CN101928807A - Method for refining high carbon molten steel by using low aluminum steel casting residue - Google Patents
Method for refining high carbon molten steel by using low aluminum steel casting residue Download PDFInfo
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- CN101928807A CN101928807A CN201010255180XA CN201010255180A CN101928807A CN 101928807 A CN101928807 A CN 101928807A CN 201010255180X A CN201010255180X A CN 201010255180XA CN 201010255180 A CN201010255180 A CN 201010255180A CN 101928807 A CN101928807 A CN 101928807A
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Abstract
The invention relates to comprehensive utilization of casting residue, in particular to a method for refining high carbon molten steel by using low aluminum steel casting residue with the Al content of less than or equal to 0.0040 percent. The method comprises the following steps of: 1, preparing refinery residue: collecting aluminum steel casting residue with the alkalinity of 2.0 to 4.5 and the Al content of less than or equal to 0.0040 percent; crushing the residue; grinding the residue; adding an inorganic adhesive agent or an organic adhesive agent; pelletizing; and baking residue; 2, adding the refinery residue prepared in step 1 within 30 seconds after the deoxidizing alloying of the molten steel; and 3, controlling the time from pouring to the refining completion within 15 to 30 minutes, and controlling basicity of the residue after the refining completion to be 2.1 to 2.8. The method has the advantageous of realizing the comprehensive cyclic utilization of the low aluminum high carbon steel casting residue, and reducing the environmental pollution and field occupation along with simple and feasible technology, low cost, good slag formation, high slag formation speed, and short slag formation time. Though the refining time is relatively prolonged, the quality of the molten steel is improved.
Description
Technical field
The present invention relates to the comprehensive utilization of low aluminum steel (being Al≤0.0040%) residual casting slag, especially belong to the method that low aluminum steel residual casting slag is used for the high-carbon liquid steel refining.
Background technology
The continuous casting residual casting slag is meant in casting process, when changing ladle, tundish, and the surplus slag that stays in ladle, the tundish.In recent years, the output of steelworks high-quality high carbon steel is significantly improving, and liquid steel refining is handled than also increase day by day thereupon, causes the liquid steel refining processing to finish that the remaining high carbon steel quantity of slag constantly increases in the ladle of back.The increase of the high carbon steel quantity of slag strengthens intractability, has to increase new slag field thus and stores and the needs that have enough to meet the need to satisfy it.This not only causes environmental pollution, and land area is big, and causes the wasting of resources.With the applicant is example, and high carbon steel output was about 1,800,000 tons in 2009, and the liquid steel refining ratio reaches 80%, and the high carbon steel residual casting slag amount of generation just is about 700,000 tons.
Through the high carbon steel residual casting slag is analyzed, its chemical property with conventional smelt with pre-melted slag consistent, have burn-off rate soon, slagging characteristics fast, therefore, develop a kind of recycle high carbon steel residual casting slag, minimizing land resources reaches the pollution to environment, seems particularly necessary.
Up to now, the high carbon steel residual casting slag of domestic and international most steelworkss all adopts technologies such as hot application method, dried slag method, high pressure water quenching, weighted-drop, patterning method to remove.But all not with it as high carbon steel residual casting slag refining materials.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, providing a kind of can make low aluminium high carbon steel residual casting slag obtain comprehensive cyclic utilization, effectively economize on resources, reduce environmental pollution and occupied ground, the simple low aluminum steel residual casting slag of technology is used for the method for high-carbon liquid steel refining.
Realize the technical measures of above-mentioned purpose:
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collect basicity at Al≤0.0040% aluminum steel residual casting slag of 2.0～4.5;
B) Al≤0.0040% aluminum steel residual casting slag is carried out fragmentation, control its granularity≤5 millimeter;
C) grind: when grinding and add white lime, add its basicity of mixture behind the white lime, the granularity of its grinding≤2 millimeter 4.5～6.0;
D) add inorganic adhesive or organic adhesive, its add-on is 2～4% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, control its spherical diameter at 5～25 millimeters;
F) toast, its storing temperature is 80～150 ℃, and storing time is 30～180 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 30 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time in 15～30 minutes, and the slag basicity of control refining after finishing is 2.1～2.8.
It is: described inorganic adhesive refers to bath of glass, bittern.
It is: described bittern is sodium-chlor, magnesium chloride, calcium chloride.
It is: described organic adhesive refers to coal tar, resol, tar, organic silicone oil, comb oil.
The present invention makes low aluminium high carbon steel residual casting slag obtain comprehensive cyclic utilization, effectively economizes on resources, and reduces environmental pollution and occupied ground, and technology is simple, also has the low advantage of cost.The slagging situation is good, and slagging speed is fast, and the slagging required time shortens, and refining time prolongs relatively, helps improving steel quality.Normal refinery practice generally contains the formed hole of carbon dust owing to carburetting in the clinker, and does not have hole in the cold clinker of test slag.
Description of drawings
Fig. 1 is a normal process slag condition
Fig. 2 is a test slag condition of the present invention
Fig. 3 is a normal process metallographic inclusion situation
Fig. 4 is the metallographic inclusion situation of the present invention's test
Embodiment
Embodiment 1
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collection basicity is Al≤0.0040% aluminum steel residual casting slag of 2.0,2.5,2.8,3.2,4.5;
B) Al≤0.0040% aluminum steel residual casting slag of collecting is carried out fragmentation, its granularity≤5 millimeter;
C) grind: when grinding and add white lime, its basicity of mixture that adds behind the white lime is 4.5, the granularity of its grinding≤2 millimeter;
D) add water glass water inorganic adhesive, its add-on is 2% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, its spherical diameter is controlled at any size of 5～25 millimeters scopes and gets final product;
F) toast, its storing temperature is 80～85 ℃, and storing time is 175～180 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 3～8 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time be in 15 minutes, and the slag basicity of control refining after finishing is 2.1.
Embodiment 2
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collection basicity is Al≤0.0040% aluminum steel residual casting slag of 2.0,2.8,3.2,3.6,4.3;
B) Al≤0.0040% aluminum steel residual casting slag of collecting is carried out fragmentation, its granularity≤5 millimeter;
C) grind: when grinding and add white lime, its basicity of mixture that adds behind the white lime is 4.8, the granularity of its grinding≤2 millimeter;
D) add sodium-chlor/magnesium chloride/calcium chloride inorganic adhesive, its add-on is 2.5% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, its spherical diameter is controlled at any size of 5～25 millimeters scopes and gets final product;
F) toast, its storing temperature is 95～100 ℃, and storing time is 150～165 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 5～10 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time be in 20 minutes, and the slag basicity of control refining after finishing is 2.3.
Embodiment 3
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collection basicity is Al≤0.0040% aluminum steel residual casting slag of 2.2,2.5,3.0,3.8,4.3;
B) the no aluminum steel residual casting slag that will collect carries out fragmentation, its granularity≤5 millimeter;
C) grind: when grinding and add white lime, its basicity of mixture that adds behind the white lime is 5.0, the granularity of its grinding≤2 millimeter;
D) add the coal tar organic adhesive, its add-on is 3.0% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, its spherical diameter is controlled at any size of 5～25 millimeters scopes and gets final product;
F) toast, its storing temperature is 105～110 ℃, and storing time is 100～105 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 15～20 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time be in 25 minutes, and the slag basicity of control refining after finishing is 2.5.
Embodiment 4
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collection basicity is Al≤0.0040% aluminum steel residual casting slag of 2.0,2.7,3.1,3.6,4.0;
B) Al≤0.0040% aluminum steel residual casting slag of collecting is carried out fragmentation, its dynamics≤5 millimeter;
C) grind: when grinding and add white lime, its basicity of mixture that adds behind the white lime is 5.6, the granularity of its grinding≤2 millimeter;
D) add the resol or the oily organic adhesive of combing, its add-on is 3.5% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, its spherical diameter is controlled at any size of 5～25 millimeters scopes and gets final product;
F) toast, its storing temperature is 125～135 ℃, and storing time is 70～80 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 18～23 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time be in 23 minutes, and the slag basicity of control refining after finishing is 2.6.
Embodiment 5
A kind of low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collection basicity is 2.2,2.7,2.9,3.0,3.6,3.8,4.2 no aluminum steel residual casting slag;
B) Al≤0.0040% aluminum steel residual casting slag of collecting is carried out fragmentation, its granularity≤5 millimeter;
C) grind: when grinding and add white lime, its basicity of mixture that adds behind the white lime is 6.0, the granularity of its grinding≤2 millimeter;
D) add tar or organic silicone oil organic adhesive, its add-on is 4.0% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, its spherical diameter is controlled at any size of 5～25 millimeters scopes and gets final product;
F) toast, its storing temperature is 145～150 ℃, and storing time is 30～40 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 25～30 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time be in 30 minutes, and the slag basicity of control refining after finishing is 2.8.
The foregoing description finishes the back to its slag after testing in refining, its result such as table 1
Slag composition detection case after table 1 refining
From table 1 situation as can be seen, the embodiment slag charge reaches requirement, and CaO content increases in the slag, and it is favourable to improving the molten steel cleanliness factor.Thereby realized purpose to the comprehensive utilization of Al≤0.0040% aluminum steel residual casting slag.
Claims (4)
1. one kind low aluminum steel residual casting slag is used for the method for high-carbon liquid steel refining, its step:
1) preparation refining slag:
A) collect basicity at Al≤0.0040% aluminum steel residual casting slag of 2.0～4.5;
B) Al≤0.0040% aluminum steel residual casting slag is carried out fragmentation, control its granularity≤5 millimeter;
C) grind: when grinding and add white lime, add its basicity of mixture behind the white lime, the granularity of its grinding≤2 millimeter 4.5～6.0;
D) add inorganic adhesive or organic adhesive, its add-on is 2～4% of Al≤0.0040% aluminum steel residual casting slag and a white lime total amount, and stirs;
E) make ball, control its spherical diameter at 5～25 millimeters;
F) toast, its storing temperature is 80～150 ℃, and storing time is 30～180 minutes, and the refining slag preparation finishes and be stand-by;
2) refining slag of the above-mentioned preparation of adding in 30 seconds after molten steel carries out deoxidation alloying;
3) control tap to the refining concluding time in 15～30 minutes, and the slag basicity of control refining after finishing is 2.1～2.8.
2. a kind of low aluminum steel residual casting slag as claimed in claim 1 is used for the method for high-carbon liquid steel refining, and it is characterized in that: described inorganic adhesive refers to bath of glass, bittern.
3. a kind of low aluminum steel residual casting slag as claimed in claim 2 is used for the method for high-carbon liquid steel refining, it is characterized in that: described bittern is sodium-chlor, magnesium chloride, calcium chloride.
4. a kind of low aluminum steel residual casting slag as claimed in claim 1 is used for the method for high-carbon liquid steel refining, it is characterized in that: described organic adhesive refers to coal tar, resol, tar, organic silicone oil, comb oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010255180XA CN101928807B (en) | 2010-08-13 | 2010-08-13 | Method for refining high carbon molten steel by using low aluminum steel casting residue |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876839A (en) * | 2011-07-15 | 2013-01-16 | 武汉钢铁(集团)公司 | Low-silicon-aluminum-killed-steel-casting-slag-based refining agent and preparation method thereof |
| CN105200192A (en) * | 2015-10-28 | 2015-12-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Liquid steel refining slag and preparation method and application thereof |
| CN106521097A (en) * | 2016-12-07 | 2017-03-22 | 钢城集团凉山瑞海实业有限公司 | Slag foaming agent pellet and preparation and using method thereof |
| CN116535140A (en) * | 2023-04-21 | 2023-08-04 | 浙江大学 | Low-carbon roadbed filler for casting residue activated agglomeration engineering dregs and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4695318A (en) * | 1986-10-14 | 1987-09-22 | Allegheny Ludlum Corporation | Method of making steel |
| JPH08337810A (en) * | 1995-06-06 | 1996-12-24 | Armco Inc | Production of iron or steel alloyed with nickel |
| CN101307376A (en) * | 2008-06-23 | 2008-11-19 | 秦皇岛首秦金属材料有限公司 | Diprotic synthetic dregs for magnesium-spraying and desulphurizing and use method |
-
2010
- 2010-08-13 CN CN201010255180XA patent/CN101928807B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4695318A (en) * | 1986-10-14 | 1987-09-22 | Allegheny Ludlum Corporation | Method of making steel |
| JPH08337810A (en) * | 1995-06-06 | 1996-12-24 | Armco Inc | Production of iron or steel alloyed with nickel |
| CN101307376A (en) * | 2008-06-23 | 2008-11-19 | 秦皇岛首秦金属材料有限公司 | Diprotic synthetic dregs for magnesium-spraying and desulphurizing and use method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876839A (en) * | 2011-07-15 | 2013-01-16 | 武汉钢铁(集团)公司 | Low-silicon-aluminum-killed-steel-casting-slag-based refining agent and preparation method thereof |
| CN102876839B (en) * | 2011-07-15 | 2014-05-14 | 武汉钢铁(集团)公司 | Low-silicon-aluminum-killed-steel-casting-slag-based refining agent and preparation method thereof |
| CN105200192A (en) * | 2015-10-28 | 2015-12-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Liquid steel refining slag and preparation method and application thereof |
| CN106521097A (en) * | 2016-12-07 | 2017-03-22 | 钢城集团凉山瑞海实业有限公司 | Slag foaming agent pellet and preparation and using method thereof |
| CN116535140A (en) * | 2023-04-21 | 2023-08-04 | 浙江大学 | Low-carbon roadbed filler for casting residue activated agglomeration engineering dregs and preparation method thereof |
| CN116535140B (en) * | 2023-04-21 | 2024-06-07 | 浙江大学 | Low-carbon roadbed filler for casting residue activated agglomeration engineering dregs and preparation method thereof |
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| CN101928807B (en) | 2012-03-07 |
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