CN1158325A - Method for prodn. of fused ZrO2 with stable calcium oxide - Google Patents
Method for prodn. of fused ZrO2 with stable calcium oxide Download PDFInfo
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- CN1158325A CN1158325A CN 96120935 CN96120935A CN1158325A CN 1158325 A CN1158325 A CN 1158325A CN 96120935 CN96120935 CN 96120935 CN 96120935 A CN96120935 A CN 96120935A CN 1158325 A CN1158325 A CN 1158325A
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Abstract
A process for producing fused ZrO2 stabilized by CaO includes high-temp (2000-2800 deg.C) smelting the mixture of zirconium silicate, carbon and calcium oxide in specially-designed DC arc furnace, casting, and high-temp (1500-1700 deg.C) heat treatment. The product contains ZrO2+HfO2 (over 94.0%) and CaO+MgO (3.5-4.5%) and can be used to make the products meet a certain requirement on heat shock and thermal expansion. Its stability is determined by stabilizer quantity.
Description
The present invention relates to a kind of production method of fused ZrO 2 of stable calcium oxide.Specifically, the present invention relates to a kind of in the direct current electric arc furnace that particular design is made the method for the zirconium dioxide of electric smelting manufactured stable calcium oxide.
As everyone knows, the method for the zirconium dioxide of production stable form in the past mainly is a chemical method, though the stable form zirconium dioxide purity height that this method is produced, cost is very high.Development along with metallurgical technology, electric smelting manufactured zirconium dioxide technology and industrialization have been invented, stable form zirconium dioxide and the desilicated zirconia produced with this method have been widely used in industries such as metallurgy is fire-resistant, non-ferrous metal, aerospace industry, electronic industry, ceramic industry, the product of premium properties such as that making requires is high temperature resistant, chemical stability good, thermal conductivity is little, hot strength is big is as ozzle, nozzle, crucible, ceramic pigment, surface coating material, engineering ceramics, kiln furnitures, refractory brick etc.Electric smelting manufactured stable form zirconium dioxide, its method be in electric arc furnace the mixture electric-arc heating of zirconium raw material and stablizer, reductive agent to molten state, under this state, reductive agent reduction purification zirconium raw material becomes zirconium dioxide, and stablizer becomes the stable form zirconium dioxide with the zirconium dioxide solid solution simultaneously.A kind of method of electric smelting manufactured stabilized zirconia has been proposed among the Chinese invention patent ublic specification of application CN1088623A, what the zirconium raw material adopted in this method is zircon sand and zirconyl chloride, stablizer is calcium oxide, yttrium oxide or hafnia, this method has proposed first by electric smelting manufactured stable form zirconium dioxide, but complex process is difficult to application.Introduced a kind of desilicated zirconia technology among the Chinese invention patent ublic specification of application CN1059704A, this technology utilizes high-temperature fusion and additional reducing agent that the zirconium silicate desiliconization is purified, technology is easy, with low cost, be suitable for suitability for industrialized production, but this method is not mentioned the manufacturing technology of stable form zirconium dioxide.
The objective of the invention is, provide a kind of easy be suitable for suitability for industrialized production, in the direct current electric arc furnace that particular design is made the production method of the fused ZrO 2 of electric smelting manufactured stable calcium oxide, promptly can produce the zirconium dioxide of stablizing crystal formation with this method, also can produce the zirconium dioxide of monoclinic form.
The object of the present invention is achieved like this:
100 weight parts, granularity are added in the mixer less than the zirconium silicate of 0.15mm, add water 0.5-1.0 weight part, start mixed 3-5 minute.Add 6-12 weight part, granularity carbon dust again, mixed 5-10 minute less than 0.04mm.Add 2.5-3.2 weight part, granularity calcium oxide micro mist at last, mixed 10-20 minute less than 0.04mm.The material that mixes is particulate state, and is mobile fine.The above-mentioned powder gradation for preparing is dropped in the direct current electric arc furnace, and charging capacity is defined as and just buries top electrode, starting the arc melting then for the first time, striking voltage is 100V, and striking current is 2000A, makes furnace temperature reach 2000 ℃, start oscillating batch charger and add the residue powder, melting 1-2 hour again.Continue heating, make furnace temperature reach 2400 ℃-2800 ℃, promote top electrode, turndown casts in the plumbago crucible, water the ingot bar naturally cooling after, be broken into material piece with jaw crusher less than 30mm, be broken into pellet with twin rollers again less than 4mm, pellet with the magnetic separator deironing after, heat-treat with high temp tunnel formula resistance kiln, thermal treatment temp is 1500 ℃-1700 ℃, and soaking time is 1-2 hour.In the product that makes with this method, principal crystalline phase content can be up to more than 98%, and residual silica volume is 0.5% or still less, is the stable form zirconium dioxide.
Illustrate the present invention with embodiment below.
The zirconium silicate of 100kg granularity less than 0.15mm dropped in the mixer, add 0.8kg water, mixed 3 minutes, add the carbon dust of 10kg granularity again, mixed 5 minutes, add the calcium oxide micro mist of 3.2kg granularity at last, mixed 15 minutes less than 0.04mm less than 0.04mm.The material gradation that mixes is dropped in the direct current electric arc furnace (specification 100kg), and under 100V voltage, with the starting the arc of 2000A electric current and carry out melting, smelting temperature is 2000 ℃, and the time is 2 hours.Then, continue to be heated to 2600 ℃, promote top electrode, turndown casts in the plumbago crucible.After watering the ingot bar naturally cooling, be broken into material piece, use the material grain of twin rollers one-tenth in small, broken bits again, use the magnetic separator deironing at last less than 4mm less than 30mm with jaw crusher.Above-mentioned material grain is contained in the alloy disc, heat-treats with tunnel like high temperature resistance kiln, thermal treatment temp is 1600 ℃, and soaking time is 2 hours.Products obtained therefrom is a safran, wherein ZrO2 (+HfO2) content 〉=94.0%, SiO2 content＜0.5%, TiO2 content＜0.4%, Al2O3 content＜0.3%, Fe2O3 content＜0.3%, CaO (+MgO) content is 4.2%-4.5%.
Claims (8)
1, a kind of is raw material with zirconium silicate, carbon, calcium oxide, melting in direct current electric arc furnace, make the method for the zirconium dioxide of stable calcium oxide, it is characterized in that: zirconium silicate, carbon and calcium oxide powder mix through mixer, gradation adds in the direct current electric arc furnace, and the positive and negative electrode by electric arc furnace comes the starting the arc and smelts fusion, is heated to 2400 ℃-2800 ℃ then, turndown is cast into piece, will water ingot bar again through 1500 ℃ of-1700 ℃ of high-temperature heat treatment.
2, method according to claim 1, zirconium silicate powder material granularity are less than 0.15mm, and carbon and calcium oxide powder material granularity are less than 0.04mm.
3, method according to claim 1 adds zirconium silicate in the mixer earlier, adds the water mixing 3--5 minute, amount of water is that per 100 gram zirconium silicates add water 0.5-1.0 milliliter, and then adds carbon dust, mixes 5-10 minute, add the calcium oxide micro mist at last, mixed 10-20 minute.
4, method according to claim 1, the add-on of carbon are that per 100 gram zirconium silicates add the 6-12 gram, and the add-on of calcium oxide is that per 100 gram zirconium silicates add the 2.5-3.2 gram.
5, method according to claim 1, the compound gradation adds in the direct current electric arc furnace, feeding quantity is defined as and just buries top electrode for the first time, starting the arc melting then, treat that temperature reaches after 2000 ℃, with oscillating batch charger the residue material was added in 1-2 hour again, and then liquation is heated to 2400-2800 ℃.
6, method according to claim 1, striking current and voltage are respectively 2000A and 100V.
7, method according to claim 1, turndown casts in the plumbago crucible, treat behind the naturally cooling frit.
8, method according to claim 1, water ingot bar in tunnel like resistance kiln through 1500 ℃-1700 ℃ high-temperature heat treatment 1-2 hour, need to be broken into the material grain of size before watering ingot bar thermal treatment, and handle through the magnetic separator deironing less than 4mm through jaw crusher and twin rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120935A CN1068860C (en) | 1996-12-04 | 1996-12-04 | Method for prodn. of fused ZrO2 with stable calcium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120935A CN1068860C (en) | 1996-12-04 | 1996-12-04 | Method for prodn. of fused ZrO2 with stable calcium oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1158325A true CN1158325A (en) | 1997-09-03 |
| CN1068860C CN1068860C (en) | 2001-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96120935A Expired - Fee Related CN1068860C (en) | 1996-12-04 | 1996-12-04 | Method for prodn. of fused ZrO2 with stable calcium oxide |
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| CN (1) | CN1068860C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076036A1 (en) * | 1999-08-13 | 2001-02-14 | dmc2 Degussa Metals Catalysts Cerdec AG | Method to produce compounds based upon stabilized, cubic zirkonoxide, products obtained and use |
| CN100335167C (en) * | 2005-10-12 | 2007-09-05 | 中国科学院山西煤炭化学研究所 | Catalyst for multi-phase catalytic synthesis of methyl carbonate, its production method and application |
| CN101244842B (en) * | 2008-03-18 | 2010-06-02 | 淄博市周村磊宝耐火材料有限公司 | Electric melting production process for steady zirconium dioxide raw material and technique for producing steady zirconium dioxide product |
| CN101722085B (en) * | 2008-10-15 | 2012-06-13 | 许兴康 | Grinding technology of high purity sub-nano level superfine zirconium silicate powder |
| CN102653417A (en) * | 2012-03-26 | 2012-09-05 | 三祥新材股份有限公司 | Method for preparing stable-type zirconium dioxide by electric smelting method |
| CN109778349A (en) * | 2019-01-17 | 2019-05-21 | 内蒙古工业大学 | Superhigh temperature ZrSi/ZrC composite nano fiber and preparation method thereof |
| CN113174636A (en) * | 2021-04-27 | 2021-07-27 | 三祥新材股份有限公司 | Method for producing single crystal electric melting zirconium dioxide |
| CN113387603A (en) * | 2021-07-14 | 2021-09-14 | 营口理工学院 | High-density fused magnesia, and preparation method and preparation device thereof |
| CN115010484A (en) * | 2022-07-07 | 2022-09-06 | 郑州振中电熔新材料有限公司 | Method for manufacturing fused calcium stabilized zirconia by using waste zirconia nozzle and sliding plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088623A (en) * | 1992-12-24 | 1994-06-29 | 郭玉山 | The method of electric smelting manufactured stabilized zirconia |
-
1996
- 1996-12-04 CN CN96120935A patent/CN1068860C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076036A1 (en) * | 1999-08-13 | 2001-02-14 | dmc2 Degussa Metals Catalysts Cerdec AG | Method to produce compounds based upon stabilized, cubic zirkonoxide, products obtained and use |
| FR2797440A1 (en) * | 1999-08-13 | 2001-02-16 | Cerdec Ag | PROCESS FOR PRODUCING STABILIZED CUBIC ZIRCONIUM OXIDE PRODUCTS, PRODUCTS OBTAINED BY THIS PROCESS AND THEIR USE |
| CN100335167C (en) * | 2005-10-12 | 2007-09-05 | 中国科学院山西煤炭化学研究所 | Catalyst for multi-phase catalytic synthesis of methyl carbonate, its production method and application |
| CN101244842B (en) * | 2008-03-18 | 2010-06-02 | 淄博市周村磊宝耐火材料有限公司 | Electric melting production process for steady zirconium dioxide raw material and technique for producing steady zirconium dioxide product |
| CN101722085B (en) * | 2008-10-15 | 2012-06-13 | 许兴康 | Grinding technology of high purity sub-nano level superfine zirconium silicate powder |
| CN102653417A (en) * | 2012-03-26 | 2012-09-05 | 三祥新材股份有限公司 | Method for preparing stable-type zirconium dioxide by electric smelting method |
| CN109778349A (en) * | 2019-01-17 | 2019-05-21 | 内蒙古工业大学 | Superhigh temperature ZrSi/ZrC composite nano fiber and preparation method thereof |
| CN109778349B (en) * | 2019-01-17 | 2021-05-04 | 内蒙古工业大学 | Ultrahigh-temperature ZrSi/ZrC composite nanofiber and preparation method thereof |
| CN113174636A (en) * | 2021-04-27 | 2021-07-27 | 三祥新材股份有限公司 | Method for producing single crystal electric melting zirconium dioxide |
| CN113174636B (en) * | 2021-04-27 | 2023-11-10 | 三祥新材股份有限公司 | Method for producing monocrystal electric smelting zirconium dioxide |
| CN113387603A (en) * | 2021-07-14 | 2021-09-14 | 营口理工学院 | High-density fused magnesia, and preparation method and preparation device thereof |
| CN113387603B (en) * | 2021-07-14 | 2022-05-03 | 营口理工学院 | High-density fused magnesia, and preparation method and preparation device thereof |
| CN115010484A (en) * | 2022-07-07 | 2022-09-06 | 郑州振中电熔新材料有限公司 | Method for manufacturing fused calcium stabilized zirconia by using waste zirconia nozzle and sliding plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1068860C (en) | 2001-07-25 |
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Owner name: LIAONING FUHONG ZIRCONIUM INDUSTRY CO., LTD. Free format text: FORMER OWNER: JIN YUZUO Effective date: 20061110 |
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Effective date of registration: 20061110 Address after: 123100 Fuxin city of Liaoning province Fumeng County Park North Road Patentee after: Liaoning Fu Fu zirconium industry Co., Ltd. Address before: 100054, 3 Ren Jen street, Beijing, Xuanwu Patentee before: Jin Yuzhuo |
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