CN104446558B - A kind of Al 2o 3-Cr 2o 3refractory product - Google Patents
A kind of Al 2o 3-Cr 2o 3refractory product Download PDFInfo
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- CN104446558B CN104446558B CN201410728912.0A CN201410728912A CN104446558B CN 104446558 B CN104446558 B CN 104446558B CN 201410728912 A CN201410728912 A CN 201410728912A CN 104446558 B CN104446558 B CN 104446558B
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Abstract
The present invention relates to a kind of Al
2o
3-Cr
2o
3refractory product.Described Al
2o
3-Cr
2o
3containing heterogeneous Al in the aggregate of refractory product
2o
3-Cr
2o
3particle, it is a kind of artificial-synthetic material, has uneven chemical constitution, described heterogeneous Al
2o
3-Cr
2o
3the centre Cr of particle
2o
3content is lower than the Cr of edge
2o
3content; Heterogeneous Al
2o
3-Cr
2o
3granular mass is 50% ~ 90% of whole aggregate total mass.The present invention can make Cr
2o
3raw material obtains efficient and rational utilization, more identical Cr
2o
3the existing Al of content
2o
3-Cr
2o
3refractory castable, its slag resistance significantly promotes, and as the working lining materials'use with slag contacts, its bulk life time can promote more than 1 times; If the Al that processability is suitable
2o
3-Cr
2o
3refractory product, the present invention can save Cr
2o
3raw material more than 30%.
Description
Technical field
The invention belongs to fire resisting material field, relate generally to a kind of Al
2o
3-Cr
2o
3refractory product.
Background technology
In oxide refractories known at present, chromium sesquioxide (Cr
2o
3) there is fabulous slag-resistant erosion performance, be the refractory raw material of erosion-resistant material indispensability.Al
2o
3-Cr
2o
3series refractory materials has higher physical strength and excellent resistance to chemical attack, be the high performance refractory materials of a class, be widely used in the positions strong in slag effect such as rubbish melting furnace, melting reduction iron-making furnace, black reactor, non-ferrous metal smelting furnace, coal slurry gasifier.
Cr
2o
3composition is at Al
2o
3-Cr
2o
3ratio in refractory materials is higher, and the slag-resistant erosion performance of material is better.But, relative to Al
2o
3class raw material, Cr
2o
3class raw material resources are limited, and cost of manufacture is high, cause Cr
2o
3class expensive raw material price.And, Cr
2o
3a small amount of Cr can be produced in production with in using
6+, Cr
6+to water source, animals and plants harm seriously.Reduce Cr
2o
3production and use meet requirement day by day to environment protection in global range.
Al
2o
3-Cr
2o
3refractory materials, be by grain diameter 0.074mm ~ 5mm containing Al
2o
3and Cr
2o
3class particle is aggregate, containing Al
2o
3and Cr
2o
3class fine powder and micro mist and other additive are powder, and after being mixed into half siccative with organic or inorganic bonding agent, friction press is pressed into base substrate, fires for about 1600 ~ 1800 DEG C and forms.According to the Al of design of material
2o
3, Cr
2o
3chemical composition, selects different particles and fine powder, micro mist.Usually used as Al
2o
3-Cr
2o
3the particle of refractory material aggregate is electric smelting chrome oxide particle, sintering oxidation chromium particle, fused corundom particle, plate diamond spar particle, electric smelting Al
2o
3-Cr
2o
3particle, sintering Al
2o
3-Cr
2o
3particle etc.These particle one classes are Cr
2o
3or Al
2o
3crystal, another kind of is Al
2o
3-Cr
2o
3sosoloid, all has the chemical composition content of uniformity.
Document (Wang Han .Cr
2o
3-Al
2o
3different composition Cr in brick
2o
3-Al
2o
3the anti-erosion research [J] of electric smelting particulate material. refractory materials, 2010,44 (6): 5) disclose a kind of main aggregate by one single purity electric smelting Al
2o
3-Cr
2o
3the Cr of granulometric composition
2o
3-Al
2o
3brick.It is respectively with CR99, CR85, CR60, CR50, CR40, CR15 electric smelting Al of particle diameter 1 ~ 4mm
2o
3-Cr
2o
3the 99%Cr of particle and≤1mm
2o
3fine sand is aggregate, to contain Al
2o
3and Cr
2o
3fine powder be powder, adopt bonding agent to mix, through techniques such as overmolding, drying, high temperature burn till, the obtained Cr containing CR99, CR85, CR60, CR50, CR40, CR15 particulate material respectively
2o
3-Al
2o
3standard brick 6 pieces.Wherein CR99 material is raw material with chromoxide green, uses large-scale pallet car type three-phawse arc furnace to carry out electric smelting and obtained particulate material; CR85, CR60, CR50, CR40, CR15 particulate material is with chromoxide green and aluminum oxide powder for raw material, according to Cr
2o
3and Al
2o
3ratio prepare, use large-scale pallet car type three-phawse arc furnace to carry out electric smelting, obtained different composition Cr
2o
3-Al
2o
3electric smelting particulate material.These particulate material have uniform chemical constitution.
Document (CN201310706638.8, a kind of microporous structure Al
2o
3-Cr
2o
3refractory materials) disclose one there is microporous structure Al
2o
3-Cr
2o
3refractory materials.It is that raw material spray method obtains Al by chromoxide green micro mist and alumina powder
2o
3-Cr
2o
3granulation material; Then will sinter or electric smelting chromic oxide, sintering or fused alumina, Al
2o
3-Cr
2o
3granulation material and additive carry out fully blending together matrix in advance; Again by electric smelting or alundum particle, electric smelting or sintering Al
2o
3-Cr
2o
3particle, electric smelting or sintering oxidation chromium particle, bonding agent, be mixed together with matrix mixed in advance and stir; Adopt hydropress or friction press to be pressed into base substrate after bundle material, after 60 ~ 110 DEG C of dryings, load 1550 DEG C ~ 1750 DEG C, kiln and burn till, obtained microporous structure Al
2o
3-Cr
2o
3refractory materials.Al no matter prepared by it
2o
3-Cr
2o
3granulation material, or the electric smelting used or sintering Al
2o
3-Cr
2o
3particle is also the material with evening chemical composition.
Document (CN201110273942.3, a kind of Cr of inhomogeneous structure
2o
3-Al
2o
3refractory materials) disclose a kind of employing with pre-synthesis Cr
2o
3-Al
2o
3refractory particle is that Cr prepared by raw material
2o
3-Al
2o
3the technology of refractory materials.This technology proposes coarse particles and adopts Cr
2o
3low electric smelting or sintering Cr
2o
3-Al
2o
3particle, fine particle and matrix adopt Cr
2o
3high electric smelting or sintering Cr
2o
3-Al
2o
3particle or fine powder, can solve slag preferably to the nonsynchronous problem of material corrosion, improve the utilising efficiency of raw material largely.This pre-synthesis Cr
2o
3-Al
2o
3refractory particle is prepared by electric smelting method or sintering process, and it has the uniform feature of chemical composition.
A large amount of industrial applications practice and laboratory anti-slag experimental result find, high-temperature slag is to Al
2o
3-Cr
2o
3the erosion of refractory materials is heterogeneous, Cr
2o
3component content is more low to be more easily etched, and grain diameter is more little to be more easily etched.The erosion of slag to particle is ecto-entad, and namely eroded particles is surperficial at first, then slowly infiltrates to granule interior.Usual granulated aggregate is not corroded completely just to have peeled off with the matrix of damaging by slag and is involved in slag.Therefore, for Al
2o
3-Cr
2o
3refractory materials, particles of aggregates exists in slag-resistant erosion " performance is superfluous ".Therefore, existing Al
2o
3-Cr
2o
3the aggregate of refractory materials adopts Cr
2o
3higher and the Al of even structure of content
2o
3-Cr
2o
3electric smelting or sintered particles are that aggregate is wasted one's talent on a petty job a bit, cause Cr
2o
3the waste of resource.
Summary of the invention
By to traditional Al
2o
3-Cr
2o
3the analysis of refractory product mesostroma and aggregate damage mechanism, we think Al
2o
3-Cr
2o
3the matching of refractory materials damage speed entirety reduces the effective way of chromium resource waste; The object of the invention is to propose a kind of Al
2o
3-Cr
2o
3refractory product, these goods have the feature of high anti-slag, low cost, the overall Cr of goods
2o
3content not high, but slag resistance can with high Cr
2o
3goods match in excellence or beauty, by easily corroding the reinforcement of component in goods and not easily corroding the weakening of component, make whole Al
2o
3-Cr
2o
3in refractory product, the slag resistance coupling of each component, accomplishes to make the best use of everything, effectively improves Cr
2o
3effective utilization of raw material, reduces Al
2o
3-Cr
2o
3raw material for refractory cost, reduces chromium indirectly to the pollution of environment.
Completing the technical scheme that task of the present invention takes is: a kind of Al
2o
3-Cr
2o
3refractory product, Cr
2o
3and Al
2o
3quality sum be not less than Al
2o
3-Cr
2o
390% of refractory product total mass, and Cr
2o
3quality be Al
2o
3-Cr
2o
320% ~ 65% of refractory product total mass; Be with particle diameter be greater than 0.074mm containing Cr
2o
3and Al
2o
3the composite grain of composition be aggregate and with particle diameter be less than or equal to 0.074mm containing Cr
2o
3and Al
2o
3the powder mix of composition is powder, adds bonding agent, forms after compression moulding through high-temperature firing; Aggregate accounts for 60% ~ 70% of described goods total mass, and powder accounts for 30% ~ 40% of described goods total mass; It is characterized in that: described Al
2o
3-Cr
2o
3containing heterogeneous Al in the aggregate of refractory product
2o
3-Cr
2o
3particle, described heterogeneous Al
2o
3-Cr
2o
3particle is a kind of artificial-synthetic material, has uneven chemical constitution, described heterogeneous Al
2o
3-Cr
2o
3the centre Cr of particle
2o
3content is lower than the Cr of edge
2o
3content; Described heterogeneous Al
2o
3-Cr
2o
3the particle diameter of particle is less than or equal to 5mm for being greater than 1mm; Described heterogeneous Al
2o
3-Cr
2o
3granular mass is 50% ~ 90% of whole aggregate total mass; Described heterogeneous Al
2o
3-Cr
2o
3cr in particle
2o
3quality is heterogeneous Al
2o
3-Cr
2o
35% ~ 50% of granular mass; Described Al
2o
3-Cr
2o
3in the aggregate of refractory product, the Al containing homogeneous
2o
3-Cr
2o
3particle or Cr
2o
3particle, the Al of homogeneous
2o
3-Cr
2o
3particle or Cr
2o
3grain diameter is less than or equal to 1mm and is greater than 0.074mm.
Described Al
2o
3-Cr
2o
3refractory product, is characterized in that described heterogeneous Al
2o
3-Cr
2o
3particle is a kind of sintered material, is by containing Cr
2o
3the coated Cr of powder of composition
2o
3content is lower than powder Cr
2o
3the particle of content or not containing Cr
2o
3the particle of composition obtains through high temperature sintering process; By containing Cr
2o
3the edge of the pellet of the powder formation of composition, by not containing Cr
2o
3particle or Cr
2o
3content is lower than powder Cr
2o
3the granulated of content becomes the centre of pellet, the Cr in pellet centre
2o
3content is lower than pellet edge Cr
2o
3content.
Al
2o
3-Cr
2o
3refractory product uses mainly as fire-resistant working lining, and slag resistance is its core performance assessment criteria.Generally, slag does not also invade Al
2o
3-Cr
2o
3aggregate center, particle departs from from article substrate already, the thus higher Cr of granular center
2o
3it is waste.For improving Al
2o
3-Cr
2o
3the density of refractory product and comprehensive physical performance, require that the particle diameter of aggregate has continous way distribution, according to the general requirement of monolith articles size, the maximum aggregate size that application claims makes goods is not more than 8mm.In application claims goods aggregate, particle diameter is greater than the aggregate that 1mm is less than or equal to 5mm is heterogeneous Al
2o
3-Cr
2o
3particle, considers based on different-grain diameter aggregate slagging of retractory speed difference; More than 5mm below 8mm aggregate adopts Al
2o
3particle, more than 0.074mm below 1mm aggregate adopts the Al of homogeneous
2o
3-Cr
2o
3particle or Cr
2o
3particle, can ensure the slag resistance of goods entirety, has greatly saved Cr simultaneously
2o
3resource.
A kind of Al
2o
3-Cr
2o
3refractory product, is characterized in that described heterogeneous Al
2o
3-Cr
2o
3particle, its Cr
2o
3and Al
2o
3quality sum is not less than heterogeneous Al
2o
3-Cr
2o
3particle total mass 95%, wherein, Cr
2o
3quality be heterogeneous body Al
2o
3-Cr
2o
35% ~ 50% of particle total mass.Al
2o
3and Cr
2o
3continuous solid solution can be formed, Cr in sosoloid under high temperature
2o
3composition is higher, and its resistance to slag corrosion is better.
The preparation technology that the present invention takes is as follows: the mixing homogenizing of first carrying out powder; Then, aggregate is placed in mixer and adds bonding agent stirring; The add-on of bonding agent is the 3-4.5% of aggregate and powder quality sum, then is poured into by the powder after homogenizing and be stained with in the aggregate of bonding agent, obtained pug after fully stirring; Pug is pressed into base substrate after ageing mixture, and base substrate is after more than 110 DEG C dryings, and 1600 DEG C ~ 1800 DEG C are burnt till, obtain described goods.
A kind of Al
2o
3-Cr
2o
3refractory product, powder can be the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the homogeneous Al that 74 μm are greater than 10 μm
2o
3-Cr
2o
3the mixture of fine powder;
Or,
Powder can be the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the Cr that 74 μm are greater than 10 μm
2o
3the mixture of fine powder;
Or,
Powder can be the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al that 74 μm are greater than 10 μm
2o
3the mixture of fine powder.
The ZrO of 10 μm can be less than or equal to containing particle diameter in described powder
2micro mist, ZrO
2mass percent is 3% ~ 7% of goods total mass.
Aggregate is the heterogeneous body Al that particle diameter is greater than 1mm and is less than or equal to 5mm
2o
3-Cr
2o
3particle, particle diameter are greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3the mixture of particle; Or be greater than the heterogeneous body Al that 1mm is less than or equal to 5mm for particle diameter
2o
3-Cr
2o
3particle, particle diameter are greater than the Cr that 0.074mm is less than or equal to 1mm
2o
3the mixture of particle.
Can also be less than or equal to containing particle diameter the Al that 8mm is greater than 5mm in aggregate
2o
3particle
.
Bonding agent can be the PVA aqueous solution or resol spirituous solution.
At high temperature slag is to Al
2o
3-Cr
2o
3there are 3 features in the damage of refractory product: 1) erosion of aggregate is slowly carried out from the surface to the internal; 2) Corrosion rate of slag to size particles there are differences, and the larger Corrosion rate of grain diameter is lower; 3) Cr
2o
3composition slag resistance is significantly better than Al
2o
3composition, Cr
2o
3the position that constituent concentration is higher is more not easy the erosion suffering slag.Slag is to Al
2o
3-Cr
2o
3the entirety damage speed of refractory product determines by damaging the fastest position of speed.Therefore, for the Al taking homogeneous particle as aggregate
2o
3-Cr
2o
3refractory product is usually by improving Cr in material
2o
3the whole content of content improves slag resistance.
With overall Cr
2o
3the common Al that content is suitable
2o
3-Cr
2o
3refractory product is compared, Al of the present invention
2o
3-Cr
2o
3refractory product, has more excellent high temperature resistance slag corrosion.This is because: for the Al of homogeneous aggregate composition
2o
3-Cr
2o
3refractory product, identical Cr
2o
3the matrix and particle surface Cr that easily corrode must be caused under content
2o
3content is relatively low, and in whole material, aggressiveness exists " short slab ", and the overall resistance to fouling of goods is poor.Al of the present invention
2o
3-Cr
2o
3refractory product, because its each position has chemical constitution heterogeneous, as the particle top layer Cr of aggregate
2o
3component content is high, and corrosion resistance is strong, granular center Cr
2o
3component content is low or do not contain Cr
2o
3composition, reduces Cr
2o
3overall consumption, make again " using the best steel to make the knife's edge ", improve Al
2o
3-Cr
2o
3the cost performance of refractory product.
Relative with prior art, the present invention can make Cr
2o
3raw material obtains efficient and rational utilization, improves Al
2o
3-Cr
2o
3the overall utilization rate of refractory product.Compare same Cr
2o
3the Al that content is prepared with prior art
2o
3-Cr
2o
3refractory product, the present invention can make the slag resistance of material significantly promote, and as the working lining materials'use with slag contacts, its bulk life time can promote more than 1 times.If the Al that processability is suitable
2o
3-Cr
2o
3refractory product, the present invention can save Cr
2o
3raw material more than 30%.
Embodiment
In conjunction with the embodiment provided, the present invention is illustrated, but does not form any limitation of the invention.
Embodiment 1:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 100%, Cr
2o
3mass percent be 25%; Have uneven chemical constitution, centre is hardly containing Cr
2o
3composition, edge Cr
2o
3content is about 50%; Its particle diameter is be greater than the particle that 1mm is less than or equal to 5mm.
Taking particle diameter is respectively be greater than the homogeneous electric smelting Al that 10 μm are less than or equal to 74 μm
2o
3-Cr
2o
3fine powder (Cr
2o
3≈ 90%) 15kg, particle diameter be less than or equal to the Cr of 10 μm
2o
3micro mist (Cr
2o
3>=99.5%) 10kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 10kg, through the abundant premix of ball mill, is prepared into powder; Taking particle diameter is respectively be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 50kg, be greater than the homogeneous electric smelting Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 70%) 15kg, add in simpson mill, add in the aggregate of mixing massfraction be 5% the PVA aqueous solution be about 3kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1800 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 46.5%, apparent porosity 16%, rotary slag-resistance test-results is suitable with GB GGZ-75.
Embodiment 2:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 100%, Cr
2o
3mass percent be 50%; There is uneven chemical constitution, from grain edges to center Cr
2o
3content has Gradient distribution, centre Cr
2o
3content is about 33.5%, edge Cr
2o
3content is about 99%; Its particle diameter is less than or equal to 5mm for being greater than 1mm, and void content is 5%.
Taking particle diameter is respectively be greater than the Cr that 10 μm are less than or equal to 74 μm
2o
3fine powder (Cr
2o
3≈ 99%) 16.5kg, particle diameter be less than or equal to the Cr of 10 μm
2o
3micro mist 10kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 3.5kg, through the abundant premix of ball mill, is prepared into uniform powder; Taking particle diameter is be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 63kg, be greater than the Cr that 0.074mm is less than or equal to 1mm
2o
3particle (Cr
2o
3≈ 99%) 7kg, add simpson mill, add in aggregate massfraction be 5% the PVA aqueous solution be about 3kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1700 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 65%, apparent porosity 15.5%, rotary slag-resistance test-results is suitable with GB GGZ-90.
Embodiment 3:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 95%, Cr
2o
3mass percent be 5%; There is uneven chemical constitution, from grain edges to center Cr
2o
3content has Gradient distribution, and centre is not containing Cr
2o
3composition, edge Cr
2o
3content is about 10%; Its particle diameter is less than or equal to 5mm for being greater than 1mm; The void content of this refractory particle is 4%.
Take particle diameter respectively and be greater than the Al that 10 μm are less than or equal to 74 μm
2o
3fine powder 8kg, particle diameter are be less than or equal to the Cr of 10 μm
2o
3micro mist 20kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 5kg, particle diameter are be less than or equal to the ZrO of 10 μm
2micro mist 7kg, through the abundant premix of ball mill, is prepared into uniform powder; Take particle diameter and be greater than the Al that 5mm is less than or equal to 8mm
2o
3particle 15kg, be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 32.5kg, be greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 30%) 12.5kg, add simpson mill, add in the aggregate of mixing massfraction be 5% the PVA aqueous solution be about 3kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1600 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 25%, apparent porosity 15%, has good slag resistance.
Embodiment 4:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 100%, Cr
2o
3mass percent be 29%; There is uneven chemical constitution, grains edge C r
2o
3content far above granular center position, centre Cr
2o
3content is about 10%, edge Cr
2o
3content is about 57.5%; Its particle diameter is less than or equal to 5mm for being greater than 1mm, and void content is 3%.
Take particle diameter respectively and be greater than the homogeneous Al that 10 μm are less than or equal to 74 μm
2o
3-Cr
2o
3fine powder (Cr
2o
3=80%) 15kg, particle diameter are be less than or equal to the Cr of 10 μm
2o
3micro mist (Cr
2o
3>=99.5%) 10kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 5kg, through the abundant premix of ball mill, is prepared into uniform powder; Take particle diameter and be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 58kg, be greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 60%) 12kg, add in simpson mill, add in aggregate massfraction be 50% resol spirituous solution be about 3.5kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1750 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 46%, apparent porosity 14.5%, has good slag resistance.
Embodiment 5:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 97.5%, Cr
2o
3mass percent be 10%; There is uneven chemical constitution, from grain edges to center Cr
2o
3content has Gradient distribution, and centre is not containing Cr
2o
3composition, edge Cr
2o
3content is about 20%; Its particle diameter is less than or equal to 5mm for being greater than 1mm, and void content is 5%.
Take particle diameter respectively and be greater than the Al that 10 μm are less than or equal to 74 μm
2o
3fine powder 5.5kg, particle diameter are be less than or equal to the Cr of 10 μm
2o
3micro mist 14.5kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 10kg, particle diameter are be less than or equal to the ZrO of 10 μm
2micro mist 5kg, through the abundant premix of ball mill, is prepared into powder; Take particle diameter and be greater than the Al that 5mm is less than or equal to 8mm
2o
3particle 25kg, be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 32.5kg, be greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 30%) 7.5kg, add in simpson mill, add in aggregate massfraction be 5% the PVA aqueous solution be about 3kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1650 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 20%, apparent porosity 15%, has good slag resistance, and crucible method parallel anti-slag test-results shows that this goods slag resistance is 2 times of common chrome corundum brick Cr-30.
Embodiment 6:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 97.5%, Cr
2o
3mass percent be 23.5%; Having uneven chemical constitution, is by Cr
2o
3powder parcel corundum in granules forms through high-temperature firing, and centre is not containing Cr
2o
3composition, edge Cr
2o
3content is about 99%; Its particle diameter is less than or equal to 5mm for being greater than 1mm, and void content is 5%.
Take particle diameter respectively and be greater than the Al that 10 μm are less than or equal to 74 μm
2o
3fine powder 5kg, particle diameter are be less than or equal to the Cr of 10 μm
2o
3micro mist 20kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 10kg, through the abundant premix of ball mill, is prepared into powder; Take particle diameter and be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 58.5kg, be greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 75%) 6.5kg, add in simpson mill, in aggregate, add the resol spirituous solution 3.5kg that massfraction is 50%, after stirring, add the powder after premix, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1750 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 38.5%, apparent porosity 15%, rotary slag-resistance test-results is suitable with GB GGZ-75.
Embodiment 7:
As the heterogeneous body Al of one of raw material
2o
3-Cr
2o
3cr in particle
2o
3and Al
2o
3mass percent with about 100%, Cr
2o
3mass percent be 39.2%; There is uneven chemical constitution, from grain edges to center Cr
2o
3content has Gradient distribution, and some granular center positions are not containing Cr
2o
3composition, some granular center position Cr
2o
3content is about 10%, edge Cr
2o
3content is about 73%; Its particle diameter is less than or equal to 5mm for being greater than 1mm, and void content is 10%.
Take particle diameter respectively and be greater than the homogeneous Al that 10 μm are less than or equal to 74 μm
2o
3-Cr
2o
3fine powder (Cr
2o
3≈ 90%) 12kg, particle diameter be less than or equal to the Cr of 10 μm
2o
3micro mist 20kg, particle diameter are be less than or equal to the Al of 10 μm
2o
3micro mist 5kg, particle diameter are be less than or equal to the ZrO of 10 μm
2micro mist 3kg, through the abundant premix of ball mill, is prepared into powder; Take particle diameter and be greater than the heterogeneous body Al that 1mm is less than or equal to the synthetic of 5mm
2o
3-Cr
2o
3particle 50kg, be greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3particle (Cr
2o
3≈ 90%) 10kg, add in simpson mill, add in aggregate massfraction be 50% resol spirituous solution be about 4.5kg, add the powder after premix after stirring, fully after mixing, ageing mixture; Friction press molding blank, after 110 DEG C of dryings, loads normal pressure shuttle firing kiln 1750 DEG C and burns till, obtain Al
2o
3-Cr
2o
3refractory product.These goods Cr
2o
3≈ 60%, apparent porosity 17%, rotary slag-resistance test-results is suitable with GB GGZ-85.
Claims (7)
1. an Al
2o
3-Cr
2o
3refractory product, Cr
2o
3and Al
2o
3quality sum be not less than Al
2o
3-Cr
2o
390% of refractory product total mass, and Cr
2o
3quality be Al
2o
3-Cr
2o
320% ~ 65% of refractory product total mass; Be with particle diameter be greater than 0.074mm containing Cr
2o
3and Al
2o
3the composite grain of composition be aggregate and with particle diameter be less than or equal to 0.074mm containing Cr
2o
3and Al
2o
3the powder mix of composition is powder, adds bonding agent, forms after compression moulding through high-temperature firing; Aggregate accounts for 60% ~ 70% of described goods total mass, and powder accounts for 30% ~ 40% of described goods total mass; It is characterized in that: described Al
2o
3-Cr
2o
3containing heterogeneous Al in the aggregate of refractory product
2o
3-Cr
2o
3particle, described heterogeneous Al
2o
3-Cr
2o
3particle is a kind of artificial-synthetic material, has uneven chemical constitution, described heterogeneous Al
2o
3-Cr
2o
3the centre Cr of particle
2o
3content is lower than the Cr of edge
2o
3content; Described heterogeneous Al
2o
3-Cr
2o
3the particle diameter of particle is less than or equal to 5mm for being greater than 1mm; Described heterogeneous Al
2o
3-Cr
2o
3granular mass is 50% ~ 90% of whole aggregate total mass; Described heterogeneous Al
2o
3-Cr
2o
3cr in particle
2o
3quality is heterogeneous Al
2o
3-Cr
2o
35% ~ 50% of granular mass; Described Al
2o
3-Cr
2o
3in the aggregate of refractory product, the Al containing homogeneous
2o
3-Cr
2o
3particle or Cr
2o
3particle, the Al of homogeneous
2o
3-Cr
2o
3particle or Cr
2o
3grain diameter is less than or equal to 1mm and is greater than 0.074mm.
2. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, is characterized in that described heterogeneous Al
2o
3-Cr
2o
3particle is a kind of sintered material, is by containing Cr
2o
3the coated Cr of powder of composition
2o
3content is lower than powder Cr
2o
3the particle of content or not containing Cr
2o
3the particle of composition obtains through high temperature sintering process; By containing Cr
2o
3the edge of the pellet of the powder formation of composition, by not containing Cr
2o
3particle or Cr
2o
3content is lower than powder Cr
2o
3the granulated of content becomes the centre of pellet, the Cr in pellet centre
2o
3content is lower than pellet edge Cr
2o
3content.
3. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, is characterized in that described heterogeneous Al
2o
3-Cr
2o
3particle, its Cr
2o
3and Al
2o
3quality sum is not less than heterogeneous Al
2o
3-Cr
2o
3particle total mass 95%, wherein, Cr
2o
3quality be heterogeneous body Al
2o
3-Cr
2o
35% ~ 50% of particle total mass.
4. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, is characterized in that powder is the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the homogeneous Al that 74 μm are greater than 10 μm
2o
3-Cr
2o
3the mixture of fine powder;
Or,
Powder is the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the Cr that 74 μm are greater than 10 μm
2o
3the mixture of fine powder;
Or,
Powder is the Cr that particle diameter is less than or equal to 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al of 10 μm
2o
3micro mist, particle diameter are less than or equal to the Al that 74 μm are greater than 10 μm
2o
3the mixture of fine powder.
5. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, is characterized in that the ZrO being less than or equal to 10 μm in described powder containing particle diameter
2micro mist, ZrO
2quality is 3% ~ 7% of goods total mass.
6. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, is characterized in that aggregate is the heterogeneous body Al that particle diameter is greater than 1mm and is less than or equal to 5mm
2o
3-Cr
2o
3particle, particle diameter are greater than the homogeneous Al that 0.074mm is less than or equal to 1mm
2o
3-Cr
2o
3the mixture of particle; Or aggregate is the heterogeneous body Al that particle diameter is greater than 1mm and is less than or equal to 5mm
2o
3-Cr
2o
3particle, particle diameter are greater than the Cr that 0.074mm is less than or equal to 1mm
2o
3the mixture of particle.
7. a kind of Al as claimed in claim 1
2o
3-Cr
2o
3refractory product, to is characterized in that in aggregate being also less than or equal to containing particle diameter the Al that 8mm is greater than 5mm
2o
3particle
.
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CN114315323A (en) * | 2022-02-23 | 2022-04-12 | 中钢集团洛阳耐火材料研究院有限公司 | Al with chrome corundum as aggregate2O3-Cr2O3Refractory product |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102079652A (en) * | 2010-11-22 | 2011-06-01 | 武汉科技大学 | High thermal shock resisting Cr2O3-Al2O3-ZrO2 brick and production method thereof |
CN102417361A (en) * | 2011-09-16 | 2012-04-18 | 中钢集团洛阳耐火材料研究院有限公司 | Cr2O3-Al2O3 refractory material of anisotropic structure |
CN103693981A (en) * | 2013-12-20 | 2014-04-02 | 中钢集团洛阳耐火材料研究院有限公司 | Al2O3-Cr2O3 refractory material having microporous structure |
CN103708844A (en) * | 2013-12-20 | 2014-04-09 | 中钢集团洛阳耐火材料研究院有限公司 | Al2O3-Cr2O3 refractory product and preparation method thereof |
-
2014
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102079652A (en) * | 2010-11-22 | 2011-06-01 | 武汉科技大学 | High thermal shock resisting Cr2O3-Al2O3-ZrO2 brick and production method thereof |
CN102417361A (en) * | 2011-09-16 | 2012-04-18 | 中钢集团洛阳耐火材料研究院有限公司 | Cr2O3-Al2O3 refractory material of anisotropic structure |
CN103693981A (en) * | 2013-12-20 | 2014-04-02 | 中钢集团洛阳耐火材料研究院有限公司 | Al2O3-Cr2O3 refractory material having microporous structure |
CN103708844A (en) * | 2013-12-20 | 2014-04-09 | 中钢集团洛阳耐火材料研究院有限公司 | Al2O3-Cr2O3 refractory product and preparation method thereof |
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