CN105925295A - Determining method for mixed coal particle size - Google Patents
Determining method for mixed coal particle size Download PDFInfo
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- CN105925295A CN105925295A CN201610320871.0A CN201610320871A CN105925295A CN 105925295 A CN105925295 A CN 105925295A CN 201610320871 A CN201610320871 A CN 201610320871A CN 105925295 A CN105925295 A CN 105925295A
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- mixed coal
- particle size
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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 determining method for the mixed coal particle size. The method comprises the following steps that 1, the mixed coal particle size distribution index is determined; 2, the control range of the mixed coal particle size distribution index is determined; 3, the fineness of the mixed coal is determined according to the mixed coal particle size distribution index range obtained in the step 2. According to the method, the mixed coal particle size distribution index and the mixed coal particle size distribution index control range are determined by studying the relation between the cohesiveness, the liquidity and the expansibility of high-cohesiveness coking coal, 1/3 coking coal and fat coal and particle size distribution of single coal, and then the fineness of the mixed coal is determined according to the mixed coal particle size distribution index control range. According to the given fineness of the mixed coal and the particle size distribution index control range, under the condition of being free of coal moisture control and briquette coal and under the dry quenching condition of a traditional top loading coke at the height of 4.3 meters or above, the coke thermal strength CSR obtained through coking is 65% to 72%, the M40 is 87% to 90%, and the M10 is 5.5% to 6.5%.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of determination method of mixed coal granularity.
Background technology
Mixed coal granularmetric composition is one of factor affecting coke strenth, and tradition top dress coke oven is typically by control
The fineness of mixed coal processed controls the granularmetric composition of mixed coal indirectly, at home, in the general as-fired coal in coke-oven plant
Control about 80 ± 2% less than the ratio of 3mm grade.The problem that prior art exists: fineness exists
When 80 ± 2%, in mixed coal, the shared percentage by weight of grade ＜ 0.3mm part is 33～40%, this part
The deterioration of fine coal coking capacity causes hot strength of coke to decline.
Summary of the invention
The technical problem to be solved is to provide a kind of determination method of mixed coal granularity, to seek
Under the conditions of equal coking coal resource, the best fit coal particle size composition of refining high-heat strength coke, promote
Coking enterprise profitability.
For realizing above-mentioned technical problem, the technical solution used in the present invention is as follows:
1) determine that mixed coal particle size distribution index is: grade >=shared weight hundred of 5mm part in mixed coal
The shared percentage by weight of proportion by subtraction, 3mm≤grade ＜ 5mm part, 0.3mm≤grade ＜ 3mm part institute
Account for percentage by weight and the shared percentage by weight of grade ＜ 0.3mm part.
2) determine that mixed coal particle size distribution control indexes scope is: grade >=5mm part institute in mixed coal
Account for that percentage by weight is not more than 8%, the shared percentage by weight of grade ＜ 0.3mm part is not more than 32%.
3) according to step 2) in mixed coal particle size distribution indication range determine mixed coal fineness: first, just
It is x that step drafts the fineness value index of mixed coal, then according to mixed coal fineness value index x drafted carries out powder
Broken, sieve, measure under this fineness index value, whether mixed coal particle size distribution index meets step 2) in set
Fixed scope, if it is satisfied, then determine that the fineness value index of mixed coal is x；If mixed coal particle size distribution
Indication range is unsatisfactory for step 2) the middle scope set, then mixed coal fineness is adjusted in the following manner:
3.1) if grade >=shared percentage by weight of 5mm part is more than step 2 in mixed coal particle size distribution)
The scope of middle setting, then improve mixed coal fineness value index x, so that mixed coal particle size distribution indication range is full
Foot step 2) the middle scope set；
3.2) if the shared percentage by weight of grade ＜ 0.3mm part is more than step in mixed coal particle size distribution
2) scope set in, then reduce mixed coal fineness value index x, so that mixed coal particle size distribution index model
Enclose and meet step 2) the middle scope set.
Known in those skilled in the art, coking coal, 1/3 coking coal and rich coal are coking Coal Gasification of Main Coal Species, support Jiao
Charcoal intensity relies primarily on above three coal, but the present inventor is through long-term experimental study conclusion
Find: these three kinds of coking coal different grain size ature of coal obvious differences, be shown in Table 1～table 3.
Table 1 different grain size coking coal A cohesiveness, mobility, swellability index
As can be seen from Table 1: the coking coal A of 0.5mm≤grade ＜ 3mm part, its G-value, maximum base
Family name's fluidity, maximum sub-swelling degree b% difficult to understand are all higher than or apparently higher than grade >=3mm part and grade ＜
After the grade >=5mm or grade ＜ 0.3mm of the coking coal A, coking coal A of 0.5mm part, its cohesiveness,
Mobility, dilatancy all deteriorate seriously.
Table 2 different grain size 1/3 coking coal B cohesiveness, mobility, swellability index
As can be seen from Table 2: size fractionated 1/3 coking coal B, 1mm≤grade ＜ 3mm part mobility
Higher than grade ＜ 1mm part by about 40%, the maximum swelling of grade >=3mm and grade ＜ 0.3mm part
Degree is significantly lower than 1/3 coking coal B of 0.3≤grade ＜ 3mm part, after 1/3 coking coal B grade ＜ 1mm,
Its mobility declines, and after the grade >=5mm or grade ＜ 0.3mm of 1/3 coking coal B, its dilatancy is deteriorated.
Table 3 different grain size rich coal C cohesiveness, mobility, swellability index
From table 3 test data it can be seen that 0.3mm≤grade ＜ 0.5mm, 0.5mm≤grade ＜ 1mm,
Rich coal C cohesiveness and the dilatancy of 1mm≤grade ＜ 2mm and 2mm≤grade ＜ 3mm part are suitable,
The best, and the rich coal C cohesiveness of grade ＜ 0.3mm and dilatancy are the most poor；Refer to from fluidity
From the point of view of Biao, the rich coal C mobility of 0.3mm≤grade ＜ 0.5mm and grade ＜ 0.3mm part is deteriorated.
The result of study of consolidated statement 1 to table 3 can obtain: strong cohesive property coking coal, 1/3 coking coal and rich coal are equal
Showing following characteristics: after grade ＜ 0.3mm, coking capacity deteriorates, its cohesiveness, mobility and expansion
Property all deteriorates substantially；After grade >=3mm, coking coal and 1/3 coking coal dilatancy decline, and rich coal dilatancy is protected
Hold 0.3mm≤grade ＜ 3mm demi-inflation level.Therefore, at identical coking coal resource and join on an equal basis
Under the conditions of coal ratio, the present invention sets mixed coal particle size distribution index as grade >=5mm part in mixed coal
Shared percentage by weight, 3mm≤grade ＜ 5mm part shared percentage by weight, 0.3mm≤grade ＜
The shared percentage by weight of 3mm part and the shared percentage by weight of grade ＜ 0.3mm part.The most true
Determining mixed coal particle size distribution control indexes scope is: grade >=shared weight percent of 5mm part in mixed coal
Ratio no more than 8%, the shared percentage by weight no more than 32% of grade ＜ 0.3mm part carries out mixed coal granularity
Control, obtain the hot strength of coke of optimum.Without coal damping, without moulded coal, more than 4.3 meters top dress Jiao of tradition
Under the conditions of stove dry coke quenching, the inventive method gained hot strength of coke CSR 65～72%, M40 87～
90%, M10 are 5.5～6.5%.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation.
The inventive method comprises the steps:
1) determine that mixed coal particle size distribution index is: grade >=shared weight hundred of 5mm part in mixed coal
The shared percentage by weight of proportion by subtraction, 3mm≤grade ＜ 5mm part, 0.3mm≤grade ＜ 3mm part institute
Account for percentage by weight and be less than percentage by weight shared by 0.3mm grade.
2) determine that mixed coal particle size distribution indication range is: grade >=shared weight of 5mm part in mixed coal
Amount percentage ratio is not more than 8%, is not more than 32% less than percentage by weight shared by 0.3mm grade.
3) according to step 2) in mixed coal particle size distribution indication range determine mixed coal fineness: first, just
It is 80% that step drafts the fineness value index of mixed coal, then according to the mixed coal fineness value index 80% drafted
Pulverizing, sieve, mensuration obtains grade in mixed coal >=shared percentage by weight of 5mm part and is
2.21%, 0.3mm≤shared percentage by weight of grade ＜ 3mm part is 42.29%, less than 0.3mm grain
The shared percentage by weight of level is 38.43%.Therefore, under this fineness value index, mixed coal particle size distribution index
It is unsatisfactory for step 2) the middle scope set, wherein the shared percentage by weight of grade ＜ 0.3mm part is bigger than normal,
The fineness value index redefining mixed coal is 75%；Then according to the mixed coal fineness value index drafted
75% pulverizes, and sieves, and mensuration obtains grade in mixed coal >=shared percentage by weight of 5mm part and is
3.22%, 0.3mm≤shared percentage by weight of grade ＜ 3mm part is 44.29%, less than 0.3mm grain
The shared percentage by weight of level is 30.45%.Mixed coal particle size distribution index meets step 2) the middle model set
Enclose, accordingly, it is determined that the fineness of mixed coal is 75%.
Illustrating: the broken hammer mill that generally uses of coking coal, the adjustment of fineness is by increase and decrease tup number
Amount and change tup size realize.Mixed coal fineness value refers to that granularity is less than the weight of 3mm coal charge and accounts for and join
Close the percentage ratio of coal gross weight.
Claims (1)
1. the determination method of a mixed coal granularity, it is characterised in that: the method includes as follows
Step:
1) determine that mixed coal particle size distribution index is: grade >=shared weight hundred of 5mm part in mixed coal
The shared percentage by weight of proportion by subtraction, 3mm≤grade ＜ 5mm part, 0.3mm≤grade ＜ 3mm part institute
Account for percentage by weight and the shared percentage by weight of grade ＜ 0.3mm part；
2) determine that mixed coal particle size distribution control indexes scope is: grade >=5mm part institute in mixed coal
Accounting for percentage by weight and be not more than 8%, the shared percentage by weight of grade ＜ 0.3mm part is not more than 32%；
3) according to step 2) in mixed coal particle size distribution indication range determine mixed coal fineness: first, just
It is x that step drafts the fineness value index of mixed coal, then according to mixed coal fineness value index x drafted carries out powder
Broken, sieve, measure under this fineness index value, whether mixed coal particle size distribution index meets step 2) in set
Fixed scope, if it is satisfied, then determine that the fineness value index of mixed coal is x；If mixed coal particle size distribution
Indication range is unsatisfactory for step 2) the middle scope set, then mixed coal fineness is adjusted in the following manner:
3.1) if grade >=shared percentage by weight of 5mm part is more than step 2 in mixed coal particle size distribution)
The scope of middle setting, then improve mixed coal fineness value index x, so that mixed coal particle size distribution indication range is full
Foot step 2) the middle scope set；
3.2) if the shared percentage by weight of grade ＜ 0.3mm part is more than step in mixed coal particle size distribution
2) scope set in, then reduce mixed coal fineness value index x, so that mixed coal particle size distribution index model
Enclose and meet step 2) the middle scope set.
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Cited By (2)
| 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 |
| CN111778048A (en) * | 2020-06-03 | 2020-10-16 | 河北中煤旭阳能源有限公司 | Method for regulating and controlling granularity of matched coal |
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| JP3724711B2 (en) * | 2001-01-29 | 2005-12-07 | Ｊｆｅスチール株式会社 | Particle size measuring device |
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| CN1049372A (en) * | 1990-09-29 | 1991-02-20 | 北京市燃气煤化工研究所 | A kind of blending method of coking |
| JP3724711B2 (en) * | 2001-01-29 | 2005-12-07 | Ｊｆｅスチール株式会社 | Particle size measuring device |
| CN101699266A (en) * | 2009-11-03 | 2010-04-28 | 武汉钢铁(集团)公司 | Method for determining optimal granularity of meager lean coal with caking index G of larger than 5-10 |
| CN101706406A (en) * | 2009-11-03 | 2010-05-12 | 武汉钢铁(集团)公司 | Method for determining optimal particle size of finely ground gas coal participating in coking and coal blending |
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Cited By (4)
| 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 |
| CN111778048A (en) * | 2020-06-03 | 2020-10-16 | 河北中煤旭阳能源有限公司 | Method for regulating and controlling granularity of matched coal |
| CN111778048B (en) * | 2020-06-03 | 2021-06-29 | 河北中煤旭阳能源有限公司 | Method for regulating and controlling granularity of matched coal |
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