CN102719608A - Temperature compensation method for molten steel in steel ladle - Google Patents
Temperature compensation method for molten steel in steel ladle Download PDFInfo
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- CN102719608A CN102719608A CN2012100875678A CN201210087567A CN102719608A CN 102719608 A CN102719608 A CN 102719608A CN 2012100875678 A CN2012100875678 A CN 2012100875678A CN 201210087567 A CN201210087567 A CN 201210087567A CN 102719608 A CN102719608 A CN 102719608A
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- ladle
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- molten steel
- steel ladle
- temperature
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Abstract
The invention provides a temperature compensation method for molten steel in a steel ladle. The method comprises the steps of take the measures of slag stopping when converter is carried out, and when steel is ladled controlling the temperature of the inner wall of the steel ladle between 900 and 1000 DEG C; after converter tapping is finished, according to the proportion of 3 to 7kg per ton of steel adding a temperature raising agent which is prepared by evenly dry-mixing industrial aluminum powder or aluminum granule, crushed metallurgical waste iron scale and metallurgical lime screening material powder to the top of the molten steel in the steel ladle, and covering the steel ladle with an insulating cover. The method provided by the invention which is free from the change of the steel ladle and the equipment, additional facilities, more investment, and the change of the structure of the steel ladle modifies the physical property of the slag at the top of the steel ladle by adding the temperature raising agent consisting of metallurgical wastes to the molten steel, and compensates for the temperature loss of the molten steel by using the chemical heat generated by the reaction, thereby the temperature drop of the molten steel can reduce by 20.1 DEG C. The method provided by the invention is characterized by simple process, easy operation, low investment, quick effect, low cost and less energy.
Description
Technical field
The invention belongs to the process for making technical field, relate in particular to a kind of method of utilizing heating agent to compensate the molten steel ladle temperature loss.
Background technology
Behind the converter tapping, containing molten steel in ladle in the ladle circular flow, will lose certain temperature inevitably, in order to remedy this part thermosteresis, often is to realize through improving the converter tapping temperature.Not only cause scrap ratio to descend but improve the converter tapping temperature, and the loss of anti-material is serious, therefore, for compensating this part temperature loss, guarantees refining temperature, the object and the way of solution concentrate on the ladle mostly.
Number of patent application 201020236888.6 discloses a kind of " ladle bottom baking auxiliary combustion equipment ", mainly is to be blown into oxygen through auxiliary combustion equipment, improves the ladle baking effect, improves ladle and uses effect and turnover rate.But this method need be transformed on equipment and drop into.
" composition of raw materials of ladle heat insulation cover and the preparation method of ladle heat insulation cover " (application number 200910097750.4) then all is to reduce temperature drop through increasing insulation cover with " ladle whole process adds the lid may enclose attemperator " (publication number CN93228802.2); Its simple possible; Excellent thermal insulation performance, energy-saving effect is better.But can only slow down the molten steel temperature drop rate, and can not improve molten steel temperature.
Chinese patent " two thermal insulation layer refining ladle " (200820098622.2) then is to take to add the method that is coated with thermal insulation coatings at thermal insulation layer and permanent layer surface, to improve exhausted people heat insulation effect once.The defective of this method is that the difficulty of building by laying bricks or stones of ladle lining increases.
Except above-mentioned on ladle, take measures, taking of also having compensates temperature drop loss to the method that molten steel heats.For example CN200410000096.8 disclosed " a kind of low temperature drop steel ladle pouring method " is in the steel ladle pouring process, to utilize combustion gas and efficient burner that molten steel is heated.CN97119787.3 then is that the liquid steel level that the using plasma torch is followed the tracks of in the ladle heats continuously, the temperature drop of molten steel in the compensation casting process.But aforesaid method common defective is to need relevant equipment support and maintenance.
Summary of the invention
The present invention aims to provide that a kind of technology is simple, and cost is lower, can effectively remedy the thermosteresis of molten steel in the steel ladle pouring process, guarantees the molten steel ladle temperature compensation that the refining procedure temperature needs.
For this reason, the solution that the present invention taked is:
A kind of molten steel ladle temperature compensation is characterized in that, concrete grammar is:
1, heating agent preparation:
It is even that metallurgical waste iron scale after industrial aluminium powder or aluminum shot, the pulverizing and metallurgy lime undersize dried bean noodles are mixed, and subsequent use by every bag of 10kg pack; The compound composition consists of: Al 20-40wt%, FeO 40-60 wt%, CaO 20-50wt%;
2, technology controlling and process:
The pushing off the slag measure is taked in converter, and strict control is the quantity of slag≤50Kg down;
When containing steel, the ladle inner wall temperature is controlled at 900-1000 ℃;
After converter tapping finishes,,, on the molten steel ladle end face, add subsequent use heating agent, and build insulation cover according to the ratio of steel 3-7kg per ton through charging chute or artificial investing method.
Adopt medium argon flow amount and pressure, pressure is that 0.2 ~ 0.25MPa, flow are 150 ~ 200Nl/min, and molten steel ladle is stirred, and impels the ladle top slag material evenly to spread out.
Compared with prior art, beneficial effect of the present invention is:
The present invention is through adding a certain amount of heating agent in molten steel, utilize oxygen reaction liberated heat in metallic aluminium and red stone and the air to come the ladle thermosteresis of compensated part, for example owing to ladle Bao Kou top convection current, thermal radiation and inclusion heat radiation etc.Reaction product and Al
2O
3Or the CaO combination, control basicity is greater than 1. existence owing to lime powder, and acid product A l both can neutralize
2O
3, can make Al and FeO deferred reaction again, prolong heat-up time.
The present invention is not needing that ladle and equipment are carried out any transformation; Need not increases under the prerequisite of other facilities and more investments and the structure that does not change ladle, mainly is through in molten steel, adding the heating agent of being made up of metallurgical waste, the ladle top slag rerum natura being carried out upgrading; The chemical heat of utilizing reaction to generate; Remedy the temperature loss of molten steel, thereby can reduce 20.1 ℃ of the temperature drops of molten steel, effectively improved the molten steel charging temperature of rear portion refining furnace.Its technology is simple, is convenient to operation, and reduced investment, instant effect, cost are low, saves the energy, and recyclable with utilize metallurgical waste.
Embodiment
Be example with 100 tons of converters and 100 tons of ladles below, the present invention is further specified.
Embodiment 1:
1, heating agent preparation:
According to Al 20wt% in the compound; FeO 55wt%; The one-tenth of CaO 25wt% is grouped into, and metallurgical waste iron scale after industrial aluminium powder or aluminum shot, the pulverizing and metallurgy lime undersize powder are carried out the ratio batching, will prepare burden dried be mixed even; Form the heating agent compound, and subsequent use by the quantity pack of every bag of 10kg.
2, technology controlling and process:
The pushing off the slag measure is taked in converter, and the quantity of slag is at 45Kg under the control.
Sheng Gangqian reaches 900 ℃ with ladle baking to inner wall temperature.
Converter tapping adds the subsequent use heating agent of 700kg through charging chute, and builds insulation cover after finishing on the molten steel ladle end face.
Employing pressure is that 0.2MPa, flow are that the 200Nl/min argon gas stirs molten steel ladle, impels the ladle top slag material evenly to spread out.
Embodiment 2:
1, heating agent preparation:
According to Al 30wt% in the compound; FeO40 wt%; The one-tenth of CaO 30wt% is grouped into, and metallurgical waste iron scale after industrial aluminium powder or aluminum shot, the pulverizing and metallurgy lime undersize powder are carried out the ratio batching, will prepare burden dried be mixed even; Form the heating agent compound, and subsequent use by the quantity pack of every bag of 10kg.
2, technology controlling and process:
The pushing off the slag measure is taked in converter, and strict control is quantity of slag 49Kg down.
Sheng Gangqian reaches 1000 ℃ with ladle baking to inner wall temperature.
Converter tapping adds the subsequent use heating agent of 400kg through manual work, and builds insulation cover after finishing on the molten steel ladle end face.
Employing pressure is that 0.25MPa, flow are that the 150Nl/min argon gas stirs molten steel ladle, impels the ladle top slag material evenly to spread out.
Embodiment 3:
1, heating agent preparation:
According to Al 25wt% in the compound; FeO 40 wt%; The one-tenth of CaO 35wt% is grouped into, and metallurgical waste iron scale after industrial aluminium powder or aluminum shot, the pulverizing and metallurgy lime undersize powder are carried out the ratio batching, will prepare burden dried be mixed even; Form the heating agent compound, and subsequent use by the quantity pack of every bag of 10kg.
2, technology controlling and process:
The pushing off the slag measure is taked in converter, and strict control is quantity of slag 40kg down.
Sheng Gangqian reaches 950 ℃ with ladle baking to inner wall temperature.
Converter tapping adds the subsequent use heating agent of 550kg through charging chute, and builds insulation cover after finishing on the molten steel ladle end face.
Adopting 0.22MPa, flow is that the 180Nl/min argon gas stirs molten steel ladle, impels the ladle top slag material evenly to spread out.
Claims (1)
1. a molten steel ladle temperature compensation is characterized in that, concrete grammar is:
(1), heating agent preparation:
It is even that metallurgical waste iron scale after industrial aluminium powder or aluminum shot, the pulverizing and metallurgy lime undersize dried bean noodles are mixed, and subsequent use by every bag of 10kg pack; The compound composition consists of: Al 20-40wt%, FeO 40-60 wt%, CaO 20-50wt%;
(2), technology controlling and process:
The pushing off the slag measure is taked in converter, and strict control is the quantity of slag≤50Kg down;
When containing steel, the ladle inner wall temperature is controlled at 900-1000 ℃;
After converter tapping finishes,,, on the molten steel ladle end face, add subsequent use heating agent, and build insulation cover according to the ratio of steel 3-7kg per ton through charging chute or artificial investing method;
Adopt medium argon flow amount and pressure, pressure is that 0.2 ~ 0.25MPa, flow are 150 ~ 200Nl/min, and molten steel ladle is stirred, and impels the ladle top slag material evenly to spread out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100875678A CN102719608A (en) | 2012-03-29 | 2012-03-29 | Temperature compensation method for molten steel in steel ladle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100875678A CN102719608A (en) | 2012-03-29 | 2012-03-29 | Temperature compensation method for molten steel in steel ladle |
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| CN102719608A true CN102719608A (en) | 2012-10-10 |
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| CN2012100875678A Pending CN102719608A (en) | 2012-03-29 | 2012-03-29 | Temperature compensation method for molten steel in steel ladle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042188A (en) * | 2019-04-30 | 2019-07-23 | 马鞍山钢铁股份有限公司 | A method of bessemerizing outlet temperature compensation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736134A (en) * | 2008-11-27 | 2010-06-16 | 宝山钢铁股份有限公司 | Method to modify the steel slag by aluminothermic reduction reaction |
| CN102071279A (en) * | 2010-12-21 | 2011-05-25 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
-
2012
- 2012-03-29 CN CN2012100875678A patent/CN102719608A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736134A (en) * | 2008-11-27 | 2010-06-16 | 宝山钢铁股份有限公司 | Method to modify the steel slag by aluminothermic reduction reaction |
| CN102071279A (en) * | 2010-12-21 | 2011-05-25 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042188A (en) * | 2019-04-30 | 2019-07-23 | 马鞍山钢铁股份有限公司 | A method of bessemerizing outlet temperature compensation |
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Application publication date: 20121010 |