CN103966397A - Method for producing premelting-type calcium aluminate from calcium metal slag - Google Patents
Method for producing premelting-type calcium aluminate from calcium metal slag Download PDFInfo
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- CN103966397A CN103966397A CN201310035450.XA CN201310035450A CN103966397A CN 103966397 A CN103966397 A CN 103966397A CN 201310035450 A CN201310035450 A CN 201310035450A CN 103966397 A CN103966397 A CN 103966397A
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- calcium
- metal slag
- calcium aluminate
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- lime
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Abstract
The invention discloses a method for producing premelting-type calcium aluminate from calcium metal slag. The method comprises the following steps of 1, raw material crushing and mixing: respectively mixing 40-75% of calcium metal slag, 10-30% of bauxite and 15-40% of lime, 2, electric smelting of the mixed materials in a smelting furnace, 3, cooling of the melt liquid flowing into a grinding tool, and 4, cooled calcium aluminate finished product fragmentation, screening and packaging. The method realizes production of the premelting-type calcium aluminate from recycled calcium metal slag (calcium metal leftovers) and limestone, prevents aluminum resource loss, greatly reduces a calcium aluminate production cost and reduces environmental pollution.
Description
Technical field
The present invention relates to field of metallurgy, specifically with calcium metal slag, 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 the useless ash of aluminium is discarded, 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 calcium metal slag to produce preliminary melting type calcium aluminate.Technique adopts calcium metal slag (calcium metal tankage) refuse reclamation, and Wingdale production preliminary melting type calcium aluminate, prevents that bauxite resource runs off, and greatly reduces the production cost of calcium aluminate, and environmental protection and energy saving, reduce environmental pollution.
The present invention is achieved in that
Utilize calcium metal slag to produce a method for preliminary melting type calcium aluminate, described method comprises the steps:
Utilize calcium metal slag to produce a method for calcium aluminate, described method comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40～75%, bauxitic clay 10～30%, lime 15～40%;
2) mixed material is put into smelting furnace and carry out electric smelting;
3) by fusing after liquid banish in grinding tool, carry out cooling;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
Preferably, described in described electric smelting process, voltage is 160-220v.Described voltage is according to the different differences that require of the characteristic of product, and electric current also, different if product performance requires, 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, mixed material adopts the method for short run batch feed while putting into smelting furnace, regularly after quantitative melting, banishes.
Preferably, in described calcium metal slag the content of Cao be 50 ~ 55%, Al
2o
336 ~ 45%, Cao > 92% in described lime, Al in described bauxitic clay
2o
3> 85%.
It is provided by the invention that to utilize the preliminary melting type calcium aluminate main component that method that calcium metal slag is produced preliminary melting type calcium aluminate is produced be Cao, Al
2o
3, have the following advantages:
1, the preliminary melting type calcium aluminate composition of preparation is even, slag Minerals fusing point low (≤1350 ℃). and burn-off rate is fast, can shorten the smelting time, and slagging is fast, can reduce dust pollution;
2, viscosity coefficient of dross suitably promotes slag to react with the deoxidization desulfuration between molten steel, can desulfurization rapidly, and sweetening effectiveness is stabilized in more than 60%, and can effectively suppress rephosphorization;
3, calcium aluminate can accelerate the dissolving of lime, thereby need not with fluorite, flux again, realizes floride-free steel-making, reduce environmental pollution, and lining erosion reduces;
4, the inclusion in can active adsorption molten steel, has certain deoxidation deoxidisation, has certain deoxidation and deoxidisation, is conducive to purification of molten steel;
5, the preliminary melting type calcium aluminate that adopts present method to prepare does not absorb water, and is convenient to store and transportation.
Embodiment
Below in conjunction with specific embodiment, the present invention is done further and described, but specific embodiment is not done any restriction to the present invention.
Embodiment 1:
The calcium metal slag that utilizes that the present embodiment provides is produced the method for calcium aluminate, comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40%, lime 30%, bauxitic clay 30%, wherein, in calcium metal slag the content of Cao be 50 ~ 55%, Al
2o
336 ~ 45%, Cao > 92% in described lime, Al in described bauxitic clay
2o
3> 85%;
2) mixed material is put into smelting furnace and carry out electric smelting, mixed material adopts the method for short run batch feed while putting into smelting furnace, and voltage described in electric smelting process is 160v;
3) liquid after fusing is banished and in grinding tool, carry out coolingly, regularly after quantitative melting, banish;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
Embodiment 2:
The calcium metal slag that utilizes that the present embodiment provides is produced the method for calcium aluminate, comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 75%, lime 15%, bauxitic clay 10%, wherein, in calcium metal slag the content of Cao be 50 ~ 55%, Al
2o
336 ~ 45%, Cao > 92% in described lime, Al in described bauxitic clay
2o
3> 85%;
2) mixed material is put into smelting furnace and carry out electric smelting, mixed material adopts the method for short run batch feed while putting into smelting furnace, and voltage described in electric smelting process is 220v;
3) liquid after fusing is banished and in grinding tool, carry out coolingly, regularly after quantitative melting, banish;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
Embodiment 3:
The calcium metal slag that utilizes that the present embodiment provides is produced the method for calcium aluminate, comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40%, lime 40%, bauxitic clay 20%, wherein, in calcium metal slag the content of Cao be 50 ~ 55%, Al
2o
336 ~ 45%, Cao > 92% in described lime, Al in described bauxitic clay
2o
3> 85%;
2) mixed material is put into smelting furnace and carry out electric smelting, mixed material adopts the method for short run batch feed while putting into smelting furnace, and voltage described in electric smelting process is 200v;
3) liquid after fusing is banished and in grinding tool, carry out coolingly, regularly after quantitative melting, banish;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
The technical scheme above embodiment of the present invention being provided is described in detail, applied specific case herein the principle of the embodiment of the present invention and embodiment are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the embodiment of the present invention; , for one of ordinary skill in the art, according to the embodiment of the present invention, in embodiment and range of application, all will change, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (7)
1. utilize calcium metal slag to produce a method for calcium aluminate, it is characterized in that, described method comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40～75%, bauxitic clay 10～30%, lime 15～40%;
2) mixed material is put into smelting furnace and carry out electric smelting;
3) by fusing after liquid banish in grinding tool, carry out cooling;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
2. the method for utilizing calcium metal slag to produce calcium aluminate as claimed in claim 1, is characterized in that, voltage described in electric smelting process is 160-220v.
3. the method for utilizing calcium metal slag to produce calcium aluminate as claimed in claim 1, is characterized in that, mixed material adopts the method for short run batch feed while putting into smelting furnace, regularly after quantitative melting, banishes.
4. the method for utilizing calcium metal slag to produce calcium aluminate as claimed in claim 1, is characterized in that, in described calcium metal slag the content of Cao be 50 ~ 55%, Al
2o
336 ~ 45%, Cao > 92% in described lime, Al in described bauxitic clay
2o
3> 85%.
5. the calcium metal slag that utilizes as described in one of claim 1 ~ 4 is produced the method for calcium aluminate, it is characterized in that, described method comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40%, lime 30%, bauxitic clay 30%;
2) mixed material is put into smelting furnace and carry out electric smelting;
3) by fusing after liquid banish in grinding tool, carry out cooling;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
6. the calcium metal slag that utilizes as described in one of claim 1 ~ 4 is produced the method for calcium aluminate, it is characterized in that, described method comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 75%, lime 15%, bauxitic clay 10%;
2) mixed material is put into smelting furnace and carry out electric smelting;
3) by fusing after liquid banish in grinding tool, carry out cooling;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
7. the calcium metal slag that utilizes as described in one of claim 1 ~ 4 is produced the method for calcium aluminate, it is characterized in that, described method comprises the steps:
1) raw material crushing is mixed: respectively metallic aluminium slag, lime and bauxitic clay are mixed in proportion, wherein calcium metal slag 40%, lime 40%, bauxitic clay 20%;
2) mixed material is put into smelting furnace and carry out electric smelting;
3) by fusing after liquid banish in grinding tool, carry out cooling;
4) cooled calcium aluminate finished product is through broken, screening, dress bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035450.XA CN103966397A (en) | 2013-01-30 | 2013-01-30 | Method for producing premelting-type calcium aluminate from calcium metal slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035450.XA CN103966397A (en) | 2013-01-30 | 2013-01-30 | Method for producing premelting-type calcium aluminate from calcium metal slag |
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| CN103966397A true CN103966397A (en) | 2014-08-06 |
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|---|---|---|---|
| CN201310035450.XA Pending CN103966397A (en) | 2013-01-30 | 2013-01-30 | Method for producing premelting-type calcium aluminate from calcium metal slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863406A (en) * | 2018-06-25 | 2018-11-23 | 屯留县彬烨钙合金工贸有限公司 | A kind of method of calcium metal slag production aluminate high temperature adhesives |
| CN108950141A (en) * | 2018-07-10 | 2018-12-07 | 屯留县彬烨钙合金工贸有限公司 | A kind of steel-making preparation method of pro-molten refining slag |
-
2013
- 2013-01-30 CN CN201310035450.XA patent/CN103966397A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 张延大: "合理利用资源生产铝酸钙精炼渣的研究", 《中国非金属矿工业导刊》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863406A (en) * | 2018-06-25 | 2018-11-23 | 屯留县彬烨钙合金工贸有限公司 | A kind of method of calcium metal slag production aluminate high temperature adhesives |
| CN108950141A (en) * | 2018-07-10 | 2018-12-07 | 屯留县彬烨钙合金工贸有限公司 | A kind of steel-making preparation method of pro-molten refining slag |
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Application publication date: 20140806 |