CN103214250A - Recycling method for waste alumina brick - Google Patents

Recycling method for waste alumina brick Download PDF

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Publication number
CN103214250A
CN103214250A CN2012105882678A CN201210588267A CN103214250A CN 103214250 A CN103214250 A CN 103214250A CN 2012105882678 A CN2012105882678 A CN 2012105882678A CN 201210588267 A CN201210588267 A CN 201210588267A CN 103214250 A CN103214250 A CN 103214250A
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brick
alumina
ball
fusing
solid sphere
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CN103214250B (en
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王国海
李起胜
徐宝魁
刘官清
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ZHENGZHOU ZHENZHONG FUZED NEW MATERIALS CO Ltd
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ZHENGZHOU ZHENZHONG FUZED NEW MATERIALS CO Ltd
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Abstract

The invention discloses a recycling method for a waste alumina brick. The recycling method comprises removing impurities, mixing, pressing into balls, carrying out high temperature melting smelting, blowing the balls, sorting, carrying out chemical component blending, carrying out melting casting molding, and other processes, such that the Al2O3 component in the waste alumina brick after high temperature use can be reused.

Description

Utilize method again with the discarded alumina brick in back
Technical field
The present invention relates to this industrial solid wastes of discarded alumina firebrick after the high temperature use are recycled utilization again, realize the use of aluminum oxide resource circulation.
Background technology
Because alumina firebrick has excellent fire performance, when the high temperature kiln life cycle finished, it was etched seldom, or did not corrode, because it has passed through high temperature, tore kiln open and got off to have become the fragment that differs in size, and its main chemical ingredients is still aluminum oxide (Al 2O 3), be mixed with small amount of impurities simultaneously.Because the aluminum oxide resource becoming scarce resource, therefore, tear the alumina brick that kiln gets off open and also have very large value, continue the value of performance chemical ingredients wherein, it is carried out second development and utilization, have the meaning of saving resource, protection environment.
The invention discloses and a kind ofly utilize again with the discarded alumina brick in back, manufacture the method for ball-aluminium oxide abrasive material and founding aluminium oxide refractory brick,, compacting balling-up, electric arc furnace high-temperature fusion mixing by mechanical disintegration and sorting, waste alumina brick particulate material and pitch wedding agent are smelted, are blown out technology such as solid sphere, solid sphere sorting and produce alumina abrasives, and this is a kind of abrasive substance of spheroidal particle; And the solid sphere that utilizes sorting to get off carries out technology such as chemical ingredients allotment, fusion-cast and produces fused cast aluminabrick, and this is a kind of senior castable refractory that can be used for building by laying bricks or stones high temperature kiln such as glass furnace.
Summary of the invention
The objective of the invention is to this industrial solid wastes of the discarded alumina firebrick after the high temperature use (being called for short waste alumina refractory brick) are handled, realize the comprehensive utilization of aluminum oxide resource, make ball-aluminium oxide abrasive and founding aluminium oxide refractory brick.
For achieving the above object, the present invention can take following technological method:
The first step: the pre-treatment of waste alumina refractory brick:
With the used waste alumina refractory brick of high temperature that reclaims, adopt the method for mechanical grinding, remove the impurity of its surface attachment; Adopt jaw crusher, oppositely rolling roller crusher with the waste alumina refractory brick fragmentation of reclaiming, sort out impurity is below the granularity 10mm of particulate material.
Second step: batching is with mixing
Proportion scale is that the useless brick particulate material of aluminum oxide accounts for 90%-95%, the pitch wedding agent accounts for 5%-10%.Use the mixing machine of band heating unit, add useless brick particulate material earlier, add the pitch wedding agent then and carry out mixing.
The 3rd step: compacting balling-up
The material that mixes is suppressed balling-up with ball press, and the granularity of ball is about 30mm.Because the useless brick particulate material of aluminum oxide is sort out impurity, so only remaining small amount of impurities is attached to particle surface, and impurity component mainly contains two kinds, and a kind of is silicon oxide (SiO2), another is metal or its oxide compounds such as iron that the disintegrating apparatus grinding is got off, all is exogenous impurity.By and compacting balling-up mixing with pitch, make the pitch coated alumina brick particulate material of giving up, pitch fully contacts with the impurity that adheres to, and the carbon and the impurity that are beneficial in the pitch react.
The 4th step: high-temperature fusion is smelted
The 3rd particulate material and the mixing ball that is pressed into of pitch that goes on foot the waste alumina refractory brick that obtains joined in the electric arc furnace, carry out high-temperature fusion and smelt.Electric arc furnace secondary voltage 120V-220V, secondary current 1000A-30000A during smelting; Smelting cycle 50-120 minute; SiO in the particulate material 2Be reduced into SiO, from stove, evaporate; Metallic impurity wherein are deposited in furnace bottom; Wherein ferric oxide and silicon oxide are produced ferrosilicon under the reduction situation, are deposited in furnace bottom; Na in the furnace charge 2O, K 2Alkalimetal oxides such as O evaporate from stove under the high temperature action of electric arc.
The 5th step: blowing solid sphere
When a fusing end cycle, the upper strata liquation has met smelting requirements in the stove, the body of heater that fascinates, and when liquation flowed out converter nose, under the effect of High-Pressure Water, liquation was blown to hollow ball, the pressure of high pressure water: 0.4-0.8MPa.
The 6th step: the sorting of solid sphere
The solid sphere that the last step obtains is dried, carry out sorting classifying then, particle shape solid sphere complete, that meet granularity requirements is used for abrasive substance, because this solid sphere is to have complete spheroidal particle, so it has special grinding effect.
The 7th step: solid sphere chemical ingredients allotment
The spherical incomplete aluminum oxide solid sphere that the sorting of last step is got off carries out chemical ingredients allotment, proportion scale: solid sphere: 90%-70%; Commercial alumina: 10%-25%; Soda ash: below 10%; The chemical ingredients of admixtion is reached: Al 2O 3: 92%-99%; SiO 2≤ 0.5%; Na 2O:0.5%-7%.
The 5th step: fusion-cast moulding
To melt in this admixtion adding electric arc furnace, melting voltage: 120-240V, fusion current: 1000A-20000A, in 40-120 minute fusing cycle, fusing is during end cycle, and liquation is cast in the model that refractory materials makes, adopt lagging material to the casting mold insulation annealing, soaking time 15-20 days, then product is cut mill processing, obtain meeting the founding aluminium oxide refractory brick of product standard at last.
Embodiment:
Embodiment one:
1, behind the waste alumina brick labor cleaning after the usefulness that will reclaim, by jaw crusher, roll crusher fragmentation, sort out impurity, the granularity of the particulate material that obtains is below the 10mm.
2, use the mixing machine of band heating unit, Heating temperature is 80 ℃, is that the useless brick particulate material of aluminum oxide accounts for 90%, the pitch wedding agent accounts for 10% according to proportion scale, adds useless brick particulate material earlier, add then the pitch wedding agent carry out mixing, mixing time 20-30 minute.
3, the material that will mix is suppressed balling-up with ball press, and the granularity of ball is about 30mm.
4, will melt smelting in the ball adding electric arc furnace that suppress.
Electrical parameter is smelted in fusing: secondary voltage is 150V-170V, and secondary current is 10000A, smelting cycle: 90 minutes.
5, when smelting cycle finishes, open the valve of high pressure water, the body of heater that fascinates will be blown out solid sphere from the effusive melt of converter nose, blow ball high pressure water pressure: 0.5MPa.
6, the ball of producing by boasting is dried, then solid sphere is carried out sorting, spherical complete as the abrasive ball, the ball that sorting is got off is used to produce fused cast aluminabrick.
7, the sorting aluminum oxide solid sphere that gets off is carried out chemical ingredients allotment, add a small amount of commercial alumina, soda ash, ratio: in the 1000kg admixtion: the 700kg ball, the 212kg commercial alumina, 88kg soda ash reaches the chemical ingredients of admixtion: Al 2O 3: 95%; SiO 2≤ 0.6%; Na 2O:5%.
8, compound is joined in the electric arc furnace melt, the control secondary voltage is 180V-220V; Secondary current 5000A-7000A, fusing time is 80-100 minute.
9, will melt good liquation and be cast in the model that combines in advance, model adopts the emergy plate to make.
10, before the casting, model is imbedded insulation annealing in the thermal insulation medium, thermal insulation medium is selected commercial alumina powder and alumina hollow ball for use, all around insulation layer thickness 〉=250 ㎜.Model after the casting stopped 15-20 days naturally, made the brick material realize insulation annealing.
11, the product for the treatment of insulation annealing drops to below 60 ℃, product can be taken out, and carries out surface-conditioning, through after the assay was approved, cuts mill processing and assembling etc. by customer requirements.
Embodiment two:
Present embodiment and embodiment one process basically identical, particulate material and bituminous ratio when its key distinction is mixing, some parameters are had any different when smelting, and technology controlling and process slightly adjusts:
1, behind the waste alumina brick labor cleaning after the usefulness that will reclaim, by jaw crusher, roll crusher fragmentation, sort out impurity, the granularity of the particulate material that obtains is below the 10mm.
2, use the mixing machine of band heating unit, Heating temperature is 80 ℃, is that the useless brick particulate material of aluminum oxide accounts for 95%, the pitch wedding agent accounts for 5% according to proportion scale, adds useless brick particulate material earlier, add then the pitch wedding agent carry out mixing, mixing time 20-30 minute.
3, the material that will mix is suppressed balling-up with ball press, and the granularity of ball is about 30mm.
4, will melt smelting in the ball adding electric arc furnace that suppress.
Electrical parameter is smelted in fusing: secondary voltage is 140V-160V, and secondary current is 12000A, smelting cycle: 70 minutes.
5, when smelting cycle finishes, open the high pressure water valve, the body of heater that fascinates will be blown out solid sphere from the effusive melt of converter nose, blow ball compressed air pressure: 0.8MPa.
6, the ball of producing by boasting is dried, then solid sphere is carried out sorting, spherical complete as the abrasive ball, the ball that sorting is got off is used to produce fused cast aluminabrick.
7, the aluminum oxide solid sphere that minute sorting is got off carries out the chemical ingredients allotment, adds a small amount of commercial alumina, soda ash, concrete ratio: in the 1000kg admixtion: the 600kg ball, and the 320kg commercial alumina, 80kg soda ash reaches the chemical ingredients of admixtion: Al 2O 3: 95%; SiO 2≤ 0.6%; Na 2O:5%.
8, compound is joined in the electric arc furnace melt, the control secondary voltage is 190V-210V, electric current 5000A-7000A, and fusing time is 90-110 minute.
9, will melt good liquation and be cast in the model that combines in advance, model adopts the emergy plate to make.
10, before the casting, model is imbedded insulation annealing in the thermal insulation medium, thermal insulation medium is selected commercial alumina powder and alumina hollow ball for use, all around insulation layer thickness 〉=250 ㎜.Model after the casting stopped 15-20 days naturally, made the brick material realize insulation annealing.
11, the product for the treatment of insulation annealing drops to below 60 ℃, product can be taken out, and carries out surface-conditioning, through after the assay was approved, cuts mill processing and assembling etc. by customer requirements.
It should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (8)

  1. One kind with the discarded alumina brick in back utilize method again, it is characterized in that:
    The pre-treatment of step 1, waste alumina brick: the used waste alumina refractory brick of high temperature with recovery is raw material, removes the impurity of waste alumina refractory brick surface attachment, is broken for the following particulate material of 10mm;
    Step 2, particulate material and pitch wedding agent is mixing, proportion scale are that the useless brick particulate material of aluminum oxide accounts for 90%-95%, the pitch wedding agent accounts for 5%-10%, is pressed into the ball about 30mm subsequently;
    The ball that suppress step 3, particulate material and the mixing back of pitch that will go up the waste alumina brick that obtains of step joins in the electric arc furnace, carrying out high-temperature fusion smelts, the electric arc furnace secondary voltage is that 110V-220V, secondary current are 1000A-30000A during smelting, and smelting cycle is 50-120 minute;
    Step 4, when fusing during end cycle, the body of heater that fascinates under the effect of High-Pressure Water, is blown out solid sphere with liquation, the pressure of High-Pressure Water is 0.4-0.8MPa;
    Step 5, with solid sphere oven dry and carry out sorting, spherical complete ball is as abrasive;
    Step 6, the aluminum oxide solid sphere that sorting is got off carry out chemical ingredients allotment, proportion scale: solid sphere: 90%-70%; Commercial alumina: 10%-25%; Soda ash :≤10%; The chemical ingredients of admixtion is reached: Al 2O 3: 92%-99%; SiO 2≤ 0.6%; Na 2O:0.5%-7%;
    Step 7, fusing cast molding: will melt in the deployed admixtion adding electric arc furnace, melting voltage is 120-240V, fusion current is 1000A-20000A, the fusing cycle is 40-120 minute, and fusing is during end cycle, and liquation is cast in the model that refractory materials makes, adopt lagging material to the casting mold insulation annealing, soaking time 10-20 days, then product is cut mill processing, obtain founding aluminium oxide refractory brick at last.
  2. 2. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 1, adopt the method for mechanical grinding to remove the impurity of waste alumina refractory brick surface attachment; Adopt jaw crusher, oppositely rolling roller crusher that the waste alumina refractory brick that reclaims is carried out fragmentation then.
  3. 3. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 2, use the mixing machine of band heating unit, add useless brick particulate material earlier, add the pitch wedding agent then and carry out mixingly, suppress balling-up subsequently.
  4. 4. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 3, electrical parameter is smelted in fusing: secondary voltage is 150V-170V, and secondary current is 10000A, and smelting cycle is 90 minutes.
  5. 5. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 4, when a fusing end cycle, the body of heater that fascinates under the effect of High-Pressure Water, is blown out solid sphere with liquation.
  6. 6. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 5, with the solid sphere oven dry and carry out sorting, spherical complete ball is as abrasive.
  7. 7. according to claim 1ly a kind ofly utilize method again with the discarded alumina brick in back, it is characterized in that: in the step 6, the sorting aluminum oxide solid sphere that gets off is carried out chemical ingredients allotment, add a small amount of commercial alumina, soda ash, ratio is: in the 1000kg admixtion: the 600-700kg ball, the 212-320kg commercial alumina, 80-88kg soda ash reaches the chemical ingredients of admixtion: Al 2O 3: 95%; SiO 2≤ 0.6%; Na 2O:5%.
  8. 8. according to claim 1 a kind of with the discarded alumina brick in back utilize method again, it is characterized in that: in the step 7, described secondary voltage is 180V-220V; Secondary current 5000A-7000A, fusing time is 80-110 minute; Described model adopts the emergy plate to make, before the casting, model is imbedded insulation annealing in the thermal insulation medium, thermal insulation medium is selected commercial alumina powder and alumina hollow ball for use, insulation layer thickness 〉=250 ㎜ all around, model after the casting stopped 15-20 days naturally, made the brick material realize insulation annealing, treated that the product of insulation annealing drops to below 60 ℃, product can be taken out, carry out surface-conditioning,, cut mill processing and assembling by customer requirements through after the assay was approved.
CN201210588267.8A 2012-12-31 2012-12-31 Recycling method for waste alumina brick Active CN103214250B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103570369A (en) * 2013-11-07 2014-02-12 长兴云峰炉料有限公司 Making method of main channel castable of blast furnace
CN104446545A (en) * 2014-11-25 2015-03-25 淄博旭硝子刚玉材料有限公司 Fusing refractory material damper block and preparation method thereof
CN109732747A (en) * 2018-12-13 2019-05-10 胡昆朋 A kind of production and processing technology of new material refractory slab
CN109942306A (en) * 2019-03-28 2019-06-28 江苏悦展新型材料有限公司 A kind of method of Novel fireproof brick recycling and its reworked material application
CN110922198A (en) * 2019-12-16 2020-03-27 安徽工业大学 Method for regenerating aluminum-silicon waste refractory aggregate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101792317A (en) * 2010-03-09 2010-08-04 浙江大学 Method for producing high-strength alumina hollow spheres
CN102241520A (en) * 2010-05-13 2011-11-16 郑州振中电熔锆业有限公司 Method for melting and casting alpha alumina product
CN102249717A (en) * 2011-05-31 2011-11-23 浙江大学 Magnesium-aluminum-calcium hollow sphere and preparation method thereof
CN102249716A (en) * 2011-05-31 2011-11-23 傅晓云 High-temperature resistant hollow spheres and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101792317A (en) * 2010-03-09 2010-08-04 浙江大学 Method for producing high-strength alumina hollow spheres
CN102241520A (en) * 2010-05-13 2011-11-16 郑州振中电熔锆业有限公司 Method for melting and casting alpha alumina product
CN102249717A (en) * 2011-05-31 2011-11-23 浙江大学 Magnesium-aluminum-calcium hollow sphere and preparation method thereof
CN102249716A (en) * 2011-05-31 2011-11-23 傅晓云 High-temperature resistant hollow spheres and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103570369A (en) * 2013-11-07 2014-02-12 长兴云峰炉料有限公司 Making method of main channel castable of blast furnace
CN103570369B (en) * 2013-11-07 2015-01-28 长兴云峰炉料有限公司 Making method of main channel castable of blast furnace
CN104446545A (en) * 2014-11-25 2015-03-25 淄博旭硝子刚玉材料有限公司 Fusing refractory material damper block and preparation method thereof
CN109732747A (en) * 2018-12-13 2019-05-10 胡昆朋 A kind of production and processing technology of new material refractory slab
CN109942306A (en) * 2019-03-28 2019-06-28 江苏悦展新型材料有限公司 A kind of method of Novel fireproof brick recycling and its reworked material application
CN110922198A (en) * 2019-12-16 2020-03-27 安徽工业大学 Method for regenerating aluminum-silicon waste refractory aggregate

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