CN103740391A - Method of coal blending for coking by steam coal pretreatment - Google Patents
Method of coal blending for coking by steam coal pretreatment Download PDFInfo
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- CN103740391A CN103740391A CN201310670838.7A CN201310670838A CN103740391A CN 103740391 A CN103740391 A CN 103740391A CN 201310670838 A CN201310670838 A CN 201310670838A CN 103740391 A CN103740391 A CN 103740391A
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Abstract
The invention provides a method of coal blending for coking by steam coal pretreatment, which comprises the following steps: putting lignite, long flame coal, weakly caking coal, and non-caking coal in a furnace, performing dry distillation at a temperature of 450-550 DEG C to reach a Vdaf of volatile components of 13-20%, putting the coal in a ball mill to obtain particles with a particle size of less than 1 mm to keep in reserve; well mixing the dry-distilled steam coal with coking coal with a weight ratio of 0.05-0.08:1, putting into the furnace for coking. The coking coal comprises 130 coking coal, 1890 gas-fat coal, Ningxia 1/3 coking coal, Liuhuanggou fat coal, dry-distilled semicoke, Baicheng mixed coal, Kuqa gas coal, and low-temperature dry-distilled 42# long flame coal, and has a coke strength M40 of 77.0-78.0. According to the method, steam coal with particles being less than 1 mm is used for coal blending for coking instead of gas coal, and coke strength M40 is increased by 0.4%.
Description
Technical field
The present invention relates to coal-blending coking technology, especially, by steam coal destructive distillation pre-treatment Ti Dai Of-thin coal, bottle coal, meager coal, obtain metallurgical coke method cheaply, result of use is splendid.
Background technology
The producting proportion of tradition metallurgical coke is, coking coal+rich coal+Of-thin coal+bottle coals+(1/3 coking coal)+meager coal is basic coal blending framework, or select single coal coking of planting according to the requirement of Coke Quality and resource situation, normally bottle coal refines coke for ferroalloy, pretreated steam coal noncoking, in order to expand coking coal resource, weakly caking coal or non-caking coal are used for to coking, (coal is dry to be suitable for the various new technologies of conventional coke oven coal-blending coking, preheating, select to pulverize, make firm by ramming, join moulded coal, the artificial binding agent Huo of adapted Of-thin agent etc.) reached industrialized level, thereby become, solve the main method of producing high-quality coke with poor coking coal, but aforesaid method does not have substantial change to the immanent structure of weakly caking coal or non-caking coal and composition, and pretreated weakly caking coal, the volatile matter of non-caking coal reduces, vitrinite reflectance increases, it is fine and close that structure becomes, its Thermal Decomposition Characteristics is to the Thermal Decomposition Characteristics transition of medium rank coal, for non-coking coal (brown coal, long-flame coal, weakly caking coal, non-caking coal) coal blending coking technology, also there is employing directly to mix a small amount of (brown coal, weakly caking coal, long-flame coal, non-caking coal) coal carries out coal-blending coking, to directly mixing a small amount of steam coal coal-blending coking weak point, be mainly reduced coke cold, the lumpiness of hot peptide intensity and coke, Zuo allocates a small amount of coke powder into Wei Of-thin agent, pulverized anthracite, compare genus inert substance with pretreated steam coal, volatile matter is low, poor with the plastic mass fusion faculty that coking coal forms, the research and development of the Japanese < < SCOPE21 coking technology that in industrial production, the amount of allocating into low (being less than 2%) is known are heat-treated with moulded coal of hot pressing and are processed all raw materials (100%) with using > > before entering coke oven, and this technology actual be the integration of coal preheating and coking of shaping coal technique, that the thermal pretreatment temperature of coarse grain Bed for Fine Coal is respectively to 350 ℃ and 165 ℃, do not change the structure and composition of steam coal.
The present invention by the semicoke Ti of steam coal (brown coal, weakly caking coal, long-flame coal, non-caking coal) destructive distillation for Bu Fen Of-thin coal, bottle coal, meager coal coal-blending coking, increase the method for new coal-blending coking, improve the quality of the hot and cold peptide intensity of coke, the ash content that reduces coke, sulphur content raising coke, compare with traditional scheme, reduce costs, improve the utilization ratio of resource, there is important application and popularization value.
Summary of the invention
Order of the present invention is: by steam coal destructive distillation, the semicoke Ti of destructive distillation, for Bu Fen Of-thin coal, bottle coal, meager coal coal-blending coking, has reduced cost, reaches again utilization of resources best-of-breed technology effect.
The object of the present invention is achieved like this: a kind of pretreated coal-blending coking method of steam coal, and steam coal is brown coal or long-flame coal or weakly caking coal or non-caking coal; Implement step by step;
The destructive distillation of step 1 steam coal: steam coal is placed in to destructive distillation at 450-550 ℃ of temperature in stove, to volatile matter Vdaf, when the 13-20%, is placed in the particle that ball mill obtains < 1mm, standby;
Step 2 coal blending:
Destructive distillation steam coal and coking coal are mixed to the burnt refining of shove charge with weight percent 0.05-0.08:1;
Wherein coking coal is that 2130 coking coal, 1890 gas-fat coals, Ningxia 1/3 coking coal, sulphur ditch rich coal, Pyrolysis Char, Baicheng mixed coal, storehouse car bottle coal, low-temperature pyrolysis 42# long-flame coal, coke strenth M40 are 77.0-78.0;
Wherein the operation parameter of coking coal is: ash content 8-12%, volatile matter 17-42%, thickness of colloidal matter layer 12-32, characteristic of char residue 5-7 level, caking index 75-103; Wherein selecting 42# long-flame coal characteristic of char residue is 2 grades.
Described method, is used the steam coal below particle 1mm, substitutes bottle coal coal-blending coking, and coke M40 improves 0.4%.
Action principle of the present invention: bonding mechanism is to rely on to mix this plastic mass producing of coal in being heated process, the plastic mass that the easy heated mixing coal of pretreated steam coal itself produces bonds, and to the pretreated temperature and time of steam coal, is that the height that steam coal that basis is measured pretreated different ratios is by experiment allocated the caking index of heavy caking coal into is determined best steam coal processing scheme.The research and development of Japan < < SCOPE21 coking technology are heat-treated with moulded coal of hot pressing and are processed all raw materials (100%) with using > > before entering coke oven; And the present invention by the semicoke Ti of steam coal destructive distillation for Bu Fen Of-thin coal, bottle coal, meager coal coal-blending coking, increase the method for new coal-blending coking, both increased the kind of coal-blending coking raw material, improve the quality of the hot and cold peptide intensity of coke, the ash content that reduces coke, sulphur content raising coke, reduce again coking cost, for enterprise energy-saving and cost-reducing, make demonstration, shown technical progress.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment
Process flow sheet of the present invention: steam coal → low-temperature pyrolysis → fragmentation → in proportion and the mix → coking of other coking coal.
The operation steps of present method:
1) selecting steam coal is brown coal or long-flame coal or weakly caking coal or non-caking coal;
2) steam coal destructive distillation: steam coal is placed in to destructive distillation at 550 ℃ of temperature in stove, to volatile matter Vdaf, 20% time, then uses grate discharge ball mill (￠ 2700*3600) to be ground into 0.95mm, standby;
3) coal blending: destructive distillation steam coal and coking coal are mixed to the burnt refining of shove charge with weight percent 0.05-0.08:1;
Wherein mix coal blending: after destructive distillation steam coal mixes in 5% ratio and other coking coal, the burnt refining of shove charge; The coking coal of wherein selecting is: coking coal, rich coal, bottle coal, gas-fat coal, 1/3 coking coal;
Wherein single mixing coal blending: after destructive distillation steam coal mixes in 30% ratio and single coking coal or bottle coal or rich coal or gas-fat coal or 1/3 coking coal, shove charge coking, with addition of 30% amount according to single cohesiveness of planting coking coal.
The coking coal that present method is selected is that 130 coking coal, 1890 gas-fat coals, Ningxia 1/3 coking coal, sulphur ditch rich coal, Pyrolysis Char, Baicheng mixed coal, storehouse car bottle coal, low-temperature pyrolysis 42# long-flame coal, coke strenth M40 are 77.0-78.0; Wherein the operation parameter of coking coal is: ash content 8-12%, volatile matter 17-42%, thickness of colloidal matter layer 12-32, characteristic of char residue 5-7 level, caking index 75-103; Wherein selecting 42# long-flame coal characteristic of char residue is 2 grades.
Described method, is used the steam coal below particle 1mm, substitutes bottle coal coal-blending coking, and coke M40 improves 0.4%.
3) mix coal blending:
After proportioning 1 destructive distillation steam coal mixes in 5% ratio and other coking coal again, the burnt refining of shove charge; The coking coal of wherein selecting is: coking coal, rich coal, bottle coal, gas-fat coal, 1/3 coking coal;
After proportioning 2 destructive distillation steam coals mix in 30% ratio and single coking coal or bottle coal or rich coal or gas-fat coal or 1/3 coking coal, shove charge coking, with addition of 30% amount according to single cohesiveness of planting coking coal.
The technique effect checking of present method:
1) experiment is the cleaned coal of selecting with coal: 42# long-flame coal after Baicheng mixed coal, storehouse car bottle coal, Ningxia 1/3 coking coal, sulphur ditch rich coal, Xinjiang Coking Coal Group 1890 colliery gas-fat coals, 2130 colliery coking coal, destructive distillation, its technical analysis and coking property index are in Table 1.
The technical analysis result of the 42# long-flame coal that the various coking coal of table 1 and destructive distillation are processed
| Coal | Ad/% | Vdaf/% | Characteristic of char residue | Ymm | GR.I |
| Baicheng mixed coal | 10.64 | 26.27 | 7 | 21 | 76 |
| Storehouse car bottle coal | 8.40 | 38.97 | 5 | 11 | 78 |
| Ningxia 1/3 coking coal | 11.26 | 34.05 | 6 | 14 | 75 |
| Sulphur ditch rich coal, | 9.85 | 32.13 | 7 | 30 | 101 |
| 1890 gas-fat coals | 8.16 | 41.32 | 7 | 32 | 103 |
| 2130 coking coal | 11.58 | 22.36 | 7 | 12 | 81 |
| 42# long-flame coal after destructive distillation | 8.11 | 17.80 | 2 | - | - |
Table 2 testing program
By upper table data, learnt: proportioning 1 is basic proportioning, the pretreated long-flame coal of proportioning 2 use 5% substitutes 5% Baicheng mixed coal, wherein proportioning 2 pre-treatment steam coal granularities are all passed through 0.95mm, the storehouse car bottle coal of proportioning 3 use pre-treatment long-flame coal replacing wholes 6%, the ature of coal of mixed coal and coke quality are in Table 3,4.
Each mixed coal coal data of table 3
By upper table data, learnt: after pre-treatment steam coal, all mixed coal fugitive constituents, G value, b value reduce, and with b value, reduce the most obvious.
Table 420kg coke oven coke quality
| ? | Mad | Ad | Vdaf | Sad | M40 | M10 | Mean particle size |
| Proportioning 1 | 0.27 | 12.36 | 1.13 | 0.42 | 77.0 | 6.4 | 44.32 |
| Proportioning 2 | 0.17 | 12.76 | 1.32 | 0.42 | 78.0 | 7.4 | 41.78 |
| Proportioning 3 | 0.09 | 13.50 | 1.86 | 0.41 | 77.4 | 7.8 | 45.34 |
By upper table data, learnt: basic proportioning coke strenth is 77.0%/6.4%; After the Baicheng mixing coal of pre-treatment long-flame coal alternative 5%, after allocating 0.95mm grade pre-treatment steam coal into, coke M40 raises 1.0%, uses the pre-treatment long-flame coal replacing whole bottle coal coal-blending coking of particle 0.95mm grade, and coke M40 improves 0.4%, M10 raises simultaneously, and the granularity of coke increases.
2) there were significant differences with not pretreated long-flame coal for pretreated long flame, in pretreated long-flame coal oxygen-containing functional group, carboxyl decreasing ratio reaches more than 90%, the compact structure of coal, vitrinite reflectance are by 0.526 to 1.123, the feature of thermolysis is to the Thermal Decomposition Characteristics transition of medium rank coal, and vigorous reaction temperature is by 480 ℃ of original passing to 580 ℃.
3) caking index of allocating heavy caking coal into by measuring the steam coal of pretreated different ratios is determined best steam coal processing scheme, and measuring method and step are with reference to conventional caking index method, and various mix proportion schemes are in Table 5; Pretreated steam coal: standard is smokeless=--g:--g:5g, the wherein GR.I=104 of rich coal, Y=33mm, Vdaf=39.56%.
Table 5
| Pyrolysis temperature ℃ | Steam coal quality g | Rich coal quality g | Hard coal quality g | G |
| 550 | 0.05 | 0.95 | 5.00 | 105 |
| 550 | 0.10 | 0.90 | 5.00 | 102 |
| 550 | 0.15 | 0.85 | 5.00 | 102 |
| 550 | 0.20 | 0.80 | 5.00 | 99 |
| 550 | 0.25 | 0.75 | 5.00 | 98 |
| 550 | 0.30 | 0.70 | 5.00 | 97 |
| 600 | 0.05 | 0.95 | 5.00 | 103 |
| 600 | 0.10 | 0.90 | 5.00 | 100 |
| 600 | 0.15 | 0.85 | 5.00 | 97 |
| 600 | 0.20 | 0.80 | 5.00 | 97 |
| 600 | 0.25 | 0.75 | 5.00 | 94 |
| 600 | 0.30 | 0.70 | 5.00 | 90 |
By upper table data, learnt: contrast long-flame coal that 550 ℃ of destructive distillation process and allocate the caking index of the heavy caking coal of different ratios into and be better than the long-flame coal that 600 ℃ of destructive distillation are processed.
The present invention adopts semicoke replacement Bu Fen Of-thin coal, bottle coal, the meager coal coal-blending coking of steam coal (brown coal, long-flame coal, non-caking coal, weakly caking coal) destructive distillation, increases the method for new coal-blending coking, increases the kind of new coal blending raw material.
Claims (2)
1. the pretreated coal-blending coking method of steam coal, is characterized in that: steam coal is brown coal or long-flame coal or weakly caking coal or non-caking coal; Implement step by step;
The destructive distillation of step 1 steam coal: steam coal is placed in to destructive distillation at 450-550 ℃ of temperature in stove, to volatile matter Vdaf, when the 13-20%, is placed in the particle that ball mill obtains < 1mm, standby;
Step 2 coal blending:
Destructive distillation steam coal and coking coal are mixed to the burnt refining of shove charge with weight percent 0.05-0.08:1;
Wherein coking coal is that 130 coking coal, 1890 gas-fat coals, Ningxia 1/3 coking coal, sulphur ditch rich coal, Pyrolysis Char, Baicheng mixed coal, storehouse car bottle coal, low-temperature pyrolysis 42# long-flame coal, coke strenth M40 are 77.0-78.0;
The operation parameter of coking coal is: ash content 8-12%, volatile matter 17-42%, thickness of colloidal matter layer 12-32, characteristic of char residue 5-7 level, caking index 75-103; Wherein selecting 42# long-flame coal characteristic of char residue is 2 grades.
2. method according to claim 1, is characterized in that: use the steam coal below particle 1mm, substitute bottle coal coal-blending coking, coke M40 improves 0.4%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104087328A (en) * | 2014-07-31 | 2014-10-08 | 孙孟君 | Coke oven coking method for improving ratio of long flame coal for chemical coke |
| CN107523319A (en) * | 2017-08-15 | 2017-12-29 | 宝钢集团新疆八钢铁有限公司 | A kind of method that coking increases high-quality gas rich coal amount of allocating |
| CN110257094A (en) * | 2019-07-10 | 2019-09-20 | 成渝钒钛科技有限公司 | A method of optimizing allocation of resources reduces coal blending cost |
| CN111303922A (en) * | 2020-03-20 | 2020-06-19 | 武汉科技大学 | Coking coal and coking method for top-loaded coke by using same |
| CN113544237A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for evaluating coal, method for producing coal blend, and method for producing coke |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104087328A (en) * | 2014-07-31 | 2014-10-08 | 孙孟君 | Coke oven coking method for improving ratio of long flame coal for chemical coke |
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| CN107523319A (en) * | 2017-08-15 | 2017-12-29 | 宝钢集团新疆八钢铁有限公司 | A kind of method that coking increases high-quality gas rich coal amount of allocating |
| CN113544237A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for evaluating coal, method for producing coal blend, and method for producing coke |
| CN110257094A (en) * | 2019-07-10 | 2019-09-20 | 成渝钒钛科技有限公司 | A method of optimizing allocation of resources reduces coal blending cost |
| CN111303922A (en) * | 2020-03-20 | 2020-06-19 | 武汉科技大学 | Coking coal and coking method for top-loaded coke by using same |
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Application publication date: 20140423 |