CN1862202B - Method for making lining of high-pure rare metal smelter - Google Patents
Method for making lining of high-pure rare metal smelter Download PDFInfo
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- CN1862202B CN1862202B CN200610085139A CN200610085139A CN1862202B CN 1862202 B CN1862202 B CN 1862202B CN 200610085139 A CN200610085139 A CN 200610085139A CN 200610085139 A CN200610085139 A CN 200610085139A CN 1862202 B CN1862202 B CN 1862202B
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- burner hearth
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Abstract
The present invention relates to a preparation method of high-purity rare metal smelting furnace liner. Said invention utilizes oxide strip (board) identical to calcined rare metal oxide as furnace lining, and adopts the following steps: firstly, according to the size and form of kiln furnace cavity using press with greater than or equal to 1000 tons to press strip (board) whose thickness is 5-10mm; splicing in the kiln furnace; in the splice seam brushing identical high-purity oxide powder, then heating and forming by adopting low-temperature furnace cavity whose temperature is greater thanand equal to 110 deg.C and heating time is greater than or equal to 12 h; and further heating and forming by adopting high-temperature furnace cavity whose temperature is greater than or equal to 1700deg.C and heating time is greater than or equal to 3 h.
Description
Technical field
The present invention relates to design, the preparation method of title in the high Purity Rare Metals oxide kiln burner hearth, belong to the metallurgy of rare metal industrial equipment and transform the field.
Background technology
China has abundant rare metal resources, is the big export country of rare metal raw material and product in the world.In rare metals industry, the smelting of rare metal particularly high pure oxide preparation is the basis of rare metals industry.Kiln is the visual plant that high pure oxide is produced, and the quality of its performance directly has influence on product quality.Common inner lining of kiln not only can not satisfy the calcining requirement of high pure oxide, also introduces impurity easily in high pure oxide.The calcining high pure oxide all uses platinum crucible both at home and abroad at present, to prevent that crucible is stained material when calcining.But this class crucible is lower to the antiseptic property of some inorganic acid, salt, and production scale also is subjected to the restriction of crucible size.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method of high Purity Rare Metals oxide kiln burner hearth liner, calcine applicable to rare metal oxides such as tantalum oxide, niobium oxide, rare-earth oxides.
Technical scheme of the present invention is identical oxide bar or the plate of rare metal oxide that adopts and calcine, and as the adhesive between bar or plate, prepares the burner hearth liner that is complementary with kiln with volatile organic matters such as alcohol.
Preparation process of the present invention is as follows:
(1) preparation and identical high pure oxide bar or the plate of calcining of rare metal oxide.
Adopt high-tension apparatus (〉=1000 tons super-pressure forcing presses), compacting high strength, ganoid fine and close high pure oxide bar or plate.The planar dimension of high pure oxide bar or plate, shape can be decided according to the kiln burner hearth, and bar or thickness of slab are 5-10mm.
(2) burner hearth liner splicing.
With the high pure oxide bar of high pressure compacting or plate direct splicing in kiln.For making the driving fit more of bar or plate, can between bar or plate, brush volatile organic matters such as a spot of water or alcohol during splicing, and on splicing seams, brush corresponding high pure oxide powder.
(3) burner hearth liner moulding.
Heating in two steps, at first adopt low-temperature heat (〉=110 ℃, 〉=12h), the volatile organic matter of interblock is vapored away, high pure oxide bar (plate) slightly shrinks (shrinkage factor≤0.5%), between the high pure oxide powder infiltrate to stitch between seam.And then when heating for the second time, on splicing seams, brush corresponding high pure oxide powder once more, the high temperature heating (〉=1700 ℃, 〉=3h) make bar or sheet separation closed fully, form burner hearth liner of the present invention.
The present invention is in the process of burner hearth liner moulding, and low-temperature heat also can be divided into for two steps to be carried out, i.e. first step low-temperature heat is: 110 ℃≤temperature (T)≤150 ℃, 12h≤time (t)≤20h; The second step low-temperature heat is: temperature (T) 〉=150 ℃, time (t) 〉=12h.
Following table is that the present invention adopts 1000 tons super high pressure oil press compacting, T=110 ℃ of first step low-temperature heat, and t=12h, T=1700 ℃ of second high temperature heating, under the condition of t=3h, the mechanical property of high pure oxide bar or plate.
The mechanical property of high pure oxide bar (plate)
The present invention is according to the kind of kiln size, high Purity Rare Metals oxide, and the corresponding high strength oxide bar or the plate of preparation different size are lining in burner hearth, directly calcine different high pure oxide products.The platinum crucible that uses now can improve work efficiency 3-3.5 doubly, economize on electricity 67.66% relatively.The burner hearth liner material of the present invention's preparation is a material of the same race with smelting high pure oxide, therefore can not introduce impurity at corresponding product; In addition, product has compensating action to furnace lining, makes the long service life of burner hearth liner, and the burner hearth liner itself can be used as product and reclaims.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiment.
Example 1.
Smelt the preparation of tantalum oxide burner hearth liner
Measure SX-12 calcining furnace furnace chamber size, the tantalum oxide bar is designed to 1000 * 100 * 5mm
3Bar.To not add the tantalum oxide powder of any adhesive, do the ganoid fine and close high oxidation tantalum bar of extrusion with 1000 tons super high pressure oil press.The bulk direct splicing in kiln, and is brushed alcohol (alcohol concentration is 0.6-0.7) between splicing seams, brush some tantalum oxide on the splicing seams.Heating kiln to 150 ℃ is incubated 14 hours, alcohol volatilization this moment, and the tantalum powder of top, slit infiltrates between seam.On splicing seams, brush the tantalum powder once more, be heated to 1700 ℃, be incubated 4 hours, form closed burner hearth liner.Along with the carrying out that produces, the closed degree of burner hearth liner also can improve gradually.
Example 2.
Claim preparation in the niobium oxide burner hearth
Measure SX-12 calcining furnace furnace chamber size, the niobium oxide plate is designed to 1000 * 100 * 10mm
3Bar.Get the niobium oxide powder and go out rectangular some with the press dry-pressing.The bulk direct splicing in kiln, is brushed polyvinyl alcohol (polyvinyl alcohol concentration is 5%) between seam, some niobium oxide powder of brush on splicing seams.Heating kiln to 110 ℃ is incubated 12 hours.Heating kiln to 150 ℃ is incubated 14 hours, and alcohol volatilization this moment is sewed on the niobium powder and infiltrated between seam.On splicing seams, brush the niobium powder once more, be heated to 1700 ℃, be incubated 4 hours, form closed burner hearth liner.Along with the carrying out that produces, the closed degree of burner hearth liner also can improve gradually.
Claims (2)
1. the preparation method of a lining of high-pure rare metal smelter, it is characterized in that adopting oxide bar or the plate identical to make furnace lining with the rare metal oxide of calcining, elder generation is according to the size of kiln burner hearth, shape, press with 〉=1000 tons, thick bar or the plate of compacting 5-10mm, splicing is in kiln, between bar or plate, brush a spot of water or alcohol during splicing, and on splicing seams, brush identical high pure oxide powder, adopt earlier temperature 〉=110 ℃ then, the low temperature burner hearth hot briquetting of time 〉=12h brushes corresponding high pure oxide powder again on splicing seams, adopt temperature 〉=1700 ℃, the high-temperature burner hearth hot briquetting of time 〉=3h.
2. preparation method according to claim 1, it is characterized in that the low-temperature heat moulding in two steps, first step low-temperature heat is 110 a ℃≤temperature (T)≤150 ℃, 12h≤time (t)≤20h, the second step low-temperature heat is a temperature (T) 〉=150 ℃, the time (t) 〉=12h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610085139A CN1862202B (en) | 2006-05-28 | 2006-05-28 | Method for making lining of high-pure rare metal smelter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610085139A CN1862202B (en) | 2006-05-28 | 2006-05-28 | Method for making lining of high-pure rare metal smelter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862202A CN1862202A (en) | 2006-11-15 |
| CN1862202B true CN1862202B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200610085139A Expired - Fee Related CN1862202B (en) | 2006-05-28 | 2006-05-28 | Method for making lining of high-pure rare metal smelter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4356152A (en) * | 1981-03-13 | 1982-10-26 | Rca Corporation | Silicon melting crucible |
| US5084312A (en) * | 1989-10-12 | 1992-01-28 | United States Department Of Energy | Molten metal containment vessel with rare earth oxysulfide protective coating thereon and method of making same |
| CN1393676A (en) * | 2001-06-26 | 2003-01-29 | 山东鲁阳股份有限公司 | Combined ceramic fibre liner for furnace and its preparing process |
| CN1531744A (en) * | 2001-06-28 | 2004-09-22 | �ʼҷ����ֵ�������˾ | Method for improving inversion layer mobility in silicon carbide metal-oxide semiconductor field-effect transistor |
| JP4045390B2 (en) * | 1999-03-30 | 2008-02-13 | 富士ゼロックス株式会社 | Optical recording method, optical recording apparatus, and optical reproducing method |
-
2006
- 2006-05-28 CN CN200610085139A patent/CN1862202B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4356152A (en) * | 1981-03-13 | 1982-10-26 | Rca Corporation | Silicon melting crucible |
| US5084312A (en) * | 1989-10-12 | 1992-01-28 | United States Department Of Energy | Molten metal containment vessel with rare earth oxysulfide protective coating thereon and method of making same |
| JP4045390B2 (en) * | 1999-03-30 | 2008-02-13 | 富士ゼロックス株式会社 | Optical recording method, optical recording apparatus, and optical reproducing method |
| CN1393676A (en) * | 2001-06-26 | 2003-01-29 | 山东鲁阳股份有限公司 | Combined ceramic fibre liner for furnace and its preparing process |
| CN1531744A (en) * | 2001-06-28 | 2004-09-22 | �ʼҷ����ֵ�������˾ | Method for improving inversion layer mobility in silicon carbide metal-oxide semiconductor field-effect transistor |
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|---|---|
| CN1862202A (en) | 2006-11-15 |
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Granted publication date: 20100512 Termination date: 20130528 |