CN102765738A - Amorphous calcium aluminate and preparation method thereof - Google Patents
Amorphous calcium aluminate and preparation method thereof Download PDFInfo
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- CN102765738A CN102765738A CN2012101800109A CN201210180010A CN102765738A CN 102765738 A CN102765738 A CN 102765738A CN 2012101800109 A CN2012101800109 A CN 2012101800109A CN 201210180010 A CN201210180010 A CN 201210180010A CN 102765738 A CN102765738 A CN 102765738A
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- calcium aluminate
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Abstract
The invention discloses an amorphous calcium aluminate, which can be used in both steelmaking industry and cement additive industry. The invention also discloses a preparation method of the amorphous calcium aluminate. The method comprises the steps of: raw material selection, mixing, smelting by a furnace, tapping, cooling and pelletization. The cooling step is carried out for a while, starting from a certain temperature, to form the amorphous calcium aluminate; and the certain temperature is optimally to be 2000 DEG C.
Description
Invention field
The present invention relates to a kind of calcium aluminate, relate in particular to a kind of noncrystalline calcium aluminate and preparation method thereof.
Background technology
Calcium aluminate is metallurgical and the new a kind of material that rises of building materials field, and main chemical compositions is Al2O3 and CaO.Traditional calcium aluminate is generally black or xanchromatic crystallization calcium aluminate, is divided into cement additire by purposes and uses and make steel with two big types, and can not be used in steel-making industry and cement additire industry simultaneously.Common crystallization calcium aluminate is used in steel-making during industry, has that the ferrous materials fusing point is high, burn-off rate is slow, refining time is long and shortcoming such as refining energy consumption height.
Therefore a kind of industry that both can be used for making steel need be provided, can overcome the shortcoming of common crystallization calcium aluminate, also can be used for the calcium aluminate of cement additire industry in the steel-making industry.
Summary of the invention
For this reason, the present invention proposes a kind of noncrystalline calcium aluminate that at least partly addresses the above problem that can address the above problem and preparation method thereof.
According to an aspect of the present invention, a kind of calcium aluminate is provided, has comprised the CaO of weight percent component 40-60%, the Al of 30-60%
2O
3, the S of 0.01-1%, the SiO of 1-10%
2, 0.05-3% Fe
2O
3, 0.01-5% CaF
2, the MgO of 1-10%, the TiO of 0-3%
2With the P of 0.01-1%, wherein said calcium aluminate is noncrystalline calcium aluminate.
According to another aspect of the present invention; The preparation method of above-mentioned calcium aluminate is provided, has comprised step: starting material are selected, batching, electrosmelting, come out of the stove, cool off and make the abrasive particle powder, and wherein said cooling step is for to begin from certain temperature; Cooling for some time, form noncrystalline calcium aluminate.
Alternatively, the preparation method according to calcium aluminate of the present invention wherein begins from certain temperature at cooling step, cooling for some time, form noncrystalline calcium aluminate, and the optimum temps of said certain temperature is 2000 degree.
Alternatively; Preparing method according to calcium aluminate of the present invention; Wherein in batching step, can adjust batching according to purposes or index; The optimum temps of in the step of electrosmelting, smelting is 2000 degree, in the step of coming out of the stove, needs to regulate flow and flow velocity, in system abrasive particle powder step, will adjust specific surface area according to purposes.
The calcium aluminate that obtains prepared according to the methods of the invention both can be used for making steel industry, can be used for the cement additire industry again.When being used to make steel industry, and use common crystallization calcium aluminate to compare, the fusing point step-down of ferrous materials, burn-off rate accelerate; Therefore shortened the iron and steel purified time; Reduced the refining power consumption, practiced thrift cost, noncrystalline calcium aluminate also has the effect of carbon-free thermal insulation agent in steelmaking process simultaneously.When being used for the cement additire industry, can change cement setting speed, improve cement mark, refinforced cement intensity, and after calcium aluminate added cement by a certain percentage, the cement that obtains can be used as plugging agent and nuclear waste disposal agent.
Description of drawings
Through reading the hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing only is used to illustrate the purpose of preferred implementation, and does not think limitation of the present invention.
Fig. 1 shows the preparation method according to the noncrystalline calcium aluminate of an embodiment of the invention
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the present invention is done further description.
Fig. 1 shows the preparation method according to the noncrystalline calcium aluminate of an embodiment of the invention.According to present method, selected starting material in step S1100 at first; In step S1200 step, selected starting material are prepared burden in proportion then; In the S1300 step, confected materials is carried out electrosmelting afterwards; Next in the S1400 step, will smelt good raw material comes out of the stove; The raw material of in the S1500 step, will coming out of the stove afterwards cools off, and forms amorphous calcium aluminate; The last noncrystalline calcium aluminate system abrasive particle powder operation that in the S1600 step, will obtain.The S1600 step finishes, and the preparation of noncrystalline calcium aluminate is accomplished.
Embodiment
In the present embodiment, at first getting into the S1100 step carries out selected to the raw material of needs; Then the selected raw material that obtains is got into the S1200 step, proportion of raw materials can be adjusted according to purposes and index in this step, has selected the CaO of following proportioning raw materials: 40-60%, the Al of 30-60% in the present embodiment for use
2O
3, the S of 0.01-1%, the SiO of 1-10%
2, 0.05-3% Fe
2O
3, 0.01-5% CaF
2, the MgO of 1-10%, the TiO of 0-3%
2P with 0.01-1%; Afterwards confected materials is carried out the electrosmelting operation of step S1300, smelting temperature reaches 2000 degree; Next carry out the step of coming out of the stove of S1400, in the process of coming out of the stove flow and flow velocity are adjusted; Having got into the crucial S1500 step of the present invention after coming out of the stove, is 2000 degree beginnings from temperature, carries out cooling forming, and in this step, the adjustment time cools off, and process of cooling has been destroyed the crystallization condition of calcium aluminate, thereby has formed noncrystalline calcium aluminate; The noncrystalline calcium aluminate that will obtain at last carries out the system abrasive particle powder operation of step S1600, in this step, has adjusted the particulate specific surface area according to purposes, and having obtained granularity is the calcium aluminate powder of 0-30mm.
The calcium aluminate powder that will prepare according to present embodiment has been used for the steel-making industry, finds and compares with common crystallization calcium aluminate; The fusing point step-down of ferrous materials, burn-off rate accelerate; Therefore shorten the refining time of iron and steel, reduced iron and steel purified energy consumption, meanwhile; In steelmaking process, calcium aluminate has also played the effect of carbon-free thermal insulation agent.The calcium aluminate powder that in addition present embodiment is prepared is used for the preparation of cement as cement additire; Find with noncrystalline calcium aluminate of the present invention as additive after; Can not only change rate of set, raising cement mark, the refinforced cement intensity of cement; Can also be after calcium aluminate being joined in proportion the cement the inside, obtaining can be as the cement of plugging agent and nuclear waste disposal agent.Therefore the noncrystalline calcium aluminate that utilizes present method to prepare both can be used to make steel industry, also can be used for the cement additire industry, and had overcome traditional crystallization calcium aluminate and be used to make steel the defective of industry.
It should be noted that the present invention will be described rather than limit the invention for the foregoing description, and those skilled in the art can design alternative embodiment under the situation of the scope that does not break away from accompanying claims.Word " comprises " not to be got rid of existence and is not listed in component or step in the claim.
Claims (7)
1. a calcium aluminate comprises the CaO of weight percent component 40-60%, the Al of 30-60%
2O
3, the S of 0.01-1%, the SiO of 1-10%
2, 0.05-3% Fe
2O
3, 0.01-5% CaF
2, the MgO of 1-10%, the TiO of 0-3%
2With the P of 0.01-1%, wherein said calcium aluminate is noncrystalline calcium aluminate.
2. the preparation method of a calcium aluminate as claimed in claim 1; Comprise step: starting material are selected, batching, electrosmelting, come out of the stove, cool off and make the abrasive particle powder; Wherein said cooling step cooling for some time, forms noncrystalline calcium aluminate for to begin from certain temperature.
3. the preparation method of calcium aluminate as claimed in claim 2, wherein at cooling step for to begin from certain temperature, cooling for some time, form noncrystalline calcium aluminate, the optimum temps of said certain temperature is 2000 degree.
4. like the preparation method of the arbitrary described calcium aluminate of claim 2-3, wherein in batching step, can adjust batching according to purposes or index.
5. like the preparation method of the arbitrary described calcium aluminate of claim 2-4, wherein in the step of electrosmelting, the optimum temps of smelting is 2000 degree.
6. like the preparation method of the arbitrary described calcium aluminate of claim 2-5, wherein in the step of coming out of the stove, need to regulate flow and flow velocity.
7. like the preparation method of the arbitrary described calcium aluminate of claim 2-6, wherein in system abrasive particle powder step, to adjust specific surface area according to purposes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173525A1 (en) | 2014-05-16 | 2015-11-19 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate |
| WO2015173526A1 (en) | 2014-05-16 | 2015-11-19 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate comprising a surface treatment |
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| JP2002274842A (en) * | 2001-03-15 | 2002-09-25 | Kotegawa Sangyo Kk | Method of preparing amorphous calcium aluminate hydrate |
| CN101172635A (en) * | 2007-11-29 | 2008-05-07 | 上海交通大学 | Method for producing calcium aluminate with waste aluminum gray |
| US20090246523A1 (en) * | 2008-03-28 | 2009-10-01 | Shizhong Jason Zhao | Small Diameter Calcium Aluminate Based Catalyst Supports by Extrusion and Pelletizing |
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|---|---|---|---|---|
| JP2002274842A (en) * | 2001-03-15 | 2002-09-25 | Kotegawa Sangyo Kk | Method of preparing amorphous calcium aluminate hydrate |
| CN101172635A (en) * | 2007-11-29 | 2008-05-07 | 上海交通大学 | Method for producing calcium aluminate with waste aluminum gray |
| US20090246523A1 (en) * | 2008-03-28 | 2009-10-01 | Shizhong Jason Zhao | Small Diameter Calcium Aluminate Based Catalyst Supports by Extrusion and Pelletizing |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173525A1 (en) | 2014-05-16 | 2015-11-19 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate |
| WO2015173526A1 (en) | 2014-05-16 | 2015-11-19 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate comprising a surface treatment |
| FR3021046A1 (en) * | 2014-05-16 | 2015-11-20 | Kerneos | ULTRA-RAPID CEMENT WITH AMORPHOUS CALCIUM ALUMINATE COMPRISING SURFACE TREATMENT |
| FR3021047A1 (en) * | 2014-05-16 | 2015-11-20 | Kerneos | ULTRA-RAPID CEMENT WITH AMORPHOUS CALCIUM ALUMINATE |
| CN106470957A (en) * | 2014-05-16 | 2017-03-01 | 克内奥斯公司 | Super-fast-setting cement based on noncrystalline calcium aluminate |
| US20170088465A1 (en) * | 2014-05-16 | 2017-03-30 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate |
| US20170113970A1 (en) * | 2014-05-16 | 2017-04-27 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate comprising a surface treatment |
| CN106660879A (en) * | 2014-05-16 | 2017-05-10 | 克内奥斯公司 | Ultra-fast setting cement based on amorphous calcium aluminate comprising a surface treatment |
| US10196306B2 (en) | 2014-05-16 | 2019-02-05 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate |
| US10221098B2 (en) | 2014-05-16 | 2019-03-05 | Kerneos | Ultra-fast setting cement based on amorphous calcium aluminate comprising a surface treatment |
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|---|---|
| CN102765738B (en) | 2015-07-22 |
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