CN105925295B - Cooperate the determination method of coal particle size - Google Patents
Cooperate the determination method of coal particle size Download PDFInfo
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- CN105925295B CN105925295B CN201610320871.0A CN201610320871A CN105925295B CN 105925295 B CN105925295 B CN 105925295B CN 201610320871 A CN201610320871 A CN 201610320871A CN 105925295 B CN105925295 B CN 105925295B
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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 kind of determination methods for cooperating coal particle size.This method comprises the following steps: 1) determining cooperation coal particle distribution index；2) cooperation coal particle distribution norm controlling range is determined；3) mixed coal fineness is determined according to cooperation coal particle distribution indication range in step 2).The relationship that the present invention passes through research strong cohesive property coking coal, 1/3 coking coal and rich coal cohesiveness, mobility and dilatancy and the size distribution of single grade coal, it determines cooperation coal particle distribution index and cooperation coal particle distribution norm controlling range, determines mixed coal fineness further according to cooperation coal particle distribution norm controlling range.According to given mixed coal fineness and size distribution norm controlling range, in no coal damping, without moulded coal, under the conditions of the dress coke oven dry coke quenching of 4.3 meters of tradition or more top, hot strength of coke CSR obtained by coking is in 65~72%, M40 in 87~90%, M10 5.5~6.5%.
Description
Technical field
The invention belongs to metallurgical coking technology fields, and in particular to a kind of determination method for cooperating coal particle size.
Background technique
Mixed coal granularmetric composition is to influence one of the factor of coke strenth, and tradition top dress coke oven generally passes through control mixed coal
Fineness indirectly control the granularmetric composition of mixed coal, at home, controlled in the general as-fired coal in coke-oven plant less than the ratio of 3mm grade
80 ± 2% or so.Problem of the existing technology: fineness is at 80 ± 2%, in mixed coal shared by the part grade < 0.3mm
Weight percent is 33~40%, and the deterioration of this part fine coal coking capacity causes hot strength of coke to decline.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of determination methods for cooperating coal particle size, are being refined on an equal basis with seeking
Under the conditions of coking coal resource, the best fit coal particle size composition of high-heat strength coke is refined, coking enterprise profitability is promoted.
To realize above-mentioned technical problem, The technical solution adopted by the invention is as follows:
1) cooperation coal particle distribution index is determined are as follows: weight percent shared by grade >=part 5mm, 3mm in mixed coal≤
Weight percent shared by weight percent shared by the part grade < 5mm, 0.3mm≤part grade < 3mm and the portion grade < 0.3mm
Weight percent shared by point.
2) cooperation coal particle distribution norm controlling range is determined are as follows: weight percent shared by grade >=part 5mm in mixed coal
Than being not more than 32% no more than weight percent shared by the 8%, part grade < 0.3mm.
3) mixed coal fineness is determined according to cooperation coal particle distribution indication range in step 2): firstly, tentatively drafting cooperation
The fineness value index of coal is x, is then crushed according to the mixed coal fineness value index x drafted, is sieved, measures the fineness index
Under value, whether cooperation coal particle distribution index meets the range set in step 2), if it is satisfied, then determining the fineness of mixed coal
Value index is x；If cooperation coal particle distribution indication range is unsatisfactory for the range set in step 2), mixed coal fineness is pressed
Following manner is adjusted:
3.1) if weight percent shared by grade >=part 5mm in coal particle distribution is cooperated to be greater than setting in step 2)
Range then improves mixed coal fineness value index x, so that cooperation coal particle distribution indication range meets the model set in step 2)
It encloses；
3.2) if weight percent shared by the part grade < 0.3mm in coal particle distribution is cooperated to be greater than setting in step 2)
Range, then reduce mixed coal fineness value index x, so that cooperation coal particle distribution indication range meets the model set in step 2)
It encloses.
Coking coal, 1/3 coking coal and rich coal are coking Coal Gasification of Main Coal Species known in those skilled in the art, support coke strenth master
Rely on above three coal, but the present inventor has found by long-term experimental study conclusion: this three kinds of coking coals are not
One-size coal quality difference is obvious, is shown in Table 1~table 3.
1 different grain size coking coal A cohesiveness of table, mobility, swellability index
As can be seen from Table 1: 0.5mm≤part grade < 3mm coking coal A, G value, maximum Giseeler fluidity, maximum Austria
Sub- dilation b% is higher than or is apparently higher than grade >=3mm part and the part grade < 0.5mm coking coal A, the grade of coking coal A
After >=5mm or grade < 0.3mm, cohesiveness, mobility, dilatancy are all deteriorated seriously.
2 different grain size of table, 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 are than the portion grade < 1mm
Point high by about 40%, the maximum dilatation of grade >=3mm and the part grade < 0.3mm is significantly lower than the part 0.3≤grade < 3mm
After 1/3 coking coal B, 1/3 coking coal B grade < 1mm, mobility declines, after grade >=5mm or grade the < 0.3mm of 1/3 coking coal B,
Its dilatancy is deteriorated.
3 different grain size rich coal C cohesiveness of table, mobility, swellability index
From 3 test data of table it can be seen that 0.3mm≤grade < 0.5mm, 0.5mm≤grade < 1mm, 1mm≤grade <
2mm and 2mm≤part grade < 3mm rich coal C cohesiveness and dilatancy are suitable, all very good, and the rich coal of grade < 0.3mm
C cohesiveness and dilatancy are obviously poor；From the point of view of fluidity index, 0.3mm≤grade < 0.5mm and the part grade < 0.3mm
Rich coal C mobility be deteriorated.
The result of study of consolidated statement 1 to table 3 is available: strong cohesive property coking coal, 1/3 coking coal and rich coal show following
Feature: after grade < 0.3mm, coking capacity deterioration, cohesiveness, mobility and dilatancy are deteriorated obviously；After grade >=3mm,
Coking coal and the decline of 1/3 coking coal dilatancy, rich coal dilatancy keep 0.3mm≤grade < 3mm demi-inflation horizontal.Therefore, exist
Under the conditions of identical coking coal resource and same blending ratio, the present invention sets cooperation coal particle distribution index are as follows: grade in mixed coal
Weight percent shared by weight percent shared by the part >=5mm, 3mm≤part grade < 5mm, 0.3mm≤part grade < 3mm
Weight percent shared by shared weight percent and the part grade < 0.3mm.Further determine cooperation coal particle distribution index
Control range are as follows: weight percent shared by grade >=part 5mm is not more than 8% in mixed coal, weight shared by the part grade < 0.3mm
Amount percentage carries out cooperation coal particle size control no more than 32%, obtains optimal hot strength of coke.In no coal damping, without moulded coal,
Under the conditions of the dress coke oven dry coke quenching of 4.3 meters of tradition or more top, hot strength of coke CSR obtained by the method for the present invention exists in 65~72%, M40
87~90%, M10 are 5.5~6.5%.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
The method of the present invention includes the following steps:
1) cooperation coal particle distribution index is determined are as follows: weight percent shared by grade >=part 5mm, 3mm in mixed coal≤
Weight percent shared by weight percent shared by the part grade < 5mm, 0.3mm≤part grade < 3mm and be less than 0.3mm grade
Shared weight percent.
2) cooperation coal particle distribution indication range is determined are as follows: weight percent shared by grade >=part 5mm is not in mixed coal
Greater than 8%, it is less than weight percent shared by 0.3mm grade and is not more than 32%.
3) mixed coal fineness is determined according to cooperation coal particle distribution indication range in step 2): firstly, tentatively drafting cooperation
The fineness value index of coal is 80%, is then crushed according to the mixed coal fineness value index 80% drafted, and is sieved, and measurement obtains
Weight percent shared by grade >=part 5mm is weight percent shared by 2.21%, 0.3mm≤part grade < 3mm in mixed coal
Than being 42.29%, being less than weight percent shared by 0.3mm grade is 38.43%.Therefore, under the fineness value index, mixed coal grain
Degree distribution index is unsatisfactory for the range set in step 2), and wherein weight percent shared by the part grade < 0.3mm is bigger than normal, again
The fineness value index for determining mixed coal is 75%；Then it is crushed, is sieved according to the mixed coal fineness value index 75% drafted,
It is shared by 3.22%, 0.3mm≤part grade < 3mm that measurement, which obtains weight percent shared by grade in mixed coal >=part 5mm,
Weight percent is 44.29%, and being less than weight percent shared by 0.3mm grade is 30.45%.Cooperate coal particle distribution index full
The range set in sufficient step 2), accordingly, it is determined that the fineness of mixed coal is 75%.
Illustrate: the broken of coking coal generally uses hammer mill, and the adjustment of fineness passes through increase and decrease tup quantity and change
Tup size is realized.Mixed coal fineness value refers to that granularity accounts for the percentage of mixed coal total weight less than the weight of 3mm coal charge.
Claims (1)
1. a kind of determination method for cooperating coal particle size, it is characterised in that: this method comprises the following steps:
1) cooperation coal particle distribution index is determined are as follows: weight percent shared by grade >=part 5mm, 3mm≤grade in mixed coal
Weight percent shared by weight percent shared by the part < 5mm, 0.3mm≤part grade < 3mm and the part grade < 0.3mm institute
Account for weight percent；
2) cooperation coal particle distribution norm controlling range is determined are as follows: weight percent shared by grade >=part 5mm is not in mixed coal
Greater than 8%, weight percent shared by the part grade < 0.3mm is not more than 32%；
3) mixed coal fineness is determined according to cooperation coal particle distribution norm controlling range in step 2): firstly, tentatively drafting cooperation
The fineness value index of coal is x, is then crushed according to the mixed coal fineness value index x drafted, is sieved, measures the fineness value and refer to
Under mark, whether cooperation coal particle distribution index meets the range set in step 2), if it is satisfied, then determining the fineness of mixed coal
Value index is x；If cooperation coal particle distribution index is unsatisfactory for the range set in step 2), to mixed coal fineness by following
Mode is adjusted:
3.1) if weight percent shared by grade >=part 5mm in coal particle distribution is cooperated to be greater than the model set in step 2)
It encloses, then improves mixed coal fineness value index x, so that cooperation coal particle distribution index meets the range set in step 2)；
3.2) if weight percent shared by the part grade < 0.3mm in coal particle distribution is cooperated to be greater than the model set in step 2)
It encloses, then reduces mixed coal fineness value index x, so that cooperation coal particle distribution index meets the range set in step 2).
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| 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 |
| 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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| 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 |
| 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 |
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2016
- 2016-05-16 CN CN201610320871.0A patent/CN105925295B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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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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