CN1051113C - Formula of low silicon content aluminium-calcium slag and its making method - Google Patents
Formula of low silicon content aluminium-calcium slag and its making method Download PDFInfo
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- CN1051113C CN1051113C CN97121984A CN97121984A CN1051113C CN 1051113 C CN1051113 C CN 1051113C CN 97121984 A CN97121984 A CN 97121984A CN 97121984 A CN97121984 A CN 97121984A CN 1051113 C CN1051113 C CN 1051113C
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- Prior art keywords
- coke
- calcium
- aluminium
- content
- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention discloses a formula and a preparation method for low silicon content aluminum-calcium slag. The formula comprises aluminum vanadium earth, calcium stone and coke, and in the preparation method, aluminum vanadium earth ores with low content of SiO2 and calcium stones are crushed into blocks, and 25 to 29% of aluminum vanadium earth, 43 to 47% of calcium stone and 25 to 29% of coke are mixed and melted in a cupola at 1385 DEG C to form aluminum calcium slag after being discharged out of the cupola. The present invention has the characteristics of reasonable chemical composition, no free calcium oxide and good flowability and strength, can melt products at a low melting point, can effectively regulate the constituents of the slag, do not contain nitrogen, carbon and hydrogen, and can be favorable for improving the quality of steel and absorbing sulfur and oxygen.
Description
The present invention relates to the outer refined synthetic slag technical field of steel melting furnace, particularly a kind of low silicon content aluminium-calcium slag and manufacture method thereof.
At present, the external refining of molten steel is meant some refining tasks of molten steel in the steel-making industry, as degas, alloying, deoxidation, desulfurization, eliminating inclusion, adjusting and the evenly temperature, the final control and the adjustment of chemical ingredients of molten steel, and create top condition etc. for washing.The external refining of molten steel need be synthesized wash heat and handled, and synthetic wash heat is similar to reduction refining, but molten steel is only washed and alloy-free turns usefulness into, therefore is different from reduction refining again.If synthetic slag owner CaO-Al commonly used
2O
3Basic slag system, chemical ingredients is as follows: CaO50-55%, Al
2O
340-45, Sio
2≤ 5, C≤0.10, FeO＜1, select from " Electric furnace steel making principle and technology " metallurgical industry press, published P246-247 in 1996, the aluminium calcium slag that present external refining needs (synthesizing a kind of of slag system), the silicone content that requires preferably is less than below 2.5%, could guarantee the composition and the specification of quality of molten steel, at this silicone content of China at the aluminium calcium slag below 2.5, all be to use electric furnace to produce, aluminium calcium slag power consumption per ton is up to the 1200-1400 degree, raw material bauxite selective oxidation aluminium powder causes this silicone content quite high less than 2.5% aluminium calcium slag cost, it is promoted the use of be restricted.
The purpose of this invention is to provide a kind of low SiO
2Aluminium calcium slag of content and preparation method thereof.
Technical scheme of the present invention is finished like this.
The consisting of of described aluminium calcium slag (by weight percentage):
CaO50-54%, Al
2O
341-46%, SiO
2(2.5%, Fe
2O
3＜1.5%, its mineral phase structure is 12CaO.7Al
2O
3, true specific gravity is 3.08g/cm
3, bulk density is 1.36-1.65g/cm
2
The manufacturing technology steps of described aluminium calcium slag is:
1.. the preparation of raw material, select low levels SiO
2Aluminium vanadine ore, calcium carbonate mineral standby, wherein contain Al
2O
3Be that 70% ± 2 aluminium vanadine is 36.8-38.2%; The calcium carbonate mineral that contains CaO53% ± 1 is 63.2-61.8%;
2.. described aluminium vanadine ore, calcium carbonate mineral are broken into the bulk of 80-100mm, and coke is selected the lump coke of 80-100mm, and the C content of coke is more than 88%, and the content of coke accounts for 34.7% of aluminium vanadine and calcium carbonate mineral gross weight;
3.. the SiO in control raw material and the coke
2Content makes the SiO in the finished product
2Content＜2.5%;
4.. above-mentioned raw materials is carried out melting with described coke as fuel in cupola furnace;
5.. when furnace temperature reaches 1385 ℃, come out of the stove after the furnace charge fusing in the stove; Batching adds continuously;
6.. the aluminium calcium slag after coming out of the stove, can cool off bulk, also can be broken into granular through water;
The characteristics of low silicon content aluminium-calcium slag of the present invention are: have rational chemical constitution, low-melting characteristics, owing to be to give the product of founding, can be energy-conservation in steelmaking process, the speed that is fused to molten steel is fast, can regulate the slag composition effectively, nonnitrogenous, carbon, hydrogen help improving steel quality, no free calcium oxide has good mobility, strong basicity; Help absorbing sulphur and oxygen, free-floride; Help improving operating environment, stable performance; Help the steel-making operation.
Embodiment 1
Consisting of (by weight percentage, following examples are together) of the low silicon content aluminium-calcium slag of being produced:
CaO50-54%, Al
2O
341-46%, SiO
2＜2.5%, Fe
2O
3＜1.5%, its mineral phase structure is 12CaO.7Al
2O
3, true specific gravity is 3.08g/cm
3, bulk density is 1.36-1.65g/cm
2
The processing step of its manufacturing is:
1.. the preparation of raw material, select low levels SiO
2Aluminium vanadine ore, calcium carbonate mineral standby, wherein contain Al
2O
3Be that 70% ± 2 aluminium vanadine is 36.8-38.2%; The calcium carbonate mineral that contains CaO53% ± 1 is 61.8-63.2%;
2.. described aluminium vanadine ore, calcium carbonate mineral are broken into the bulk of 80-100mm, and coke is selected the lump coke of 80-100mm, and the C content of coke is more than 88%, and the content of coke accounts for 34.7% of aluminium vanadine and calcium carbonate mineral gross weight,
3.. the SiO in control raw material and the coke
2Content makes the SiO in the finished product
2Content＜2.5%;
4.. above-mentioned raw materials is carried out melting with described coke as fuel in cupola furnace;
5.. when furnace temperature reaches 1385 ℃, come out of the stove after the furnace charge fusing in the stove; Batching adds continuously;
6.. the aluminium calcium slag after coming out of the stove, can cool off bulk, also can be broken into granular through water;
Embodiment 2
Get aluminium vanadine 26%, calcium carbonate mineral 46% is a raw material, gets coke 28% and is fuel, and will prepare burden to stir is mixed; All the other are with embodiment 1.
Embodiment 3
Get aluminium vanadine 27%, calcium carbonate mineral 45% is a raw material, gets coke 28% and is fuel, and will prepare burden to stir is mixed; All the other are with embodiment 1.
Embodiment 4
Get aluminium vanadine 28%, calcium carbonate mineral 44% is a raw material, gets coke 28% and is fuel, and will prepare burden to stir is mixed; All the other are with embodiment 1.
Embodiment 5
Get aluminium vanadine 29%, calcium carbonate mineral 43% is a raw material, gets coke 28% and is fuel, and will prepare burden to stir is mixed; All the other are with embodiment 1.
Embodiment 6
Get aluminium vanadine 29%, calcium carbonate mineral 45% is got coke 26% and is fuel, and will prepare burden to stir is mixed; All the other are with embodiment 1.
Index by the foregoing description synthetic aluminium calcium slag is as follows:
Chemical Composition: CaO50-54%; Al
2O
341-46%; SiO
2＜2.5%; Fe
2O
3＜1.5%; F 0%;
Fusing point＜1385 ℃; True specific gravity 3.08/cm
3Bulk density 1.36-1.65g/cm
3
Mineral phase structure 12CaO7Al
2O
3
Claims (2)
1. low silicon content aluminium-calcium slag, it consists of (by weight percentage):
CaO50-554%, Al
2O
341-46%, SiO
2＜2.5%, Fe
2O
3＜1.5%, its mineral phase structure is 12CaO.7Al
2O
3, true specific gravity is 3.08g/cm
3, bulk density is 1.36-1.655g/cm
2
2. the manufacture method of the low silicon content aluminium-calcium slag of claim 1 the steps include:
1.. the preparation of raw material, select low levels SiO
2Aluminium vanadine ore, calcium carbonate mineral standby, wherein contain Al
2O
3Be that 70% ± 2 aluminium vanadine is 36.8-38.2%; The calcium carbonate mineral that contains CaO53% ± 1 is 63.2-61.8%;
2.. described aluminium vanadine ore, calcium carbonate mineral are broken into the bulk of 80-100mm, and coke is selected the lump coke of 80-100mm, and the C content of coke is more than 88%, and the content of coke accounts for 34.7% of aluminium vanadine and calcium carbonate mineral gross weight;
3.. the SiO in control raw material and the coke
2Content makes the SiO in the finished product
2Content＜2.5%;
4.. above-mentioned raw materials is carried out melting with described coke as fuel in cupola furnace;
5.. when furnace temperature reaches 1385 ℃, come out of the stove after the furnace charge fusing in the stove; Batching adds continuously;
6.. the aluminium calcium slag after coming out of the stove, can cool off bulk, also can be broken into granular through water;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121984A CN1051113C (en) | 1997-12-05 | 1997-12-05 | Formula of low silicon content aluminium-calcium slag and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121984A CN1051113C (en) | 1997-12-05 | 1997-12-05 | Formula of low silicon content aluminium-calcium slag and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1188154A CN1188154A (en) | 1998-07-22 |
| CN1051113C true CN1051113C (en) | 2000-04-05 |
Family
ID=5176592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97121984A Expired - Fee Related CN1051113C (en) | 1997-12-05 | 1997-12-05 | Formula of low silicon content aluminium-calcium slag and its making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051113C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045803A (en) * | 2012-12-30 | 2013-04-17 | 南阳汉冶特钢有限公司 | Process for producing low-silicon clean molten steel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170763A (en) * | 1997-05-19 | 1998-01-21 | 具龙善 | Method for producing refining flux in steel making and use |
-
1997
- 1997-12-05 CN CN97121984A patent/CN1051113C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170763A (en) * | 1997-05-19 | 1998-01-21 | 具龙善 | Method for producing refining flux in steel making and use |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045803A (en) * | 2012-12-30 | 2013-04-17 | 南阳汉冶特钢有限公司 | Process for producing low-silicon clean molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1188154A (en) | 1998-07-22 |
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