CN102212641A - Rapid slagging method - Google Patents
Rapid slagging method Download PDFInfo
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- CN102212641A CN102212641A CN2011101604683A CN201110160468A CN102212641A CN 102212641 A CN102212641 A CN 102212641A CN 2011101604683 A CN2011101604683 A CN 2011101604683A CN 201110160468 A CN201110160468 A CN 201110160468A CN 102212641 A CN102212641 A CN 102212641A
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Abstract
The invention discloses a rapid slagging method. In a steel-making process of a converter, molten iron and steel scrap in a blast furnace are used as metal smelting raw materials; active lime, light burned dolomite and light burning magnesium ball are used as smelting and slagging materials; at the beginning of smelting after the metal smelting raw materials are added to the converter, the rapid slagging process is carried out by controlling the addition amount, the oxygen supply intensity and the lance position of the smelting and slagging materials, wherein the addition amount of the active lime is 2500-5000 kg; the addition amount of the light burned dolomite is 500-2000 kg; the addition amount of the light burning magnesium ball is 200-1000 kg; the oxygen supply intensity is 3.2-3.8 m<3>/t.min; and the lance position is controlled within 1200-1800 mm. The rapid slagging method disclosed by the method can be used for rapidly forming slag having a certain alkalinity and oxidability and good mobility in the steel-making process of the converter.
Description
Technical field
The present invention relates to a kind of method of quick slagging, the quick slagging method in specifically a kind of converter steelmaking.
Background technology
So-called steel-making will be refined slag exactly, the top priority of bessemerizing be exactly requirement make rapidly have certain basicity and oxidisability, the slag of good fluidity.Suitable basic slag can prolong furnace lining life-span, quicken infection and mass transfer in the molten bath, develop effectively melt emulsification, alleviate the purpose that splash improves the molten steel recovery rate and reaches early stage a large amount of dephosphorizations.These all require quick slagging when converter begins to smelt.At present, slagging speed is slow when beginning to smelt owing to converter, and the corroding thickness of converter furnace wall furnace lining is generally 50mm, and the molten steel recovery rate of converter is 90%, and the converter molten steel dephosphorization rate is 85%.
Summary of the invention
In order to improve slagging speed, the purpose of this invention is to provide a kind of method of quick slagging, the quick slagging of this method energy when converter steelmaking can improve lining life, molten steel recovery rate and dephosphorization rate.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of quick slagging, it is characterized in that: this method is in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 2500～5000kg, and the light dolomite add-on is 500～2000kg, and the calcined magnesite ball add-on is 200～1000kg, and the intensity of oxygen supply is 3.2～3.8m
3/ t.min, the rifle position is controlled at 1200mm～1800mm.
Among the present invention, described blast-melted carbon content is 4.2～5.0%, silicone content is 0.20～1.0%,, manganese content is 0.20～0.80%, phosphorus content is 0.100～0.140%, sulphur content is 0.005～0.050%, molten iron temperature is 1200～1400 ℃, steel scrap phosphorus content≤0.030%.
The present invention in convertor steelmaking process, can make rapidly have certain basicity and oxidisability, the slag of good fluidity, can guarantee the corroding thickness≤30mm of converter furnace wall furnace lining, molten steel recovery rate 〉=91.8% of converter, converter molten steel dephosphorization rate 〉=87.5%.The present invention is specially adapted in 150 tons of convertor steelmaking process, and economic benefit obviously improves.
Embodiment
Embodiment 1
A kind of method of quick slagging, in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 2500kg, and the light dolomite add-on is 500kg, and the calcined magnesite ball add-on is 200kg; The intensity of oxygen supply is 3.2m
3/ t.min; The rifle position is controlled at 1200mm.
Blast-melted carbon content is 4.2%, silicone content is 0.20%, manganese content is 0.20%, phosphorus content is 0.100%, sulphur content is 0.005%, molten iron temperature is 1200 ℃, steel scrap phosphorus content≤0.015%;
Use the method for the quick slagging of converter steelmaking of present embodiment, the corroding thickness of converter furnace wall furnace lining is 12mm, the molten steel recovery rate 92.5% of converter, converter molten steel dephosphorization rate 89.8%.Economic benefit obviously improves.
Embodiment 2
The method of another quick slagging, in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 2900kg, and the light dolomite add-on is 625kg, and the calcined magnesite ball add-on is 465kg; The intensity of oxygen supply is 3.3m
3/ t.min; The rifle position is controlled at 1300mm.
Blast-melted carbon content is 4.4%, silicone content is 0.40%, manganese content is 0.40%, phosphorus content is 0.110%, sulphur content is 0.015%, molten iron temperature is 1250 ℃, steel scrap phosphorus content≤0.025%.
Use the method for the quick slagging of converter steelmaking of present embodiment, the corroding thickness of converter furnace wall furnace lining is 13mm, the molten steel recovery rate 92.3% of converter, converter molten steel dephosphorization rate 89.5%.
Embodiment 3
The method of another quick slagging, in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 4100kg, and the light dolomite add-on is 1225kg, and the calcined magnesite ball add-on is 685kg; The intensity of oxygen supply is 3.5m
3/ t.min; The rifle position is controlled at 1450mm.
Blast-melted carbon content is 4.6%, silicone content is 0.60%, manganese content is 0.70%, phosphorus content is 0.130%, sulphur content is 0.035%, molten iron temperature is 1350 ℃, steel scrap phosphorus content≤0.030%.
Use the method for the quick slagging of converter steelmaking of present embodiment, the corroding thickness of converter furnace wall furnace lining is 14mm, the molten steel recovery rate 92.3% of converter, converter molten steel dephosphorization rate 89.3%.
Embodiment 4
The method of another quick slagging, in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 5000kg, and the light dolomite add-on is 2000kg, and the calcined magnesite ball add-on is 1000kg; The intensity of oxygen supply is 3.8m
3/ t.min; The rifle position is controlled at 1800mm.
Blast-melted carbon content is 5.0%, silicone content is 1.0%, manganese content is 0.80%, phosphorus content is 0.140%, sulphur content is 0.050%, molten iron temperature is 1400 ℃, steel scrap phosphorus content≤0.030%.
Use the method for the quick slagging of converter steelmaking of present embodiment, the corroding thickness of converter furnace wall furnace lining is 20mm, the molten steel recovery rate 92.1% of converter, converter molten steel dephosphorization rate 89.1%.
The present invention in convertor steelmaking process, can make rapidly have certain basicity and oxidisability, the slag of good fluidity, the corroding thickness≤30mm of converter furnace wall furnace lining, molten steel recovery rate 〉=91.8% of converter, converter molten steel dephosphorization rate 〉=87.5%.Economic benefit obviously improves.
Claims (2)
1. the method for a quick slagging, it is characterized in that: this method is in converter steelmaking process, adopt blast-melted and steel scrap as the metal smelting raw material, adopt quickened lime, light dolomite, calcined magnesite ball as the smelting slag making material, carry out quick slagging by add-on, oxygen supply intensity, the rifle position of control smelting slag making material when after converter adds the metal smelting raw material, beginning to smelt; Wherein, the add-on of quickened lime is 2500～5000kg, and the light dolomite add-on is 500～2000kg, and the calcined magnesite ball add-on is 200～1000kg, and the intensity of oxygen supply is 3.2～3.8m
3/ t.min, the rifle position is controlled at 1200mm～1800mm.
2. the method for quick slagging according to claim 1, it is characterized in that: described blast-melted carbon content is 4.2～5.0%, silicone content is 0.20～1.0%,, manganese content is 0.20～0.80%, phosphorus content is 0.100～0.140%, sulphur content is 0.005～0.050%, molten iron temperature is 1200～1400 ℃, steel scrap phosphorus content≤0.030%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101604683A CN102212641A (en) | 2011-06-15 | 2011-06-15 | Rapid slagging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101604683A CN102212641A (en) | 2011-06-15 | 2011-06-15 | Rapid slagging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102212641A true CN102212641A (en) | 2011-10-12 |
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| CN2011101604683A Pending CN102212641A (en) | 2011-06-15 | 2011-06-15 | Rapid slagging method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603147A (en) * | 2016-03-08 | 2016-05-25 | 唐山钢铁集团有限责任公司 | Converter slag forming process for rapid slagging |
| CN111139332A (en) * | 2020-01-21 | 2020-05-12 | 鞍钢股份有限公司 | Slag former and light and thin scrap steel mixed processing furnace entering process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421554A (en) * | 1980-10-29 | 1983-12-20 | Stahlwerke Peine-Salzgitter Ag | Production of steel in a basic converter employing liquid converter slag |
| CN1110719A (en) * | 1994-04-21 | 1995-10-25 | 鞍山钢铁公司 | Slag fomation agent for adding magnesium in magnesium balls for smelting steel |
-
2011
- 2011-06-15 CN CN2011101604683A patent/CN102212641A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421554A (en) * | 1980-10-29 | 1983-12-20 | Stahlwerke Peine-Salzgitter Ag | Production of steel in a basic converter employing liquid converter slag |
| CN1110719A (en) * | 1994-04-21 | 1995-10-25 | 鞍山钢铁公司 | Slag fomation agent for adding magnesium in magnesium balls for smelting steel |
Non-Patent Citations (1)
| Title |
|---|
| 冯捷等: "《转炉炼钢生产》", 31 May 2006, 北京冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603147A (en) * | 2016-03-08 | 2016-05-25 | 唐山钢铁集团有限责任公司 | Converter slag forming process for rapid slagging |
| CN111139332A (en) * | 2020-01-21 | 2020-05-12 | 鞍钢股份有限公司 | Slag former and light and thin scrap steel mixed processing furnace entering process |
| CN111139332B (en) * | 2020-01-21 | 2021-04-27 | 鞍钢股份有限公司 | Slag former and light and thin scrap steel mixed processing furnace entering process |
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Application publication date: 20111012 |