needs of the above blast furnace process.
Description
Technical field
The present invention relates to a kind of coke and coking process, in particular to the coke of a kind of Australian low bonding coking coal of adapted
And coking process, belong to technical field of coal chemical industry.
Background technique
In recent years, due to the expansion of coking production capacity, the contradiction of high-quality caking coal shortage of resources is also outstanding day by day, especially low
Ash content coking coal becomes one of the focus of each coal chemical enterprise contention.Each coal chemical enterprise has to seek new resource in overseas, but
Since the coking coal condition of coal formation of various regions is different, although volatile matter and adhesive property index meet the classification standard of domestic coking coal,
The characteristics of its coking characteristic and geological characteristics etc. have itself, this brings difficulty to the application of these import coals.
The Chinese patent application of application publication number CN105219412A discloses a kind of coke of adapted Australian coking coal
And coking process, the coking behavior for mainly solving Australian coking coal in the prior art are lower than high-quality coking coal, the coke being smelt with it
The technical issues of reactivity (CRI) of charcoal is high, post reaction strength of coke (CSR) is low, and high-quality smelter coke quality requirement is not achieved；
Wherein the quality of Australian coking coal is that volatilization is divided into 19%~25%, maximum vitrinite reflectance 1.15%~1.25%；It is viscous
Tying index G is 83~89, and maximum thick ness of plastic layer Y is 12~22mm.
Document " Import Coal for Angang experimental study " (Long Xiaoyang, Liang Lei, Wang Ganlin, Weng Xiaogang, Anshan iron and steel plant technology, 2005
(4)) 8 kinds of Australian coals are analyzed in a text, Australian 1# and 2# has been used to be produced, index is to wave
Hair divides VdafIt is 27.28%, maximum vitrinite reflectance is 1.217%, and adhesive index 85, production practices show to be added this
After Australian coking coal 15%, coke cold strength M40 reaches 82.5%, and hot strength of coke CSR reaches 62.3%.
Document " coal quality research of Australian coking coal and optimization application " (Xiang Ru, Chen Peng, Xue Gaifeng, coal conversion,
2011,34 (4)) list the several mine point coking coal of Australia of certain steel mill introduction, 3 Australian coking coals enumerated,
Volatilization is divided into 20-24%, adhesive index 85-88, should divide by the common commercial factor for coal in the country and coal petrography index high-quality
It is simply pressed high-quality coking coal adapted by coking coal, and the effect is unsatisfactory for adapted.Pass through dilation, fluidity and antimonate precipitation
Analysis, finding it, there are larger differences with domestic high-quality coking coal, are optimized adapted, coke quality is stabilized.
Document " Australian coal replaces the bent coking coal research in west " (Zhang Jianfeng, Shen Yulin fuel chemical industry, 2014
(1)) a kind of Australian coal (volatile matter V is described in a textdafBe 26.22%, caking index 92.6) experimental study,
Australian coal has reached high-quality coking coal index according to complete analysis index, but in terms of coking test, and coke quality is more western bent burnt
The intensity of coal is low, and alkali resistance is poor.
Experimental study and production application have been carried out to Australian coking coal in above-mentioned document, has tested and applies equal in document
It is the high-quality coking coal of Australia, caking property is preferable, and adhesive index is greater than 85, " Import Coal for Angang experimental study " (dragon dawn
Sun, Liang Lei, Wang Ganlin, Weng Xiaogang, Anshan iron and steel plant technology, 2005 (4)) in the low bonding coking coal of Australia of low caking property is carried out
Single coal analysis, but there is no apply in test and production.
The burnt pit ash 7.5-8.5%, volatile matter 20-22%, maximum vitrinite reflectance 1.15- of the low bonding of Australia
1.25%；Adhesive index is 72-75, and maximum thick ness of plastic layer Y is 8-10mm, and fluidity MF is 60-80ddpm；The coal is pressed
CHINESE COAL classification belongs to coking coal JM25, but its bad adhesion, different from Australian coking coal described in document, hereon referred to as Australia is big
The low bonding coking coal of Leah.
In addition, low this single of the bonding coking coal coal coking DI drum strength 71-73% of 70kg small coke oven test Australia, single
Intensity 54-56% after the burnt coke of kind.Compared with general domestic coking coal, the drum strength DI of coke is low, post reaction strength of coke
(CSR) low, this brings difficulty to the production application of the low bonding coking coal of the Australia.
Summary of the invention
The object of the present invention is to provide the coke and coking process of a kind of low bonding coking coal of adapted Australia, mainly solve
The drum strength DI for the coke being smelt in the prior art with the low bonding coking coal of Australia is low, post reaction strength of coke (CSR) is low,
The technical issues of high-quality smelter coke quality requirement is not achieved.
The present invention is lower than high-quality coking coal for the particularity of the low bonding coking coal of this Australia, especially its adhesive property
The characteristics of, the low bonding coking coal of Australia is optimized into adapted, coking coal resource is utilized rationally, stablizes coke quality.
The technical solution adopted by the present invention is that a kind of coke of the Australian low bonding coking coal of adapted, by following quality hundred
Divide and formed than coal blending mixed coking: 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~27%, coking coal 25%
~35%, lean coal 4%~8%, the low bonding coking coal 4%~10% of Australia.
Drum strength DI >=87% of coke of the present invention, post reaction strength of coke (CSR) >=66%；
The adhesive index of coking mixed coal is 78-82, and maximum thickness of colloidal matter layer Y is 13-16mm, and mobility MF is
200-800ddpm, mass percentage≤1.5% with alkali metal in components of coal ash.
A kind of coking process of the Australian low bonding coking coal of adapted, comprising the following steps:
A, the low bonding coking coal of Australia is crushed in advance, keeps partial size small by the low bonding coking coal precrushing of Australia
The 60%-65% of its gross mass is accounted in the coal of 3mm；
B, press following mass percent coal blending, 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~
27%, coking coal 25%~35%, lean coal 4%~8%, the low bonding coking coal 4%~10% of Australia；
C, Mixture Density Networks are broken, and the Mixture Density Networks after coal blending in step b, which are crushed, (preferably makes Mixture Density Networks of the partial size less than 3mm account for it
The 75%~78% of gross mass)；
D, broken Mixture Density Networks are sent into top dress coking by coke oven by coal-blending coking, and coking temperature is 1000 ± 50 DEG C, coking
Time is 20 ± 2 hours；
E, cooling after the discharging of the coke.
Coke quality detection is carried out later, and measurement coke ash, sulfur content in coke, coke reactivity and post reaction strength etc. refer to
Mark.
The Coal Characteristics of the low bonding coking coal of the Australia of institute's adapted are ash content 7.5-8.5% in the present invention, volatile matter
20-22%, maximum vitrinite reflectance 1.15-1.25%；Adhesive index is 72-75, and maximum thick ness of plastic layer Y is 8-10mm,
Fluidity MF is 60-80ddpm.
The coal quality of above-mentioned various other single coking coals used meets the classification indicators in corresponding national standard.
The adhesive index of the mixed coal of method of the invention reaches 78-82, and maximum thickness of colloidal matter layer Y is 13-16mm, stream
Dynamic property MF is 200-800ddpm；Mass percentage≤1.5% with alkali metal in components of coal ash.
The requirement of above-mentioned coal blending quality is derived from the mass property research to the low viscous coking coal of Australia.By studying single
The mobility of coal, the poor fluidity of the low viscous coking coal of discovery Australia, fluidity MF is only 60-80ddpm, is lower than common coking coal
200~1000ddpm, while its alkali metal content is high, is that the rotary drum for the coke being smelt using the low bonding coking coal of Australia is strong
The degree key reason that DI is low, post reaction strength of coke (CSR) is low；Therefore, quality percentage of the control with alkali metal in components of coal ash
Content is less than 1.5%.
Research is it has also been found that the low bonding coking coal of Australia is across coking coal, rich coal and 1/3 coking coal from distribution graph of reflectivity
Regional scope, and its caking property is poor, is unable to substituting fat part, therefore proposes that the coal replaces part coking coal and 1/3
Coking coal, to reduce the influence to coal blending quality.
Drum strength DI >=87% of the coke of the method for the present invention production, post reaction strength of coke (CSR) >=66%, therefore
It can satisfy 4000m3And the needs of the above blast furnace process.
The present invention has following good effect compared with prior art: 1, coking coal resource is expanded, it is low for Australia
The characteristics of caking property coking coal, proposes precrushing control fineness and the low bonding coking coal of Australia is replaced part coking coal and 1/3
Coking coal is applied to coal-blending coking, expands the range of coking coal, resource is made to obtain Optimum utilization.2, coke quality, Australia are maintained
The low Coal Blending Technology for bonding coking coal participation of big Leah is by maintaining coke to the control with components of coal ash and coal blending mobility
Quality ensure that coke meets the needs of blast furnace ironmaking.3, coke ash is reduced, due to the ash of the low bonding coking coal of Australia
Divide and be lower than common coking coal, adapted reduces coke ash, improves coke quality.4, Australia provided by the invention is low viscous
The coke making and coal blending method of baking coal can reach high-quality smelter coke quality requirement in the coke of common top dress coke oven production.
Specific embodiment
The coke of the low bonding coking coal of a kind of adapted Australia of the present invention, by following mass percent coal blending mixed coking
At: 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~27%, coking coal 25%~35%, lean coal 4%~
8%, the low bonding coking coal 4%~10% of Australia.
The specific proportion of the embodiment of the present invention is shown in Table 1, the low bonding coking coal of the non-adapted of scheme 1 Australia, the big benefit of 2 Australia of scheme
Sub- low bonding Blending of Coking Coals 4%, the low bonding Blending of Coking Coals 8% of 3 Australia of scheme, the low bonding coking coal of 4 Australia of scheme are matched
Than 10%, pushing up charging coke coking to obtain the post reaction strength of coke (CSR) of coke by 6m is 66%~69%；Coke turns
Drum intensity DI is 87-89%.
A kind of coking process of the Australian low bonding coking coal of adapted, comprising the following steps:
A, the low bonding coking coal of Australia is crushed in advance, keeps partial size small by the low bonding coking coal precrushing of Australia
The 63% of its gross mass is accounted in the coal of 3mm；
B, press following mass percent coal blending, 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~
27%, coking coal 25%~35%, lean coal 4%~8%, the low bonding coking coal 4%~10% of Australia；
C, Mixture Density Networks are broken, and the Mixture Density Networks after coal blending in step b are crushed, and so that Mixture Density Networks of the partial size less than 3mm is accounted for it total
The 77% of quality；
D, broken Mixture Density Networks are sent into top dress coking by coke oven by coal-blending coking, and coking temperature is 1000 DEG C, coking time
For 22h；
E, with cooling (also known as dry coke quenching the is cooling) coke of nitrogen after the discharging of the coke.
Coke quality detection is carried out later, and measurement coke ash, sulfur content in coke, coke reactivity and post reaction strength etc. refer to
Mark, measurement result are shown in Table 1.
The embodiment of the present invention pushes up charging coke coking using 7m, carries out coal blending with the low bonding coking coal of Australia, coal blending is waved
Hair point (Vd) is 25~26%, and for caking index 80~85, fluidity MF is 230-330ddpm, and ash component alkali metal content is
1.2%~1.5%, and with five class coal cokings of 1/3 coking coal, bottle coal, rich coal, coking coal and lean coal, obtain quality in the prior art
Essentially identical coke, post reaction strength of coke (CSR) are 66%~67%, coke ash < 12.0%, coke drum strength DI
For 87-89%.
1 coke making and coal blending of the embodiment of the present invention (mass percent) of table and coke quality tables of data
Scheme 2 to 4 measurement result of scheme can be seen that the low bonding coking coal substitution coking coal of adapted Australia from upper table 1
After 1/3 coking coal, the number of each qualitative data of obtained coke and the measurement of scheme 1 without the low bonding coking coal of adapted Australia
According to essentially identical, 4000m can satisfy completely3And the needs of the above blast furnace process.
It is summed up, the present embodiment has the advantages that 1, expands coking coal resource.It is low viscous for Australia
The characteristics of knot property coking coal, proposes precrushing control fineness and the low bonding coking coal of Australia is replaced part coking coal and 1/3 coke
Coal is applied to coal-blending coking, expands the range of coking coal, resource is made to obtain Optimum utilization.2, coke quality is maintained.Australia is big
The Coal Blending Technology that the low bonding coking coal of Leah participates in is by maintaining the matter of coke to the control with components of coal ash and coal blending mobility
Amount, ensure that coke meets the needs of blast furnace ironmaking.3, coke ash is reduced.Due to the burnt pit ash of the low bonding of Australia
Lower than common coking coal, adapted reduces coke ash, improves coke quality.4, the low bonding of Australia provided by the invention
The coke making and coal blending method of coking coal pushes up the coke drum strength DI for filling coke oven production in 7m or more greater than 87%, after coke gasification reaction by force
It spends (CSR) and is greater than 66%, coke quality is effectively guaranteed less than 12.0% in coke ash, meets 4000m3The above big blast furnace
The needs of production.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (5)
1. a kind of coke of the Australian low bonding coking coal of adapted, formed by following mass percent coal blending mixed coking: 1/3 is burnt
Coal 15%~20%, bottle coal 15%~20%, rich coal 22%~27%, coking coal 25%~35%, lean coal 4%~8%, the big benefit of Australia
Sub- low bonding coking coal 4%~10%；The burnt pit ash of the low bonding of Australia is 7.5-8.5%, volatile matter 20-22%,
Maximum vitrinite reflectance 1.15-1.25%, adhesive index 72-75, maximum thick ness of plastic layer Y are 8-10mm；Partial size is less than
The low bonding coking coal of the Australia of 3mm accounts for the 60%-65% of the low bonding coking coal gross mass of Australia；The caking index of mixed coal
G is 78-82, and maximum thickness of colloidal matter layer Y is 13-16mm；Mobility MF is 200-800ddpm；Cooperate alkali metal in components of coal ash
Mass percentage≤1.5%；Drum strength DI >=87% of the coke, post reaction strength of coke (CSR) >=66%.
2. the coke of the low bonding coking coal of adapted as described in claim 1 Australia, characterized in that after coal blending Mixture Density Networks need through
Broken, partial size 3mm Mixture Density Networks below account for the 75%~78% of its gross mass.
3. a kind of coking process of the Australian low bonding coking coal of adapted, characterized in that the following steps are included:
A, the low bonding coking coal of Australia is crushed by the low bonding coking coal precrushing of Australia in advance, and partial size is less than 3mm's
Coal accounts for the 60%-65% of its gross mass, and the low burnt pit ash of bonding of Australia is 7.5-8.5%, volatile matter 20-
22%, maximum vitrinite reflectance 1.15-1.25%, adhesive index 72-75, maximum thick ness of plastic layer Y are 8-10mm；
B, following mass percent coal blending, 1/3 coking coal 15%~20%, bottle coal 15%~20%, rich coal 22%~27%, coke are pressed
Coal 25%~35%, lean coal 4%~8%, the low bonding coking coal 4%~10% of Australia；
C, Mixture Density Networks are broken, and the Mixture Density Networks after coal blending in step b are crushed；
D, broken Mixture Density Networks are sent into top dress coking by coke oven by coal-blending coking, and coking temperature is 1000 ± 50 DEG C, coking time
It is 22 ± 1 hours；
E, dry coke quenching is cooling after the discharging of the coke.
4. the coking process of the Australian low bonding coking coal of adapted as claimed in claim 3, characterized in that in the step b,
The adhesive index value of Mixture Density Networks is 78~82 after coal blending, and maximum thick ness of plastic layer Y is 13~16mm, the ash of Mixture Density Networks after coal blending
The mass percentage of alkali metal is 1.2%~1.5% in ingredient, and the fluidity MF of Mixture Density Networks is 200-800ddmp after coal blending.
5. the coking process of the Australian low bonding coking coal of adapted as claimed in claim 3, characterized in that in the step c,
After Mixture Density Networks are broken, partial size 3mm Mixture Density Networks below account for the 75%~78% of its gross mass.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484287A (en) * | 2019-08-23 | 2019-11-22 | 山西沁新能源集团股份有限公司 | A kind of method of coke making and coal blending |
| CN112111292A (en) * | 2019-06-20 | 2020-12-22 | 上海梅山钢铁股份有限公司 | Coke matched with waste activated carbon and coking method |
| CN112521964A (en) * | 2020-11-23 | 2021-03-19 | 武汉钢铁有限公司 | Method for adjusting coke oven heating system after increasing gas coal and/or lean coal dosage |
| 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 |
| CN113817489A (en) * | 2020-06-17 | 2021-12-21 | 宝山钢铁股份有限公司 | Coal blending method based on coke optical characteristic index |
| CN113969177A (en) * | 2020-07-23 | 2022-01-25 | 上海梅山钢铁股份有限公司 | Coke matched with oxidized and deteriorated coking coal and coking method |
| CN115141665A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Coke for matching Australian gas coal and coking method |
| WO2024017249A1 (en) * | 2022-07-18 | 2024-01-25 | 河北中煤旭阳能源有限公司 | Top-charging coal blending and coking method and product thereof, and blended coal for coking |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112111292A (en) * | 2019-06-20 | 2020-12-22 | 上海梅山钢铁股份有限公司 | Coke matched with waste activated carbon and coking method |
| CN110484287A (en) * | 2019-08-23 | 2019-11-22 | 山西沁新能源集团股份有限公司 | A kind of method of coke making and coal blending |
| CN110484287B (en) * | 2019-08-23 | 2020-07-03 | 山西沁新能源集团股份有限公司 | Coking and coal blending method |
| CN113817489A (en) * | 2020-06-17 | 2021-12-21 | 宝山钢铁股份有限公司 | Coal blending method based on coke optical characteristic index |
| CN113969177A (en) * | 2020-07-23 | 2022-01-25 | 上海梅山钢铁股份有限公司 | Coke matched with oxidized and deteriorated coking coal and coking method |
| CN112521964A (en) * | 2020-11-23 | 2021-03-19 | 武汉钢铁有限公司 | Method for adjusting coke oven heating system after increasing gas coal and/or lean coal dosage |
| CN112521964B (en) * | 2020-11-23 | 2021-06-01 | 武汉钢铁有限公司 | Method for adjusting coke oven heating system after increasing gas coal and/or lean coal dosage |
| CN115141665A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Coke for matching Australian gas coal and coking method |
| 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 |
| WO2024017249A1 (en) * | 2022-07-18 | 2024-01-25 | 河北中煤旭阳能源有限公司 | Top-charging coal blending and coking method and product thereof, and blended coal for coking |
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