CN101333082A - Method for treating stainless steel smelting slag - Google Patents
Method for treating stainless steel smelting slag Download PDFInfo
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- CN101333082A CN101333082A CNA2007100425567A CN200710042556A CN101333082A CN 101333082 A CN101333082 A CN 101333082A CN A2007100425567 A CNA2007100425567 A CN A2007100425567A CN 200710042556 A CN200710042556 A CN 200710042556A CN 101333082 A CN101333082 A CN 101333082A
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- slag
- stainless steel
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- spray
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Abstract
The invention discloses a treatment method for stainless steel smelting slag, comprising three technologic steps: air cooling step; spraying, dipping and cooling step; as well as slag dumping step. Compared with the existing stainless steel slag treatment method, the method of the invention has an additional air-cooling step before the spraying, dipping and cooling step to evenly release the heat of the high-temperature liquid slag so as to effectively reduce the jet blast incidents; in addition, the slag is cooled and contracted to cause cracks so as to achieve better effects in the spraying, dipping and cooling step. In the spraying, dipping and cooling step, water is firstly uninterruptedly sprayed and then intermittently sprayed, followed by temperature measurement when the slag is in standing state, so as to ensure the slag cooling effect; the method can effectively prevent liquid-like slag in a slag tank, thereby avoiding jet blast caused by water in the slag dumping process.
Description
Technical field
The present invention relates to a kind of treatment process of slag, particularly a kind of treatment process of stainless steel smelting slag.
Background technology
The treatment process of stainless steel smelting slag is normally used the stainless steel slag of slag ladle splendid attire heat in the prior art, is transported to open-air cooling field, and directly spray soaks cooling, turns over the treatment process of slag then.
About 1300 ℃, composition is mainly by CaO, SiO through the transhipment temperature for the slag of discharging in the smelting process
2, oxide compound such as MgO forms, basicity is about 1.8, and according to percentage composition composition work done in the manner of a certain author CaOSiO
2(1540 ℃ of fusing points), the slag ladle standard is contained quantity of slag 12m
3, the density 2.5T/m of slag
3, once cooling realizes being cooled to 300K from 1600K, does not suppose to undergo phase transition, according to the constant voltage enthalpy change
Estimating heat energy is 4.235*10 (10 power) J, this explanation, slag heat energy is big, when direct spray soaked cooling, water coolant infiltrated the center liquid slag, can be produced steam acutely expand (1L water is transformed into steam and reaches 1700L approximately under normal pressure) rapidly by the warm sludge parcel, overcome barometric point and slag gravity does work to the external world, it is quick-fried that thereby spray takes place, and therefore, existing stainless steel smelting slag treatment process exists the quick-fried potential potential safety hazard of spray.
In addition, existing stainless steel smelting slag treatment process all is to turn over slag with the time of determining, because warm sludge amount, the composition of slag ladle splendid attire are not quite similar, be difficult to reach every pan furnace slag refrigerative effect and all reach standard, therefore the quick-fried accident of spray may take place in turning over the slag process.
Summary of the invention
In order to prevent to spray the generation of quick-fried accident, the uniformity coefficient that must reduce the slag heat power and outwards discharge just, quick-fried to prevent to spray.The present invention just is being based on this principle, invented a kind of treatment process of more safe and reliable stainless steel smelting slag, the technical scheme that it adopts is: a kind of treatment process of stainless steel smelting slag, it comprises following technical process: with the stainless steel slag of slag ladle splendid attire heat, handling is to open-air cooling field, rest on naturally cooling in the air, and get point at the different positions of tank skin and measure temperature, the top temperature of surveying is tank wall temperature≤170 ℃ in point; Then with spraying the uninterruptedly direct spray water in the surface of the slag in slag ladle of hydraulic giant, the slag top produces 80mm～100mm ponding in slag ladle, temp measuring method with the air cooling stage is identical, leave standstill the measurement tank wall temperature, if the tank skin top temperature is higher than 90 ℃, before evaporating soon, the water for the treatment of slag top remakes moisturizing, the slag top produces 80mm～100mm ponding again to the slag ladle, be to turn over stainless steel smelting slag humidity before the slag like this, prevent that humidity is too high, causes the waste of water resources in order to control, temp measuring method with the air cooling stage is identical then, leave standstill the measurement tank wall temperature again, circulation successively is until tank wall temperature≤90 ℃; The described slag step of turning over comprises: the slag of tank wall temperature≤90 ℃ is irritated be transported to the stainless steel slag stack up yard, overturning stainless steel smelting slag wherein to stack up yard is piled up.
In order to reduce airborne dust, improve the effect that the spray cooling is soaked simultaneously, the spray angle of coverage α that spray soaks in the cooling step is the 75-120 degree.
Because oven-fresh slag heat energy is big, when direct spray soaks cooling, water coolant infiltrates the center liquid slag, can be produced steam rapidly by the warm sludge parcel acutely expands, overcome barometric point and slag gravity does work to the external world, it is quick-fried that thereby spray takes place, for avoiding spraying the generation of quick-fried accident, at first will reduce the heat energy of slag, so the treatment process the first step of stainless steel smelting slag of the present invention at first to carry out air cooling, experimental results show that, when tank wall temperature top temperature≤170 ℃, the heat energy of slag can be discharged fully, enters the second step spray this moment again and soaks cooling step, can effectively avoid spraying the generation of quick-fried accident.
In addition, since the stainless steel smelting slag composition mainly by CaO, SiO
2, oxide compound such as MgO forms, these compositions are met the easy efflorescence of the water capacity, therefore the spray angle of coverage in the spray immersion cooling step will can cover whole slag ladle to the greatest extent, otherwise a part of atomizing slag can become airborne dust, the harm operator's is healthy, so the present invention sprays the spray angle of coverage employing 75-120 degree that soaks in the cooling step.
The invention has the beneficial effects as follows:
The present invention is because the preceding adding of spray immersion process for cooling step air cooling program is a naturally cooling, and the warm sludge centre can be solidified, and has reduced heat power, can effectively prevent to spray the generation of the quick-fried accident of spray in the process of cooling like this; The naturally cooling cure shrinkage forms the crack in addition, and spray is soaked in the cooling step in the easier infiltration slag of water, plays preferable cooling performance; In addition according to the tank skin top temperature as the judging criterion of whether turning over slag, objective reality has guaranteed the slag cooling performance more.
Description of drawings
Fig. 1 is spray angle of coverage synoptic diagram.
Embodiment
Embodiment 1
Use 17M
3The stainless steel slag of slag ladle splendid attire heat, handling is to open-air cooling field, rest on naturally cooling in the air, generally behind 16-20 hour air cooling, beginning discontinuous measurement tank wall temperature, when the tank skin top temperature is 170 ℃ or 160 ℃ and even more during low temperature, with spraying the uninterruptedly direct spray water in the surface of the slag in slag ladle of hydraulic giant, because through after the naturally cooling, the temperature of slag has substantial degradation, promptly there is not the melt slag to exist, can strengthen cooling water flow, to accelerate the cooling of warm sludge, therefore can uninterruptedly add water slag top in slag ladle and produce 100mm ponding, leave standstill the measurement tank wall temperature, if the tank skin top temperature is higher than 90 ℃, remake moisturizing before the water for the treatment of slag top evaporates soon, the slag top produces 100mm ponding again to the slag ladle, leaves standstill the measurement tank wall temperature again, circulation successively, until the tank skin top temperature is 90 ℃ or 85 ℃ and even more during low temperature, slag is irritated be transported to the stainless steel slag stack up yard, and overturning stainless steel smelting slag is wherein piled up to stack up yard and got final product.Ponding in spray immersion cooling step above the slag also can be controlled at 80mm or 90mm.
Fig. 1 drenches the refrigerative effect for spraying the synoptic diagram of angle of coverage α in order to improve to spray to steep, and also in order to reduce the generation of airborne dust, spraying angle of coverage α in the spray immersion cooling step in the present embodiment is 120 degree simultaneously.Certainly, spray angle of coverage α be 75 degree or 100 degree also can, just angle is big more, coverage rate is wide more, can effectively prevent the generation of airborne dust more.
Embodiment 2
Use 6M
3The stainless steel slag of slag ladle splendid attire heat, handling is to open-air cooling field, rest on naturally cooling in the air, generally behind 10-14 hour air cooling, beginning discontinuous measurement tank wall temperature, when the tank skin top temperature is 170 ℃ or 160 ℃ and even more during low temperature, with spraying the uninterruptedly direct spray water in the surface of the slag in slag ladle of hydraulic giant, because through after the naturally cooling, the temperature of slag has substantial degradation, promptly there is not the melt slag to exist, can strengthen cooling water flow, to accelerate the cooling of warm sludge, therefore can uninterruptedly add water slag top in slag ladle and produce 100mm ponding, leave standstill the measurement tank wall temperature, if the tank skin top temperature is higher than 90 ℃, remake moisturizing before the water for the treatment of slag top evaporates soon, the slag top produces 100mm ponding again to the slag ladle, leaves standstill the measurement tank wall temperature again, circulation successively, until the tank skin top temperature is 90 ℃ or 85 ℃ and even more during low temperature, slag is irritated be transported to the stainless steel slag stack up yard, and overturning stainless steel smelting slag is wherein piled up to stack up yard and got final product.Ponding in spray immersion cooling step above the slag also can be controlled at 80mm or 90mm.Fig. 1 drenches the refrigerative effect for spraying the synoptic diagram of angle of coverage α in order to improve to spray to steep, and also in order to reduce the generation of airborne dust, spraying angle of coverage α in the spray immersion cooling step in the present embodiment is 120 degree simultaneously.Certainly, spray angle of coverage α be 75 degree or 100 degree also can, just angle is big more, coverage rate is wide more, can effectively prevent the generation of airborne dust more.
In sum, the present invention has added the air cooling step before spray soaks cooling step, the heat energy of high-temperature liquid state slag is evenly discharged, and effectively reduces the generation of the quick-fried accident of spray, and slag cooling contraction produces be full of cracks makes second step spray immersion refrigerative effect better; Spray soaks uninterrupted earlier water spray in the cooling step, is interrupted spray again and leaves standstill thermometric, has guaranteed the slag cooling performance, effectively prevents there is the liquid state slag in the slag ladle, thereby avoids meeting water when turning over slag and spray quick-fried.
Claims (2)
1. the treatment process of a stainless steel smelting slag may further comprise the steps:
1) air cooling, with the stainless steel slag of slag ladle splendid attire heat, handling rests on naturally cooling in the air to open-air cooling, until tank wall temperature≤170 ℃;
2) spray soaks cooling, continuous slag surface in slag ladle is spray water directly, the slag top produces the high ponding of 80mm～100mm in slag ladle, leaves standstill, and measures tank wall temperature, if tank wall temperature is higher than 90 ℃, remake moisturizing before the water for the treatment of slag top evaporates soon, the slag top produces the high ponding of 80mm～100mm again to the slag ladle, leaves standstill the measurement tank wall temperature again, circulation successively is until tank wall temperature≤90 ℃;
3) turn over slag, the slag of tank wall temperature≤90 ℃ is irritated be transported to the stainless steel slag stack up yard, overturning stainless steel smelting slag wherein to stack up yard is piled up.
2. the treatment process of stainless steel smelting slag as claimed in claim 1 is characterized in that: spray soaks that spray angle of coverage α is 75～120 degree in the cooling step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100425567A CN101333082A (en) | 2007-06-25 | 2007-06-25 | Method for treating stainless steel smelting slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100425567A CN101333082A (en) | 2007-06-25 | 2007-06-25 | Method for treating stainless steel smelting slag |
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| Publication Number | Publication Date |
|---|---|
| CN101333082A true CN101333082A (en) | 2008-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100425567A Pending CN101333082A (en) | 2007-06-25 | 2007-06-25 | Method for treating stainless steel smelting slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071270A (en) * | 2010-12-20 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102367496A (en) * | 2011-10-10 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Cooling method for stainless steel slag |
| CN102676712A (en) * | 2012-05-07 | 2012-09-19 | 宝钢发展有限公司 | Process for cooling stainless steel slag by wet method |
| CN114350974A (en) * | 2021-12-17 | 2022-04-15 | 广西金川有色金属有限公司 | Smelting slag slow cooling process |
-
2007
- 2007-06-25 CN CNA2007100425567A patent/CN101333082A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071270A (en) * | 2010-12-20 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102071270B (en) * | 2010-12-20 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102367496A (en) * | 2011-10-10 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Cooling method for stainless steel slag |
| CN102676712A (en) * | 2012-05-07 | 2012-09-19 | 宝钢发展有限公司 | Process for cooling stainless steel slag by wet method |
| CN114350974A (en) * | 2021-12-17 | 2022-04-15 | 广西金川有色金属有限公司 | Smelting slag slow cooling process |
| CN114350974B (en) * | 2021-12-17 | 2023-08-15 | 广西金川有色金属有限公司 | Smelting slag slow cooling process |
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Application publication date: 20081231 |