CN101870875B - Method for producing metallurgical coke from 1/3 coking coal and non-coking coal - Google Patents
Method for producing metallurgical coke from 1/3 coking coal and non-coking coal Download PDFInfo
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- CN101870875B CN101870875B CN 200910082916 CN200910082916A CN101870875B CN 101870875 B CN101870875 B CN 101870875B CN 200910082916 CN200910082916 CN 200910082916 CN 200910082916 A CN200910082916 A CN 200910082916A CN 101870875 B CN101870875 B CN 101870875B
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- 239000003245 coal Substances 0.000 title claims abstract description 156
- 238000004939 coking Methods 0.000 title claims abstract description 110
- 239000000571 coke Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 38
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000005864 Sulphur Substances 0.000 claims description 24
- 239000002956 ash Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 238000005272 metallurgy Methods 0.000 claims description 8
- 239000004484 Briquette Substances 0.000 claims description 4
- 239000010883 coal ash Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- 239000011593 sulfur Substances 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract 1
- 239000000470 constituent Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010181 polygamy Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The invention provides a method for producing metallurgical coke from 1/3 coking coal and non-coking coal, which comprises the following steps of: 1), preparing coking mixed coal which has an ash content of less than or equal to 10 percent, a the sulfur content of less than or equal to 0.9 percent, a volatile matter content of less than or equal to 32.0 percent and a caking index of more than or equal to 65, by using the 1/3 coking coal and the non-coking coal; and 2), producing GB secondary metallurgical coke through a tamping coking process. The GB secondary metallurgical coke is successfully produced by using the 1/3 coking coal and the non-coking coal through the tamping coking process; comprehensive utilization and resource transformation of local coal resources are realized; and economic value of the local coal resources is improved.
Description
Technical field
The present invention relates to production metallurgy Jiao field, particularly relate to the method for utilizing 1/3 coking coal and non-coking coal production metallurgy Jiao.
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 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.
Wuhai and surrounding area thereof are the main coal production bases of Inner Mongolia Autonomous Region, and 44.3 hundred million tons of total reservess have possessed 6,000,000 tons of producing capacities at the beginning of 2002, and Coal Gasification of Main Coal Species is 1/3 coking coal, meager coal, long-flame coal, hard coal etc.Wherein, 1/3 coking coal in Wuhai area, the long-flame coal in area, god east, the Coal Gasification of Main Coal Species such as hard coal of Ningxia, China, reserves are larger.Since the beginning of the sixties in last century, Baogang coking Factory had once carried out a large amount of Test And Research Works, but thought that the coal in 100% Wuhai area, use Inner Mongol is main coal source, the metallurgical coke that adopts top dress technique to produce suitable large blast furnace smelting use is impossible.
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 coals, this is primary, is also the most basic influence factor; The 2nd, coke making process and process control condition.Coal based on Inner Mongol Wuhai and surrounding area has the coals such as 1/3 coking coal, long-flame coal, hard coal, and widely distributed, how these coals are prepared and comprehensive utilization by comprehensive, realize transforming on the spot deep processing, produce the GB secondary metallurgical, become resources advantage and have exigence into economic advantages.
Summary of the invention
For above technological deficiency, the object of the invention is to provide a kind of use 1/3 coking coal and non-coking coal production metallurgy Jiao's processing method, the method is by adding sulphur content and the lower non-coking 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 secondary metallurgical.
The invention provides a kind of production metallurgy Jiao method, said method comprising the steps of: 1) 1/3 coking coal and non-coking coal are mixed with the coke making and coal blending of ash oontent≤10.0%, volatile content≤32.0%, sulphur content content≤0.9%, caking index 〉=65,2) burnt with the tamping coking technique production metallurgy, making the ash oontent in metallurgical coke is≤13.5%, sulphur content content≤0.8%, volatile content≤1.8%, metallurgical coke intensity M40 〉=76%, M25 〉=88%, M10≤8.5%, reactive CRI≤35%, post-reaction strength CSR 〉=50%.
Preferably, described 1/3 coking coal is that Inner Mongol Wuhai and surrounding area reserves are than 1/3 coking coal of horn of plenty; Non-coking coal is long-flame coal and the hard coal of Inner Mongol Wuhai and surrounding area.
Preferably, described 1/3 coking coal accounts for 70～85% of coal blending gross weight, is preferably 78-85%; Non-coking coal accounts for 15～30% of coal blending gross weight, is preferably 15～22%.
Preferably, contain in described metallurgical coking coal: by weight, 1/3 coking coal of 78-85%, the long-flame coal of 10-12%, and the hard coal of 5-10%.
Preferably, the ash oontent 10.3～10.55% in 1/3 coking coal of the present invention, sulphur content content 0.9～1.1%, volatile content 29.5～32.5%, caking index 80～92; Ash oontent 3.5～4.3% in described long-flame coal, sulphur content content 0.25～0.3%, volatile content 37～40%, caking index are 0; Ash oontent 5.5～7% in described hard coal, sulphur content content 0.24～0.29%, volatile content 9～10%, caking index are 0.
Preferably, prepare described step 1) and comprise: hard coal and long-flame coal are first pulverized separately respectively, 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 ℃.
Hard coal and long-flame coal are not coking coals, 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 physical strength that the metallurgical coke of refining is up to state standards and the index request of hot performance.In addition, the non-coking coal of low grey low-sulfur is allocated 1/3 coking coal coking into, can reduce ash content and the sulphur content of metallurgical coke and can reduce the swelling pressure of coking coal to coke oven in process of coking, to avoid the phenomenon of coke pushing difficulty.Have, anthracitic petrographic constituent reduces string stress in the time of can making in process of coking coke shrinkage, the coke crackle is reduced, and improves physical strength, and improves the heat reactivity of coke again.
Generally speaking, the present invention successfully utilizes 1/3 coking coal and non-coking coal production secondary metallurgical by tamping coking technique; Realize comprehensive utilization and the resource conversion of local coal resources, promoted the economic worth of local coal resources.
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 of Inner Mongol Wuhai and periphery, have coking behavior preferably, grey high-sulfur is high-leveled and difficult to be washed, and general clean fine coal ash oontent reaches 10.55%, and sulphur content reaches 1.1%.Due to ash content and sulphur content all higher, therefore separately during coking, can not produce qualified GB secondary metallurgical.
Near the Wuhai of Inner Mongol Pingluo is produced Taixi anthracite and is had the advantages such as special low ash, special low-sulfur, allocates into during coking to be conducive in right amount improve the coke oeverall quality, but should note its broken fineness.
Near the Wuhai of Inner Mongol refreshing mansion is produced long-flame coal and is also had the advantages such as special low ash, special low-sulfur, and price is low, but because its fugitive constituent is higher, the fugitive constituent of allocating too much mixed coal into will exceed standard, and affect intensity and the wear resistance characteristic of finished product coke, thus affect coke quality, therefore should allocate in right amount.
1.2 the principle of coal blending and principle
Hard coal and long-flame coal are not coking coals, 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 is allocated 1/3 coking coal coking into, can reduce ash content and the sulphur content of metallurgical coke and can reduce the swelling pressure of coking coal to coke oven in process of coking, to avoid the phenomenon of coke pushing difficulty.Have, anthracitic petrographic constituent reduces string stress in the time of can making in process of coking coke shrinkage, the coke crackle is reduced, and improves physical strength, and improves the heat reactivity of coke again.
When definite coke making and coal blending scheme, under the prerequisite that can guarantee the requirement of coke quality meeting tier 2 metallurgical coke, 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 10.3～10.55% in 1/3 coking coal of the present invention, sulphur content content 0.9～1.1%, volatile content 29.5～32.5%, caking index 80～92; Ash oontent 3.5～4.3% in described long-flame coal, sulphur content content 0.25～0.3%, volatile content 37～40%, caking index are 0; Ash oontent 5.5～7% in described hard coal, sulphur content content 0.24～0.29%, volatile content 9～10%, caking index are 0.
Concrete ash content, sulphur content content according to advance 1/3 coking coal, become the principle of ash oontent≤10.0%, sulphur content content≤0.9%, volatile content≤32.0%, caking index 〉=65 according to mixed coal, 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 secondary metallurgical with low cost.
Wherein, described 1/3 coking coal accounts for 70～85% of mixed coal gross weight, is preferably 78-85%; Long-flame coal accounts for 10-12%, and hard coal accounts for 5-10%, and two kinds are mixed coal and account for 15～30% of gross weight; Be preferably 15～22%.
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 and long-flame coal are first pulverized separately respectively, 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 oontent≤13.5%, sulphur content content≤0.8%, volatile content≤1.8%, metallurgical coke intensity M40 〉=76%, M25 〉=88%, M10≤8.5%, reactive CRI≤35%, post-reaction strength CSR 〉=50%.Meet secondary metallurgical 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 10.55%, sulphur content content is also higher, up to 1.1%, but to the ash content of coking coal and non-coking coal, the chemical examination of sulphur content equal size, grasp the situation of feed coal, through in advance 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 secondary metallurgical.
Claims (5)
1. production metallurgy Jiao method, it is characterized in that, said method comprising the steps of: 1) by weight, 1/3 coking coal with 78-85%, the long-flame coal of 10-12%, and the hard coal of 5-10% is mixed with the coking mixed coal of ash oontent≤10.0%, sulphur content content≤0.9%, volatile content≤32.0%, caking index 〉=65; 2) produce the GB secondary metallurgical with tamping coking technique.
2. method according to claim 1, is characterized in that, by weight, and described 1/3 coking coal ash oontent 10.3 ~ 10.55%, sulphur content content 0.9 ~ 1.1%, volatile content 29.5 ~ 32.5%, caking index 80 ~ 92; Ash oontent 3.5 ~ 4.3% in described long-flame coal, sulphur content content 0.25 ~ 0.3%, volatile content 37 ~ 40%, caking index are 0; Ash oontent 5.5 ~ 7% in described hard coal, sulphur content content 0.24 ~ 0.29%, volatile content 9 ~ 10%, caking index are 0.
3. method according to claim 2, is characterized in that, in described step 1), preparation comprises: hard coal and long-flame coal are first pulverized separately respectively, 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%.
4. method according to claim 3, 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.
5. method according to claim 4, 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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| 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 |
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| CN102851049A (en) * | 2011-06-27 | 2013-01-02 | 宝山钢铁股份有限公司 | Coal blending method for high-reactivity coke for blast furnace |
| CN103450917B (en) * | 2013-09-05 | 2014-12-17 | 武钢集团昆明钢铁股份有限公司 | Method for modifying and coking mill coal |
| CN103756699B (en) * | 2014-01-07 | 2016-01-20 | 神华集团有限责任公司 | Produce the mixed coal of foundry coke and the production method of foundry coke |
| CN103760105A (en) * | 2014-01-22 | 2014-04-30 | 安徽工业大学 | Measuring method of coal bonding characteristic index under tamping condition |
| CN104327873B (en) * | 2014-09-16 | 2018-08-07 | 北京三聚环保新材料股份有限公司 | A kind of raw material carrying out low-order coal upgrading using existing tamping coke furnace |
| BR112017014186A2 (en) * | 2014-12-31 | 2018-01-09 | Suncoke Tech & Development Llc | coke material multimodal beds |
| CN107267183A (en) * | 2017-06-28 | 2017-10-20 | 徐州市龙山制焦有限公司 | A kind of method of coke making and coal blending |
| CN110746997B (en) * | 2019-10-29 | 2021-03-19 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111621313B (en) * | 2020-06-11 | 2023-06-16 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
| CN111621314B (en) * | 2020-06-11 | 2021-11-02 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
| CN113563913A (en) * | 2021-07-06 | 2021-10-29 | 新疆吉泰低阶煤利用研究有限责任公司 | Preparation method of high-reactivity high-strength coke |
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| CN1537920A (en) * | 2003-10-22 | 2004-10-20 | 郜志成 | Coal for coking prepared from anthracite and coke produced from said coal and production method of said coke |
| CN1648205A (en) * | 2004-12-30 | 2005-08-03 | 武汉钢铁(集团)公司 | Coal blending and coking method for metallurgical coke |
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| 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 |
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