CN109265151A - Low zirconia-chromia corundum brick and preparation method thereof - Google Patents
Low zirconia-chromia corundum brick and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of low zirconia-chromia corundum bricks and preparation method thereof.The low zirconia-chromia corundum brick includes each raw material component of following mass percent, aggregate 60-80%, mixture 30-33% and additive 0.2-5.0%；It includes following mass percent each raw material component: chromium oxide powder 10%-70% and alumina powder 90-30% that the bone meal, which is pressed,；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: the aggregate monomer 39% of partial size 2mm-4mm, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm the aggregate monomer 40%；Mixture includes following mass percent each raw material component: chromium oxide powder 5-50%, corundum ball powder 10-40%, alumina powder 1-10% and powder bonding agent 1-3%.Low zirconia-chromia corundum brick refractoriness under load is high for this, is not easy to peel off cracking to improve kiln service life.
Description
Technical field
The present invention relates to a kind of low zirconia-chromia corundum bricks and preparation method thereof.
Background technique
The checker brick of the flue of glass fibre tank furnace are currently used in mainly with containing Zr refractory material or containing the fire resisting of chromium
What material was prepared, the use refractoriness under load of the checker brick is low, is easy to peel off cracking blocking flue, anti-glass melting alkali
Vapours attack is poor, so that the lost of life of kiln.
Summary of the invention
Based on this, it is necessary to provide that a kind of refractoriness under load is high, is not easy to peel off cracking to improve kiln service life
Low zirconia-chromia corundum brick and preparation method thereof.
A kind of low zirconia-chromia corundum brick, the low zirconia-chromia corundum brick prepare each raw material that raw material includes following mass percent
Component: aggregate 65%-74% and mixture 26%-35%；
The aggregate presses each raw material component including following mass percent:
Chromium oxide powder 10%-70%, and
Alumina powder 30%-90%；Wherein, in the aggregate aggregate monomer of different-grain diameter mass percent are as follows: grain
The institute of the aggregate monomer 39% of diameter 2mm-4mm, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm
State aggregate monomer 40%；
The mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%-68%,
Corundum ball powder 17%-63%,
Alumina powder 13%-20%, and
Powder bonding agent 2%-5%.
The low zirconia-chromia corundum brick prepares each original that raw material includes following mass percent in one of the embodiments,
Expect component: aggregate 65%-74% and mixture 26%-35%；
The aggregate presses each raw material component including following mass percent:
Chromium oxide powder 21%-68%, and
Alumina powder 32%-79%；
The mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%-68%,
Corundum ball powder 17%-63%,
Alumina powder 13%-20%, and
Powder bonding agent 2%-5%.
The low zirconia-chromia corundum brick prepares each original that raw material includes following mass percent in one of the embodiments,
Expect component: aggregate 65%-74% and mixture 26%-35%；
The aggregate presses each raw material component including following mass percent:
Chromium oxide powder 21%-68%, and
Alumina powder 32%-79%；
The mixture includes each raw material component of following mass percent:
Chromium oxide powder 20%-60%,
Corundum ball powder 17%-63%,
Alumina powder 15%-18%, and
Powder bonding agent 2%-5%.
The powder bonding agent is industrial dextrin, carboxymethyl cellulose, starch and wooden in one of the embodiments,
One of plain sulfoacid calcium is a variety of；The additive is in spent pulping liquor, silica solution, waterglass, gummy liquid and peach colloidal solution
It is one or more.
In one of the embodiments, the corundum ball powder be sintering plate diamond spar, electric smelting white fused alumina ball powder and
One of alpha-oxidation aluminium ball powder is a variety of.
A kind of preparation method of the low zirconia-chromia corundum brick, which comprises the steps of:
It prepares aggregate: taking chromium oxide powder and alumina powder, it is successively ground after mixing, pressure filtration molding, calcining
And crush, form the aggregate；
It prepares mixture: taking chromium oxide powder, corundum ball powder, alumina powder and powder bonding agent, be uniformly mixed and obtain
The mixture；
Preparation stirring intermediate: the aggregate additive is soaked and is stirring evenly and then adding into the mixture, is stirred
Uniformly obtain stirring intermediate；
Preparation molding intermediate: the stirring intermediate compression moulding is formed into molding intermediate；
It prepares low zirconia-chromia corundum brick: molding intermediate progress high temperature being formed by a firing, forming by a firing temperature is 1400
DEG C -1700 DEG C, soaking time is 3h-60h to get the low zirconia-chromia corundum brick.
When preparing aggregate in one of the embodiments, the quality percentage of the aggregate monomer of different-grain diameter in the aggregate
The aggregate monomer 21%, the partial size 0.5mm- of the aggregate monomer 39%, partial size 1mm-2mm than are as follows: partial size 2mm-4mm
The aggregate monomer 40% of 1mm specifically comprises the following steps: when preparing the stirring intermediate by partial size to be 2mm-4mm
The aggregate monomer, the aggregate monomer that partial size is 1mm-2mm soaked with the additive and after mixing evenly, addition grain
Diameter is that the aggregate monomer of 0.5mm-1mm stirs evenly, and is eventually adding the mixture, is uniformly mixing to obtain the stirring
Intermediate.
It prepares aggregate in one of the embodiments, to specifically include: by chromium oxide described in vertical mixing mill wet grinding
Powder and the alumina powder are squeezed into after the abrasive slurry filters pressing is configured to mud cake to granularity≤10 μm of abrasive slurry
The mud item of plasticity；The mud item is after natural air drying and 100 DEG C of -200 DEG C of temperature are dry by 1000 DEG C -1700 of tunnel oven
DEG C high-temperature calcination crushes after cooling kiln discharge, forms the institute that partial size is respectively 2mm-4mm, 1mm-2mm and 0.5mm-1mm to roller
State aggregate monomer.
The mud cake is squeezed into the mud item of plasticity with vacuum deairing machine pugging in one of the embodiments,.
When preparing stirring intermediate in one of the embodiments, partial size is the aggregate monomer, the partial size of 2mm-4mm
For 1mm-2mm the aggregate monomer with the additive soak stirring mixing time be 2min-3min, add partial size
Time for the stirring of 0.5mm-1mm aggregate monomer is 2min-3min, and the time that the mixture stirring is added is 5min-
20min。
When preparing molding intermediate in one of the embodiments, the stirring intermediate is cold by cold isostatic compaction
Hydrostatic pressure when isostatic pressing is 100MPa-300MPa, dwell time 5min-60min.
The lotus softening temperature of above-mentioned low zirconia-chromia corundum brick is high, is not easy to deform when using under hot environment, is not easy to peel off and open
It splits, energy conservation, anti-glass melting alkali vapours attack is stronger, and service performance is stablized.When above-mentioned low zirconia-chromia corundum brick is used for kiln,
The service life of kiln is high, and can reduce the maintenance cost of kiln.
Specific embodiment
The invention can be realized in many different forms, however it is not limited to embodiment described herein.On the contrary, mentioning
Purpose for these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The present invention provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 65%-74% and mixture 26%-35%；
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 10%-70%, and
Alumina powder 30%-90%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size
The aggregate monomer 39% of 2mm-4mm, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%-68%,
Corundum ball powder 17%-63%,
Alumina powder 13%-20%, and
Powder bonding agent 2%-5%；
Powder bonding agent is one of industrial dextrin, carboxymethyl cellulose, starch and calcium lignosulfonate or a variety of；
Additive is spent pulping liquor, silica solution, waterglass, gummy one of liquid and peach colloidal solution or a variety of.
Wherein, corundum ball powder be sintering plate diamond spar, electric smelting white fused alumina ball powder and in alpha-oxidation aluminium ball powder one
Kind is a variety of.
Embodiment 1
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 70% and mixture 30%.
Aggregate presses a each raw material component including following mass percent:
Chromium oxide powder 21%, and
Alumina powder 79%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 19%, the aggregate monomer 40% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 41%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%,
Corundum ball powder 60%,
Alumina powder 19%, and
Powder bonding agent 4%；
Powder bonding agent is industrial dextrin；
Additive is spent pulping liquor.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
The preparation method of low zirconia-chromia corundum brick, includes the following steps:
(1) it prepares aggregate: chromium oxide powder and alumina powder being taken according to above-mentioned formula, pass through vertical mixing mill wet grinding
Abrasive slurry filters pressing is configured to be practiced after mud cake with vacuum by chromium oxide powder and alumina powder to granularity≤10 μm of abrasive slurry
Mud machine pugging is squeezed into the mud item of plasticity；Mud item is after natural air drying and 100 DEG C of -200 DEG C of temperature are dry by tunnel oven
1000 DEG C of -1700 DEG C of high-temperature calcinations, crush after cooling kiln discharge, roller is formed partial size be respectively 2mm-4mm, 1mm-2mm and
The aggregate monomer of 0.5mm-1mm, the mass percent of the aggregate monomer of different-grain diameter in aggregate are as follows: the aggregate of partial size 2mm-4mm
Monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%.
(2) it prepares mixture: taking chromium oxide powder, corundum ball powder, alumina powder and powder to combine according to above-mentioned formula
Agent is uniformly mixed and obtains mixture.
(3) preparation stirring intermediate: by partial size be 2mm-4mm aggregate monomer and partial size be 1mm-2mm aggregate list
Body additive soaks and stirs 2min-3min to aggregate monomer stirring 2min- uniform, that addition partial size is 0.5mm-1mm
3min is eventually adding mixture to uniform, and stirring 5min-20min is to uniformly obtaining stirring intermediate.
(4) preparation molding intermediate: by stirring intermediate by 200 tons of -2000 tons of friction press mechanical pressings with shape
At molding intermediate, or by cold isostatic compaction to form molding intermediate.Wherein, equal static pressure when cold isostatic compaction
Pressure is 100MPa-300MPa, dwell time 5min-60min.
(5) it prepares low zirconia-chromia corundum brick: molding intermediate being subjected to high temperature and is formed by a firing, forming by a firing temperature is 1400 DEG C
- 1700 DEG C, soaking time is 3h-60h to get low zirconia-chromia corundum brick.
(6) performance detection is carried out to low zirconia-chromia corundum brick.
Embodiment 2
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 65% and mixture 35%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 42%, and
Alumina powder 58%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 60%,
Corundum ball powder 23%,
Alumina powder 13%, and
Powder bonding agent 4%；
Powder bonding agent is industrial dextrin；
Additive is spent pulping liquor.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Embodiment 3
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 74% and mixture 26%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 68%, and
Alumina powder 32%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 68%,
Corundum ball powder 17%,
Alumina powder 13%, and
Powder bonding agent 2%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Embodiment 4
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 74% and mixture 26%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 10%, and
Alumina powder 90%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%,
Corundum ball powder 63%,
Alumina powder 18%, and
Powder bonding agent 2%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Embodiment 5
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 74% and mixture 26%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 30%, and
Alumina powder 70%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 35%,
Corundum ball powder 41%,
Alumina powder 19%, and
Powder bonding agent 5%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Embodiment 6
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 74% and mixture 26%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 56.5%, and
Alumina powder 43.5%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-
The aggregate monomer 39% of 4mm, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 20%,
Corundum ball powder 63%,
Alumina powder 15%, and
Powder bonding agent 2%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Comparative example 1
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 74% and mixture 26%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 56.5%, and
Alumina powder 43.5%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-
The aggregate monomer 100% of 4mm；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 20%,
Corundum ball powder 63%,
Alumina powder 15%, and
Powder bonding agent 2%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Comparative example 2
The present embodiment provides a kind of low zirconia-chromia corundum brick, the raw material for preparing of low zirconia-chromia corundum brick includes following mass percent
Each raw material component: aggregate 30% and mixture 80%.
Aggregate presses each raw material component including following mass percent:
Chromium oxide powder 80%, and
Alumina powder 20%；Wherein, in aggregate the aggregate monomer of different-grain diameter mass percent are as follows: partial size 2mm-4mm
Aggregate monomer 39%, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm aggregate monomer 40%；
Mixture includes each raw material component of following mass percent:
Chromium oxide powder 10%,
Corundum ball powder 70%,
Alumina powder 18%, and
Powder bonding agent 2%；
Powder bonding agent is industrial dextrin；
Additive is waterglass.
Wherein, corundum ball powder is the plate diamond spar of sintering.The raw material of the present embodiment derives from commercially available raw material.
Low zirconia-chromia corundum brick is prepared according to the preparation method of the low zirconia-chromia corundum brick in embodiment 1.
Under thermal shock resistance and static state to above embodiments 1-6 and comparative example the 1-2 low zirconia-chromia corundum brick being prepared
The performance that anti-glass metal corrodes is detected, in which:
(1) the execution standard of anti-glass metal erosion performance test is GB 10204-1988 under static state, is specifically included:
Take low zirconia-chromia corundum brick obtained by above embodiments as specimen sample, specimen sample specification for (10 ± 0.05) mm ×
(10 ±0.05)mm×(70±0.5)mm；Test glass is E glass, 1250 DEG C of test temperature, keeps the temperature 72h, measures metal line
Erosion amount is G, and erosion amount is H at half under measurement metal line.
(2) it is company standard that the detection of thermal shock resistance, which executes standard, and the concrete operations of the said firm's standard include:
Take low zirconia-chromia corundum brick obtained by above embodiments 1-6 as specimen sample, specimen sample specification is (114 ± 0.5)
mm× (40±0.5)mm×(40±0.5)mm；Thermal shock resistance is tested referring to following method:
(1) electric furnace is warming up to 1100 DEG C, keeps the temperature 30min；
(2) specimen sample is put into burner hearth, can not be stacked, sample gap is not less than 10mm, keeps the temperature 30min；
(3) 1. 2. step below preceding 5 repetitions, until sample fracture:
1. specimen sample is taken out, it is placed on the upper natural cooling 40min of iron plate；
2. being put into 1100 DEG C × 30min of electric furnace；
It is carried out the 6th time if specimen sample is not broken by step (4)；
(4) the 6th beginnings repeat following 1. 2. step, until sample fracture:
1. electric furnace cools down 5min after taking out into the water, then is placed on the upper 40min of iron plate；
2. being put into 1100 DEG C × 30min of electric furnace；
(5) sample is broken in furnace, then the number is disregarded；If specimen sample is broken or cools down into the water after taking out
Fracture is then calculated with 0.5 time.
Anti- glass metal is invaded under the thermal shock resistance and static state of the low zirconia-chromia corundum brick being prepared in embodiment 1- embodiment 6
The performance test results of erosion are as shown in the table.
Refractory material contains Cr2O3Amount is bigger, and erosion is smaller, and anti-glass attack performance is better, while Cr2O3Measure bigger, specific gravity
Bigger, bulk density is also bigger.
To sum up, the lotus softening temperature of above-mentioned low zirconia-chromia corundum brick is high, is not easy to deform when using under hot environment, is not easy to shell
Cracking is fallen, energy conservation, anti-glass melting alkali vapours attack is stronger, and service performance is stablized.Above-mentioned low zirconia-chromia corundum brick is used for kiln
When furnace, the service life of kiln is high, and can reduce the maintenance cost of kiln.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of low zirconia-chromia corundum brick, which is characterized in that the raw material for preparing of the low zirconia-chromia corundum brick includes following quality percentage
The each raw material component of ratio: aggregate 65%-74% and mixture 26%-35%；
The aggregate presses each raw material component including following mass percent:
Chromium oxide powder 10%-70%, and
Alumina powder 30%-90%；Wherein, in the aggregate aggregate monomer of different-grain diameter mass percent are as follows: partial size
The aggregate monomer 39% of 2mm-4mm, the aggregate monomer 21% of partial size 1mm-2mm, partial size 0.5mm-1mm the bone
Material list body 40%；
The mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%-68%,
Corundum ball powder 17%-63%,
Alumina powder 13%-20%, and
Powder bonding agent 2%-5%.
2. low zirconia-chromia corundum brick according to claim 1, which is characterized in that the low zirconia-chromia corundum brick prepares raw material packet
Include each raw material component of following mass percent: aggregate 65%-74% and mixture 26%-35%；
The aggregate presses each raw material component including following mass percent:
Chromium oxide powder 21%-68%, and
Alumina powder 32%-79%；
The mixture includes each raw material component of following mass percent:
Chromium oxide powder 17%-68%,
Corundum ball powder 17%-63%,
Alumina powder 13%-20%, and
Powder bonding agent 2%-5%.
3. low zirconia-chromia corundum brick according to claim 1, which is characterized in that the powder bonding agent is industrial dextrin, carboxylic
One of methylcellulose, starch and calcium lignosulfonate are a variety of；The additive is spent pulping liquor, silica solution, water
Glass, gummy one of liquid and peach colloidal solution or a variety of.
4. low zirconia-chromia corundum brick according to claim 1 to 3, which is characterized in that the corundum ball powder is sintering
Plate diamond spar, electric smelting white fused alumina ball powder and one of alpha-oxidation aluminium ball powder or a variety of.
5. a kind of preparation method of low zirconia-chromia corundum brick described in claim 1-4 any one, which is characterized in that including as follows
Step:
Prepare aggregate: taking chromium oxide powder and alumina powder, it is successively ground after mixing, pressure filtration molding, calcining and
It crushes, forms the aggregate；
It prepares mixture: taking chromium oxide powder, corundum ball powder, alumina powder and powder bonding agent, be uniformly mixed described in obtaining
Mixture；
Preparation stirring intermediate: the aggregate additive is soaked and is stirring evenly and then adding into the mixture, is stirred evenly
Obtain the stirring intermediate；
Preparation molding intermediate: the stirring intermediate compression moulding is formed into the molding intermediate；
Prepare low zirconia-chromia corundum brick: by the molding intermediate progress high temperature form by a firing, form by a firing temperature be 1400 DEG C-
1700 DEG C, soaking time is 3h-60h to get the low zirconia-chromia corundum brick.
6. the preparation method of low zirconia-chromia corundum brick according to claim 5, which is characterized in that when preparing aggregate, the bone
The mass percent of the aggregate monomer of different-grain diameter in material are as follows: the aggregate monomer 39%, the partial size 1mm- of partial size 2mm-4mm
The aggregate monomer 40% of the aggregate monomer 21% of 2mm, partial size 0.5mm-1mm；When preparing the stirring intermediate
Specifically comprise the following steps: be by partial size 2mm-4mm the aggregate monomer and partial size be 1mm-2mm the aggregate monomer
Soaked with the additive and after mixing evenly, partial size be added and is stirred evenly for the aggregate monomer of 0.5mm-1mm, finally plus
Enter the mixture, is uniformly mixing to obtain the stirring intermediate.
7. the preparation method of low zirconia-chromia corundum brick according to claim 6, which is characterized in that prepare aggregate and specifically include:
By chromium oxide powder described in vertical mixing mill wet grinding and the alumina powder to granularity≤10 μm of abrasive slurry, by institute
Abrasive slurry filters pressing is stated to be configured to be squeezed into the mud item of plasticity after mud cake；The mud item is through natural air drying and 100 DEG C -200
By 1000 DEG C of -1700 DEG C of high-temperature calcinations of tunnel oven after DEG C temperature is dry, crushes after cooling kiln discharge, forms partial size to roller and be respectively
The aggregate monomer of 2mm-4mm, 1mm-2mm and 0.5mm-1mm.
8. the preparation method of low zirconia-chromia corundum brick according to claim 7, which is characterized in that practice mud cake vacuum
Mud machine pugging is squeezed into the mud item of plasticity.
9. according to the preparation method of low zirconia-chromia corundum brick described in claim 6-8 any one, which is characterized in that preparation stirring
When intermediate, the aggregate monomer addition that the aggregate monomer and partial size that partial size is 2mm-4mm are 1mm-2mm
The mixing time of agent wetting stirring is 2min-3min, adds the time that the aggregate monomer that partial size is 0.5mm-1mm stirs
For 2min-3min, the time that the mixture stirring is added is 5min-20min.
10. according to the preparation method of low zirconia-chromia corundum brick described in claim 6-8 any one, which is characterized in that be prepared into
When type intermediate, for the stirring intermediate by cold isostatic compaction, hydrostatic pressure when cold isostatic compaction is 100MPa-
300MPa, dwell time 5min-60min.
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| CN112500139A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | High-strength anti-erosion ladle self-flow castable and preparation method thereof |
| CN112745108A (en) * | 2020-12-07 | 2021-05-04 | 北京金隅通达耐火技术有限公司 | High-density chromium corundum brick for hazardous waste disposal rotary kiln |
| CN112745109A (en) * | 2020-12-30 | 2021-05-04 | 巩义市新科耐火材料有限公司 | Production method of high-temperature anti-stripping chromium corundum brick |
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