CN103160686B - Proportioning method of solid fuel for sintering - Google Patents
Proportioning method of solid fuel for sintering Download PDFInfo
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- CN103160686B CN103160686B CN201110417358.0A CN201110417358A CN103160686B CN 103160686 B CN103160686 B CN 103160686B CN 201110417358 A CN201110417358 A CN 201110417358A CN 103160686 B CN103160686 B CN 103160686B
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- coke
- powder
- sintering
- coal dust
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- 238000005245 sintering Methods 0.000 title claims abstract description 30
- 239000004449 solid propellant Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000571 coke Substances 0.000 claims description 35
- 239000002817 coal dust Substances 0.000 claims description 26
- 238000009826 distribution Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 16
- 239000003245 coal Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 8
- 239000002006 petroleum coke Substances 0.000 abstract description 7
- 238000000227 grinding Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000009257 reactivity Effects 0.000 abstract description 3
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 4
- 239000003830 anthracite Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010024769 Local reaction Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a blending method of solid fuel for sintering, which adopts petroleum coke and coke powder or coal powder as solid fuel and comprises the following components in percentage by mass: 25 to 55 percent of petroleum coke and 75 to 45 percent of coke powder or coal powder, wherein the proportion of the particle size less than 3mm in the coke powder or coal powder is 70 to 40 percent. The invention fully utilizes the characteristic of fine granularity and high reactivity of the petroleum coke, mixes the petroleum coke with a certain proportion into the coke powder or the coal powder, and simultaneously reduces the proportion of the fraction smaller than 3mm in the coke powder and the coal powder, thereby neutralizing the high reactivity of the petroleum coke, reducing the time and the cost for finely grinding fuel, and simultaneously improving the quality of sintered ore.
Description
Technical field
The invention belongs to iron-smelting raw material production technical field, relate to the production technology of agglomerate, particularly a kind of distribution reducing sintering solid fuel coke powder or coal dust < 3mm grade proportion.
Background technology
Existing agglomerate production process is: by ready fine iron breeze, rich ore powder, blast furnace dirt, roll scale and Wingdale, rhombspar and coke powder or pulverized anthracite, delivers to mixing machine carry out mixing and granulating in the ratio calculated after coordinating; Mixed material is taped against on chassis by distributor and carries out igniting sintering.Burned agglomerate is broken through tail single roll crusher, then send cooler to cool after screening.Cooled finished product agglomerate is sent to blast furnace.And to sinter solid fuel used be coke powder or hard coal, it enters factory's fuel granularity and is generally 0mm ~ 25mm, but sintering process is that 0 ~ 3mm should account for more than 85% to its granularity requirements.Paper " Handan Iron and Steel Co is optimized the analysis of fuel grade and put into practice " analyzes fuel granularity to the effect of SINTERING PRODUCTION and the 3 kinds of principal elements affecting the optimization of fuel grade thereof, and summing up fuel granularity must at 0 ~ 3mm, and qualification rate must control more than 85%.Wherein require that 0 ~ 1mm and 1 ~ 2mm grain size content are to reach 34% for good, 2 ~ 3mm content should more than 17%.Because fuel coarsness proportion is large, makes combustion reactions slack-off, can not react synchronous with the mineralising in sintering process, amount of liquid phase in sintering process will be caused to reduce, sinter quality is declined.Therefore need to carry out fragmentation to fuel before SINTERING PRODUCTION, what namely require < 3mm grade in coke powder or coal dust should account for more than 85%, could meet the needs of SINTERING PRODUCTION, thus make the production process time long, and the cost of fine grinding fuel increases.
Refinery coke is the byproduct of refinery, and granularity is very thin, is less than 0.25mm part and almost accounts for 60%, and have reactive high feature.The ash content of refinery coke is very low, be no more than 1.0%, and coke powder ash content is about 13%, and coal powder fraction is 5% ~ 13%.Refinery coke was used as conventional fuel and burnt in the past, and reasonable employment degree is unsatisfactory, and use in sintering at present refinery coke for fuel also little.Paper " Ji steel 120m
2sinter machine is with addition of the commerical test of refinery coke " anthracite fines that uses refinery coke to substitute 50% makes sintering fuel.In this paper, just refinery coke be instead of anthracite fines simply makes sintering fuel, and its anthracite fines used is still and accounts for more than 85% by the < 3mm grade of requirement usually.This refinery coke substitutes coke powder or coal dust simply, also exist because refinery coke reactivity is high, in the sinter bed that combustion reactions is greater than mineralising reaction and causes, local reaction is too fast, cause phenomenon of locally superfusing, the reductibility of agglomerate is declined, and combustion reactions is too fast is unfavorable for bed of material accumulation of heat, amount of liquid phase skewness, sinter quality is declined and causes energy dissipation.
Summary of the invention
The object of the invention is to the deficiency overcoming the existence of above-mentioned prior art, there is provided one with addition of a certain proportion of refinery coke in solid fuel, and reduce the solid-fuelled distribution of sintering of < 3mm grade proportion in coke powder or coal dust.
The present invention is achieved in that solid fuel that the solid-fuelled distribution of this sintering adopts is refinery coke and coke powder or coal dust, its mass percentage is: refinery coke 25% ~ 55%, coke powder or coal dust 75% ~ 45%, and wherein in coke powder or coal dust, the grade proportion of < 3mm is 70% ~ 40%.When Petroleum coke proportion lower than 25% time, the hyperergy effect of refinery coke is not obvious, very little on the impact of SINTERING PRODUCTION; And Petroleum coke proportion higher than 55% time, due to refinery coke dosage too senior general cause speed of response too fast, unfavorable to SINTERING PRODUCTION on the contrary.So the scope of refinery coke is designed to 25% ~ 55% by the present invention.
The content > 85% of fixed carbon in refinery coke described in the solid-fuelled distribution of sintering of the present invention; Described refinery coke proportion is higher, and in side coke powder or coal dust, the grade proportion of < 3mm is lower.
The present invention makes full use of the thin reactive high feature of coke grain, a certain proportion of refinery coke is allocated in coke powder or coal dust, and reduce < 3mm grade proportion in coke powder and coal dust simultaneously, both the hyperergy of refinery coke had been neutralized, make refinery coke and coke powder or coal dust in sintering process, react more abundant, sintering accumulation of heat is more abundant, again reduce fine grinding fuel time and cost, also improve sinter quality simultaneously, thus provide good method for effective application of refinery coke in SINTERING PRODUCTION.
Embodiment
Below by embodiment, the present invention is further illustrated.
The present invention is when iron charge proportioning is consistent, and carried out eight groups of experiments, coal dust, coke powder, refinery coke are mass percentage.Experiment iron charge proportioning is in table 1, and sintering experiment the results are shown in Table 2.
Comparative example 1, adopts 100% conventional pulverized-coal (in coal dust, < 3mm ratio is greater than 85%);
Comparative example 2, adopts 100% conventional coke powder (in coke powder, < 3mm ratio is greater than 85%);
Embodiment 1,75% coal dust (in coal dust < 3mm ratio 70%) is with addition of 25% refinery coke;
Embodiment 2,75% coke powder (in coke powder < 3mm ratio 70%) is with addition of 25% refinery coke;
Embodiment 3,60% coal dust (in coal dust < 3mm ratio 55%) is with addition of 40% refinery coke;
Embodiment 4,60% coke powder (in coke powder < 3mm ratio 55%) is with addition of 40% refinery coke;
Embodiment 5,45% coal dust (in coal dust < 3mm ratio 40%) is with addition of 55% refinery coke;
Embodiment 6,45% coke powder (in coke powder < 3mm ratio 40%) is with addition of 55% refinery coke.
Table 1 iron charge proportioning/%
Table 2 sintering experiment result
From sintering experiment result, with comparative example 1 with 2 normal sintering fuel compare, from embodiment 1 to embodiment 6, allocate the refinery coke of 25%, 40%, 55% respectively into, simultaneously corresponding ratio in coke powder and coal dust shared by < 3mm grade is reduced to 70%, 55%, 40% respectively, sinter quality progressively improves, cold strength improves, yield rate improves, and powder reduces, and sintering burnup declines.Experiment proves in sintering fuel coke powder or coal dust, allocate a certain proportion of refinery coke into, and to reduce < 3mm grade proportion in coke powder or coal dust be feasible simultaneously, and can improve sinter quality, and reduce SINTERING PRODUCTION energy consumption.
Claims (1)
1. the solid-fuelled distribution of sintering, it is characterized in that adopted solid fuel is refinery coke and coke powder or coal dust, its mass percentage is: refinery coke 25% ~ 40%, coke powder or coal dust 75% ~ 60%, and wherein in coke powder or coal dust, the grade proportion of <3mm is 70% ~ 40%; The content >85% of fixed carbon in described refinery coke, described refinery coke proportion is higher, then in coke powder or coal dust, the grade proportion of < 3mm is lower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110417358.0A CN103160686B (en) | 2011-12-14 | 2011-12-14 | Proportioning method of solid fuel for sintering |
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| CN201110417358.0A CN103160686B (en) | 2011-12-14 | 2011-12-14 | Proportioning method of solid fuel for sintering |
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| CN103160686B true CN103160686B (en) | 2015-06-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441151B (en) * | 2014-08-21 | 2018-01-12 | 陆锦崇 | It is a kind of instead of diesel oil, coal, natural gas solid-state environmental protection compound carbon powder |
| CN109161421A (en) * | 2018-10-29 | 2019-01-08 | 包头钢铁（集团）有限责任公司 | A kind of solid fuel for producing sinter and using |
| CN113930558B (en) * | 2021-09-29 | 2023-01-10 | 武汉钢铁有限公司 | Method for effectively determining proportion of waste activated carbon powder replacing sintered fuel |
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2011
- 2011-12-14 CN CN201110417358.0A patent/CN103160686B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 以石油焦作为烧结生产的主要燃料;T. F. Kowalczyk等;《武钢技术》;19900302;表2试样的重量损失和温度的关系 * |
| 济钢120m2烧结机配加石油焦的工业试验;潘鹤等;《山东冶金》;20100820;第32卷(第4期);2工业试验 * |
| 焦粉粒度对铁矿石烧结过程的影响;欧大明等;《钢铁》;20081031;第43卷(第10期);摘要，4结语 * |
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