CN102191071A - Modification treatment method for weak caking coal or non-caking coal - Google Patents
Modification treatment method for weak caking coal or non-caking coal Download PDFInfo
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- CN102191071A CN102191071A CN2011100794178A CN201110079417A CN102191071A CN 102191071 A CN102191071 A CN 102191071A CN 2011100794178 A CN2011100794178 A CN 2011100794178A CN 201110079417 A CN201110079417 A CN 201110079417A CN 102191071 A CN102191071 A CN 102191071A
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Abstract
The invention provides a modification treatment method utilizing steam for weak caking coal or non-caking coal, which are represented by Shenfu coal and with a low metamorphic grade and a high volatile matter content. According to the method, the Shenfu coal is treated with steam and modified in a fixed bed reactor under proper conditions, so that the modified Shenfu coal can be used in coal blending for coking. After modification, the amount of the Shenfu coal used in coal blending for coking can be raised to 8-15% to replace gas coal, on the premise of satisfying coke quality, so as to substantially reduce coal blending coking costs, stabilize and enlarge coking coal resources, and expand usage approaches of weak caking coal or non-caking coal with a low metamorphic grade and a high volatile matter content.
Description
Technical field
The invention belongs to the upgrading processing technology field of weakly caking or non caking coal, be specifically related to agglutinating value(of coal) and coking behavior by glutinous a little less than the improvement of steam-treated upgrading means or non caking coal.
Background technology
The present situation of present coal resources in China, be to be becoming tight high-quality caking coal resource day, and the non-caking coal of low metamorphic grade high-volatile such as shenfu coal reserves are abundant, and these weak uses glutinous or non caking coal can enlarge the resource of coking coal to greatest extent, alleviate the deficiency of coking coal.Yet weak glutinous or non caking coal is because its metamorphic grade is lower, oxygen-containing functional group is many, hydrogen bond association intensity height, bond performance is poor, volatile content is higher, thereby directly uses the amount of allocating into to be restricted, and must carry out the upgrading upgrading for this reason and handle, improving its amount of allocating into, and satisfy the requirement of big blast furnace STRENGTH ON COKE quality.
Finding that by Literature Consult the means of the employing hydrothermal treatment consists of bibliographical information are carried out upgrading to coal, all is for improving its liquefaction performance, and its hydrothermal treatment consists process is to adopt liquid water, carries out under the highly compressed effect.And the weakly caking coal of low metamorphic grade is handled means by the water vapor normal pressure, and improve its bond performance, be used for coke making and coal blending and have not yet to see report.
Summary of the invention
The present invention overcomes the prior art deficiency, the method that provides a kind of water vapor normal pressure upgrading to handle the weak glutinous or non caking coal of high-volatile, and the weak glutinous or non caking coal after upgrading handled is used for coke making and coal blending.
The technical scheme that realizes the foregoing invention purpose is: weakly caking coal or non caking coal are placed fixed-bed reactor, feed N
2To drain the air in the reactor, avoid the oxidation of coal sample; Switch the feeding water vapor afterwards, and reactor is begun heating, the pressure of reactor is normal pressure, and hydrothermal treatment consists is carried out under 100～350 ℃, continues to feed water vapor under this temperature; Reach weakly caking coal or non caking coal quality 1～3 times when the consumption of water vapor after, stop heating and switch nitrogen fast with reactor cooling to room temperature; Coal sample from reactor after the taking-up steam-treated, sealed storage is standby as coke making and coal blending; Gas after the processing of overflowing from reactor top can enter coal gas system and be handled after the condensation cooling.
The present invention is directed to the concrete characteristics of the weak sticking or non caking coal of high-volatile, be that metamorphic grade is low, oxygen-containing functional group is many, hydrogen bond association intensity height, bond performance is poor, by the steam-treated under the felicity condition, can its oxygen-containing functional group of effective elimination, reach the purpose of artificial its metamorphic grade of promotion, destroy its hydrogen bond action, improve the content of its organic solvent solvend, thereby improve its agglutinating value(of coal) and coking performance, reaching increases its amount of allocating in coking coal, efficient to greatest extent, rationally use the purpose of weak glutinous or non caking coal resource.
Shenfu coal is typical case's representative of weakly caking coal or non caking coal, because the basic characteristics of its high volatile volatile and weakly caking, make it seldom use on coal-blending coking at present, its amount of allocating in coke making and coal blending was no more than 1～3% when the minority coking enterprise used, and consumption is restricted.After using the technology of the present invention,, can obviously improve the agglutinating value(of coal) and the coking property of shenfu coal, thereby its consumption in coke making and coal blending can be increased to 8～15%, and coke quality can meet the demands through after the suitable steam-treated.
Along with the continuous development of China's coking industry, the contradiction of coking coal resource shortage becomes increasingly conspicuous, and therefore enlarges the application of weakly caking coal in process of coking, improves coke quality, is one of main direction of China's coking industry development.Advantages such as corresponding with it, China's high volatile component weak stickiness or non caking coal resource are very abundant, and wherein long-flame coal, non caking coal and weakly caking coal account for 25% of national coal reserves, and these coals have possessed low-sulfur, easily washing, cleans ash is low and inexpensive.If can improve the adapted amount of these high volatile component weak agglutinating value(of coal)es or non caking coal in the coke making and coal blending, this will help reducing coke ash, sulfur undoubtedly, enlarge coking coal resource, reduce coal blending cost, improve economic and social benefit.The present invention shows, is the weakly caking coal or the non caking coal of representative to shenfu coal, adopts the technology of steam-treated, can obviously improve its agglutinating value(of coal) and coking property really, and it is feasible enlarging its application in coke making and coal blending.The present coking enterprise of related treatment condition can be implemented fully.2010 China's coking coal (cleaned coal) usage quantity reach 500,000,000 t, if be 10%, then can save coking coal 5,000 ten thousand t, thereby can reduce the cost of coke making and coal blending according to the amount of allocating into of shenfu coal behind the steam-treated upgrading, its economic benefit is fairly obvious.
Embodiment
Below in conjunction with embodiment in detail the present invention is described in detail.
Embodiment 1
With the shenfu coal is example, and test is carried out steam-treated to shenfu coal under 100 ℃ condition, and water vapor feeding amount is 2 times of coal sample quality, and adopting the granularity of coal sample is below the 3mm.Improve 65% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 60%, and oxygen level reduces by 4.5%.(crucible coke) gained coke is compared the micro-intensity raising 3.1% of coke, CO with the basic proportioning of raw coal behind water distribution thermal treatment coal coking
2Reactive CRI reduces by 2.5%, and post-reaction strength CRS improves 8.9%.
Embodiment 2
With the shenfu coal is example, and test is carried out steam-treated to shenfu coal under 250 ℃ condition, and water vapor feeding amount is 2 times of coal sample quality, and adopting the granularity of coal sample is below the 3mm.Improve 150% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 160%, and oxygen level reduces by 8.5%.(crucible coke) gained coke is compared the micro-intensity raising 6.1% of coke, CO with the basic proportioning of raw coal behind water distribution thermal treatment coal coking
2Reactive CRI reduces by 12.5%, and post-reaction strength CRS improves 28.9%.
Embodiment 3
With the shenfu coal is example, and test is carried out steam-treated to shenfu coal under 100 ℃ condition, and water vapor feeding amount is 1 times of coal sample quality, and adopting the granularity of coal sample is below the 3mm.Improve 26% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 40%, and oxygen level reduces by 3.5%.(crucible coke) gained coke is compared the micro-intensity raising 2.1% of coke, CO with the basic proportioning of raw coal behind water distribution thermal treatment coal coking
2Reactive CRI reduces by 2.0%, and post-reaction strength CRS improves 6.9%.
Embodiment 4
With the shenfu coal is example, and test is carried out steam-treated to shenfu coal under 350 ℃ condition, and water vapor feeding amount is 2 times of coal sample quality, and adopting the granularity of coal sample is below the 3mm.Improve 85% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 10%, and oxygen level reduces by 6.5%.(crucible coke) gained coke is compared the micro-intensity raising 1.8% of coke, CO with the basic proportioning of raw coal behind water distribution thermal treatment coal coking
2Reactive CRI reduces by 1.8%, and post-reaction strength CRS improves 5.9%.
Embodiment 5
With the shenfu coal is example, and test is carried out steam-treated to shenfu coal under 350 ℃ condition, and water vapor feeding amount is 3 times of coal sample quality, and adopting the granularity of coal sample is below the 3mm.Improve 96% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 16%, and oxygen level reduces by 7.5%.(crucible coke) gained coke is compared the micro-intensity raising 3.8% of coke, CO with the basic proportioning of raw coal behind water distribution thermal treatment coal coking
2Reactive CRI reduces by 2.8%, and post-reaction strength CRS improves 7.9%.
By the steam-treated of embodiment shenfu coal as can be seen, 100～350 ℃ of steam-treated temperature, under the condition of granularity less than 3mm, improve 26～150% through the extract content of the shenfu coal after the steam-treated in N-methyl-2 pyrrolidone/dithiocarbonic anhydride mixed solvent (1: 1 volume ratio), agglutinating value(of coal) index G value improves 10～160%, and oxygen level reduces by 3.5～8.5%.(crucible coke) gained coke is compared with the basic proportioning of raw coal behind the steam-treated coal coking, and the micro-intensity of coke improves 1.8～6.1%, CO
2Reactive CRI reduces by 1.8～12.5%, and post-reaction strength CRS improves 5.9～28.9%.
Claims (3)
1. the method handled of weakly caking coal or non caking coal upgrading is characterized in that said method comprising the steps of:
(1) weakly caking coal or non caking coal are placed fixed-bed reactor, feed N
2To drain the air in the reactor;
(2) switch afterwards to reactor feeding water vapor, and reactor is begun heating, the pressure of reactor is normal pressure, and hydrothermal treatment consists is carried out under 100～350 ℃, continues to feed water vapor under this temperature;
(3) after the consumption of water vapor reaches weakly caking coal or non caking coal quality 1～3 times, stop heating and switch nitrogen fast with reactor cooling to room temperature;
(4) weakly caking coal or the non caking coal after the taking-up steam-treated from reactor, sealed storage is as coke making and coal blending.
2. the method that weakly caking coal according to claim 1 or non caking coal upgrading are handled is characterized in that described weakly caking coal or non caking coal granularity are below 3mm.
3. the method that weakly caking coal according to claim 2 or non caking coal upgrading are handled is characterized in that described hydrothermal treatment consists temperature is 250 ℃, and the water vapor consumption is weakly caking coal or non caking coal quality 2 times.
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| CN2011100794178A CN102191071B (en) | 2011-03-28 | 2011-03-28 | Modification treatment method for weak caking coal or non-caking coal |
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| CN2011100794178A CN102191071B (en) | 2011-03-28 | 2011-03-28 | Modification treatment method for weak caking coal or non-caking coal |
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| CN102191071A true CN102191071A (en) | 2011-09-21 |
| CN102191071B CN102191071B (en) | 2013-12-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517061A (en) * | 2011-12-03 | 2012-06-27 | 莱芜钢铁集团有限公司 | Equipment for treating non-sticky coal and coking method for treating non-sticky coal |
| CN103740391A (en) * | 2013-12-10 | 2014-04-23 | 宝钢集团新疆八一钢铁有限公司 | Method of coal blending for coking by steam coal pretreatment |
| CN104946284A (en) * | 2014-03-31 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Coke of blended pretreated low-order non-sticking bituminous coal and coking method |
| CN104946285A (en) * | 2014-03-31 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Coke blended with bituminous coal and coking method |
-
2011
- 2011-03-28 CN CN2011100794178A patent/CN102191071B/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| R. A. GRAFF 等: "Modification of Coal by Subcritical Steam: Pyrolysis and Extraction Yields", 《ENERGY FUELS》 * |
| 水恒福 等: "水热处理对神华煤液化性能的影响", 《燃料化学学报》 * |
| 王知彩 等: "水热处理对神华煤质的影响", 《燃料化学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517061A (en) * | 2011-12-03 | 2012-06-27 | 莱芜钢铁集团有限公司 | Equipment for treating non-sticky coal and coking method for treating non-sticky coal |
| CN103740391A (en) * | 2013-12-10 | 2014-04-23 | 宝钢集团新疆八一钢铁有限公司 | Method of coal blending for coking by steam coal pretreatment |
| CN104946284A (en) * | 2014-03-31 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Coke of blended pretreated low-order non-sticking bituminous coal and coking method |
| CN104946285A (en) * | 2014-03-31 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Coke blended with bituminous coal and coking method |
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| CN102191071B (en) | 2013-12-11 |
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