CN102765738B - Amorphous calcium aluminate and preparation method thereof - Google Patents
Amorphous calcium aluminate and preparation method thereof Download PDFInfo
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- CN102765738B CN102765738B CN201210180010.9A CN201210180010A CN102765738B CN 102765738 B CN102765738 B CN 102765738B CN 201210180010 A CN201210180010 A CN 201210180010A CN 102765738 B CN102765738 B CN 102765738B
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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, particularly relate to a kind of noncrystalline calcium aluminate and preparation method thereof.
Background technology
Calcium aluminate is a kind of material that metallurgy and building materials field newly rise, and main chemical compositions is Al2O3 and CaO.Traditional calcium aluminate is generally the crystallization calcium aluminate of black or yellow, is divided into cement additire to use and steel-making two large classes, and can not be used in steel-making industry and cement additire industry simultaneously by purposes.When common crystallization calcium aluminate is used in steel-making industry, have that ferrous materials fusing point is high, burn-off rate is slow, refining time is long and the shortcoming such as refining energy consumption height.
Therefore need to provide one both to can be used for making steel industry, the shortcoming of common crystallization calcium aluminate in steel-making industry can be overcome, also can be used for the calcium aluminate of cement additire industry.
Summary of the invention
For this reason, the present invention proposes a kind of noncrystalline calcium aluminate solved the problem at least partly that can solve the problem and preparation method thereof.
According to an aspect of the present invention, provide a kind of calcium aluminate, comprise the Al of CaO, 30-60% of weight percent composition 40-60%
2o
3, 0.01-1% the SiO of S, 1-10%
2, 0.05-3% Fe
2o
3, 0.01-5% CaF
2, 1-10% the TiO of MgO, 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, provide the preparation method of above-mentioned calcium aluminate, comprise step: starting material are selected, batching, electrosmelting, come out of the stove, cool and abrasive particle powder processed, wherein said cooling step is for from certain temperature, cooling for some time, form noncrystalline calcium aluminate.
Alternatively, according to the preparation method of calcium aluminate of the present invention, wherein at cooling step from certain temperature, cooling for some time, form noncrystalline calcium aluminate, the optimum temps of described certain temperature is 2000 degree.
Alternatively, according to the preparation method of calcium aluminate of the present invention, wherein can adjust batching according to purposes or index in batching step, the optimum temps of smelting in the step of electrosmelting is 2000 degree, need adjust flux and flow velocity coming out of the stove in step, specific surface area will be adjusted according to purposes in abrasive particle powder step processed.
The calcium aluminate obtained prepared according to the methods of the invention both can be used for making steel industry, can be used for again cement additire industry.For make steel industry time, compare with use common crystallization calcium aluminate, the fusing point step-down of ferrous materials, burn-off rate accelerate, therefore the time of Steel Refining is shortened, reduce refining power consumption, saved cost, noncrystalline calcium aluminate also has the effect of carbon-free thermal insulation agent in steelmaking process simultaneously.When for cement additire industry, cement setting speed can be changed, improve cement mark, refinforced cement intensity, and after calcium aluminate is added cement by a certain percentage, the cement obtained can as plugging agent and nuclear waste disposal agent.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.
Fig. 1 shows the preparation method of the noncrystalline calcium aluminate according to an embodiment of the invention
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
Fig. 1 shows the preparation method of the noncrystalline calcium aluminate according to an embodiment of the invention.According to present method, first selected starting material in step S1100; Then in step S1200 step, selected starting material are prepared burden in proportion; In S1300 step, the raw material prepared is carried out electrosmelting afterwards; Next in S1400 step, the raw material smelted is come out of the stove; Raw material of coming out of the stove in S1500 step afterwards cools, and forms amorphous calcium aluminate; Finally the noncrystalline calcium aluminate obtained is carried out abrasive particle powder processed operation in S1600 step.S1600 step terminates, and the preparation of noncrystalline calcium aluminate completes.
Embodiment
In the present embodiment, first entering S1100 step carries out selected to the raw material needed; Then the selected raw material obtained is entered S1200 step, the proportioning of raw material can adjust according to purposes and index in this step, has selected the Al of CaO, 30-60% of following proportioning raw materials: 40-60% in the present embodiment
2o
3, 0.01-1% the SiO of S, 1-10%
2, 0.05-3% Fe
2o
3, 0.01-5% CaF
2, 1-10% the TiO of MgO, 0-3%
2with the P of 0.01-1%; Afterwards the raw material prepared 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 process of coming out of the stove, flow and flow velocity are adjusted; Enter the S1500 step of key of the present invention after coming out of the stove, from temperature is 2000 degree, carry out cooling forming, in this step, regulation time cools, and process of cooling destroys the crystallization condition of calcium aluminate, thus defines noncrystalline calcium aluminate; Finally the noncrystalline calcium aluminate obtained is carried out the abrasive particle powder operation processed of step S1600, have adjusted the specific surface area of particle in this step according to purposes, obtain the calcium aluminate powder that granularity is 0-30mm.
By the calcium aluminate powder prepared according to the present embodiment, for in steel-making industry, find to compare 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, reduce the energy consumption of Steel Refining, meanwhile, in steelmaking process, calcium aluminate also serves the effect of carbon-free thermal insulation agent.The calcium aluminate powder prepared by the present embodiment is in addition used in the preparation of cement as cement additire, find with noncrystalline calcium aluminate of the present invention as after additive, the rate of set of cement can not only be changed, improve cement mark, refinforced cement intensity, after being joined by calcium aluminate inside cement in proportion, the cement that can be used as plugging agent and nuclear waste disposal agent can also be obtained.Therefore the noncrystalline calcium aluminate utilizing present method to prepare both may be used for making steel industry, also may be used for cement additire industry, and overcame traditional crystallization calcium aluminate for making steel the defect of industry.
It should be noted, the present invention will be described instead of limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.Word " comprises " not to be got rid of existence and does not arrange component in the claims or step.
Claims (2)
1. a calcium aluminate, comprises the Al of CaO, 30-60% of weight percent composition 40-60%
2o
3, 0.01-1% the SiO of S, 1-10%
2, 0.05-3% Fe
2o
3, 0.01-5% CaF
2, 1-10% the TiO of MgO, 0-3%
2with the P of 0.01-1%, the mass percent sum of each component equals 100%; Wherein said calcium aluminate is noncrystalline calcium aluminate, and this noncrystalline calcium aluminate is made according to the following steps:
Starting material are selected, batching, electrosmelting, come out of the stove, cool and abrasive particle powder processed, wherein said cooling step is for from certain temperature, cooling for some time, form noncrystalline calcium aluminate, described certain temperature is 2000 degree, in the step of electrosmelting, the temperature of smelting is 2000 degree, wherein, adjusts in batching step according to purposes or index to batching, need adjust flux and flow velocity coming out of the stove in step, specific surface area will be adjusted according to purposes in abrasive particle powder step processed.
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, cooling and abrasive particle powder processed, wherein said cooling step is for from certain temperature, cooling for some time, form noncrystalline calcium aluminate, described certain temperature is 2000 degree, wherein in the step of electrosmelting, the temperature of smelting is 2000 degree, wherein, according to purposes or index, batching is adjusted in batching step, need adjust flux and flow velocity coming out of the stove in step, specific surface area to be adjusted according to purposes in abrasive particle powder step processed.
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| CN201210180010.9A CN102765738B (en) | 2012-08-20 | 2012-08-20 | Amorphous calcium aluminate and preparation method thereof |
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| CN201210180010.9A CN102765738B (en) | 2012-08-20 | 2012-08-20 | Amorphous calcium aluminate and preparation method thereof |
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| CN102765738A CN102765738A (en) | 2012-11-07 |
| CN102765738B true CN102765738B (en) | 2015-07-22 |
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Families Citing this family (2)
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| FR3021046B1 (en) | 2014-05-16 | 2016-06-10 | Kerneos | ULTRA-RAPID CEMENT WITH AMORPHOUS CALCIUM ALUMINATE COMPRISING SURFACE TREATMENT |
| FR3021047B1 (en) | 2014-05-16 | 2017-11-10 | Kerneos | ULTRA-RAPID CEMENT WITH AMORPHOUS CALCIUM ALUMINATE |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002274842A (en) * | 2001-03-15 | 2002-09-25 | Kotegawa Sangyo Kk | Method of preparing amorphous calcium aluminate hydrate |
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2012
- 2012-08-20 CN CN201210180010.9A patent/CN102765738B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 熔融铝酸钙促凝剂的水化;Takayoshi Okamura等;《国外建材科技》;19940630;第15卷(第2期);第9-10页第2节，第12页第5节 * |
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