CN103966453A - Method for producing premelting-type calcium aluminate from electrolytic aluminum waste residue - Google Patents
Method for producing premelting-type calcium aluminate from electrolytic aluminum waste residue Download PDFInfo
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- CN103966453A CN103966453A CN201310035570.XA CN201310035570A CN103966453A CN 103966453 A CN103966453 A CN 103966453A CN 201310035570 A CN201310035570 A CN 201310035570A CN 103966453 A CN103966453 A CN 103966453A
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- calcium aluminate
- type calcium
- waste slag
- electrolytic aluminium
- waste residue
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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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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a method for producing premelting-type calcium aluminate from electrolytic aluminum waste residue. The method comprises the following steps of 1, purifying electrolytic aluminum waste residue, 2, mixing the purified electrolytic aluminum waste residue and lime, 3, putting the raw material into a melting furnace and carrying out melting, 4, discharging the melt product into a high temperature-resistant melting tank and carrying out cooling, and 5, crushing the cooled premelting-type calcium aluminate, carrying out screening and carrying out packaging. The method utilizes electrolytic aluminum waste residue and limestone to prepare the premelting-type calcium aluminate, realizes recycle of waste, is environmentally friendly, saves energy, prevents aluminum resource loss, reduces a calcium aluminate cost and reduces environmental pollution. The calcium aluminate produced by the method has the characteristics of less impurity and uniform and stable components, can be used for the refining process of LF, SKF and VHP and can greatly improve molten steel quality and a ladle service life.
Description
Technical field
The present invention relates to field of metallurgy, specifically utilize waste slag of electrolytic aluminium to produce the method for preliminary melting type calcium aluminate.
Background technology
In metallurgy industry, calcium aluminate is main cleaning molten steel materials, traditional calcium aluminate is to obtain as main raw material after chemical reaction preparation with lime powder and bauxitic clay, this traditional making method, the main bauxitic clay that adopts, consumption of natural resource is larger, and cost compare is high, along with continually developing of Mineral resources, the reserves of bauxitic clay, reducing gradually, are restricting the development of industry.And in the process of electrolytic aluminum, waste slag of electrolytic aluminium (tankage) is inevitable byproduct, and in these byproducts, still contain a large amount of aluminium slags, if by discarded useless aluminium ash, it is a kind of waste of very large resource, and this electrolytic aluminum ash also can cause the pollution of environment, in today of current advocating environment protection green, be obviously not meet very much era development.
Summary of the invention
In order to address the above problem, the invention provides a kind of method of utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate, technique adopts waste slag of electrolytic aluminium (tankage) and Wingdale to produce preliminary melting type calcium aluminate, refuse reclamation, environmental protection and energy saving, prevent that bauxite resource runs off, reduction calcium aluminate cost, reduces environmental pollution.Pass through the calcium aluminate that this production method is produced, reach the object of cleaning molten steel.Product has the features such as impurity is few, composition is uniform and stable, is applied to LF, SKF, and the refining processs such as VHP, can increase substantially steel quality and ladle work-ing life.
The present invention is achieved in that
Utilize waste slag of electrolytic aluminium to produce a method for preliminary melting type calcium aluminate, it is characterized in that, described method comprises the steps:
1) feedstock purification: waste slag of electrolytic aluminium is purified;
2) batch mixing: waste slag of electrolytic aluminium and lime after purifying are mixed, and blending ratio is: waste slag of electrolytic aluminium 30 ~ 50%, Wingdale 50 ~ 70%;
3) smelt: raw material is put into smelting furnace, according to product requirement and setting voltage and electric current carry out melting;
4) product after fusing is banished, put in high temperature resistant molten bath cooling;
5) cooled preliminary melting type calcium aluminate fragmentation, screening, dress bag.
Preferably, in smelting process, described voltage is 160-220v.Described voltage is according to the different differences that require of the characteristic of product, and also, product performance requires different electric current, and its needed electric current is also different, and the difference of the amount of each smelting, and its size of current is also different.
Preferably, Al in the waste slag of electrolytic aluminium after purification
2o
3content > 60%, the content > 15%. of AlF
Preferably, the content >92% of Cao in described lime.
Calcium component in preliminary melting type calcium aluminate prepared by the present invention can with molten steel in oxygen, reaction of Salmon-Saxl generate low melting point, the easy product of floating, reach the object of cleaning molten steel, have the following advantages:
1, impurity is few, and composition is uniform and stable, is applied to the refining processs such as LF, SKF, VHP, can increase substantially steel quality and ladle work-ing life;
2, sweetening effectiveness is obvious, in the situation that original sulphur 0.027% is lower, can realize the effect of some sulphur 0.005%, and desulfurization degree reaches more than 80%;
3, desulfurization rate is fast, and stable, and can effectively suppress rephosphorization;
4, slag Minerals fusing point low (fusing point≤1350 DEG C). burn-off rate can shorten the smelting time soon, and slagging is fast, can reduce dust pollution;
5, alleviate the erosion to ladle furnace lining, can improve the provide protection to ladle furnace lining;
6, the inclusion in can active adsorption molten steel, has certain deoxidation and deoxidisation, is conducive to molten steel purifying;
7, the preliminary melting type calcium aluminate that adopts present method to prepare does not absorb water, and is convenient to store and transport.
Embodiment
Below in conjunction with specific embodiment, the present invention is done further and described, but specific embodiment does not do any restriction to the present invention.
Embodiment 1:
A kind of method of utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate that the present embodiment provides, comprises the steps:
1) feedstock purification: waste slag of electrolytic aluminium is purified, remove some foreign material, Al in the waste slag of electrolytic aluminium after purification
2o
3content > 60%, the content > 15% of AlF;
2) batch mixing: waste slag of electrolytic aluminium and lime after purifying are mixed, and blending ratio is: waste slag of electrolytic aluminium 30%, Wingdale 70%, wherein the content >92% of Cao in Wingdale;
3) smelt: raw material is put into smelting furnace and carry out melting, setting voltage is 160v, electric current according to the amount that adds materials number set;
4) product after fusing is banished, put in high temperature resistant molten bath cooling;
5) cooled preliminary melting type calcium aluminate fragmentation, screening, dress bag.
Embodiment 2:
A kind of method of utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate that the present embodiment provides, comprises the steps:
1) feedstock purification: waste slag of electrolytic aluminium is purified, remove some foreign material, Al in the waste slag of electrolytic aluminium after purification
2o
3content > 60%, the content > 15% of AlF;
2) batch mixing: waste slag of electrolytic aluminium and lime after purifying are mixed, and blending ratio is: waste slag of electrolytic aluminium 50%, Wingdale 50%, wherein the content >92% of Cao in Wingdale;
3) smelt: raw material is put into smelting furnace and carry out melting, setting voltage is 220v, electric current according to the amount that adds materials number set;
4) product after fusing is banished, put in high temperature resistant molten bath cooling;
5) cooled preliminary melting type calcium aluminate fragmentation, screening, dress bag.
Embodiment 3:
A kind of method of utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate that the present embodiment provides, comprises the steps:
1) feedstock purification: waste slag of electrolytic aluminium is purified, remove some foreign material, Al in the waste slag of electrolytic aluminium after purification
2o
3content > 60%, the content > 15% of AlF;
2) batch mixing: waste slag of electrolytic aluminium and lime after purifying are mixed, and blending ratio is: waste slag of electrolytic aluminium 40%, Wingdale 60%, wherein the content >92% of Cao in Wingdale;
3) smelt: raw material is put into smelting furnace and carry out melting, setting voltage is 200v, electric current according to the amount that adds materials number set;
4) product after fusing is banished, put in high temperature resistant molten bath cooling;
5) cooled preliminary melting type calcium aluminate fragmentation, screening, dress bag.
Claims (4)
1. utilize waste slag of electrolytic aluminium to produce a method for preliminary melting type calcium aluminate, it is characterized in that, described method comprises the steps:
1) feedstock purification: waste slag of electrolytic aluminium is purified;
2) batch mixing: waste slag of electrolytic aluminium and lime after purifying are mixed, and blending ratio is: waste slag of electrolytic aluminium 30～50%, Wingdale 50～70%;
3) smelt: raw material is put into smelting furnace, according to product requirement and setting voltage and electric current carry out melting;
4) product after fusing is banished, put in high temperature resistant molten bath cooling;
5) cooled preliminary melting type calcium aluminate fragmentation, screening, dress bag.
2. the method for utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate as claimed in claim 1, is characterized in that, in smelting process, described voltage is 160-220v.
3. the method for utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate as claimed in claim 1, is characterized in that Al in the waste slag of electrolytic aluminium after purification
2o
3content >60%, the content >15% of AlF.
4. the method for utilizing waste slag of electrolytic aluminium to produce preliminary melting type calcium aluminate as claimed in claim 1, is characterized in that the content >92% of Cao in described Wingdale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035570.XA CN103966453A (en) | 2013-01-30 | 2013-01-30 | Method for producing premelting-type calcium aluminate from electrolytic aluminum waste residue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310035570.XA CN103966453A (en) | 2013-01-30 | 2013-01-30 | Method for producing premelting-type calcium aluminate from electrolytic aluminum waste residue |
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| CN103966453A true CN103966453A (en) | 2014-08-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531954A (en) * | 2015-01-16 | 2015-04-22 | 新疆八一钢铁股份有限公司 | Production technology of molten aluminum killed steel cleaning agent |
| CN107201424A (en) * | 2017-06-15 | 2017-09-26 | 王强 | The technique that a kind of utilization electrolytic aluminium factory aluminium cell slag from delining produces deoxidizer in steel production |
| CN107848826A (en) * | 2015-07-15 | 2018-03-27 | 克内奥斯公司 | method for manufacturing calcium aluminate |
| CN110106312A (en) * | 2019-03-19 | 2019-08-09 | 新疆中合大正冶金科技有限公司 | A kind of technique using electrolytic aluminium carbon slag production LF slagging agent |
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|---|---|---|---|---|
| CN1201072A (en) * | 1998-04-07 | 1998-12-09 | 幸超 | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same |
| CN101503747A (en) * | 2009-03-12 | 2009-08-12 | 浙江杭美炉料制造有限公司 | Heating steel slag washing material for converter steel melting, preparation and use method |
| CN101550471A (en) * | 2009-05-14 | 2009-10-07 | 张延大 | Method utilizing nonferrous metal production waste to prepare calcium aluminate used for metallurgy |
| CN102161491A (en) * | 2011-03-16 | 2011-08-24 | 攀钢冶金材料有限责任公司 | Preparation method of pre-melted calcium aluminum for steel making |
| CN102602970A (en) * | 2012-03-15 | 2012-07-25 | 福州大学 | Calcium hexaluminate prepared by aid of anodic oxidation waste residues of aluminum section factory and method for preparing calcium hexaluminate |
-
2013
- 2013-01-30 CN CN201310035570.XA patent/CN103966453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201072A (en) * | 1998-04-07 | 1998-12-09 | 幸超 | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same |
| CN101503747A (en) * | 2009-03-12 | 2009-08-12 | 浙江杭美炉料制造有限公司 | Heating steel slag washing material for converter steel melting, preparation and use method |
| CN101550471A (en) * | 2009-05-14 | 2009-10-07 | 张延大 | Method utilizing nonferrous metal production waste to prepare calcium aluminate used for metallurgy |
| CN102161491A (en) * | 2011-03-16 | 2011-08-24 | 攀钢冶金材料有限责任公司 | Preparation method of pre-melted calcium aluminum for steel making |
| CN102602970A (en) * | 2012-03-15 | 2012-07-25 | 福州大学 | Calcium hexaluminate prepared by aid of anodic oxidation waste residues of aluminum section factory and method for preparing calcium hexaluminate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531954A (en) * | 2015-01-16 | 2015-04-22 | 新疆八一钢铁股份有限公司 | Production technology of molten aluminum killed steel cleaning agent |
| CN107848826A (en) * | 2015-07-15 | 2018-03-27 | 克内奥斯公司 | method for manufacturing calcium aluminate |
| CN107201424A (en) * | 2017-06-15 | 2017-09-26 | 王强 | The technique that a kind of utilization electrolytic aluminium factory aluminium cell slag from delining produces deoxidizer in steel production |
| CN110106312A (en) * | 2019-03-19 | 2019-08-09 | 新疆中合大正冶金科技有限公司 | A kind of technique using electrolytic aluminium carbon slag production LF slagging agent |
| CN110106312B (en) * | 2019-03-19 | 2020-11-10 | 新疆中合大正冶金科技有限公司 | Process for producing LF (ladle furnace) slagging agent by using electrolytic aluminum carbon slag |
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Application publication date: 20140806 |