CN100582263C - Method for aluminum production through vertical shaft kiln - Google Patents
Method for aluminum production through vertical shaft kiln Download PDFInfo
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- CN100582263C CN100582263C CN200610031859A CN200610031859A CN100582263C CN 100582263 C CN100582263 C CN 100582263C CN 200610031859 A CN200610031859 A CN 200610031859A CN 200610031859 A CN200610031859 A CN 200610031859A CN 100582263 C CN100582263 C CN 100582263C
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Abstract
This invention discloses an aluminum-smelting method with a shaft furnace. Traditional method comprises two independent processes, i.e., extracting pure aluminum oxide from aluminum ore by Bayer method, and smelting aluminum oxide into aluminum metal by Hall electrolysis method. The method is suitable for aluminum ore with more than 60% aluminum oxide only, and has such problems of long process flow, complex process, high electricity and material consumption, and high cost. The method is this invention omits aluminum oxide production and aluminum electrolysis processes, and adopts a shaft furnace for melting aluminum ore, reducing and refining to obtain aluminum metal. The method has such advantages as low electricity and material consumption, and low cost. The method is also suitable for low grade aluminum ore, as well as aluminum ore with high iron and sulfur contents.
Description
Technical field
The present invention relates to a kind of method of aluminium metallurgy, is a kind of method for aluminum production through vertical shaft kiln specifically.
Background technology
Aluminium and alloy purposes thereof are very extensive.It is a kind of light and bright metal, and in the earth's crust, the reserves of aluminium are very abundant, takes up an area of 8.13 ‰ of ball quality.Modern production from natural aluminous ore extracts metallic aluminium comprises two sections independently Industrial processes.It is that pure alumina is extracted from aluminum ore in the basis that first section flow process adopts bayer's process; Second section flow process is that aluminum oxide is obtained metallic aluminium through electrolysis.Over more than 100 year, it all is to be that the basis produces aluminum oxide by aluminum ore with the bayer's process that aluminium country is produced in the whole world, uses Hall-He Luerte electrolytic process by the alumina producing metallic aluminium again.These two sections flow processs are gone through and were used till today in more than 100 year.The drawback of Baeyer-Hall special method aluminium metallurgy in conspicuous Rule technology maximum is: can only select the fine aluminum ore for use, and the whole production flow process is tediously long, and complex process, the power consumption height, material consumption is big, the cost height.The distribution of liquid aluminium production cost is: aluminum oxide 39.0%, carbon anode 20.4%, electric energy 18.4%, labor service 15.8%, other material 6.4%.Produce one ton of metallic aluminium power consumption and reach 15000 kilowatt-hours.Assert that according to the expert bottom line of power consumption is 12300 kilowatt-hours, can not be low again.Secondly, Mineral resources are restricted, and generally only are applicable to that alchlor content is at three boehmites more than 60%.China's alum clay ore reserves is abundant, but the overwhelming majority is a diaspore, and grade is low, the foreign matter content height, and it is very difficult directly adopting producing aluminium oxide by bayer, this is China's bauxite resource " congenital defect ".Therefore, must seek new metallurgy method for aluminum.
Summary of the invention
The objective of the invention is to provides a kind of and both can adopt bauxite of high grade at the above-mentioned defective of existing aluminium metallurgy method for over 100 years more than a hundred years, can adopt low-grade bauxite to produce the method for metallic aluminium again.It is characterized in that bauxite, kaolin, nepheline or contain the material such as ore, fuel, flux, reductive agent of aluminium clay, after pulverizing, mixing, briquetting, coking, make the porous agglomerate, send into shaft furnace through 2100 ℃～2200 ℃ high temperature melting, formation comprises aluminium, silicon, iron multielement blend melt, send into purifier picked-up metallic aluminium again, iron, silicon are completely separated, just the metal aluminium liquid ingot casting can be got the metallic aluminium finished product that aluminum content reaches 99.5%-99.8%.
The invention has the beneficial effects as follows:
The first, power saving.This law aluminium metallurgy is adopted in nearly 15000 kilowatt-hours of electrolytic aluminum power consumption per ton, 1000 kilowatt-hours of small-sized shaft furnace power consumptions per ton, and large-scale aluminum production through vertical shaft kiln system burner gas residual heat power generation assembly builds up back institute electricity except that guaranteeing self electricity consumption, also can outwards export electric energy.
The second, reduce the production cost of metallic aluminium significantly.The bayer's process of complex process or the technology that sintering process is produced aluminum oxide have at first been saved; Secondly without electrolytic process, there is not the huge loss of anode carbon material yet.
The 3rd, changed the situation that traditional aluminium metallurgy technology can only adopt high-quality bauxite, expanded bauxite resource.Every Al that contains
2O
3Kaolin more than 30%, feldspar, clay, nepheline, coal ash etc. all can be gone into the stove aluminium metallurgy.All iron content, the bauxite that sulfur content is high also can be gone into aluminum production through vertical shaft kiln.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
Now set forth concrete metallurgy method for aluminum of the present invention in conjunction with the accompanying drawings.
At first make up the furnace charge compounding system, its task is with bauxite, kaolin, nepheline, contains ore, fuel, flux, reductive agent (CO, the Hs of all trioxygen-containingization two aluminium more than 30% such as aluminium clay, cinder
2, C) after pulverize mixing stirring, briquetting, coking, make the porous pelletizing.
Next is the shaft furnace that makes up small-sized, medium-sized, large-scale different aluminium metallurgy scales.The shaft furnace shell rolls with steel plate and is welded, and furnace lining is made by the refractory materials of 2500 ℃ of refractoriness, and the shaft furnace bottom is equipped with the purifier of corresponding scale.The furnace charge of furnace charge compounding system is sent into shaft furnace through 2100 ℃～2200 ℃ high temperature melting, and reduction obtains containing the blend melt of aluminium, iron, silicon multielement, and wherein crude aluminum content is 50～60%.Again the multielement blend melt is sent into purifier and separate,, promptly get aluminum content and reach 99.5%～99.8% finished product the metal aluminium liquid ingot casting of separating.
The recyclable utilization of white residue, scum that the process purifier is separated; Its furnace gas temperature still has 500 ℃ can establish the device for generating power by waste heat comprehensive utilization.
Claims (1)
1, a kind of method for aluminum production through vertical shaft kiln, comprise the steps: earlier bauxite, fuel, flux, reductive agent is through pulverizing, mix and stir, briquetting, make the porous agglomerate after the coking, send into shaft furnace through 2100 ℃ of-2200 ℃ of high temperature melting, reduction, formation contains aluminium, iron, silicon multielement blend melt, it is characterized in that, be equipped with and the corresponding purifier of aluminium metallurgy scale in the shaft furnace bottom, to contain aluminium, iron, silicon multielement blend melt is sent into purifier and is carried out the refining separation, aluminium is separated from blend melt, just can get refined aluminium liquid, again with its ingot casting, cooling gets final product to such an extent that aluminum content reaches 99.5%～99.8% metallic aluminium product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610031859A CN100582263C (en) | 2006-06-19 | 2006-06-19 | Method for aluminum production through vertical shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610031859A CN100582263C (en) | 2006-06-19 | 2006-06-19 | Method for aluminum production through vertical shaft kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101092667A CN101092667A (en) | 2007-12-26 |
| CN100582263C true CN100582263C (en) | 2010-01-20 |
Family
ID=38991100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610031859A Expired - Fee Related CN100582263C (en) | 2006-06-19 | 2006-06-19 | Method for aluminum production through vertical shaft kiln |
Country Status (1)
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| CN (1) | CN100582263C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268694A (en) * | 2011-08-13 | 2011-12-07 | 祝向辉 | Manufacturing method for aluminum ingot hardly prone to generating acicular aluminum-iron-silicon impurity phase |
| CN102277594A (en) * | 2011-08-13 | 2011-12-14 | 祝向辉 | Manufacturing method of aluminum ingot being less prone to producing needle-like beta-AlFeSi impurity phase |
-
2006
- 2006-06-19 CN CN200610031859A patent/CN100582263C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 轻金属冶金学. 杨重愚，213-216，冶金工业出版社. 1991 |
| 轻金属冶金学. 杨重愚，213-216，冶金工业出版社. 1991 * |
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| Publication number | Publication date |
|---|---|
| CN101092667A (en) | 2007-12-26 |
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