CN1631847A - Bottom oxygen blowing method for fusing and casting refractory material - Google Patents

Bottom oxygen blowing method for fusing and casting refractory material Download PDF

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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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China
Prior art keywords
oxygen
furnace
pressurized air
stove
castable refractory
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Pending
Application number
CN 200410060350
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Chinese (zh)
Inventor
侯松发
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侯松发
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Priority to CN 200410060350 priority Critical patent/CN1631847A/en
Publication of CN1631847A publication Critical patent/CN1631847A/en
Pending legal-status Critical Current

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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

The furnace bottom blow oxygen of castable refractory
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.
CN 200410060350 2004-12-23 2004-12-23 Bottom oxygen blowing method for fusing and casting refractory material Pending CN1631847A (en)

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

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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)

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CN (1) CN1631847A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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 process for producing 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

Cited By (5)

* Cited by examiner, † Cited by third party
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 process for producing same
CN102361836B (en) * 2009-03-30 2013-07-24 黑崎播磨株式会社 Aluminum oxycarbide composition and process for producing 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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