CN102002549A - Dry deslagging method of soaking pit - Google Patents
Dry deslagging method of soaking pit Download PDFInfo
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- CN102002549A CN102002549A CN 201010577624 CN201010577624A CN102002549A CN 102002549 A CN102002549 A CN 102002549A CN 201010577624 CN201010577624 CN 201010577624 CN 201010577624 A CN201010577624 A CN 201010577624A CN 102002549 A CN102002549 A CN 102002549A
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- soaking pit
- serpentine
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- slag
- tapping
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Abstract
The invention relates to a dry deslagging method of a soaking pit, belonging to the steelmaking field. The dry deslagging method of the soaking pit is characterized by comprising the steps of: evenly laying a serpentine isolated layer with a thickness of 180-250mm on the bottom of the soaking pit, wherein the content of MgO of the serpentine is 35-50%, the content of SiO2 is 37-42%, the content of Sigma Fe is less than or equal to 10%, the content of CaO is less than 1%, the loss on ignition is 0.5-6%, the refractoriness is 1520 DEG C, the compression strength is 2.0-3.0mpa, the volume density is 2.35-2.42g/cm<3>, and the particle size is 40-70mm; evenly stirring the steel slag and the serpentine for 10 minutes per tapping of 12-15 heat; and deslagging for 30-50 minutes per tapping of 30-35 heat. The dry deslagging method of the soaking pit can shorten the steel-free empty burn heating high-temperature time, enhance the turnover rate of the soaking pit, and lower the consumption of gas.
Description
Technical field:
The invention belongs to field of steel-making, be specifically related to a kind of soaking pit and do the slag method.
Background technology:
At present, the mode of slagging tap of soaking pit adopts liquid to slag tap, i.e. after soaking pit tapping finished, empty stove temperature raising 1 hour to 1450 ℃ was incubated one and a half hours, scrapes slag half an hour, and always the time of slagging tap is 3 hours.This mode gas consumption of slagging tap is bigger, and energy dissipation is serious, and furnace campaign shortens, the pollution of environment, and staff's labour intensity is big.
Summary of the invention:
The present invention aims to provide save energy, and a kind of soaking pit simple to operate is done the slag method.Go out slag operation by the soaking crab crane instrument of slagging tap of slinging that collapses, finish the whole technology of slagging tap.
A kind of soaking pit is done the slag method, it is characterized in that at the even laying depth of furnace bottom be 180-250mm serpentine sealing coat, and the MgO content of serpentine is 35-50%, SiO
2Content is 37-42%, ∑ Fe≤10%, and CaO content＜1%, igloss is 0.5-6%, and refractoriness is 1520 ℃, and compressive strength is 2.0-3.0mpa, and volume density is 2.35-2.42g/cm
3, granularity is 40-70mm; Every tapping 12-15 stove carries out 10 minutes even stirring to slag and serpentine; Slag tap behind every tapping 30-35 stove, the time of slagging tap is 30-50 minute.
The empty stove of the present invention does not need temperature raising, stirs once every 6 days, needs ten minutes at every turn, does slag (because of the working of a furnace is decided) after every soaking pit stirred five times in every month.The present invention can shorten empty burning of no steel and heat high-temperature time, raising stove turnover rate, and reduces gas consumption.Utilize the no steel sky of saving to burn heat-up time, can correspondingly increase soaking pit output, reduce tapping temperature, reduce thermopair damage, improve stove refractory materials behaviour in service, avoid peeling off of furnace wall refractory concrete, furnace campaign is prolonged, and reduced stocking unit operation ton steel energy consumption index, reduced generation and the discharging of carbon monoxide, oxynitride simultaneously, reduced and pollute.
The economical, societal benefits of its creation are at current price calculated:
Every hole is annual saves heat-up time: 144 hours; The annual coal gas of saving in every hole: 10.28 ten thousand yuan; The annual serpentine cost that adopts in every hole: 3.456 ten thousand; Can reduce expenses every year in every hole: 6.824 ten thousand yuan; If all be used for producing in 144 hours of 1 soaking pit saving, every stove burns the steel time and calculated by six hours, and soaking pit can have more steel: 1440 tons in 24 stoves; Can increase production wound imitates: 48.96 ten thousand yuan.
Compare with the liquid technology of slagging tap, do every annual total creation of value of stove behind the slag: 55.784 ten thousand yuan.
Embodiment:
Embodiment: 1, the even laying depth of furnace bottom is a 180-250mm serpentine sealing coat, and attention will prevent that furnace bottom shop sealing coat from leaking the shop phenomenon.
2, every tapping 12-15 stove carries out stirring about 10 minutes to slag and serpentine, need stir loosening furnace bottom slag.
3, slag tap behind every tapping 30-35 stove.When slagging tap, empty stove does not need temperature raising, and the time of slagging tap is 30-50 minute.
The MgO content of described serpentine is 35-50%, SiO
2Content is 37-42%, ∑ Fe≤10%, and CaO content＜1%, igloss is 0.5-6%, and refractoriness is 1520 ℃, and compressive strength is 2.0-3.0mpa, and volume density is 2.35-2.42g/cm
3, granularity is 40-70mm.
Claims (1)
1. a soaking pit is done the slag method, it is characterized in that at the even laying depth of furnace bottom be 180-250mm serpentine sealing coat, and the MgO content of serpentine is 35-50%, SiO
2Content is 37-42%, ∑ Fe≤10, and CaO content＜1%, igloss is 0.5-6%, and refractoriness is 1520 ℃, and compressive strength is 2.0-3.0mpa, and volume density is 2.35-2.42g/cm
3, granularity is 40-70mm; Every tapping 12-15 stove carries out 10 minutes even stirring to slag and serpentine; Slag tap behind every tapping 30-35 stove, the time of slagging tap is 30-50 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010577624 CN102002549A (en) | 2010-12-04 | 2010-12-04 | Dry deslagging method of soaking pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010577624 CN102002549A (en) | 2010-12-04 | 2010-12-04 | Dry deslagging method of soaking pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102002549A true CN102002549A (en) | 2011-04-06 |
Family
ID=43810251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010577624 Pending CN102002549A (en) | 2010-12-04 | 2010-12-04 | Dry deslagging method of soaking pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102002549A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI510636B (en) * | 2012-09-24 | 2015-12-01 | China Steel Corp | An open sand for steelmaking electric arc furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4379691A (en) * | 1981-10-13 | 1983-04-12 | International Minerals & Chemical Corp. | Olivine bedding material for soaking pits |
-
2010
- 2010-12-04 CN CN 201010577624 patent/CN102002549A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4379691A (en) * | 1981-10-13 | 1983-04-12 | International Minerals & Chemical Corp. | Olivine bedding material for soaking pits |
Non-Patent Citations (2)
| Title |
|---|
| 《上海金属》 19820831 宝山钢铁总厂等 初轧厂均热炉用蛇纹石铺炉底、干出渣 第48-51页 1 第4卷, 第3期 * |
| 《钢铁钒钛》 19871231 姜喜元等 均热炉固体出渣工艺的研究 第80-83页 1 , 第3期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI510636B (en) * | 2012-09-24 | 2015-12-01 | China Steel Corp | An open sand for steelmaking electric arc furnace |
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Application publication date: 20110406 |