CN103255438A - Preparation method of modified pre-baked carbon anode containing titanium additive - Google Patents
Preparation method of modified pre-baked carbon anode containing titanium additive Download PDFInfo
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- CN103255438A CN103255438A CN2013101974783A CN201310197478A CN103255438A CN 103255438 A CN103255438 A CN 103255438A CN 2013101974783 A CN2013101974783 A CN 2013101974783A CN 201310197478 A CN201310197478 A CN 201310197478A CN 103255438 A CN103255438 A CN 103255438A
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Abstract
The invention discloses a preparation method of a modified pre-baked carbon anode containing a titanium additive. The preparation method comprises the following steps of: with a compound containing titanium (the content is 0.05-1.5%) as the additive, mixing and kneading the additive with calcined coke as carbon anode aggregate; meanwhile, adding asphalt; adding the mixture into a moulding machine to press and mould, so as to prepare a modified raw pre-baked carbon anode block; and placing the modified raw pre-baked carbon anode block in a roasting furnace to be roasted to prepare the modified pre-baked carbon anode. The modified pre-baked carbon anode prepared by the method disclosed by the invention is good in anti-oxidant performance, and the carbon consumption can be reduced by about 45Kg/ton anode. The additive is low in cost, and the used TiO2/TiC not only serves as the modified additive for the carbon anode, but also is one of impurity elements in the carbon anode. Titanium is superior to aluminum in an electrolysis process and can be electrolyzed to prepare aluminum-titanium alloy. Titanium element is not accumulated and has no adverse effect on the electrolysis process. An existing process is less in modification and the method can be used for industrial production.
Description
Technical field
The present invention relates to the technical field of aluminum electrolysis in the Non-ferrous Metallurgy, particularly relate to the preparation method of the carbon anode in a kind of prd-baked Al electrolysis production.
Background technology
Carbon anode not only imports the burner hearth of electrolyzer to electric current as conductive electrode as the topmost integral part of electrolyzer, but also will participate in the electrochemical process of alumina eltrolysis.In Aluminum Electrolysis Production, the most effective criterion of carbon anode quality difference is performance in the use in electrolysis production, the quality of carbon anode quality seriously has influence on current efficiency and the anode consumption of Aluminium Electrolysis operation, electrolyzer, so the high-quality carbon anode is the prerequisite of modern large-current electric solution groove optimum operation.The consumption of carbon anode is made up of electrochemistry consumption and luxus consumption in the electrolytic aluminum process, and luxus consumption comprises the consumption of carbon anode air reaction, carbon anode and CO
2Cloth Dorr reaction consumes, electrolysis of aluminum side-reaction consumes and part fall slag etc.In the carbon anode quality factor, the resistance of oxidation of carbon anode is that air reactive and carbon dioxide reaction are bigger to the influence of carbon anode quality.
Summary of the invention
The purpose of this invention is to provide a kind of modification pre-baked carbon anode preparation method with Ti-containing additive improving the oxidation-resistance of carbon anode, and reduce anode and use the charcoal consumption.
This modification pre-baked carbon anode preparation method with Ti-containing additive of the present invention is to be additive with the titanium-containing compound, with as the carbon anode aggregate forge that the back is burnt evenly mixes, be prepared into the modification pre-baked carbon anode after the roasting.Aforesaid titanium-containing compound is TiO
2Or one or more the combination among the TiC.Wherein, this method also comprises the steps:
1) additive raw material is mixed also preheating with the carbon anode aggregate, preheating temperature is 150～165 ℃;
2) compound of additive and carbon anode aggregate is mixed pinch, add pitch simultaneously, wherein mixture temperature is 160～180 ℃, and mixing the time of pinching is 10～30 minutes;
3) batch mixing is added shaper compression moulding, make the modification pre-baking carbon anode block;
4) the modification prebaked anode that previous step is obtained is given birth to piece and is placed the roasting kiln roasting, and the sinter process parameter is as follows: 15 ℃/h of temperature rise rate, and 1050 ℃ of the highest sample temperatures, 1150 ℃ of gas temperatures, soaking time 8h, sample slowly cools off.
Further, the weight percent content of titaniferous element additive in compound is 0.05～1.5%, wherein TiO
2Dosage is 0.5～15Kg/ ton anode, and the TiC dosage is 0.39～11.63Kg/ ton anode.
Advantage of the present invention is: the antioxidant property of modification prebaked anode is good, can reduce the charcoal consumption
45About Kg/ ton anode.The additive cost is low, used TiO
2/ TiC is the property-modifying additive of carbon anode, also is one of impurity element in the carbon anode simultaneously, and titanium has precedence over electrolysis of aluminum, but electrolytic preparation goes out aluminum titanium alloy, and titanium elements is not accumulated, and electrolytic process is had no adverse effects, less to existing technology change, can be used for industrial production.Additive applied widely is not subjected to the restriction of grooved, existing technology is changed less, better with existing processing compatibility, have popularizing application prospect widely.
Embodiment
Be described in further detail below in conjunction with the present invention of embodiment.
One embodiment of the present of invention are as follows:
1, additive formulations calculates
With additive level in the preparation modification prebaked anode by the 1.0%(weight percent) be calculated as example, then: the TiO of interpolation
2Dosage 10Kg/ ton anode, or TiC dosage 7.75Kg/ ton anode.Same method of calculation, if the additive level in the modification prebaked anode of preparation by 0.05%, 0.5%, the 1.5%(weight percent) calculate, then required additive capacity is listed in table 1.
2, modification pre-baked carbon anode preparation method
1. additive raw material is mixed and preheating preheating temperature: 150～165 ℃ with the carbon anode aggregate;
2. the compound of additive and carbon anode aggregate is mixed and pinch, add pitch, mixture temperature simultaneously: 160～180 ℃; Mix and pinch the time: 10～30 minutes;
3. batch mixing is added shaper compression moulding, make the modification pre-baking carbon anode block;
4. the modification prebaked anode is given birth to piece and place the roasting kiln roasting, the sinter process parameter is as follows: 15 ℃/h of temperature rise rate, and 1050 ℃ of the highest sample temperatures, 1150 ℃ of gas temperatures, soaking time 8h, sample slowly cools off.
3, modification pre-baked carbon anode performance index
Table 2 is the reactive performance index of modification pre-baked carbon anode of the present invention, and compares with the carbon anode of same recipe (not doping).Calculation result shows: the modification carbon anode is at CO
2The remaining rate of middle reaction increases 2.9-16.52%, and the remaining rate of reaction increases 6.3-17.56% in air, and charcoal consumes can reduce 14.38-54.41Kg/ ton anode.
Certainly, be the concrete exemplary applications of invention more than, the present invention also has other embodiment, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the protection domain of the presently claimed invention.
Claims (4)
1. modification pre-baked carbon anode preparation method with Ti-containing additive is characterized in that: be additive with the titanium-containing compound, with as the carbon anode aggregate forge that the back is burnt evenly mixes, be prepared into the modification pre-baked carbon anode after the roasting.
2. the modification pre-baked carbon anode preparation method with Ti-containing additive according to claim 1, it is characterized in that: described titanium-containing compound is TiO
2Or one or more the combination among the TiC.
3. the modification pre-baked carbon anode preparation method with Ti-containing additive according to claim 2 is characterized in that this method also comprises the steps:
1) additive raw material is mixed also preheating with the carbon anode aggregate, preheating temperature is 150～165 ℃;
2) compound of additive and carbon anode aggregate is mixed pinch, add pitch simultaneously, wherein mixture temperature is 160～180 ℃, and mixing the time of pinching is 10～30 minutes;
3) batch mixing is added shaper compression moulding, make the modification pre-baking carbon anode block;
4) the modification prebaked anode that previous step is obtained is given birth to piece and is placed the roasting kiln roasting, and the sinter process parameter is as follows: 15 ℃/h of temperature rise rate, and 1050 ℃ of the highest sample temperatures, 1150 ℃ of gas temperatures, soaking time 8h, sample slowly cools off.
4. according to claim 2 or 3 described modification pre-baked carbon anode preparation methods with Ti-containing additive, it is characterized in that: the weight percent content of titaniferous element additive in compound is 0.05～1.5%, wherein TiO
2Dosage is 0.5～15Kg/ ton anode, and the TiC dosage is 0.39～11.63Kg/ ton anode.
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| CN2013101974783A CN103255438A (en) | 2013-05-24 | 2013-05-24 | Preparation method of modified pre-baked carbon anode containing titanium additive |
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| CN2013101974783A CN103255438A (en) | 2013-05-24 | 2013-05-24 | Preparation method of modified pre-baked carbon anode containing titanium additive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952721A (en) * | 2014-04-21 | 2014-07-30 | 西安建筑科技大学 | Semi-coke base carbon anode for aluminum electrolysis and preparation method thereof |
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| CN1376813A (en) * | 2001-12-28 | 2002-10-30 | 郑州轻金属研究院 | Process for preparing AlTi alloy by direct electrolysis with carbon anode containing titanium oxide |
| CN1621565A (en) * | 2003-11-28 | 2005-06-01 | 中南大学 | Modified prebaked carbon anode for aluminum electrolysis and preparation method thereof |
| CN1712571A (en) * | 2005-05-08 | 2005-12-28 | 北京科技大学 | Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis |
| CN101922022A (en) * | 2010-08-03 | 2010-12-22 | 湖南晟通科技集团有限公司 | Method for reducing resistivity of prebaked anode |
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2013
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Patent Citations (4)
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|---|---|---|---|---|
| CN1376813A (en) * | 2001-12-28 | 2002-10-30 | 郑州轻金属研究院 | Process for preparing AlTi alloy by direct electrolysis with carbon anode containing titanium oxide |
| CN1621565A (en) * | 2003-11-28 | 2005-06-01 | 中南大学 | Modified prebaked carbon anode for aluminum electrolysis and preparation method thereof |
| CN1712571A (en) * | 2005-05-08 | 2005-12-28 | 北京科技大学 | Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis |
| CN101922022A (en) * | 2010-08-03 | 2010-12-22 | 湖南晟通科技集团有限公司 | Method for reducing resistivity of prebaked anode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103952721A (en) * | 2014-04-21 | 2014-07-30 | 西安建筑科技大学 | Semi-coke base carbon anode for aluminum electrolysis and preparation method thereof |
| CN103952721B (en) * | 2014-04-21 | 2016-04-13 | 西安建筑科技大学 | A kind of blue charcoal base carbon anode used for aluminium electrolysis and preparation method thereof |
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Application publication date: 20130821 |