CN101870875A - 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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- CN101870875A CN101870875A CN200910082916A CN200910082916A CN101870875A CN 101870875 A CN101870875 A CN 101870875A CN 200910082916 A CN200910082916 A CN 200910082916A CN 200910082916 A CN200910082916 A CN 200910082916A CN 101870875 A CN101870875 A CN 101870875A
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- 239000003245 coal Substances 0.000 title claims abstract description 163
- 238000004939 coking Methods 0.000 title claims abstract description 115
- 239000000571 coke Substances 0.000 title claims abstract description 43
- 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
- 238000002156 mixing Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 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 description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 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
- 238000002474 experimental method 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
- 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
- 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
- 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 the burnt field of production metallurgy, particularly relate to the method for utilizing 1/3 coking coal and non-coking coal production metallurgy Jiao.
Background technology
Coal resources in China, to height rotten meager coal, hard coal, though great variety of goods, each coal proportion great disparity is very big from low rotten peat, brown coal, and it is very uneven to distribute.Account for 73% at existing proven reserve medium power coal, be applicable to that the coal of coking has only 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%.It is about 50% that the more weak bottle coal of agglutinating value(of coal) accounts for coking coal resource, and strong close-burning rich coal and coking coal be less than 30% then.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 main coal is 1/3 coking coal, meager coal, long-flame coal, hard coal etc.Wherein, main coals such as geographic 1/3 coking coal of Wuhai, refreshing eastern geographic long-flame coal, the geographic hard coal in Ningxia, reserves are bigger.Since the beginning of the sixties in last century, Baogang coking Factory had once carried out great deal of experimental work, but thought that 100% usefulness the Inner Mongol geographic coal of Wuhai is main coal source, the metallurgical coke that adopts top dress technology to produce suitable large blast furnace smelting usefulness is impossible.
As coking production, the final coke quality quality that obtains, its influence factor is a lot, but mainly contains two broad aspect: the one, the proportioning of the ature of coal of feed coal and its various coals, this is primary, also is the most basic influence factor; The 2nd, coke making process and process control condition.Coal based on Inner Mongol Wuhai and surrounding area has coals such as 1/3 coking coal, long-flame coal, hard coal, and it is 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
At above technological deficiency, the object of the invention provides a kind of usefulness 1/3 coking coal and non-coking coal production metallurgy Jiao's processing method, this method is by adding sulphur content and the lower non-coking coal of ash oontent in 1/3 higher coking coal of the abundant sulphur content of local reserves and ash oontent, using tamping coking technique and produce the GB secondary metallurgical.
The invention provides a kind of production metallurgy Jiao's 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) with tamping coking technique production metallurgy Jiao, make that the ash oontent in the 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 Inner Mongol Wuhai and surrounding area reserves 1/3 coking coal than horn of plenty; Non-coking coal is the 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 the 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 the 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 the described hard coal, sulphur content content 0.24～0.29%, volatile content 9～10%, caking index are 0.
Preferably, preparation described in the described step 1) comprises: hard coal and long-flame coal are pulverized separately respectively earlier, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, wherein＜and the particle of 0.5mm accounts for 50%; And then mix with 1/3 coking coal and pulverize, 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 control 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, coking comprises step 2 of the present invention): 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 technology firm by ramming, and it is allocated in the coking coal, and 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 physical strength that the metallurgical coke of refining is up to state standards and the index request of hot performance.In addition, low grey doctor negative non-coking coal is allocated 1/3 coking coal coking into, can reduce the ash content and the sulphur content of metallurgical coke and can reduce that coking coal to avoid the phenomenon of coke pushing difficulty to the swelling pressure of coke oven in the process of coking.Have, anthracitic petrographic constituent can make when charge of coke shrinks in the process of coking and reduce string stress, and the coke crackle is reduced, and improves physical strength, and improves its result again.
Generally speaking, the present invention successfully utilizes 1/3 coking coal and non-coking coal production secondary metallurgical by tamping coking technique; Realize the 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 example, but the present invention is not limited to this.
1, formulates the coal blending scheme
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%.Because ash content and sulphur content are 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 advantages such as special low ash, special low-sulfur, allocates into during coking to help improving the coke oeverall quality in right amount, but should note its broken fineness.
Near the Wuhai of Inner Mongol refreshing mansion is produced long-flame coal and is also had 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 influence the intensity and the wear resistance characteristic of finished product coke, thus influence coke quality, so 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 technology firm by ramming, and it is allocated in the coking coal, and non-coking coal and 1/3 coking coal allocated into 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, low grey doctor negative non-coking coal is allocated 1/3 coking coal coking into, can reduce the ash content and the sulphur content of metallurgical coke and can reduce that coking coal to avoid the phenomenon of coke pushing difficulty to the swelling pressure of coke oven in the process of coking.Have, anthracitic petrographic constituent can make when charge of coke shrinks in the process of coking and reduce string stress, and the coke crackle is reduced, and improves physical strength, and improves its result 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 local and peripheral coal resources to greatest extent, to reduce raw materials cost and the transportation cost that coking is produced, resources advantage is converted into economic advantages.
1.3 the formulation of coal blending scheme
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 influence of non-coking coal STRENGTH ON COKE mechanical property that consideration is joined, according to the analytical results design coal blending scheme of feed coal, above analysis of experiments method therefor all adopts relevant coal and coking industry project detection method standard then.
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 the 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 the 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 influence 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 even non-caking coal, 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 the 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 pulverized separately respectively earlier, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, wherein＜and the particle of 0.5mm accounts for 50%; And then mix with 1/3 coking coal and pulverize, the particle that is crushed to particle diameter≤3mm accounts for more than 85%.The moisture content of control 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, the 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 put-focus machine of scraper plate put-focus, double-deck screen shale shaker adds the individual layer screening, the endless belt conveyor transportation.
3, coking result
With the coke that above coal blending scheme 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 the metallurgical coke quality standard (GB/T1996-2003).
Through above refining process, though 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, then under the prerequisite that satisfies mixed coal requirement index through in advance, take into account economic principle, design coal blending scheme, and technological process according to the rules just can be refined out and met the GB secondary metallurgical.
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≤10.0%, sulphur content content≤0.9%, volatile content≤32.0%, caking index 〉=65 with 1/3 coking coal and non-coking coal; 2) produce the GB secondary metallurgical with tamping coking technique.
2. method according to claim 1 is characterized in that, described 1/3 coking coal accounts for 70～85% of mixed coal gross weight, is preferably 78-85%; Non-coking coal accounts for 15～30% of mixed coal gross weight; Be preferably 15～22%.
3. method according to claim 2 is characterized in that, described non-coking coal is hard coal and long-flame coal.
4. method according to claim 3 is characterized in that, contains in the described coke making and coal blending: by weight, and 1/3 coking coal of 78-85%, the long-flame coal of 10-12% and the hard coal of 5-10%.
5. method according to claim 4 is characterized in that, in mass, 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 the 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 the described hard coal, sulphur content content 0.24～0.29%, volatile content 9～10%, caking index are 0.
6. method according to claim 5 is characterized in that, preparation comprises in the described step 1): hard coal and long-flame coal are pulverized separately respectively earlier, and the particle that is crushed to particle diameter≤1mm accounts for more than 70%, wherein＜and the particle of 0.5mm accounts for 50%; And then mix with 1/3 coking coal and pulverize, 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 control 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN103450917A (en) * | 2013-09-05 | 2013-12-18 | 武钢集团昆明钢铁股份有限公司 | Method for modifying and coking mill coal |
| CN103756699A (en) * | 2014-01-07 | 2014-04-30 | 神华集团有限责任公司 | Blended coal for producing foundry coke and 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 |
| CN104327873A (en) * | 2014-09-16 | 2015-02-04 | 北京三聚环保新材料股份有限公司 | Raw material for increasing quality of low-rank coal by present tamping coke oven |
| 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 |
| CN107406773A (en) * | 2014-12-31 | 2017-11-28 | 太阳焦炭科技和发展有限责任公司 | Multi-modal coking is material bed |
| CN110746997A (en) * | 2019-10-29 | 2020-02-04 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111621313A (en) * | 2020-06-11 | 2020-09-04 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
| CN111621314A (en) * | 2020-06-11 | 2020-09-04 | 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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| 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 |
| CN103450917A (en) * | 2013-09-05 | 2013-12-18 | 武钢集团昆明钢铁股份有限公司 | Method for modifying and coking mill coal |
| 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 |
| CN103756699A (en) * | 2014-01-07 | 2014-04-30 | 神华集团有限责任公司 | Blended coal for producing foundry coke and 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 |
| CN104327873A (en) * | 2014-09-16 | 2015-02-04 | 北京三聚环保新材料股份有限公司 | Raw material for increasing quality of low-rank coal by present tamping coke oven |
| CN107406773A (en) * | 2014-12-31 | 2017-11-28 | 太阳焦炭科技和发展有限责任公司 | Multi-modal coking is material bed |
| 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 |
| CN110746997A (en) * | 2019-10-29 | 2020-02-04 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111621313A (en) * | 2020-06-11 | 2020-09-04 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
| CN111621314A (en) * | 2020-06-11 | 2020-09-04 | 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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