CN105925294A - Control method for coke particle size uniformity - Google Patents
Control method for coke particle size uniformity Download PDFInfo
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- CN105925294A CN105925294A CN201610320854.7A CN201610320854A CN105925294A CN 105925294 A CN105925294 A CN 105925294A CN 201610320854 A CN201610320854 A CN 201610320854A CN 105925294 A CN105925294 A CN 105925294A
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- coal
- coke
- weight percentage
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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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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a control method for the coke particle size uniformity. The method comprises the following steps that 1, a coal mixing scheme is determined, wherein 5%-30% of gas coal, 15%-30% of 1/3 coking coal, 5%-20% of fat coal, 20%-50% of coking coal and 3%-15% of lean coal are mixed; 2, the gradation of mixed coal is controlled to enable all the particle sizes of the mixed coal to meet the requirements that the weight percentage of the part with the particle size larger than or equal to 3 mm is smaller than or equal to 25%, the weight percentage of the part with the particle size larger than or equal to 0.5 mm and smaller than 3 mm is 40%-50%, and the weight percentage of the part with the particle size smaller than 0.5 mm is larger than or equal to 35%, wherein the weight percentage of the part with the particle size larger than or equal to 5 mm is smaller than or equal to 5%, the weight percentage of the part with the particle size larger than or equal to 3 mm and smaller than 5 mm is 5% to 25%, the weight percentage of the part with the particle size larger than or equal to 1 mm and smaller than 3 mm is 10% to 25%, and the weight percentage of the part with the particle size larger than or equal to 0.5 mm and smaller than 1 mm is 20%-35%; 3, the mixed coal is put into a furnace to be coked. According to the method, by reasonably mixing the coal and reasonably controlling the gradation of the mixed coal, close stacking can be formed during coking, the porosity of the coke is decreased, normal growth and extension of coke fractures are promoted, and therefore the coke with the uniform particle size is obtained.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to the control method of a kind of coke size uniformity.
Background technology
The uniformity of coke size composition affects the breathability of blast furnace, and coke size is uniform, then between coke, porosity is high,
Blast furnace permeability is good.Coke layer good permeability, correspondingly, the breathability of blast furnace soft melt zone is also good, grain when coke arrives cupola well
Spending the most unlikely too small, too small meeting causes hearth accumulation.Visible, coking production process blending ratio and mixed coal granularmetric composition are really
Fixed, obtain certain coke strenth except being necessary to ensure that, in addition it is also necessary to obtain the uniform coke of certain particle size.
For realizing the uniformity of coke size, prior art is to use coking with dry coal and allocate certain proportion into and be crushed to grain
Degree≤0.4mm part accounts for more than 90%, the average maximum reflectivity of vitriniteFor >=2.0%, coking optical texture
100% is the coal of inert component.Realize the uniformity of coke size according to prior art, there is following limitation: 1) use dry
Dry coal coking is that coking coal is dried pretreatment, needs to build the drying device of coking coal.2) allocate certain proportion into pulverize
To≤0.4mm grade part account for more than 90%, the average maximum reflectivity of vitriniteFor >=2.0%, coking optical texture
Structure 100% is the coal of inert component, needs additionally to build ultrafine crusher and carries out finely divided to this coal.Therefore, existing
The construction investment realizing coke size uniformity method is bigger.
Summary of the invention
The technical problem to be solved is to provide a kind of method coke size uniformity simple, lower-cost
Control method.In the present invention, represent that the amount of coke size uniformity is set as coke size uniformity coefficient, represent with K, and
Order:
K=100000/ [(100-P)2* (more than or equal to 80mm grade coke proportion)+(70-P)2* (60～80mm grains
Level coke proportion)+(50-P)2* (40～60mm grade coke proportion)+(32.5-P)2* (25～40mm grade coke
Proportion)+(12.5-P)2* (less than 25mm grade coke proportion)]；
Wherein P represents coke particle mean size, and P=is (more than or equal to 80mm grade coke proportion * 100+60～80mm
Grade coke proportion * 70+40～60mm grade coke proportion * 50+25～40mm grade coke proportion * 32.5
+ less than 25mm grade coke proportion * 12.5)/100；
K value is the biggest represents that the ratio shared by amount of coke of deviation particle mean size is the least, i.e. the coke near particle mean size is got over
Many, then the uniformity of coke is the best, the voidage between coke can be the biggest.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that:
The control method of a kind of coke size uniformity, comprises the steps:
1) determine that Coal Blending Schemes is: bottle coal 5～30%, 1/3 coking coal 15～30%, rich coal 5～20%, coking coal 20～
50%, lean coal 3～15%；
2) control the grating of mixed coal, make each grade in mixed coal meet:
2.1) grade >=3mm moiety weight percentage≤25%, wherein grade >=5mm moiety weight percentage≤5%,
3mm≤grade ＜ 5mm moiety weight percentage 5～25%；
2.2) 0.5mm≤grade ＜ 3mm moiety weight percentage 40～50%, wherein 1mm≤grade ＜ 3mm moiety by weight
Percentage ratio 10～25%, 0.5mm≤grade ＜ 1mm moiety weight percentage 20～35%；
2.3) grade ＜ 0.5mm moiety weight percentage >=35%；
3) stove coking is entered.
Further, described step 1) in, bottle coal 10～20%, 1/3 coking coal 20～25%, rich coal 10～15%, coking coal
30～45%, lean coal 5～10%.
The present inventor is through studying discovery for a long period of time, due to stratification coking, phase in the middle and late stage of coking, carbonization chamber
Adjacent semicoke interlayer temperature gradient and contraction speed there are differences, and produce shrinkage stress, cause generation and the development of coke crackle.Its
In, coarse coal intragranular portion consistency is high, and structure synusia is many to be combined with covalent bond, and covalent bond energy is much larger than intermolecular attraction, works as phase
When there is coarse coal grain at adjacent semicoke bed boundary, coarse coal grain can hinder the development of crackle, causes coke size bigger than normal, the most burnt
Block Surface regularity is poor.And the pore of coke affects the development of crackle, the coke bulk coke ratio example that the porosity is high is high, and coke is uniform
Property is poor.The present invention carries out conservative control by rational coal blending and to the grating of mixed coal, can form compact reactor when coking
Long-pending, reduce the porosity of coke, thus beneficially the normal of coke crackle generates and extend, it is to avoid because too much bulky grain hinders
The extension of crackle and the coke size inequality that causes homogenize.Coal-blending coking is carried out, without coal damping, without type according to the inventive method
Coal, tradition more than 4.3 meters top dress coke oven dry coke quenching under the conditions of, the inventive method gained hot strength of coke CSR 65～72%,
M40 87～90%, M10 5.5～6.5%, coke size coefficient of uniformity K >=3%.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further detailed explanation.
There are 5 kinds of coking coal resources in certain factory, respectively numbered A mine-gas coal, B ore deposit 1/3 coking coal, C ore deposit rich coal, D ore deposit coking coal and E
Ore deposit lean coal.
Determine that Coal Blending Schemes, concrete each single grade coal and proportioning are shown in Table 1.
The Coal Blending Schemes of table 1 embodiment 1～4
| Coal | A mine-gas coal | B ore deposit 1/3 coking coal | C ore deposit rich coal | D ore deposit coking coal | E ore deposit lean coal |
| Adapted percentage by weight/% | 10 | 20 | 20 | 40 | 10 |
Controlling the grating of mixed coal, in the mixed coal of embodiment 1～4, each grain class distribution is specifically shown in Table 2.
Would indicate that the amount of coke size uniformity is set as coke size uniformity coefficient, represent with K, and make:
K=100000/ [(100-P)2* (more than or equal to 80mm grade coke proportion)+(70-P)2* (60～80mm grains
Level coke proportion)+(50-P)2* (40～60mm grade coke proportion)+(32.5-P)2* (25～40mm grade coke
Proportion)+(12.5-P)2* (less than 25mm grade coke proportion)]；
Wherein P represents particle mean size, and P=is (more than or equal to 80mm grade coke proportion * 100+60～80mm grade
Coke proportion * 70+40～60mm grade coke proportion * 50+25～40mm grade coke proportion * 32.5+ is little
In 25mm grade coke proportion * 12.5)/100.
The amount of each grade in the mixed coal of table 2 embodiment 1～4
Particle mean size P and the epigranular property coefficient of the coke of embodiment 1～4 are specifically shown in table 3.
The coke size composition of table 3 embodiment 1～4 and epigranular property coefficient
As can be seen from Table 2: in embodiment 1, in mixed coal, grade >=3mm moiety weight percentage reaches 34.06%,
0.5mm≤grade ＜ 3mm grade percentage by weight is 37.69%, and grade ＜ 0.5mm moiety weight percentage is 28.25%, no
Meet technical solution of the present invention 3) in the technical specification scope of mixed coal grating, from table 3 it can be seen that coking gained coke size
Uniformity is poor, and uniformity coefficient K value is 2.57.In embodiment 2, mixed coal grating is also unsatisfactory for technical solution of the present invention 3) in
The technical specification scope of mixed coal grating, coking gained coke size uniformity is the most poor, and uniformity coefficient K value is 2.65.Real
Executing in example 3 and embodiment 4, mixed coal grating is satisfied by technical solution of the present invention 3) in the technical specification scope of mixed coal grating,
Coking gained coke size uniformity is good, and uniformity coefficient K value is respectively 3.05 and 3.36.
Claims (2)
1. the control method of a coke size uniformity, it is characterised in that: the method comprises the steps:
1) determine that Coal Blending Schemes is: bottle coal 5～30%, 1/3 coking coal 15～30%, rich coal 5～20%, coking coal 20～50%, thin
Coal 3～15%；
2) control the grating of mixed coal, make each grade in mixed coal meet:
2.1) grade >=3mm moiety weight percentage≤25%, wherein grade >=5mm moiety weight percentage≤5%, 3mm≤
Grade ＜ 5mm moiety weight percentage 5～25%；
2.2) 0.5mm≤grade ＜ 3mm moiety weight percentage 40～50%, wherein 1mm≤grade ＜ 3mm moiety by weight percentage
Ratio 10～25%, 0.5mm≤grade ＜ 1mm moiety weight percentage 20～35%；
2.3) grade ＜ 0.5mm moiety weight percentage >=35%；
3) stove coking is entered.
The control method of coke size uniformity the most according to claim 1, it is characterised in that: described step 1) in, gas
Coal 10～20%, 1/3 coking coal 20～25%, rich coal 10～15%, coking coal 30～45%, lean coal 5～10%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN113845933A (en) * | 2021-09-08 | 2021-12-28 | 武汉钢铁有限公司 | Detection and adjustment method for coking coal granularity |
| CN114479892A (en) * | 2022-01-22 | 2022-05-13 | 太原理工大学 | Coal blending method for preparing high-strength low-reactivity coke |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994130A (en) * | 2012-12-25 | 2013-03-27 | 河北联合大学 | Method for coal blending for coking by high-metamorphic-grade weak caking coal |
| CN102994129A (en) * | 2012-12-03 | 2013-03-27 | 广东韶钢松山股份有限公司 | Gas coal blended coking blending coal and preparation method thereof |
| CN103205270A (en) * | 2012-01-11 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Long flame coal size grading control method |
| CN104140833A (en) * | 2014-07-11 | 2014-11-12 | 武汉钢铁(集团)公司 | Coal-blending and coke-making method involved with low G value 1/3 coking coal |
| JP2016065111A (en) * | 2014-09-22 | 2016-04-28 | 新日鐵住金株式会社 | Manufacturing method of coke |
-
2016
- 2016-05-16 CN CN201610320854.7A patent/CN105925294B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205270A (en) * | 2012-01-11 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Long flame coal size grading control method |
| CN102994129A (en) * | 2012-12-03 | 2013-03-27 | 广东韶钢松山股份有限公司 | Gas coal blended coking blending coal and preparation method thereof |
| CN102994130A (en) * | 2012-12-25 | 2013-03-27 | 河北联合大学 | Method for coal blending for coking by high-metamorphic-grade weak caking coal |
| CN104140833A (en) * | 2014-07-11 | 2014-11-12 | 武汉钢铁(集团)公司 | Coal-blending and coke-making method involved with low G value 1/3 coking coal |
| JP2016065111A (en) * | 2014-09-22 | 2016-04-28 | 新日鐵住金株式会社 | Manufacturing method of coke |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| CN109447434B (en) * | 2018-10-16 | 2022-03-15 | 武汉钢铁有限公司 | Method for determining charging granularity of coking coal and application of method in coking coal preparation process |
| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN110591748B (en) * | 2019-09-29 | 2021-03-09 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| 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 |
| CN115141665B (en) * | 2021-03-29 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Coke matched with Australian gas coal and coking method |
| CN113845933A (en) * | 2021-09-08 | 2021-12-28 | 武汉钢铁有限公司 | Detection and adjustment method for coking coal granularity |
| CN113845933B (en) * | 2021-09-08 | 2023-08-18 | 武汉钢铁有限公司 | Method for detecting and adjusting coking coal granularity |
| CN114479892A (en) * | 2022-01-22 | 2022-05-13 | 太原理工大学 | Coal blending method for preparing high-strength low-reactivity coke |
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| CN105925294B (en) | 2019-04-02 |
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Effective date of registration: 20170626 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan Applicant before: WUHAN IRON AND STEEL CORPORATION |
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