CN101220410B - Negative pressure sintering process for end wind box - Google Patents
Negative pressure sintering process for end wind box Download PDFInfo
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- CN101220410B CN101220410B CN2008100544880A CN200810054488A CN101220410B CN 101220410 B CN101220410 B CN 101220410B CN 2008100544880 A CN2008100544880 A CN 2008100544880A CN 200810054488 A CN200810054488 A CN 200810054488A CN 101220410 B CN101220410 B CN 101220410B
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Abstract
An end bellow negative pressure sintering technique belongs to the sintering technique in metallurgical industry for preparing the ironmaking blast furnace raw material. The invention is realized by the blending process, the material mixing process, the burden distribution process and the sintering process in sequence, which is characterized in that the blending process is blended according to the weight of the raw material. The weight sum of the raw material is considered as 100 percent. The following raw material is blended according to the following ratio: the concentrate powder is 64 percent to 82 percent; the blast furnace return fine is 0 percent to 15 percent; the synthetical powder is 0 percent to 3 percent; the quicklime is 5.5 percent; the dolomite is 8 percent and the coke powder is 4.5 percent. The loaded height of the burden distribution process is 720mm. When in the sintering process, the sintering end-point is adjusted to the position of the end bellow by previously adjusting the speed of the sintering machine. The sinter yield is improved by 1 percent and the powder rate is decreased by 1 percent when the invention is tested in the burning operation area of the Iron-making Plant of Shanxi Taigang Stainless Steel co., Ltd. The invention fully utilizes the sinter effective air volume, thus reducing the energy waste and improving the sinter mineral yield and product quality.
Description
Technical field:
The invention belongs to metallurgy industry and prepare the sintering process of iron-smelting blast furnace raw material.
Background technology:
For a long time, sintering process is the mode of " the low bed of material, fast machine speed, height are joined carbon ", be that fabric thickness is 650 millimeters, the machine speed of sinter machine is 1.2 meters/minute, sintering end point can only be controlled on the penult bellows of sinter machine, effective exhausting area of sinter machine can not utilize fully, causes very big waste.
Summary of the invention:
The present invention aims to provide the negative pressure sintering process for end wind box of " the high bed of material, slow machine speed ".
The realization the technical solution of the utility model is: comprise blending process, the batch mixing process, the cloth process, sintering process, it is characterized in that blending process is for preparing following raw material by weight: fine ore 64～82%, blast furnace returns mine 0～15%, comprehensive powder 0～3%, unslaked lime 5.5%, rhombspar 8%, coke powder 4.5%, described comprehensive meal component is mainly ironmaking, the industrial waste with certain iron grade of output in the steelmaking process, comprise sintering, the dedusting ash that produces in the iron manufacturing process, the iron scale that produces in the rolling process, the waste material that produces in slag and other production process with certain iron grade;
The batch mixing process will be for adding water according to the raw material of aforementioned proportion preparation, and amount of water is 7% of a material gross weight, and the mixed granularity of making that stirs is 3 millimeters～8 millimeters a particle;
The cloth process installs to process on the chassis for making the particulate compound, promptly be arranged on down according to bigger particle, the cloth principle that smaller particles is arranged on, be slipped on the chassis making the scarp of particulate compound along nine roller machines, work loading height is 720 millimeters, flattens compacting with nip rolls;
Sintering process is to fill the chassis of granulation compound, during through ignition furnace, burns by coke-oven gas; generation is up to the high temperature more than 1100 ℃; burned flame is lighted the surface of the compound on the chassis under little suction function of chassis bottom, carries out the production of agglomerate.In the production of agglomerate, the terminal temperature of monitoring sinter machine and the variation tendency of house steward's negative pressure, but analysis and judgement goes out the particular location of sintering end point, by regulating the sinter machine machine speed in advance, sintering end point is adjusted to the position of position, end bellows, the travelling speed that is sinter machine is 1.2 meter per seconds, when sintering end point temperature＞260 ℃, and when sintering end point was positioned at penultimate bellows, house steward's negative pressure was 12.9 ± 0.3kPa, and the sinter machine machine speed is brought up to 1.32 meter per seconds by 1.2 meter per seconds, after 3 minutes, sintering end point will move to the omega-bellows, and position, end bellows negative pressure is controlled at 12.8 ± 0.2kPa, and be best production status this moment;
When sintering end point temperature＜200 ℃, and house steward's negative pressure be＞during 13.2kPa, the sinter machine machine speed slows to 1.06 meter per seconds by 1.2 meter per seconds, after about 4.5 minutes, sintering end point will move to position, end bellows, and position, end bellows negative pressure is controlled at 12.8 ± 0.2kPa, and be best production status this moment.
The present invention burns the working district test at Shanxi Taigang Stainless Steel Co., Ltd's iron work one, and the agglomerate yield rate has improved 1%, and the powder rate has reduced by 1%; The present invention has made full use of the sintering effective wind rate, has reduced energy dissipation, has improved agglomerate output and quality product.
Embodiment:
Embodiment one: present embodiment burns the working district test at Shanxi Taigang Stainless Steel Co., Ltd's iron work one, utilizes an existing installation that burns the working district to implement, and used equipment all is prior aries among the embodiment, is not described in detail.Present embodiment is realized through the following steps:
1, at first with granularity be the rhombspar of 80～90mm, the crushing and screening device through hammer mill and suspended vibration screen banks one-tenth is crushed to 0～3mm with it; With granularity is the coke powder of 40～50mm, is crushed to 0～3mm through four-roller crusher;
2, be homemade fine ore 30% by weight by disk autofeed device then, brassidin breeze 34%, blast furnace return mine 15%, comprehensive powder 3%, and unslaked lime 5.5%, rhombspar 8%, the ratio of coke powder 4.5% is prepared burden;
3, be controlled at 55～65 kilograms by every meter charge hoisting by belt conveyer amount (being charge), send into blending device by conveying belt;
Water valve is opened in blending device material loading operation 50 seconds, is the flow of 3～4 Kilograms Per Seconds by discharge, adds that water is mixed to stir.
Blending device quit work 45 seconds, and what promptly the material tail of proportioning room entered into blending device adds the water stage, and discharge is controlled at 3～4 Kilograms Per Seconds.
After the material in the blending device all empties, stop to supply water.
4, the cloth process is: existing nip rolls armshaft is promoted 70mm, reserve the space, in the production control process,, be arranged on down according to bigger particle by improving mud roller rotating speed, the cloth principle that smaller particles is arranged on, be slipped on the chassis making the scarp of particulate compound along nine roller machines, work loading height is 720 millimeters, flattens compacting with nip rolls, the partially mixed material of avoiding exceeding the chassis baffle plate spills from chassis baffle plate two ends stream, enters the sintering process of sinter machine at last.
5, sintering process is to fill the chassis of granulation compound, during through ignition furnace, burns by coke-oven gas; generation is up to the high temperature more than 1100 ℃; burned flame is lighted the surface of the compound on the chassis under little suction function of chassis bottom, carries out the production of agglomerate.In the production of agglomerate, the terminal temperature of monitoring sinter machine and the variation tendency of house steward's negative pressure, but analysis and judgement goes out the particular location of sintering end point, by the machine speed of control sinter machine, sintering end point is controlled at position, end bellows.
18 bellows are set in the present embodiment, the travelling speed of sinter machine is 1.2 meter per seconds, when sintering end point temperature＞260 ℃, and when sintering end point was positioned at penultimate 17# bellows, house steward's negative pressure was 12.9 ± 0.3kPa, and the sinter machine machine speed is by 1.2 meter per seconds, should improve 0.12 meter per second, after 3 minutes, sintering end point will move to 18# bellows last, and it is best production status that 18# bellows negative pressure is controlled at 12.8 ± 0.2kPa.When sintering end point temperature＜200 ℃, and house steward's negative pressure be＞during 13.2kPa, the sinter machine machine speed is by 1.2 meter per seconds, 0.14 meter per second should slow down, 4.5 after minute, sintering end point will move to 18# bellows last, it is best production status that 18# bellows negative pressure is controlled at 12.8 ± 0.2kPa.
Embodiment two: the part inequality of present embodiment and embodiment one is a step 2, be homemade fine ore 30% by weight promptly by disk autofeed device, India's fine ore 34%, blast furnace returns mine 15%, comprehensive powder 3%, unslaked lime 5.5%, rhombspar 8%, coke powder 4.5%, other step and technology are identical with embodiment one.
Embodiment three: the part inequality of present embodiment and embodiment one is a step 2, is homemade fine ore 82% by weight by disk autofeed device promptly, unslaked lime 5.5%, and rhombspar 8%, coke powder 4.5%, other step and technology are identical with embodiment one.
Embodiment four: the part inequality of present embodiment and embodiment one is a step 2, is homemade fine ore 48% by weight by disk autofeed device promptly, India's fine ore 34%, unslaked lime 5.5%, rhombspar 8%, coke powder 4.5%, other step and technology are identical with embodiment one.
Embodiment five: the part inequality of present embodiment and embodiment one is a step 2, is homemade fine ore 48% by weight by disk autofeed device promptly, brassidin breeze 34%, unslaked lime 5.5%, rhombspar 8%, coke powder 4.5%, other step and technology are identical with embodiment one.
Illustrate:
1, the blast furnace in the various embodiments described above is returned mine and is the agglomerate of particle less than 5 millimeters, does not promptly meet the agglomerate of blast furnace ironmaking raw material.
2, the comprehensive meal component in the various embodiments described above is mainly the industrial waste with certain iron grade of output in ironmaking, the steelmaking process, comprise the dedusting ash that produces in sintering, the iron manufacturing process, the waste material that produces in the iron scale that produces in the rolling process, slag and other production process with certain iron grade.Comprehensive powder proportioning generally is no more than 3%, and its composition is more assorted, and instability belongs to a kind of mode of utilization of waste material in the SINTERING PRODUCTION.
3, fine ore can divide home-made and import, according to the requirement of producing different steel, adopt the ratio difference of the fine ore in the different places of production, but the overall proportion of fine ore is in 64～82% scopes.
4, used equipment is existing installation in the iron work among the present invention.
Claims (2)
1. negative pressure sintering process for end wind box, pass through blending process successively, the batch mixing process, the cloth process, sintering process realizes, it is characterized in that blending process is to prepare burden by the weight of raw material, the summation of raw material weight is regarded as 100%, prepare following raw material by following proportioning: fine ore 64～82%, blast furnace returns mine 0～15%, comprehensive powder 0～3%, unslaked lime 5.5%, rhombspar 8%, coke powder 4.5%, described comprehensive meal component is mainly ironmaking, the industrial waste with certain iron grade of output in the steelmaking process, comprise sintering, the dedusting ash that produces in the iron manufacturing process, the iron scale that produces in the rolling process, the waste material that produces in slag and other production process with certain iron grade; In the sintering process, regulate the sinter machine machine speed in advance, sintering end point is adjusted to the position of position, end bellows, the travelling speed that is sinter machine is 1.2 meter per seconds, when sintering end point temperature＞260 ℃, and when sintering end point is positioned at penultimate bellows, house steward's negative pressure is 12.9 ± 0.3kPa, and the sinter machine machine speed is brought up to 1.32 meter per seconds by 1.2 meter per seconds, after 3 minutes, sintering end point will move to the omega-bellows, position, end bellows negative pressure is controlled at 12.8 ± 0.2kPa, regulates the sinter machine machine speed in advance, sintering end point is adjusted to the position of position, end bellows, promptly when sintering end point temperature＜200 ℃, and house steward's negative pressure is＞during 13.2kPa, the sinter machine machine speed slows to 1.06 meter per seconds by 1.2 meter per seconds, after 4.5 minutes, sintering end point will move to position, end bellows, and position, end bellows negative pressure is controlled at 12.8 ± 0.2kPa.
2. negative pressure sintering process for end wind box according to claim 1, it is characterized in that the cloth process installs to process on the chassis for making the particulate compound, promptly be arranged on down according to bigger particle, the cloth principle that smaller particles is arranged on, be slipped on the chassis making the scarp of particulate compound along nine roller machines, work loading height is 720 millimeters, flattens compacting with nip rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100544880A CN101220410B (en) | 2008-01-23 | 2008-01-23 | Negative pressure sintering process for end wind box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100544880A CN101220410B (en) | 2008-01-23 | 2008-01-23 | Negative pressure sintering process for end wind box |
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| CN101220410A CN101220410A (en) | 2008-07-16 |
| CN101220410B true CN101220410B (en) | 2010-06-02 |
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| CN2008100544880A Expired - Fee Related CN101220410B (en) | 2008-01-23 | 2008-01-23 | Negative pressure sintering process for end wind box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103033052A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
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| CN103233115B (en) * | 2013-05-16 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Method for preparing agglomerate employing iron concentrate powder as primary iron charge |
| CN103820635A (en) * | 2014-02-15 | 2014-05-28 | 邹明 | Endless sintering process |
| CN103836645A (en) * | 2014-03-20 | 2014-06-04 | 莱芜钢铁集团有限公司 | Sintering ignition method with low gas unit consumption |
| CN109292856B (en) * | 2018-11-06 | 2023-11-21 | 杭州沁欣环保科技有限公司 | Device and method for treating coking wastewater by utilizing sintering |
| CN109439893A (en) * | 2018-11-20 | 2019-03-08 | 广东广青金属科技有限公司 | Stainless steel slag blast furnace sinter method |
| CN115491488B (en) * | 2022-09-21 | 2023-07-18 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazil mixed powder, sintering composition, sintered ore and preparation method of iron-containing material |
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| CN1276436A (en) * | 2000-06-14 | 2000-12-13 | 莱芜钢铁股份有限公司烧结厂 | Process and equipment for preparing sintered ore |
| CN101063182A (en) * | 2007-04-06 | 2007-10-31 | 深圳市中金岭南有色金属股份有限公司韶关冶炼厂 | Heavy-duty material inlay sintering process production technique |
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Cited By (2)
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| CN103033052A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
| CN103033052B (en) * | 2012-12-27 | 2014-09-03 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
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Granted publication date: 20100602 Termination date: 20170123 |