CN102690670B - Coal blending and coking method with participation of 1/3 coking coal having volatile of 28-32% - Google Patents
Coal blending and coking method with participation of 1/3 coking coal having volatile of 28-32% Download PDFInfo
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Abstract
The invention discloses a coal blending and coking method with participation of 1/3 coking coal having the volatile of 28-32%. The caking index G value of the 1/3 coking coal is larger than or equal to 85, and the maximum thickness Y value of a plastic layer is larger than or equal to 20.0mm. The method includes the steps: firstly, detecting gieseler fluidity of single types of coal to obtain themaximum fluidity MF and rubber expansion b of the coal; and secondly, determining a coal blending scheme according to the detection results obtained at the step one, using the coal as fat coal for coal blending when the maximum fluidity MF is equal to or larger than 10000ddpm while the rubber expansion b is equal to or larger than 150%, and using the coal as 1/3 coking coal for coal blending whenthe maximum fluidity MF is smaller than 10000ddpm while the rubber expansion b is smaller than 150%. The 1/3 coking coal with the volatile of 28-32% is reasonably differentiated according to indexes of the maximum fluidity MF and rubber expansion b and then subjected to coal blending and coking, so that coal resources can be effectively utilized. Coke quality is stably improved without adoption of coal humidifying, coal briquette technique and pre-crushing process, and CSR (coke strength after reaction) of cokes coked in coke ovens higher than 6m is larger than 63%.
Description
Technical field
The invention belongs to the coke making and coal blending technical field, be specifically related to the coke making and coal blending method that a kind of volatilization is divided into the 1/3 coking coal participation of 28-32%.
Background technology
In recent years, along with the fast development of iron and steel enterprise, the demand of coking coal is heightened, especially sticking coal (rich coal, coking coal and 1/3 coking coal) demand is higher by force for the centering metamorphic grade.In the coal blending scheme, the effect of coking coal, rich coal and 1/3 coking coal is diverse, coking coal is the main support of coke quality, rich coal works rheological and the swelling property of adjusting mixed coal in coal-blending coking, but a certain amount of weak viscosity coking coal of adapted, provide certain granular texture to support the coke thermal characteristics simultaneously, 1/3 coking coal mainly provides granular texture and supports the coke thermal characteristics.
According to Chinese Coal Classification standard (GB 5751-2009), 1/3 coking coal volatile matter〉28.0-37.0%, the G value〉65, Y value≤25.0.In China, the use of such coking coal is mainly depended on vitrinite reflectance and the distribution thereof of traditional coal index and coal petrography index, all there are certain defective in these two kinds of indexs and combined index thereof, exist middle volatile matter 1/3 coking coal of larger difference to carry out coal-blending coking according to these methods to the character of plastic mass, adapted 1/3 coking coal reasonably, so have a strong impact on refine coke quality.
Summary of the invention
Technical problem to be solved by this invention provides a kind of coke making and coal blending method, with reasonable adapted dry ash-free basis volatile matter〉28.0%-32.0%, caking index G value 〉=85,1/3 coking coal of maximum thickness of plastic layer Y value 〉=20.0mm.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Measure inferior turgidity b difficult to understand and measure its maximum fluidity MF with the Giseeler fluidity of carrying out single kind coal:
Maximum fluidity MF 〉=10000ddpm and inferior turgidity b difficult to understand 〉=150% are as the rich coal adapted;
Maximum fluidity MF＜10000ddpm or inferior turgidity b difficult to understand＜150% are as 1/3 coking coal adapted.
Further, the maximum fluidity MF of described 1/3 coking coal 〉=10000ddpm and inferior turgidity b difficult to understand 〉=150% are designated as 1/3 coking coal 1#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-8%; Rich coal: 5-10%; 1/3 coking coal 1#:0-10%; Other 1/3 coking coal: 20-35% that are different from 1/3 coking coal 1#; Coking coal: 30-45%; Lean coal: 7-15%.
Further, the maximum fluidity MF of described 1/3 coking coal＜10000ddpm or inferior turgidity b difficult to understand＜150%, and single coal coking coarse grain pattern structure ratio CM 〉=35% of planting, as high-quality 1/3 coking coal adapted, namely its per-cent that accounts for the coal blending gross weight is 15-30%;
Further, difficult to understand inferior turgidity b＜150% of described 1/3 coking coal, and its single coal coking coarse grain pattern structure ratio CM 〉=35% of planting are designated as 1/3 coking coal 2#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; 1/3 coking coal 2#:15-30%; Other 1/3 coking coal: 0-15% that are different from 1/3 coking coal 2#; Coking coal: 30-45%; Lean coal: 7-15%.
Further, the maximum fluidity MF of described 1/3 coking coal＜10000ddpm,, and its single coal coking coarse grain pattern structure ratio CM 〉=35% of planting, being designated as 1/3 coking coal 3#, the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; 1/3 coking coal 3#:15-30%; Other 1/3 coking coal: 10-15% that are different from 1/3 coking coal 3#; Coking coal: 30-45%; Lean coal: 7-15%.
Further, if maximum fluidity MF＜10000ddpm or inferior turgidity b difficult to understand＜150%, and single coal coking coarse grain pattern structure ratio CM＜35% of planting, as general ature of coal 1/3 coking coal adapted, namely its per-cent that accounts for the coal blending gross weight is not higher than 15%.
Further, difficult to understand inferior turgidity b＜150% of described 1/3 coking coal, and single coal coking coarse grain pattern structure ratio CM＜35% of planting are designated as 1/3 coking coal 4#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 4#; 1/3 coking coal 4#:5-15%; Coking coal: 30-45%; Lean coal: 7-15%.
Further, the maximum fluidity MF of described 1/3 coking coal＜10000ddpm, and single coal coking coarse grain pattern structure ratio CM＜35% of planting are designated as 1/3 coking coal 5#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; 1/3 coking coal 5#:10-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 5#; Coking coal: 30-45%; Lean coal: 7-15%.
The present invention is by single maximum fluidity of planting coal, inferior turgidity difficult to understand and coking coarse grain pattern structure ratio index, to the dry ash-free basis volatile matter〉28.0 ~ 32.0%, caking index G value〉85,1/3 coking coal of maximum thickness of plastic layer Y value 〉=20.0mm is rationally distinguished adapted, height is flowed high 1/3 coking coal that expands as the rich coal adapted, and by single further adapted amount of differentiation 1/3 coking coal of coal coking coarse grain pattern structure ratio CM of planting, be conducive to optimize adapted, bring into play its effect to greatest extent and save the high-quality caking coal resource, do not adopting the coal damping, under the condition of shaped coal technology and precomminution technology, at the CSR of coke oven institute coking charcoal more than 6 meters〉63%.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment.
Coking coal of the present invention is the dry ash-free basis volatile matter〉28.0 ~ 32.0%, caking index G value 〉=85,1/3 coking coal of maximum thickness of plastic layer Y value 〉=20.0mm.Its coke making and coal blending method is as follows:
If inferior turgidity b difficult to understand 〉=150% and maximum fluidity MF 〉=10000ddpm are as the rich coal adapted;
If maximum fluidity MF＜10000ddpm or inferior turgidity b difficult to understand＜150%, single coal coking coarse grain pattern structure ratio CM 〉=35% of planting, as high-quality 1/3 coking coal adapted, the adapted amount is 15-30%;
If maximum fluidity MF＜10000ddpm or inferior turgidity b difficult to understand＜150%, single coal coking coarse grain pattern structure ratio CM＜35% of planting, as general ature of coal 1/3 coking coal adapted, the adapted amount is not higher than 15%;
Each single coal coal analysis of planting the results are shown in Table 1.
The single coal coal analysis result that plants of table 1
For the coal sample 1 of last table, because inferior turgidity b difficult to understand〉150%, Giseeler fluidity is greater than 10000ddpm, as the rich coal adapted; For example, carry out coal blending according to following weight percent: bottle coal: 0-5%; Gas-fat coal: 3-8%; Rich coal: 5-10%; Coal sample 1:0-10%; Other 1/3 coking coal: 20-35% that are different from 1/3 coking coal 1#; Coking coal: 30-45%; Lean coal: 7-15%.More preferably, bottle coal: 4%; Gas-fat coal: 6%; Rich coal: 5%; Coal sample 1:10%; Other 1/3 coking coal that are different from 1/3 coking coal 1#: 23%; Coking coal: 40%; Lean coal: 12%.Carrying out coal blending by above method, under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, is 63.2% at the CSR of coke oven institute coking charcoal more than 6 meters.
For the coal sample 2 of last table, because its inferior turgidity b difficult to understand＜150%, single coal coking coarse grain of planting is inlayed index CM〉35%, as high-quality 1/3 coking coal adapted, the adapted amount is 15-30%.As carrying out coal blending according to following weight percent: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; Coal sample 2:15-30%; Other 1/3 coking coal: 0-15% that are different from 1/3 coking coal 2#; Coking coal: 30-45%; Lean coal: 7-15%.More preferably, bottle coal: 4%; Gas-fat coal: 6%; Rich coal: 14%; Coal sample 2:21%; Other 1/3 coking coal that are different from 1/3 coking coal 2#: 10%; Coking coal: 37%; Lean coal: 8%.Carrying out coal blending by above method, under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, is 63.3% at the CSR of coke oven institute coking charcoal more than 6 meters.
For the coal sample 3 of last table, because its Giseeler fluidity, is singly planted coal coking coarse grain pattern structure ratio CM less than 10000ddpm〉35%, as high-quality 1/3 coking coal adapted, the adapted amount is 15-30%.As carrying out coal blending according to following weight percent: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; Coal sample 3:15-30%; Other 1/3 coking coal: 10-15% that are different from 1/3 coking coal 3#; Coking coal: 30-45%; Lean coal: 7-15%.More preferably, bottle coal: 2%; Gas-fat coal: 8%; Rich coal: 8%; Coal sample 3:20%; Other 1/3 coking coal that are different from 1/3 coking coal 3#: 10%; Coking coal: 40%; Lean coal: 12%.Carrying out coal blending by above method, under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, is 63.3% at the CSR of coke oven institute coking charcoal more than 6 meters.
For the coal sample 4 of last table, since its inferior turgidity b difficult to understand＜150%, single coal coking coarse grain pattern structure ratio CM＜35% of planting, and as general ature of coal 1/3 coking coal adapted, the adapted amount is not higher than 15%.As carrying out coal blending according to following weight percent: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 4#; Coal sample 4:5-15%; Coking coal: 30-45%; Lean coal: 7-15%.More preferably, bottle coal: 3%; Gas-fat coal: 5%; Rich coal: 13%; Other 1/3 coking coal that are different from 1/3 coking coal 4#: 20%; Coal sample 4:11%; Coking coal: 38%; Lean coal: 10%.Carrying out coal blending by above method, under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, is 64.2% at the CSR of coke oven institute coking charcoal more than 6 meters.
For the coal sample 5 of last table, because its Giseeler fluidity, is singly planted coal coking coarse grain pattern structure ratio CM＜35% less than 10000ddpm, as general ature of coal 1/3 coking coal adapted, the adapted amount is not higher than 15%.As carrying out coal blending according to following weight percent: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; Coal sample 5:10-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 5#; Coking coal: 30-45%; Lean coal: 7-15%.More preferably, bottle coal: 2%; Gas-fat coal: 6%; Rich coal: 15%; Coal sample 5:15%; Other 1/3 coking coal that are different from 1/3 coking coal 5#: 10%; Coking coal: 42%; Lean coal: 10%.Carrying out coal blending by above method, under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, is 63.3% at the CSR of coke oven institute coking charcoal more than 6 meters.
Claims (1)
1. a volatilization is divided into the coke making and coal blending method that 1/3 coking coal of 28-32% participates in, caking index G value 〉=85 of this 1/3 coking coal, and maximum thickness of plastic layer Y value 〉=20.0mm is characterized in that: comprise the steps:
1) the mensuration list is planted the difficult to understand inferior turgidity b of coal and is carried out Giseeler fluidity and measure its maximum fluidity MF;
2) determine the coal blending scheme according to the step 1) detected result:
21) maximum fluidity MF 〉=10000ddpm and inferior turgidity b difficult to understand 〉=150% as the rich coal adapted, are designated as 1/3 coking coal 1#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-8%; Rich coal: 0-10%; 1/3 coking coal 1#:0-10%; Other 1/3 coking coal: 20-35% that are different from 1/3 coking coal 1#; Coking coal: 30-45%; Lean coal: 7-15%;
22) maximum fluidity MF＜10000ddpm or inferior turgidity b difficult to understand＜150%, as 1/3 coking coal adapted, and:
221) difficult to understand inferior turgidity b＜150% of described 1/3 coking coal, and its single coal coking coarse grain pattern structure ratio CM 〉=35% of planting as 1/3 coking coal adapted, are designated as 1/3 coking coal 2#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; 1/3 coking coal 2#:15-30%; Other 1/3 coking coal: 0-15% that are different from 1/3 coking coal 2#; Coking coal: 30-45%; Lean coal: 7-15%;
222) the maximum fluidity MF of described 1/3 coking coal＜10000ddpm, and its single coal coking coarse grain pattern structure ratio CM 〉=35% of planting as 1/3 coking coal adapted, are designated as 1/3 coking coal 3#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 5-10%; Rich coal: 5-15%; 1/3 coking coal 3#:15-30%; Other 1/3 coking coal: 10-15% that are different from 1/3 coking coal 3#; Coking coal: 30-45%; Lean coal: 7-15%;
223) difficult to understand inferior turgidity b＜150% of described 1/3 coking coal, and single coal coking coarse grain pattern structure ratio CM＜35% of planting as 1/3 coking coal adapted, are designated as 1/3 coking coal 4#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 4#; 1/3 coking coal 4#:5-15%; Coking coal: 30-45%; Lean coal: 7-15%;
224) the maximum fluidity MF of described 1/3 coking coal＜10000ddpm, and single coal coking coarse grain pattern structure ratio CM＜35% of planting as 1/3 coking coal adapted, are designated as 1/3 coking coal 5#, and the per-cent that each single kind coal accounts for the coal blending gross weight is: bottle coal: 0-5%; Gas-fat coal: 3-10%; Rich coal: 5-15%; 1/3 coking coal 5#:10-15%; Other 1/3 coking coal: 15-25% that are different from 1/3 coking coal 5#; Coking coal: 30-45%; Lean coal: 7-15%.
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| CN102863980B (en) * | 2012-10-15 | 2014-06-18 | 武汉钢铁(集团)公司 | Proportioning method for high-expansion low-flowing coking coal |
| CN103468291B (en) * | 2013-10-11 | 2014-12-03 | 武汉钢铁(集团)公司 | Coking blending method for controlling volatile compound content of blended coal at 28-29% |
| CN104109548B (en) * | 2014-06-30 | 2016-06-29 | 武汉钢铁(集团)公司 | The coke making and coal blending method that fluidity >=1000ddpm bottle coal participates in |
| CN104818039B (en) * | 2015-04-17 | 2018-01-12 | 武汉钢铁有限公司 | The application method of the low rotten coking coal of fugitive constituent Vdaf >=30% |
| CN105112083B (en) * | 2015-08-20 | 2017-10-17 | 河北钢铁股份有限公司邯郸分公司 | A kind of method of high volatile coke making and coal blending |
| CN110964552B (en) * | 2018-09-30 | 2021-06-01 | 武钢集团昆明钢铁股份有限公司 | Method for classifying main mixed coking coal for coking |
| CN110283607B (en) * | 2019-07-20 | 2022-05-06 | 武钢集团昆明钢铁股份有限公司 | Construction and application of coking system of coking coal |
| CN113621393B (en) * | 2021-07-21 | 2022-11-01 | 武汉钢铁有限公司 | Classification matching method of coking coal with 18-22% of volatile matter |
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