CN105347802A - Electric melting fireproof material oxygen-blowing method - Google Patents

Electric melting fireproof material oxygen-blowing method Download PDF

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Publication number
CN105347802A
CN105347802A CN201410412503.XA CN201410412503A CN105347802A CN 105347802 A CN105347802 A CN 105347802A CN 201410412503 A CN201410412503 A CN 201410412503A CN 105347802 A CN105347802 A CN 105347802A
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CN
China
Prior art keywords
furnace
oxygen
fireproof
electric melting
stove
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Pending
Application number
CN201410412503.XA
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Chinese (zh)
Inventor
张磊
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Qingdao Weiye Forging Machinery Co Ltd
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Qingdao Weiye Forging Machinery Co Ltd
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Application filed by Qingdao Weiye Forging Machinery Co Ltd filed Critical Qingdao Weiye Forging Machinery Co Ltd
Priority to CN201410412503.XA priority Critical patent/CN105347802A/en
Publication of CN105347802A publication Critical patent/CN105347802A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to an electric melting fireproof material oxygen-blowing method, which comprises pouring a material to an electric melting furnace, increasing the temperature inside the furnace to 2000-2400 DEG C to make the furnace material melt, and other steps, and is characterized in that during the inside-furnace temperature increase process, compressed air after oil and water separation and oxygen are conveyed into the furnace through the gas inlet arranged on the bottom portion of the electric melting furnace, and the pressures of the compressed air and the oxygen respectively are 0.1-2.0 MPa gauge pressure value. According to the present invention, during the furnace material temperature increase process, the compressed air after oil and water separation and the oxygen are input into the furnace through the gas inlet arranged on the bottom portion of the furnace so as to substantially promote the volatilization of the low-melting substance in the furnace material and accelerate the flowing of the melting furnace material, such that the porosity of the produced fireproof material product is reduced, the product purity is improved, the problem of the shortened service life due to erosion, infiltration, shedding and peeling-off during the fireproof material product use process is solved, the environmental pollution caused by the waste is reduced, and the raw material is saved.

Description

A kind of blow oxygen of electrocast refractories
Technical field
The present invention relates to refractory technology technology field, particularly relate to a kind of blow oxygen of electrocast refractories.
Background technology
Electrocast refractories 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 indispensable material of the products production kiln such as metallurgy, pottery, glass, building materials institute based on the electrocast refractories of pure alumina matter etc., its quality directly affects work-ing life and the production efficiency of above-mentioned kiln.Electrocast refractories production method traditional is at present put in electric smelter by raw material to be warming up to 1780-2300 DEG C and to make after melting, chemical reaction and removal of contamination.Not enough main manifestations existing for its electrocast refractories product produced is: one, and product density is low, and because electric smelter and electrolytic furnace are same principles, electrolytic furnace is that metal oxide is at high temperature reacted with carbon the process generating pure metal simple-substance; Electric smelter is process metal oxide at high temperature being generated a kind of metal oxide eutectoid with another kind of melted metal oxide.Electrical conductor due to electric smelting is the electrode that graphite is made, and at high temperature because a part for the metal oxide made in stove that comes off of carbon becomes metal simple-substance, thus has completely lost resistance to elevated temperatures.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 by method oxygen blown on stove.This kind of method is blown in high temperature solution by oxygen rifle in the refining later stage by the oxygen in oxygen cylinder, restriction due to working condition can only solve the problem of small part, so when the electrocast brick produced at present is for kiln, in baking oven process, metal simple-substance and eutectic are separated out along with the precipitation of glassy phase, void content increases, product medium in process of production in stove penetrates into its inside in breaking from pore and produces chemical reaction, refractory materials composition is caused to change, occur peeling off, melting, refractoriness reduces.Its two, foreign matter content is high.Residual impurity in raw material and the fusing assistant added, eutectic can not get volatilization because liquid does not flow.Its three, in fusion-casting process, heavy metal oxide segregation is serious.Such as zirconium dioxide molten great in aluminium sesquioxide and silicon-dioxide, easily precipitation causes segregation in the liquid state, cause chemical component difference in product serious, make in the process making electrocast brick, caused by poor fluidity, between fragment of brick and fragment of brick, between same fragment of brick upper and lower, there is chemical component difference.Although employed the production technique of blow oxygen at present, be all adopt short-term oxygen blast on stove, effect is undesirable.Its four, eutectic volatilization gas discharge difficulty.What the production of electrocast refractories adopted is take electricity as thermal source, and conduction process carries out under substantially static state, and molten surface is floating one deck duricrust, prevents the discharge of eutectic volatilization gas, have impact on electrocast refractories purity greatly.The existence of above-mentioned deficiency, cause electric smelting quality product low, kiln is short for work-ing life, not only increases production cost, and what is more important makes a large amount of high-quality raw materials become industrial refuse.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of bright firing technique of refractory materials, improves burning amount, improves the quality of products.
A kind of blow oxygen of electrocast refractories, comprise and feeding intake in electric smelter, making the steps such as furnace charge thawing by being warmed up to 2000-2300 DEG C in stove, in stove in temperature-rise period, the pressurized air after oil, water being separated, oxygen are sent in stove from the inlet mouth be opened in bottom electric smelter; The pressure of described pressurized air, oxygen is respectively 0.1-2.0MPa gauge pressure value.
Described pressurized air, oxygen are blown into inner melt from furnace bottom by oxygen rifle.
The invention has the advantages that in furnace charge temperature-rise period, in pressurized air after oil, water being separated by the inlet mouth being opened in furnace bottom, oxygen input stove, greatly facilitate the volatilization of eutectic gas in furnace charge, accelerate the flowing of furnace charge in stove of having melted, thus reduce the void content of the refractory products produced, improve the purity of product, solve the problem that refractory products in use causes shorten work-ing life because washing away, permeating, come off, peel off.Also reduce the environmental pollution caused because of waste material simultaneously, save starting material.
Embodiment
Following examples in order to the present invention to be described, but do not limit the present invention:
The blow oxygen of electrocast refractories of the present invention, it comprises and feeding intake in electric arc furnace, making the steps such as furnace charge thawing by being warmed up to 2000-2300 DEG C in stove, in stove in temperature-rise period, the pressurized air after oil, water being separated, oxygen are blown in inner melt by oxygen rifle from the inlet mouth be opened in bottom electric smelter.The pressure of described pressurized air, oxygen, according to the difference of furnace charge, is carried out within the scope of 0.1-2.0MPa gauge pressure value by pressure regulating equipment adjustment.

Claims (2)

1. the blow oxygen of an electrocast refractories, it is characterized in that: comprise and feeding intake in electric smelter, making the steps such as furnace charge thawing by being warmed up to 2000-2300 DEG C in stove, in stove in temperature-rise period, the pressurized air after oil, water being separated, oxygen are sent in stove from the inlet mouth be opened in bottom electric smelter; The pressure of described pressurized air, oxygen is respectively 0.1-2.0MPa gauge pressure value.
2. the blow oxygen of the electrocast refractories according to claim l, is characterized in that: described pressurized air, oxygen are blown into inner melt from furnace bottom by oxygen rifle.
CN201410412503.XA 2014-08-21 2014-08-21 Electric melting fireproof material oxygen-blowing method Pending CN105347802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410412503.XA CN105347802A (en) 2014-08-21 2014-08-21 Electric melting fireproof material oxygen-blowing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410412503.XA CN105347802A (en) 2014-08-21 2014-08-21 Electric melting fireproof material oxygen-blowing method

Publications (1)

Publication Number Publication Date
CN105347802A true CN105347802A (en) 2016-02-24

Family

ID=55323896

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410412503.XA Pending CN105347802A (en) 2014-08-21 2014-08-21 Electric melting fireproof material oxygen-blowing method

Country Status (1)

Country Link
CN (1) CN105347802A (en)

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Application publication date: 20160224