CN1631847A - Bottom oxygen blowing method for fusing and casting refractory material - Google Patents
Bottom oxygen blowing method for fusing and casting refractory material Download PDFInfo
- Publication number
- CN1631847A CN1631847A CN 200410060350 CN200410060350A CN1631847A CN 1631847 A CN1631847 A CN 1631847A CN 200410060350 CN200410060350 CN 200410060350 CN 200410060350 A CN200410060350 A CN 200410060350A CN 1631847 A CN1631847 A CN 1631847A
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- CN
- China
- Prior art keywords
- oxygen
- furnace
- pressurized air
- furnace bottom
- castable refractory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 37
- 239000001301 oxygen Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title abstract description 12
- 238000005266 casting Methods 0.000 title abstract description 3
- 238000007664 blowing Methods 0.000 title abstract 2
- 239000011819 refractory material Substances 0.000 title description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000009970 fire resistant effect Effects 0.000 abstract 2
- 230000000630 rising effect Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 239000000289 melt material Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000011449 brick Substances 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 5
- 230000005496 eutectics Effects 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910003439 heavy metal oxide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Disclosed is an oxygen blowing from the bottom method foe fusion casting fire resistant material, which includes steps of feeding material into the electric furnace, melting the material in the temperature of 1900~2300deg.C, its characteristics include: in the course of temperature rising, the compressed air and oxygen in transmitted into the furnace from the air entrance at the bottom, with their pressure separately being 0.05-1.5Mpa. Its advantages are: in the course of temperature rising, the compressed air and oxygen in transmitted into the furnace from the air entrance at the bottom, which has promoted volatilization of material in furnace, accelerating the melt material flowing, so that decreases the air hole rate of the fire-resistant material and increases its purity, prolongs its service life, meanwhile, it also reduces environmental pollution caused by waste material and saves the raw material.
Description
Technical field
The present invention relates to the production method of electric smelting product, especially relate to the furnace bottom blow oxygen of castable refractory.
Background technology
Electrocast refractories such as Corhart Zac-block, electric smelting spinel brick and refractory materials thereof, electric smelting chrome corundum brick and refractory materials thereof, white fused alumina, be one of products production kiln institute indispensable material such as metallurgy, pottery, glass, building materials based on electrocast refractories of pure alumina matter etc., its quality quality directly affects the work-ing life and the production efficiency of above-mentioned kiln.At present traditional electrocast refractories production method is raw material to be put into be warming up to 1780-2300 ℃ in the electric smelter and make behind fusion, chemical reaction and removal of contamination.Its existing deficiency of electrocast refractories product of producing mainly shows as: one, and product density is low, because electric smelter and electrolytic furnace are same principles, electrolytic furnace is the process that metal oxide is at high temperature generated purified metal simple-substance with the carbon reaction; Electric smelter is the process that metal oxide is at high temperature generated a kind of metal oxide eutectoid with another kind of melted metal oxide.Because the electrical conductor of electric smelting is the electrode that graphite is made,, thereby completely lost resistance to elevated temperatures at high temperature because coming off of carbon makes the part of the metal oxide in the stove become metal simple-substance.In order to solve this difficult problem, international and domestic many experts reach a conclusion through the test of many times that studies for a long period of time: solve with oxygen blown method on the stove.This kind method is that the oxygen in the oxygen cylinder is blown in the high temperature solution in the refining later stage by the oxygen rifle, because the restriction of working condition can only solve the problem of small part, when so the electrocast brick of producing at present is used for kiln, metal simple-substance and eutectic are separated out along with separating out of glassy phase in the baking oven process, void content increases, product medium in the stove constantly penetrates into its inside and produces chemical reaction from pore in process of production, cause the refractory materials composition to change, occur peeling off, melting, refractoriness reduces.Its two, the foreign matter content height.The residual impurity in the raw material and the fusing assistant of adding, eutectic not can not get volatilization owing to liquid does not flow.Its three, the heavy metal oxide segregation is serious in fusion-casting process.For example zirconium dioxide is molten great in aluminium sesquioxide and silicon-dioxide, precipitation causes segregation easily under liquid state, cause the interior chemical component difference of product serious, make in making the process of electrocast brick, because due to the mobile difference, between fragment of brick and the fragment of brick, same fragment of brick chemical component difference occurs between the upper and lower.Although used the production technique of blow oxygen at present, all be to adopt short-term oxygen blast on the stove, effect is undesirable.Its four, eutectic evaporable gas is discharged difficulty.What the production of electrocast refractories was adopted is to be thermal source with the electricity, and conduction process is to carry out under basic immobilized state, and molten surface is floating one deck duricrust, has stoped the discharge of eutectic volatilization gas, has influenced electrocast refractories purity greatly.Above-mentioned insufficient existence causes the electric smelting quality product low, and kiln is short work-ing life, has not only strengthened production cost, and what is more important makes a large amount of high-quality raw materials become industrial refuse.
Summary of the invention
The furnace bottom blow oxygen that the purpose of this invention is to provide a kind of castable refractory.The electrocast refractories that adopts this method to produce has solved above-mentioned existing in prior technology deficiency.
For achieving the above object, the present invention can take following technical proposals:
The furnace bottom blow oxygen of castable refractory of the present invention, it comprises in electric smelter and feeds intake, makes steps such as furnace charge thawing with being warmed up to 1900-2300 ℃ in the stove, in stove, in the temperature-rise period, the pressurized air after oil, the water sepn, oxygen are sent in the stove from the inlet mouth that is opened in the electric smelter bottom; The pressure of described pressurized air and oxygen is respectively 0.05-1.5MPa gauge pressure value.
Described electric smelter is an electric arc furnace.
The pressure of described pressurized air, oxygen is respectively 0.05MPa gauge pressure value, also can be 0.1MPa gauge pressure value or 1.5MPa gauge pressure value certainly.
Described pressurized air, oxygen are to be blown into the inner melt from furnace bottom by the oxygen rifle.
The invention has the advantages that in the furnace charge temperature-rise period, in the pressurized air of inlet mouth by being opened in furnace bottom after, the oxygen input stove with oil, water sepn, promoted the volatilization of eutectic gas in the furnace charge greatly, the furnace charge that has quickened to melt flowing in stove, thereby reduced the void content of the refractory products of producing, improved the purity of product, solved refractory products in use because of washing away, permeate, come off, peel off the problem that causes shorten work-ing life.Simultaneously also reduce the environmental pollution that causes because of waste material, saved starting material.
Embodiment
The furnace bottom blow oxygen of castable refractory of the present invention, it comprises in electric arc furnace and feeds intake, makes steps such as furnace charge thawing with being warmed up to 1900-2300 ℃ in the stove, in stove, in the temperature-rise period, the pressurized air after oil, the water sepn, oxygen are blown in the inner melt by the oxygen rifle from the inlet mouth that is opened in the electric smelter bottom.The pressure of described pressurized air, oxygen is according to the difference of furnace charge, is adjusted in the 0.05-1.5MPa gauge pressure value scope by pressure regulating equipment and carries out.
Claims (6)
1, a kind of furnace bottom blow oxygen of castable refractory, it comprises in electric smelter and feeds intake, makes steps such as furnace charge thawing with being warmed up to 1900-2300 ℃ in the stove, it is characterized in that: in stove, in the temperature-rise period, the pressurized air after oil, the water sepn, oxygen are sent in the stove from the inlet mouth that is opened in the electric smelter bottom; The pressure of described pressurized air, oxygen is respectively 0.05-1.5MPa gauge pressure value.
2, the furnace bottom blow oxygen of castable refractory according to claim 1 is characterized in that: described electric smelter is an electric arc furnace.
3, the furnace bottom blow oxygen of castable refractory according to claim 1 is characterized in that: the pressure of described pressurized air, oxygen is respectively 0.05MPa gauge pressure value.
4, the furnace bottom blow oxygen of castable refractory according to claim 1 is characterized in that: the pressure of described pressurized air, oxygen is respectively 0.1MPa gauge pressure value.
5, the furnace bottom blow oxygen of castable refractory according to claim 1 is characterized in that: the pressure of described pressurized air, oxygen is respectively 1.5MPa gauge pressure value.
6, the furnace bottom blow oxygen of castable refractory according to claim 1, its feature comprises: described pressurized air, oxygen are to be blown into the inner melt from furnace bottom by the oxygen rifle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060350 CN1631847A (en) | 2004-12-23 | 2004-12-23 | Bottom oxygen blowing method for fusing and casting refractory material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060350 CN1631847A (en) | 2004-12-23 | 2004-12-23 | Bottom oxygen blowing method for fusing and casting refractory material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1631847A true CN1631847A (en) | 2005-06-29 |
Family
ID=34846238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410060350 Pending CN1631847A (en) | 2004-12-23 | 2004-12-23 | Bottom oxygen blowing method for fusing and casting refractory material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1631847A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361836A (en) * | 2009-03-30 | 2012-02-22 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and method for producing the same |
| CN102538468A (en) * | 2010-12-17 | 2012-07-04 | 瑞泰科技股份有限公司 | Low-heat-conduction fused cast zirconia-corundum compound bricks and production method thereof |
| CN104890105A (en) * | 2015-06-30 | 2015-09-09 | 郑州远东耐火材料有限公司 | Casting mould and casting method for thickening surficial dense layer of pool wall brick |
-
2004
- 2004-12-23 CN CN 200410060350 patent/CN1631847A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361836A (en) * | 2009-03-30 | 2012-02-22 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and method for producing the same |
| CN102361836B (en) * | 2009-03-30 | 2013-07-24 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and method for producing the same |
| CN102538468A (en) * | 2010-12-17 | 2012-07-04 | 瑞泰科技股份有限公司 | Low-heat-conduction fused cast zirconia-corundum compound bricks and production method thereof |
| CN104890105A (en) * | 2015-06-30 | 2015-09-09 | 郑州远东耐火材料有限公司 | Casting mould and casting method for thickening surficial dense layer of pool wall brick |
| CN104890105B (en) * | 2015-06-30 | 2017-02-01 | 郑州远东耐火材料有限公司 | Casting mould and casting method for thickening surficial dense layer of pool wall brick |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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