CN1296319C - Process for preparing alumine based electric capacity zirconium corindon spinel - Google Patents
Process for preparing alumine based electric capacity zirconium corindon spinel Download PDFInfo
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- CN1296319C CN1296319C CNB2004100602144A CN200410060214A CN1296319C CN 1296319 C CN1296319 C CN 1296319C CN B2004100602144 A CNB2004100602144 A CN B2004100602144A CN 200410060214 A CN200410060214 A CN 200410060214A CN 1296319 C CN1296319 C CN 1296319C
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- spinel
- corindon
- zirconium
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Abstract
The present invention provides a method for preparing a zirconium corundum spinel synthetic material. In the method, natural high alumina bauxite, light burned magnesite and zircon sand are used as main raw materials, a carbon material (coal and carbon) and iron dust are used as adjuvant materials, and the zirconium corundum spinel synthetic material is prepared through a two step reducing smelting technology, a two step oxidizing smelting technology and a refining technology, and the cost is reduced. The electric melting zirconium corundum spinel synthetic material prepared with the method of the present invention has favorable characteristic, and has the following chemical components of more than 98% of Al2O3, ZrO2 and MgO, 6 to10% of MgO and 3 to 8% of ZrO2. The phase components of the zirconium corundum spinel synthetic material are corundum, spinel and single baddeleyite, the volume density of the zirconium corundum spinel synthetic material is larger than 3.3%, and the apparent porosity of the zirconium corundum spinel synthetic material is less than 5%. The zirconium corundum spinel synthetic material can be widely used for high temperature industry, and can be mainly used as a high temperature functional material of ladles, casting materials, slide plates, etc. of steel industry.
Description
Affiliated field
The invention belongs to the composition is the ceramic shaped articles manufacturing technology field of feature, is specifically related to the method that fusion casting prepares alumina-base fused zirconium corindon spinel material.
Background technology
Along with the development of continuous casting and furnace outer refining technology, the part refining process is transferred to the ladle from steel melting furnace and is carried out.Ladle is not only the elevated temperature vessel that stores molten steel, also will carry out liquid steel refining in a vacuum, becomes characteristic metallurgical equipment.Because molten steel temperature improves, the prolongation of molten steel residence time in bag adds the erosion of the stirring action and the slag of refining process, and the working conditions of ladle liner is worsened, and the life-span descends.Lining material in the ladle mainly is a corundum spinelle at present, also has the people to add the performance that zirconium white improves Refractory Carstables for Ladles in laboratory attempt in Refractory Carstables for Ladles, but owing to cost an arm and a leg, has influenced it and applied.In state-owned abundant natural alumine and magnesite resource.If with alumine, caustic-calcined magnesite and zircon sand are raw material, and the technology through suitable is translated into electric fused zirconium corundum spinel synthetic material, and alternative corundum spinelle is used for high temperature key positions such as ladle, will obtain better result of use.So not only can make full use of the goods of the resources advantage development high added value of China, also can make contributions the development of hot industry.
By patent searching and document, find no with alumine, caustic-calcined magnesite and zircon sand are the method for feedstock production electric fused zirconium corundum spinel synthetic material.
Summary of the invention
The object of the present invention is to provide that a kind of to utilize cheap natural alumine, caustic-calcined magnesite (by the light-burned preparation of ground magnesite) and zircon sand be raw material, prepare the method for electric fused zirconium corundum spinel synthetic material.
Technical scheme of the present invention is:
The preparation method of alumina-base fused zirconium corindon spinel, with alumine, caustic-calcined magnesite, zircon sand, carbon materials and iron filings are raw material, adopt two step retailoring, two-step oxidation melting and purified preparation technology is characterized in that:
A. with alumine, carbon materials, iron filings mix by the proportioning of mass ratio 100: 6-10: 8-15, join in the electric arc furnace, voltage control is at 90-135V, the submerged arc reduction removes silicon-dioxide, titanium dioxide and impurity in the alumina under high temperature fused state, makes Al in the corundum melt
2O
3Content is greater than 98%;
B. control electric arc furnace voltage at 100-135V, the zircon sand of mass ratio 100: 12-18 and the mixture of carbon materials are progressively joined in the above-mentioned corundum melt, the silicon-dioxide in the zircon sand is removed in retailoring under high temperature fused state, makes Al in the liquation
2O
3+ ZrO
2Content is greater than 98%;
C. keep electric arc furnace voltage at 100-135V, electrode breaks away from liquid level a little, and caustic-calcined magnesite is joined in the b gained liquation gradually, makes Al in the liquation
2O
3+ ZrO
2+ MgO content is greater than 98%, MgO 6-10%, ZrO
23-8%;
D. keep electric arc furnace voltage at 100-135V, make electrode break away from liquid level a little, under 2200-2500 ℃ of high temperature oxidation state, concise 30-60 minute, finish concisely, liquation is poured out cooling, promptly make alumina-base fused zirconium corindon spinel.
In above-mentioned preparation method: the main component after the alumine igloss is Al
2O
383-90%, SiO
23-8%, TiO
22-5%, granularity is 10-30mm; Carbon materials is coal or coke or graphite, and fixation of C is 75-85%, and ash content is 10-20%, and granularity is 1-5mm; Fe content is 75-85% in the iron filings, and length is 10-200mm; ZrO in the zircon sand
2Be 64-67%, granularity is 0.1-1mm; The main component of caustic-calcined magnesite is MgO 94-96%, CaO 0.3-1.5%, SiO
20.3-1.5%, granularity is 0.1-1mm.
The invention has the advantages that:
1, the present invention replaces commercial alumina, highly-purity magnesite and zirconium white to prepare the novel high-quality synthesis material of a kind of high-performance, high added value with alumine cheap and easy to get, caustic-calcined magnesite and zircon sand.
2, the electric fused zirconium corundum spinel with the present invention's preparation has good characteristic, and its chemical ingredients is: Al
2O
3+ ZrO
2+ MgO＞98%, MgO 6-10% wherein, ZrO
23-8%.Phase composite is: corundum, spinel, monocline zirconium.Volume density is greater than 3.3%, and apparent porosity is less than 5%.Can be widely used in and produce the various goods that hot industry is used.
Embodiment:
Below in conjunction with embodiment the present invention is further described, but is not limited to the following example.
Embodiment 1
Raw material: alumine: Al
2O
389.65%, SiO
23.93%, TiO
24.12%, granularity 10mm-30mm; Zircon sand: ZrO
2Content 65.5%, granularity 0.1mm; Caustic-calcined magnesite: MgO content 95.3%, CaO 1.3%, SiO
21.0%, granularity is 0.2mm; Hard coal: fixation of C is 75%, ash content 10%, granularity 2mm; Graphite block: fixation of C is 80%, granularity 2mm; Iron filings: Fe content is 76%, length 5-20mm.
The preparation method:
With alumine 100kg, hard coal 7.0kg, iron filings 8kg mixes.With this compound shop furnace bottom 20kg, add 1kg graphite block (granularity＜25mm), 0.5Kg iron filings, the voltage 90V starting the arc.Add the compound melting then, retailoring is 60 minutes under about 2100 ℃ of high temperature, removes silicon-dioxide, titanium dioxide and impurity in the alumina, makes Al in the corundum melt in batches
2O
3Content is greater than 98%.Observe the melting situation in this stage by being stained with rod;
Control electric arc furnace voltage is at 125V, and with zircon sand 8kg, coke granule 1.2kg mixes, and under the submerged arc condition, this compound is added to melting in the above-mentioned corundum melt in batches, removes the silicon-dioxide in the zircon sand, makes Al in the liquation
2O
3+ ZrO
2Content is greater than 98%;
Sustaining voltage 125V is constant, and electrode breaks away from liquid level a little, is the oxidizing semlting state, makes melt temperature more than 2300 ℃, adds caustic-calcined magnesite 7.2kg;
Voltage is remained on 125V, make electrode break away from liquid level a little, under the 2200-2500 ℃ of high temperature oxidation state, be the long arc state, cooling is poured out in refining 40 minutes, promptly gets product.
Gained zirconium corindon spinel chemical ingredients (mass percent) and physicals are as follows:
| Al 2O 3 | MgO | ZrO 2 | Volume density (g/cm 3) | Apparent porosity (%) |
| 87.76 | 6.89 | 3.57％ | 3.41 | 4.50 |
Embodiment 2:
Raw material: alumine: Al
2O
389.65%, SiO
27.90%, TiO
24.12%, granularity 20mm; Graphite: fixation of C is 80%, granularity 3mm; Iron filings: Fe content is 80%, length 100mm; Zircon sand: ZrO
2Content 67%, granularity 0.5mm; Caustic-calcined magnesite: MgO content 94.5%, CaO0.5%, SiO
21.5%, granularity is 0.6mm.
Preparation process is with embodiment 1.
Change coke granule 6kg into graphite granule 5.5kg.
A step voltage control is at 100V, 2200 ℃ of temperature; B step voltage control is at 130V; C step voltage control is at 130V, and temperature is more than 2400 ℃; The same c of d step voltage and temperature, refining 50 minutes.
Gained zirconium corindon spinel chemical ingredients (mass percent) and physicals are as follows:
| Al 2O 3 | MgO | ZrO 2 | Volume density (g/cm 3) | Apparent porosity (%) |
| 88.10 | 6.74 | 3.42％ | 3.43 | 4.10 |
Embodiment 3:
Raw material: alumine: Al
2O
385%, SiO
25.60%, TiO
23.12%, granularity 28mm; Hard coal: fixation of C is 85%, ash content 15%, granularity 5mm; Graphite block: fixation of C is 85%, granularity 3mm; Iron filings: Fe content is 85%, length 180mm; Zircon sand: ZrO
2Content 66%, granularity 1mm; Caustic-calcined magnesite: MgO content 96%, CaO 1.0%, SiO
21.5%, granularity is 0.8mm.
Preparation process is with embodiment 1.
7.2kg changes 11kg into the caustic-calcined magnesite add-on.
A step voltage control is at 110V, 2200 ℃ of temperature; B step voltage control is at 135V; C step voltage control is at 135V, and temperature is more than 2450 ℃; The same c of d step voltage and temperature, refining 60 minutes.
Gained zirconium corindon spinel chemical ingredients (mass percent) and physicals are as follows:
| Al 2O 3 | MgO | ZrO 2 | Volume density (g/cm 3) | Apparent porosity (%) |
| 87.24 | 9.34 | 3.30％ | 3.37 | 4.80 |
Claims (6)
1. the preparation method of alumina-base fused zirconium corindon spinel, with alumine, caustic-calcined magnesite, zircon sand, carbon materials and iron filings are raw material, adopt electric smelting preparation technology, it is characterized in that:
A. with alumine, carbon materials, iron filings mix by the proportioning of mass ratio 100: 6-10: 8-15, join in the electric arc furnace, voltage control is at 90-135V, the submerged arc reduction removes silicon-dioxide, titanium dioxide and impurity in the alumina under high temperature fused state, makes Al in the corundum melt
2O
3Content is greater than 98%;
B. control electric arc furnace voltage at 100-135V, the zircon sand of mass ratio 100: 12-18 and the mixture of carbon materials are progressively joined in the above-mentioned corundum melt, the silicon-dioxide in the zircon sand is removed in retailoring under high temperature fused state, makes Al in the liquation
2O
3+ ZrO
2Content is greater than 98%;
C. keep electric arc furnace voltage at 100-135V, electrode breaks away from liquid level a little, and caustic-calcined magnesite is joined in the b gained liquation gradually, makes Al in the liquation
2O
3+ ZrO
2+ MgO＞98%, MgO 6-10%, ZrO
23-8%;
D. keep electric arc furnace voltage at 100-135V, electrode breaks away from liquid level a little, under 2200-2500 ℃ of high temperature oxidation state, and concise 30-60 minute, pour out cooling, promptly make product.
2. according to the preparation method of the described alumina-base fused zirconium corindon spinel of claim 1, it is characterized in that the main component after the alumine igloss is: Al
2O
383-90%, SiO
23-8%, TiO
22-5%, granularity is 10-30mm.
3. according to the preparation method of the described alumina-base fused zirconium corindon spinel of claim 1, it is characterized in that carbon materials is coal or coke or graphite, fixation of C is 75-85%, and ash is 10-20%, and granularity is 1-5mm.
4. according to the preparation method of the described alumina-base fused zirconium corindon spinel of claim 1, it is characterized in that Fe content is 75-85% in the iron filings, length is 10-200mm.
5. according to the preparation method of the described alumina-base fused zirconium corindon spinel of claim 1, it is characterized in that the main component of zircon sand is: ZrO
264-67%, granularity is 0.1-1mm.
6. according to the preparation method of the described alumina-base fused zirconium corindon spinel of claim 1, it is characterized in that the main component of caustic-calcined magnesite is: MgO 94-96%, CaO 0.3-1.5%, SiO
20.3-1.5%, granularity is 0.1-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100602144A CN1296319C (en) | 2004-11-05 | 2004-11-05 | Process for preparing alumine based electric capacity zirconium corindon spinel |
Applications Claiming Priority (1)
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|---|---|---|---|
| CNB2004100602144A CN1296319C (en) | 2004-11-05 | 2004-11-05 | Process for preparing alumine based electric capacity zirconium corindon spinel |
Publications (2)
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|---|---|
| CN1623957A CN1623957A (en) | 2005-06-08 |
| CN1296319C true CN1296319C (en) | 2007-01-24 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326806C (en) * | 2005-09-29 | 2007-07-18 | 郑州大学 | Alumina-base fused high-purity spinel and its prepn |
| CN101580403B (en) * | 2009-06-25 | 2012-07-04 | 攀钢冶金材料有限责任公司 | Vanadium extraction converter lining patching material composite and preparation method thereof |
| CN101885503A (en) * | 2010-05-31 | 2010-11-17 | 修文县银星磨料有限公司 | Smelting process of semi-brittle corundum abrasive materiel |
| CN101863672B (en) * | 2010-06-01 | 2012-11-07 | 江苏晶邦新型材料有限公司 | Preparation method of alumina corundum hollow sphere |
| CN102649644A (en) * | 2011-02-23 | 2012-08-29 | 任有科 | Magnesium aluminum zirconium melting refractory material and preparation method |
| CN104311063B (en) * | 2014-10-09 | 2016-08-24 | 宁夏天纵泓光余热发电技术有限公司 | Hercynite castable refractory |
| CN106631068A (en) * | 2016-12-27 | 2017-05-10 | 通达耐火技术股份有限公司 | Bauxite-based homogenous corundum environment-friendly steel ladle base brick and preparation method |
| CN109320218B (en) * | 2018-12-04 | 2021-09-28 | 刘自发 | Aluminum-zirconium refractory material brick and preparation method thereof |
| CN111348905A (en) * | 2019-07-08 | 2020-06-30 | 营口石兴耐火材料科技有限公司 | Magnesium oxide micro powder reinforced aluminum zirconium carbon sliding plate and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096581A (en) * | 1983-10-31 | 1985-05-30 | 黒崎窯業株式会社 | Ceramic furnace injection repairing material |
| CN1232003A (en) * | 1999-01-12 | 1999-10-20 | 褚长庆 | Inorganic combined high strength alumina-magnesia corundum-spinel steel ladle pouring material and its producing method |
-
2004
- 2004-11-05 CN CNB2004100602144A patent/CN1296319C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096581A (en) * | 1983-10-31 | 1985-05-30 | 黒崎窯業株式会社 | Ceramic furnace injection repairing material |
| CN1232003A (en) * | 1999-01-12 | 1999-10-20 | 褚长庆 | Inorganic combined high strength alumina-magnesia corundum-spinel steel ladle pouring material and its producing method |
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|---|---|
| CN1623957A (en) | 2005-06-08 |
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Granted publication date: 20070124 Termination date: 20111105 |