CN101619374A - Method for controlling furnace bottom by adding ferro-silicon - Google Patents
Method for controlling furnace bottom by adding ferro-silicon Download PDFInfo
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- CN101619374A CN101619374A CN200810012064A CN200810012064A CN101619374A CN 101619374 A CN101619374 A CN 101619374A CN 200810012064 A CN200810012064 A CN 200810012064A CN 200810012064 A CN200810012064 A CN 200810012064A CN 101619374 A CN101619374 A CN 101619374A
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- furnace bottom
- converter
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- height
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Abstract
The invention relates to a method for controlling a furnace bottom by adding ferro-silicon, which adopts a mode of adding the ferro-silicon while blowing oxygen into a furnace to control the height of the furnace bottom of a combined blowing converter. Compared with the prior art, the method has the advantage of ensuring the existence of a bottom gun of the combined blowing converter to achieve stable converting effect. Taking a 250-ton top-bottom combined blowing converter as an example, the furnace bottom height BL value is stably controlled to be about 200 centimeters, thus the smelting effect of the top-bottom combined blowing converter is ensured, the smelting time of the converter is reduced by 1.5 minutes, the slugging in the converter is good, the dephosphorizing effect is stable, and the final phosphorus content is less than 150 ppm and accounts for 98 percent.
Description
Technical field
The present invention relates to a kind of method of metallurgy industry control furnace bottom height.
Background technology
Top and bottom combined blown converter furnace bottom height is owing to there is the height that needs the control furnace bottom in rifle at the bottom of the furnace bottom, and the furnace bottom height fluctuation is all brought negative influence to the control of smelting process slag and the body of heater maintenance of converter greatly.The furnace bottom height is controlled at 200cm-220cm and safeguards more satisfactory to smelting operation and body of heater.When the furnace bottom height was lower than 200cm, the position etch of furnace lining segment was serious, occurred running in the smelting process phenomenon of slag when the furnace bottom height is higher than 260cm easily.
Therefore need control the furnace bottom height of combined blown converter, reach stable metallurgical effect.
Summary of the invention
The purpose of this invention is to provide a kind of method that adds ferro-silicon furnace bottom control furnace bottom, this method adopts in the oxygen blown mode that adds ferrosilicon simultaneously, can guarantee that the end rifle of combined blown converter exists, and reaches stable blowing effect.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of method that adds ferro-silicon furnace bottom control furnace bottom, this method employing oxygen blown mode that adds ferrosilicon simultaneously in stove is controlled combined blown converter furnace bottom height.
Compared with prior art, the invention has the beneficial effects as follows: the end rifle that can guarantee combined blown converter exists, and reaches stable blowing effect.With 260 tons of top and bottom combined blown converters is example, and furnace bottom height B L value stabilization is controlled near the 200cm, has guaranteed the metallurgical effect of top and bottom combined blown converter, reduced the tap to tap time of converter 1.5 minutes, stove internalization slag is good, and dephosphorization effect is stable, and end phosphorus content accounts for 98% less than 150ppm.
Embodiment
Embodiment 1
Present embodiment is the furnace bottom control at the converter of 200-300 ton, and employing oxygen blown mode that adds ferrosilicon simultaneously in stove can be controlled top and bottom combined blown converter furnace bottom height fast, can the top and bottom combined blown converter furnace bottom is highly stable near 200cm, guaranteed metallurgical effect.Concrete operation method is as follows:
1) spatter slag operation before changing furnace bottom, in the time of deslagging with the bits evacuation;
2) the rifle position is at 100cm, oxygen rifle flow 15000-20000Nm
3/ h, time length 90S; The rifle position is at 100cm, oxygen rifle flow 30000-50000Nm
3/ h, time length 30S; The rifle position is at 80cm, oxygen rifle flow 30000-50000Nm
3/ h, time length 30S;
3) the ferrosilicon add-on is 200-400Kg, ferrosilicon silicon content 72-78%.
Embodiment 2
Present embodiment is the furnace bottom control at the converter of 150-200 ton, and employing oxygen blown mode that adds ferrosilicon simultaneously in stove can be controlled top and bottom combined blown converter furnace bottom height fast, can the top and bottom combined blown converter furnace bottom is highly stable near 200cm, guaranteed metallurgical effect.Concrete operation method is as follows:
1) spatter slag operation before changing furnace bottom, in the time of deslagging with the bits evacuation;
2) the rifle position is at 100cm, oxygen rifle flow 8000-15000Nm
3/ h, time length 90S; The rifle position is at 100cm, oxygen rifle flow 15000-30000Nm
3/ h, time length 30S; The rifle position is at 80cm, oxygen rifle flow 15000-30000Nm
3/ h, time length 30S;
3) the ferrosilicon add-on is 150-200Kg, ferrosilicon silicon content 72-78%.
Converter for other type can be done suitably to adjust to the parameters such as add-on of oxygen flow, rifle position, time length, ferrosilicon.
Claims (1)
1, a kind of method that adds ferro-silicon furnace bottom control furnace bottom is characterized in that, this method employing oxygen blown mode that adds ferrosilicon simultaneously in stove is controlled combined blown converter furnace bottom height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012064A CN101619374A (en) | 2008-06-30 | 2008-06-30 | Method for controlling furnace bottom by adding ferro-silicon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012064A CN101619374A (en) | 2008-06-30 | 2008-06-30 | Method for controlling furnace bottom by adding ferro-silicon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101619374A true CN101619374A (en) | 2010-01-06 |
Family
ID=41512785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810012064A Pending CN101619374A (en) | 2008-06-30 | 2008-06-30 | Method for controlling furnace bottom by adding ferro-silicon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101619374A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114168A (en) * | 2013-02-26 | 2013-05-22 | 莱芜钢铁集团有限公司 | Method for removing residual steel slag at converter bottom |
| CN107083469A (en) * | 2017-05-09 | 2017-08-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing steelmaking converter furnace bottom |
-
2008
- 2008-06-30 CN CN200810012064A patent/CN101619374A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114168A (en) * | 2013-02-26 | 2013-05-22 | 莱芜钢铁集团有限公司 | Method for removing residual steel slag at converter bottom |
| CN103114168B (en) * | 2013-02-26 | 2014-12-31 | 莱芜钢铁集团有限公司 | Method for removing residual steel slag at converter bottom |
| CN107083469A (en) * | 2017-05-09 | 2017-08-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing steelmaking converter furnace bottom |
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| PB01 | Publication | ||
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Application publication date: 20100106 |