CN101880541B - Method for producing primary metallurgical coke by using 1/3 charred coal in west Mongolia region as main blending coal - Google Patents
Method for producing primary metallurgical coke by using 1/3 charred coal in west Mongolia region as main blending coal Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 245
- 239000000571 coke Substances 0.000 title claims abstract description 43
- 238000002156 mixing Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000004939 coking Methods 0.000 claims abstract description 106
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 39
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 29
- 239000011593 sulfur Substances 0.000 claims abstract description 29
- 239000005864 Sulphur Substances 0.000 claims description 32
- 239000003337 fertilizer Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 15
- 239000004484 Briquette Substances 0.000 claims description 4
- 238000005272 metallurgy Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 abstract 2
- 239000003830 anthracite Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 27
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- 230000000704 physical effect Effects 0.000 description 3
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Abstract
The invention provides a method for producing primary metallurgical coke by using 1/3 charred coal in a west Mongolia region as main blending coal. The method comprises the following steps of: 1) adding sulfur rich coal in a local region and charred coal, gas coal and anthracite in a neighboring region into the 1/3 charred coal in the west Mongolia region to form coking blended coal containing less than or equal to 8.5 percent of ash, less than or equal to 0.7 percent of sulfur and about 27 percent of volatile matter, wherein the caking index of the coking blended coal is more than or equal to 70; and 2) producing the GB primary metallurgical coke by using a tamping coking process. The method successfully produces the GB primary metallurgical coke by using the 1/3 charred coal in the west Mongolia region, the rich coal and the charred coal, gas coal and anthracite in the neighboring region with the tamping coking process; the method realizes comprehensive utilization of local coal resources and resource conversion efficiency upgrade, and further promotes the economic value of the local coal resources; and the product meets the large-scale requirement of the iron and steel industry, and develops a market.
Description
Technical field
The present invention relates to production metallurgy Jiao field, particularly relate to covering regional 1/3 coking coal in west the method that is main coal blending production first-class metallurgical coke.
Background technology
Coal resources in China, from low rotten peat, brown coal to height rotten meager coal, hard coal, although great variety of goods, each coal proportion great disparity is very large, distributes very uneven.Account for 73% at existing proven reserve medium power coal, the coal that is applicable to coking only has 27%.In the feed coal of coking, bottle coal accounts for total reserves 13.3%, and rich coal accounts for 3.3%, and coking coal accounts for 5.9%, and lean coal accounts for 3.9%, and other coals account for 0.6%.The weak bottle coal of agglutinating value(of coal) accounts for coking coal resource approximately 50%, and strong close-burning rich coal and coking coal be less than 30%.High-quality easily choosing coking coal still less, and concentrate and be distributed in the North China.The incompatible contradiction of resource distribution and reserves and demand is comparatively outstanding.
Cover area, west next-door neighbour's Wuhai, the Wuhai area is the main coal production base of Inner Mongolia Autonomous Region, and 4,000,000,000 tons of the retained reserves in Wuhai area, will reach 2,000 ten thousand tons of producing capacities by 2010 at present, and Coal Gasification of Main Coal Species is 1/3 coking coal.The long-flame coal in god east area, the hard coal of Ningxia, China, appoint family's village coal, Mongolian coal, be near the main stable economic outer coal that supplies of periphery.
Since 2003, my company has carried out a large amount of Test And Research Works, has finally studied the production technique that 1/3 coking coal and non-coking coal with the Wuhai area coordinate the production secondary metallurgical, and has built and produce 700000 tons of coke ovens per year, batch production.So far produced significant economic and social benefit.After stably manufactured in a few years, for the grade of further improving the quality of products, explore the possibility of producing first-class metallurgical coke covering western regional economy, special this project of establishing.
As coking production, the final coke quality that obtains is good and bad, and its influence factor is a lot, but mainly contains two broad aspect: the one, and the proportioning of the ature of coal of feed coal and its various feed coals, this is primary, is also the most basic influence factor; The 2nd, coke making process and process control condition.Coal based on Meng Xi and surrounding area has the coals such as 1/3 coking coal, middle sulfur fertilizer coal, hard coal, and widely distributed, and has high-quality coking coal etc. economical outer for coal.How these coals are prepared and comprehensive utilization by comprehensive, realized transforming on the spot deep processing, produce the GB first-class metallurgical coke, the change resources advantage is economic advantages, has exigence.
Summary of the invention
The object of the invention is to provide a kind of to cover regional 1/3 coking coal in west as main coal blending, produce the processing method of first-class metallurgical coke, the method is by adding middle sulfur fertilizer coal, coking coal, bottle coal and sulphur content and the lower hard coal of ash oontent in the abundant sulphur content of local reserves and higher 1/3 coking coal of ash oontent, using tamping coking technique and produce the GB first-class metallurgical coke.
The invention provides a kind of production metallurgy Jiao method, said method comprising the steps of: the coking mixed coal that 1) is mixed with ash oontent≤8.5%, sulphur content content≤0.7%, volatile content ≈ 27%, caking index 〉=70 with 1/3 coking coal, middle sulfur fertilizer coal, coking coal, bottle coal and hard coal; 2) produce first-class metallurgical coke with tamping coking technique.
Standard by the GB/T1996-2003 first-class metallurgical coke is judged quality product.Ash content Ad≤12%,, sulfur≤6%, shatter strength M25 〉=92%, M40 〉=80%, abrasive wear resistance M10≤7%, reactive CRI≤30%, post-reaction strength CSR 〉=55%, fugitive constituent Vdaf≤1.8%.
Preferably, described 1/3 coking coal accounts for 55～59% of mixed coal gross weight, and is excellent in selecting 55～57%; Middle sulfur fertilizer coal accounts for 2～5% of mixed coal gross weight, is preferably 2～3%; Coking coal accounts for 14～17% of mixed coal gross weight, is preferably 15～17%; Bottle coal accounts for 7%～11% of mixed coal gross weight, is preferably 8～10%; Near covering the west, hard coal accounts for mixed coal gross weight 13～17%, is preferably 14～16%.
Preferably, the ash oontent in 1/3 coking coal of the present invention is 9.2～10.37%, and sulphur content content is 0.85～0.95%, and volatile content is 29.5～32.5%, and caking index is 83～87;
Ash oontent in described middle sulfur fertilizer coal is 25～27.4%, and sulphur content content is 1.3～1.6%, and volatile content is 25～27%, and caking index is 85;
Ash oontent in described bottle coal is 3.7～4.3%, and sulphur content content is 0.55～0.57%, and volatile content is 32～33.7%, and caking index is 79;
Ash oontent in described coking coal is 8.5～9.6%, and sulphur content content is 0.6～0.68%, and volatile content is 20～22%, and caking index is 77;
Ash oontent in described hard coal is 2.5～2.9%, and sulphur content content is 0.1～0.15%, and volatile content is 7～8%, and caking index is 0.
In order to realize reaching the economy of producing in the neighbourhood at Meng Xi, preferably, described 1/3 coking coal is preferably chessboard well coal for covering western area and peripheral reserves than 1/3 coking coal of horn of plenty; Middle sulfur fertilizer coal is that near Wuhai crow reaches sulfur fertilizer coal in the area; Coking coal is the osiery coal; Bottle coal is Mongolian bottle coal; Hard coal is too western coal.
Preferably, prepare described step 1) and comprise: hard coal is first pulverized separately, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, and the particle of wherein＜0.5mm accounts for 50%; And then mix and pulverize with 1/3 coking coal, the particle that is crushed to particle diameter≤3mm accounts for more than 85%.
Preferably, step 2 of the present invention) make firm by ramming described in and comprise: the moisture content of controlling coke making and coal blending is 10 ± 1%, and mechanical to make into it firm by ramming tap density be 1.0～1.1t/m with fiddling with
3Briquette (13200*450*4000).
Preferably, step 2 of the present invention) described in, coking comprises: the time of coking is 22 hours 30 minutes, and the temperature of coking is 1350 ℃, and the temperature at charge of coke center is 1000-1050 ℃.
And Meng Xi and widely distributed 1/3 coking coal is high due to ash content, sulfur in the neighbourhood can't directly be smelt secondary metallurgical, more can't refine first-class metallurgical coke.This project application coal blending principle is allocated local middle sulfur fertilizer coal, near bottle coal, hard coal, coking coal into.
In this Coal Blending Schemes, cost situation according to indigenous coal and economic supply coal, try hard to use as much as possible local chessboard well 1/3 coking coal and middle sulfur fertilizer coal, join on this basis too western coal and fall to play the effect that ash falls in sulphur, join Mongolian coal and osiery coal with the cohesiveness that increases coal blending and the physicals of adjusting coking.
Generally speaking, the present invention passes through tamping coking technique, by add middle sulfur fertilizer coal, high-quality coking coal, bottle coal and sulphur content and the lower hard coal of ash oontent in the abundant sulphur content of local reserves and higher 1/3 coking coal of ash oontent, use tamping coking technique and produce the GB first-class metallurgical coke, realize comprehensive utilization and the resource conversion of local coal resources, promoted the economic worth of local coal resources.For the grade of further improving the quality of products, explore the possibility of the additive-free economic production first-class metallurgical coke in this locality.
Embodiment
Now the present invention is further illustrated by following instance, but the present invention is not limited to this.
1, formulate Coal Blending Schemes
1.1 the kind of coal
Originate from 1/3 coking coal in Yu Mengxi area, have coking behavior preferably, grey high-sulfur is high-leveled and difficult to be washed, and general clean fine coal ash oontent can be controlled in 10.50%, and sulphur content can be controlled in 0.95%.Due to ash content and sulphur content all higher, therefore separately during coking, can not produce qualified GB first-class metallurgical coke.
In this Coal Blending Schemes, cost situation according to indigenous coal and economic supply coal, try hard to use as much as possible local chessboard well coal (1/3 coking coal) and middle sulfur fertilizer coal, join on this basis too western coal and fall to play the effect that ash falls in sulphur, join Mongolian bottle coal and osiery coal with the cohesiveness that increases coal blending and the physicals of adjusting coking.
1.2 the principle of coal blending and principle
Hard coal is not coking coal, the present invention uses and makes technique firm by ramming, and it is allocated in coking coal, and the non-coking coal of allocating into and 1/3 coking coal are combined closely, fuse into one in process of coking, the plastic mass that 1/3 coking coal produces is distributed among the non-coking coal that does not produce plastic mass; Efficient melting, bonding in the coking process form hard-packed coke button, make the coke of refining reach the physical strength of secondary metallurgical and the index request of hot performance.In addition, the non-coking coal of low grey low-sulfur, allocate 1/3 coking coal coking into, ash content and the sulphur content of metallurgical coke can be reduced and the swelling pressure of coking coal to coke oven in process of coking can be reduced, to avoid the phenomenon of coke pushing difficulty, join middle sulfur fertilizer coal, Mongolian bottle coal and osiery coal when guaranteeing ash content sulphur content, increase the cohesiveness of coal blending and the physicals of adjustment coking.
When definite coke making and coal blending scheme, can guarantee that coke quality satisfies under the prerequisite of one-level level metallurgical coke requirement, utilize to greatest extent local and peripheral coal resources, raw materials cost and the transportation cost produced to reduce coking are converted into economic advantages with resources advantage.
1.3 the formulation of Coal Blending Schemes
At first, the local raw material coal has been carried out analysis of experiments, guarantee on the basis of mixed coal ash content, volatile matter, sulphur content and caking index index, simultaneously, the impact of non-coking coal STRENGTH ON COKE mechanical property that consideration is joined, then according to the analytical results design Coal Blending Schemes of feed coal, above analysis of experiments method therefor all adopts relevant coal and coking industry project detection method standard.
Preferably, the ash oontent in 1/3 coking coal of the present invention is 9.2～10.37%, and sulphur content content is 0.85～0.95%, and volatile content is 29.5～32.5%, and caking index is 83～87;
Ash oontent in described middle sulfur fertilizer coal is 25～27.4%, and sulphur content content is 1.3～1.6%, and volatile content is 25～27%, and caking index is 85;
Ash oontent in described bottle coal is 3.7～4.3%, and sulphur content content is 0.55～0.57%, and volatile content is 32～33.7%, and caking index is 79;
Ash oontent in described coking coal is 8.5～9.6%, and sulphur content content is 0.6～0.68%, and volatile content is 20～22%, and caking index is 77;
Ash oontent in described hard coal is 2.5～2.9%, and sulphur content content is 0.1～0.15%, and volatile content is 7～8%, and caking index is 0.
Concrete ash content, sulphur content content according to advance 1/3 coking coal, principle according to the coking mixed coal that is mixed with ash oontent≤8.5%, sulphur content content≤0.7%, volatile content ≈ 27%, caking index 〉=70, take into account the impact that non-coking coal adds the STRENGTH ON COKE mechanical property, consider that simultaneously the cost variance of various coals is grasped flexibly on the basis that guarantees above-mentioned requirements.Assurance is produced the GB first-class metallurgical coke with low cost.
Wherein, described local 1/3 coking coal accounts for 55～59% of mixed coal gross weight, is preferably 55～57%; In the locality, the sulfur fertilizer coal accounts for 2～5% of mixed coal gross weight, is preferably 2～3%; Near high-quality coking coal accounts for 14～17% of mixed coal gross weight, is preferably 15～17%; Near bottle coal accounts for 7%～11% of mixed coal gross weight, is preferably 8～10%; Near hard coal accounts for mixed coal gross weight 13～17%, is preferably 14～16%.
2, tamping coking technique
The tamping coking technique principle is to improve mixed coal cohesiveness by increasing the coal charge bulk density, thereby raising coke quality, being characterized in can the polygamy high volatile coal, weak cohesiveness non-caking coal even, after the coal that will work good with plug ramming machine is smash into briquette, push the coking technology that carries out high temperature carbonization in coking chamber from coke oven machine side in the coal bin of coal-charging pusher machine.
Adopt tamping coking technique production metallurgy Jiao's detailed process just as follows.
1) coal blending: hard coal is first pulverized separately, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, and the particle of wherein＜0.5mm accounts for 50%; And then mix and pulverize with 1/3 coking coal, the particle that is crushed to particle diameter≤3mm accounts for more than 85%.The moisture content of controlling coke making and coal blending is 10 ± 1%, and mechanical to make into it firm by ramming tap density be 1.0～1.1t/m3 briquette (13200*450*4000) with fiddling with.
2) coking: adopt spray under TJL4350D molded breadth coking chamber, duplex, waste gas circulation, heat type one side-arranged tamping coke oven, wet quenching.
3) coke making process condition: the time of coking is 22 hours 30 minutes, and the temperature of coking is controlled to be 1350 ℃, and the temperature at charge of coke center is 1000-1050 ℃.
4) the sieve storage is burnt: adopt the scraper plate coke feeder put-focus, double-deck screen shale shaker adds individual layer screening, Leather Belt Conveyance.
3, coking result
With the coke that above Coal Blending Schemes and above technological process are refined out, ash content Ad≤12%,, sulfur≤0.6%, shatter strength M25 〉=92%, M40 〉=80%, abrasive wear resistance M10≤7%, reactive CRI≤30%, post-reaction strength CSR 〉=55%, fugitive constituent Vdaf≤1.8%.Meet first-class metallurgical coke specification of quality in quality standard for metallurgical coke (GB/T1996-2003).
Through above refining process, although the ash oontent of some coking coal is higher, up to 10.35%, sulphur content content is also higher, up to 0.95%, but through in advance main coal blending and other being coordinated the chemical examination of pit ash, sulphur content equal size, grasp the situation of feed coal, then under the prerequisite that satisfies mixed coal requirement index, take into account economic principle, the design Coal Blending Schemes, and technological process according to the rules just can be refined out and met the GB first-class metallurgical coke.
Claims (8)
1. production metallurgy Jiao method, it is characterized in that, said method comprising the steps of: the coking mixed coal that 1) is mixed with ash oontent≤8.5%, sulphur content content≤0.7%, volatile content ≈ 27%, caking index 〉=70 with 1/3 coking coal, middle sulfur fertilizer coal, coking coal, bottle coal and hard coal; 2) produce the GB/T1996-2003 first-class metallurgical coke with tamping coking technique;
In described mixed coal, by weight, 1/3 coking coal accounts for 55～59% of mixed coal gross weight; Middle sulfur fertilizer coal accounts for 2～5% of mixed coal gross weight; Coking coal accounts for 14～17% of mixed coal gross weight; Bottle coal accounts for 7%～11% of mixed coal gross weight; Hard coal accounts for mixed coal gross weight 13～17%.
2. method according to claim 1, is characterized in that, in described mixed coal, 1/3 coking coal accounts for 55～57% of mixed coal gross weight; Middle sulfur fertilizer coal accounts for 2～3% of mixed coal gross weight; Coking coal accounts for mixed coal gross weight 15～17%; Bottle coal accounts for 8～10% of mixed coal gross weight; Hard coal accounts for 14～16% of mixed coal gross weight.
3. method according to claim 2, is characterized in that, by weight, the ash oontent in described 1/3 coking coal is 9.2～10.37%, and sulphur content content is 0.85～0.95%, and volatile content is 29.5～32.5%, and caking index is 83～87;
Ash oontent in described middle sulfur fertilizer coal is 25～27.4%, and sulphur content content is 1.3～1.6%, and volatile content is 25～27%, and caking index is 85;
Ash oontent in described bottle coal is 3.7～4.3%, and sulphur content content is 0.55～0.57%, and volatile content is 32～33.7%, and caking index is 79;
Ash oontent in described coking coal is 8.5～9.6%, and sulphur content content is 0.6～0.68%, and volatile content is 20～22%, and caking index is 77;
Ash oontent in described hard coal is 2.5～2.9%, and sulphur content content is 0.1～0.15%, and volatile content is 7～8%, and caking index is 0.
4. method according to claim 3, is characterized in that, described 1/3 coking coal is near 1/3 coking coal regional the reaching in illiteracy west; Middle sulfur fertilizer coal is near the middle sulfur fertilizer coal regional the reaching in illiteracy west; Coking coal is near the coking coal regional the reaching in illiteracy west; Bottle coal is near the bottle coal regional the reaching in illiteracy west; Hard coal is near the hard coal regional the reaching in illiteracy west.
5. method according to claim 3, is characterized in that, described 1/3 coking coal is near 1/3 coking coal regional the reaching in illiteracy west; Middle sulfur fertilizer coal is the middle sulfur fertilizer coal that the Wuhai crow reaches the area; Coking coal is the osiery coal; Bottle coal is Mongolian bottle coal; Hard coal is too western coal.
6. according to claim 4 or 5 described methods, is characterized in that, in described step 1), preparation comprises: hard coal is first pulverized separately, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, and the particle of wherein＜0.5mm accounts for 50%; And then mix and pulverize with other coals, the particle that is crushed to particle diameter≤3mm accounts for more than 85%.
7. method according to claim 6, is characterized in that step 2) described in make firm by ramming and comprise: the moisture content of controlling coke making and coal blending is 10 ± 1%, and mechanical to make into it firm by ramming tap density be 1.0～1.1t/m with fiddling with
3Briquette.
8. method according to claim 7, is characterized in that step 2) described in coking comprise: the time of coking is 22 hours 30 minutes, and the temperature of coking is 1350 ℃, and the temperature at charge of coke center is 1000-1050 ℃.
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| CN102559227B (en) * | 2010-12-10 | 2014-03-19 | 上海梅山钢铁股份有限公司 | Method for coal blending coking through utilizing Gieseler fluidity index |
| CN102863978B (en) * | 2012-10-11 | 2014-04-02 | 云南煤业能源股份有限公司 | Method for coking with non-coking blind coal |
| EA022518B1 (en) * | 2012-10-22 | 2016-01-29 | Открытое Акционерное Общество "Губахинский Кокс" | Method of coke producing for non-ferrous metals smelting |
| CN102925183A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Hot tamping coking method |
| JP6014012B2 (en) * | 2013-12-04 | 2016-10-25 | 株式会社神戸製鋼所 | Coke production method and coke |
| CN103923678B (en) * | 2014-04-24 | 2015-07-08 | 武汉钢铁(集团)公司 | Coking coal blending method of improving homogeneity coefficient of coke size |
| CN107011934B (en) * | 2017-05-31 | 2020-06-26 | 临沂恒昌焦化股份有限公司 | Coal blending coking method doped with waste activated carbon and coking method thereof |
| CN109212157A (en) * | 2018-09-21 | 2019-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of detection method and its application of the single grade coal bulbs of pressure |
| CN109022007B (en) * | 2018-10-17 | 2021-10-08 | 贵州大学 | Tamping coking process for blending anthracite and gas coal in large proportion |
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