CN110171961A - A kind of aluminium chrome-magnesite firebrick and preparation method thereof - Google Patents
A kind of aluminium chrome-magnesite firebrick and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/105—Refractories from grain sized mixtures containing chromium oxide or chrome ore
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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Abstract
The invention discloses a kind of glass industries and nonferrous industry aluminium chrome-magnesite firebrick and preparation method thereof.It is indicated with mass percentage, is formulated the sub-white corundum 30-10% by granularity 3-1mm；The aluminum-spinel 35-10% of granularity 2-1mm；The aluminum-spinel 15-5% of granularity 1-0.088mm；The aluminium chromium synthesis material 25-10% of granularity 1-0.088mm；Aluminium chromium synthesis material 40-25% of the granularity less than 0.088mm is formed.In addition, the bonding agent for accounting for above-mentioned all total mass of raw material 2-7% is added.Aluminium chrome-magnesite firebrick prepared by the present invention reduces the pollution of residual brick Cr VI, alleviate the problem of aluminium Cr materials anxiety, stablize with process for producing, it is high to manufacture qualification rate, the characteristics of corrosion resistance and good thermal shock stability, can obtain good effect for regenerator chamber of glass kiln or nonferrous industry rotary kiln.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of Lv Ge magnesia fire-protecting wall and preparation method thereof.
Background technique
Currently, glass melter regenerative chamber and part nonferrous industry kiln still mainly use basic refractory such as magnesite-chrome brick.
But kiln material or clinker are in neutrality even subacidity in some cases, and the corrosion resistance of basic refractory is with regard to very unsatisfactory.For example,
When glass furnace uses petroleum coke, because certain petroleum coke sulfur-bearings are higher, the sulfurbased NPK of kiln material is very high.For another example, certain zinc oxide are waved
The clinker of hair kiln is in neutrality.At this point, being better than magnesite-chrome brick if using the neutral refractory such as service life of alumina chrome brick.But this is again
Bring two problems.First, the waste residue aluminium chromium slag that alumina chrome brick uses aluminothermy legal system chromium to generate is as primary raw material, source is unstable
It is fixed.Second, part trivalent chromium conversion is toxic, carcinogenic Cr VI after alumina chrome brick is used, environment is polluted.
CN102603325A discloses a kind of regeneration magnesia-alumina-chromia brick and preparation method thereof, is original with aluminium chromium slag and useless magnesium brick
Material, it is cheap, solve problem of environmental pollution, but the impurity content in useless magnesium brick is more, material quality is uneven, causes
Product uses unstable quality, influences kiln whole service life.
Therefore, the present invention provides a kind of aluminium chrome-magnesite refractory with lower chromic oxide content, not only alleviates residual
Brick pollutes the problem of environment and aluminium chromium matter raw material anxiety, and with excellent performance, applied to regenerator chamber of glass kiln and certain has
Color kiln can reliably guarantee the running efficiency of kiln.
Summary of the invention
The technical problem to be solved by the present invention is 1) reduce the chromic oxide content of alumina chrome brick, that is, reduce aluminium chromium synthesis material (i.e.
Aluminium chromium slag) dosage；2) guarantee the corrosion resistance of refractory material, to guarantee the service life and running efficiency of kiln.
To solve the above-mentioned problems, the formula that the present invention is indicated with mass percentage are as follows: the sub-white corundum 10%- of 3-1mm
30%, the aluminium chromium synthesis of aluminum-spinel 5%-15%, 1-0.088mm of aluminum-spinel 10%-35%, 1-0.088mm of 2-1mm
Expect the aluminium chromium synthesis material 25%-40% of 10%-25%, < 0.088mm；In addition, the knot for accounting for above-mentioned all total mass of raw materiales 2~7% is added
Mixture.
The aluminium chromium synthesis material, which can be, to be commonly called as being also possible to for the refractory raw material of aluminium chromium slag by Al2O3And Cr2O3Synthesis
Raw material, Al2O3Mass percentage be 65~80%, Cr2O3Mass percentage be 7~15%, remaining contains for impurity
Amount.
The aluminum-spinel is its Al of the magnesium aluminate spinel of oxygen enrichment aluminium2O3Mass percentage be 75 ~ 85%, MgO
Mass percentage be 10 ~ 20%, remaining is impurity content.
The sub-white corundum is the refractory raw material of the same name of alumina content >=96%.
The bonding agent is any one of aluminium dihydrogen phosphate and spent pulping liquor or two kinds, and the bonding agent specific gravity is 1.0
~1.6g/cm3。
The preparation method of the refractory brick, which is characterized in that the preparation method comprises the following steps:
A, various raw materials are weighed first, in accordance with the proportion scale of refractory brick described in claim 1, first by the weighed Asia 3-1mm Bai Gang
Jade, 2-1mm aluminum-spinel, 1-0.088mm aluminum-spinel and one-size aluminium chromium synthesis material and edge runner-wet mill be added mixed
Then material is added bonding agent mixed grind 5-15min, is eventually adding the aluminium chromium synthesis material of < 0.088mm, obtains mixture after mixing
Material；
B, the mixed material for obtaining step a is formed using brick machine row pressing blank, the bulk density of gained adobe after compacting
For 2.9 ~ 3.3g/cm3；
C, the adobe for obtaining step b dry 8 at 80~160 DEG C~for 24 hours；Then it is burnt into, is burnt using hyperthermia tunnel Kiln
It is 1540~1650 DEG C at temperature, 3~12h is kept the temperature under this firing temperature, cooling kiln discharge, obtains product after heat preservation.
The preparation method of refractory brick according to claim 6, it is characterised in that: mainization in products obtained therefrom refractory brick
It studies and is divided into Al2O360~80% and Cr2O35~9%.
Use aluminium chromium synthesis material for primary raw material in technical solution of the present invention, aluminium chromium synthesis material compact structure, the porosity is low,
Its main object phase aluminium chromium solid solution is evenly distributed, and grain development is preferable, compact structure, after high temperature sintering, effectively improves grid
The consistency and intensity of body brick, make it have good high-temperature behavior.
The present invention, instead of the aluminium chromium synthesis material of one-size, reduces the dosage of aluminium chromium synthesis material with 3-1mm sub-white corundum
With the content of products made thereby chromium oxide.
The present invention, instead of the aluminium chromium synthesis material of one-size, reduces the use of aluminium chromium synthesis material with 2-1mm magnesium aluminate spinel
The content of amount and products made thereby chromium oxide.
The present invention, instead of the aluminium chromium synthesis material of one-size, reduces the conjunction of aluminium chromium with 1-0.088mm magnesium aluminate spinel part
At the dosage of material and the content of products made thereby chromium oxide.
Use aluminium dihydrogen phosphate and spent pulping liquor for bonding agent in technical solution of the present invention, aluminium dihydrogen phosphate can equably glue
The surface of the various particles of brick body is invested, forms the AlPO of film-form during the sintering process4In conjunction with phase, the AlPO after high-temperature calcination4Promote
Into (CrAl)2O3Solid solution is combined and is formed, and is promoted to realize closely knit combination between particle and matrix, is obtained made refractory material
It is very high-intensitive, and P2O5Big portion's volatilization influences material at high temperature performance little.
With the aluminum-spinel of rich aluminium rather than magnesium aluminate spinel makees raw material, avoids magnesia to phosphate bonding agent
Promote to coagulate, ensure that normal production.
After aluminum-spinel is added, because complex phase modifying function is conducive to improve the thermal shock resistance of material.
It uses aluminium dihydrogen phosphate to replace phosphoric acid as bonding agent, is diluted when necessary as spent pulping liquor can be added in summer, further
Slow down the blood coagulation enhancing effect of magnesia.
In use, furnace charge or adhesion of slag brick face and after penetrating into brick inner air vent, the chromium oxide in matrix is melted to enter and be seeped
Enter object and improve its viscosity, corrodes and extend refractory life to have the function that alleviate.
In use, 2-1mm aluminum-spinel, 1-0.088mm aluminum-spinel can more effectively support alkalinity compared with sub-white corundum
The erosion of material such as Na2The erosion of O steam, to play a part of to extend refractory life.
In use, since brick internal oxidition chromium can be melted in time into the liquid phase for penetrating into brick body, it is gentle to improve its viscosity
Solution corrodes；Since added aluminum-spinel can more preferably resist alkaline or alkalescent kiln material erosion, this product tool compared with corundum in granules
There is good corrosion resistance.
Since products of the present invention has stable preparation process, product qualification rate is high, excellent corrosion resistance and heat
The characteristics of shaking excellent in stability, the running efficiency of kiln can be effectively ensured applied to regenerator chamber of glass kiln and coloured rotary kiln,
The service life of kiln is improved, good result is obtained.
Specific embodiment
Embodiment 1
Composition of raw materials is expressed as with mass percentage, aluminum-spinel 15%, the 1- of the sub-white corundum 26% of 3-1mm, 2-1mm
The aluminum-spinel 10% of 0.088mm, the aluminium chromium synthesis material 17% of 1-0.088mm, < 0.088mm aluminium chromium synthesis material 32%；In addition
The biphosphate Al binding agent for accounting for above-mentioned all raw material gross weights 4%, specific gravity 1.34g/cm is added3；Lv Ge magnesia fire-protecting wall
Preparation process include: a, according to above-mentioned formula, weigh the sub-white corundum, 2-1mm aluminum-spinel, 1-0.088mm aluminium of 3-1mm
Simultaneously edge runner-wet mill progress mixing is added in magnesia spinel and 1-0.088mm aluminium chromium synthesis material, bonding agent mixed grind 12min is then added, most
The aluminium chromium synthesis material of < 0.088mm is added afterwards, obtains mixed material after mixing；B, the mixed material for obtaining step a uses liquid
Pressure brick machine carries out being pressed into glass furnace standard tubular brick；C, the adobe for obtaining step b dry 10h at 120 DEG C；Then
It being burnt into using hyperthermia tunnel Kiln, firing temperature is 1580 DEG C, 6h is kept the temperature under this firing temperature, cooling kiln discharge after heat preservation,
Regenerator chamber of glass kiln aluminium chromium checker brick is successfully made after examining；The performance of products obtained therefrom: bulk density 3.2g/cm3, it is aobvious
The porosity 14.9%, cold crushing strength 72.3MPa, 1100 DEG C of thermal shock resistance water cooling 5 times, refractoriness under load T0.6%1700
℃、Cr2O3Content 7.35%.
Embodiment 2
Indicate that formula is with mass percentage, aluminum-spinel 25%, the 1- of the sub-white corundum 15% of 3-1mm, 2-1mm
The aluminum-spinel 8% of 0.088mm, the aluminium chromium synthesis material 16% of 1-0.088mm, < 0.088mm aluminium chromium synthesis material 36%；In addition
The spent pulping liquor that the aluminium dihydrogen phosphate and 2% that account for above-mentioned all raw material gross weights 2% is added is bonding agent, specific gravity 1.30g/
cm3The preparation process of Lv Ge magnesia fire-protecting wall includes:
A, sub-white corundum, 2-1mm aluminum-spinel, 1-0.088mm aluminum-spinel and the 1-0.088mm aluminium chromium of 3-1mm are weighed
Simultaneously edge runner-wet mill progress mixing is added in synthesis material, bonding agent mixed grind 10min is then added, the aluminium chromium for being eventually adding < 0.088mm closes
At material, mixed material is obtained after mixing；B, the mixed material that step a is obtained is pressed into standard cartridge type using hydraulic press
Brick；C, the adobe for obtaining step b dry 8h at 150 DEG C；Then it is burnt into using hyperthermia tunnel Kiln, firing temperature is
1600 DEG C, 3h is kept the temperature under this firing temperature, cooling kiln discharge after heat preservation, through examining system to arrive product；The performance of products obtained therefrom: volume
Density 3.26g/cm3, apparent porosity 14.5%, cold crushing strength 76.2MPa, 1100 DEG C of thermal shock resistance water cooling 5 times, loading
Softening temperature T0.6%/℃1700、Cr2O3Content 7.8%.
Embodiment 3
Nonferrous industry aluminium chromium magnesia fireproof body brick is produced, take the formula that mass percentage indicates as the sub- Bai Gang of granularity 3-1mm
Beautiful 10%, the aluminum-spinel 30% of 2-1mm, the aluminum-spinel 6% of 1-0.088mm, 1-0.088mm aluminium chromium synthesis material 20%, <
0.088mm aluminium chromium synthesis material 34%；Additionally incorporate the spent pulping liquor of the aluminium dihydrogen phosphate and 2% that account for above-mentioned all raw material gross weights 3%
For bonding agent, specific gravity 1.26g/cm3；The preparation process of Lv Ge magnesia fire-protecting wall includes: a, first, in accordance with above-mentioned charge ratio
Example weighs various raw materials, will first weigh the sub-white corundum of 3-1mm, the aluminum-spinel of 2-1mm and 1-0.088mm, 1-0.088mm
Aluminium chromium synthesis material is added edge runner-wet mill and carries out mixing, and bonding agent mixed grind 10min is then added, is eventually adding the aluminium chromium of < 0.088mm
Synthesis material obtains mixed material after mixing；B, the mixed material that step a is obtained is carried out being pressed into glass using hydraulic press
Kiln standard tubular brick；C, the adobe for obtaining step b dry 12h at 110 DEG C；Then it is burnt using hyperthermia tunnel Kiln
At firing temperature is 1550 DEG C, and 8h is kept the temperature under this firing temperature, and cooling kiln discharge, is successfully made glass after examining after heat preservation
Kiln regenerative chamber aluminium chromium checker brick；The performance of products obtained therefrom is bulk density 3.32g/cm3, apparent porosity 13.9%, room temperature
Compressive resistance 84.9MPa, 1100 DEG C of thermal shock resistance water cooling 4 times, refractoriness under load T0.6%/℃1700、Cr2O3Content 8.1%.
Embodiment 4
Composition of raw materials is expressed as with mass percentage, aluminum-spinel 20%, the 1- of the sub-white corundum 23% of 3-1mm, 2-1mm
The aluminum-spinel 14% of 0.088mm, the aluminium chromium synthesis material 15% of 1-0.088mm, < 0.088mm aluminium chromium synthesis material 28%；In addition
The spent pulping liquor that the biphosphate Al binding agent and 2% that account for above-mentioned all raw material gross weights 4% is added is bonding agent, and specific gravity is
1.40g/cm3；The preparation process of Lv Ge magnesia fire-protecting wall includes: a, according to above-mentioned formula, weighs sub-white corundum, the 2- of 3-1mm
Simultaneously edge runner-wet mill progress mixing is added in 1mm aluminum-spinel, 1-0.088mm aluminum-spinel and 1-0.088mm aluminium chromium synthesis material, so
Bonding agent mixed grind 8min is added afterwards, is eventually adding the aluminium chromium synthesis material of < 0.088mm, obtains mixed material after mixing；It b, will step
The mixed material that rapid a is obtained carries out being pressed into glass furnace standard tubular brick using hydraulic press；C, the brick for obtaining step b
Base dry 20h at 100 DEG C；Then it is burnt into using hyperthermia tunnel Kiln, firing temperature is 1620 DEG C, under this firing temperature
5h is kept the temperature, cooling kiln discharge, is successfully made regenerator chamber of glass kiln aluminium chromium checker brick after examining after heat preservation；The property of products obtained therefrom
Can: bulk density 3.18g/cm3, apparent porosity 15.1%, 1100 DEG C of cold crushing strength 69.8MPa, thermal shock resistance water coolings 6
Secondary, refractoriness under load T0.6%1700℃、Cr2O3Content 6.45%.
Embodiment 5
Composition of raw materials is expressed as with mass percentage, aluminum-spinel 19%, the 1- of the sub-white corundum 29% of 3-1mm, 2-1mm
The aluminum-spinel 13% of 0.088mm, the aluminium chromium synthesis material 14% of 1-0.088mm, < 0.088mm aluminium chromium synthesis material 25%；In addition
The biphosphate Al binding agent for accounting for above-mentioned all raw material gross weights 5%, specific gravity 1.20g/cm is added3；Lv Ge magnesia fire-protecting wall
Preparation process include: a, according to above-mentioned formula, weigh the sub-white corundum, 2-1mm aluminum-spinel, 1-0.088mm aluminium of 3-1mm
Simultaneously edge runner-wet mill progress mixing is added in magnesia spinel and 1-0.088mm aluminium chromium synthesis material, bonding agent mixed grind 15min is then added, most
The aluminium chromium synthesis material of < 0.088mm is added afterwards, obtains mixed material after mixing；B, the mixed material for obtaining step a uses liquid
Pressure brick machine carries out being pressed into glass furnace standard tubular brick；C, the adobe for obtaining step b is dried for 24 hours at 130 DEG C；Then
It being burnt into using hyperthermia tunnel Kiln, firing temperature is 1540 DEG C, 12h is kept the temperature under this firing temperature, cooling kiln discharge after heat preservation,
Regenerator chamber of glass kiln aluminium chromium checker brick is successfully made after examining；The performance of products obtained therefrom: bulk density 3.17g/cm3、
Apparent porosity 15.4%, cold crushing strength 68.7MPa, 1100 DEG C of thermal shock resistance water cooling 6 times, refractoriness under load T0.6%
1700℃、Cr2O3Content 5.85%.
The physical and chemical index of products obtained therefrom reaches requirement, ensure that when reducing material oxidation chromium content about 50% made
Refractory material physicochemical property.
Claims (7)
1. a kind of Lv Ge magnesia fire-protecting wall, it is characterised in that: take the formula that mass percentage indicates as the sub- Bai Gang of 3-1mm
The aluminium of aluminum-spinel 5%-15%, 1-0.088mm of aluminum-spinel 10%-35%, 1-0.088mm of beautiful 10%-30%, 2-1mm
The aluminium chromium synthesis material 25%-40% of chromium synthesis material 10%-25%, < 0.088mm；In addition, be added account for above-mentioned all total mass of raw materiales 2~
7% bonding agent.
2. refractory brick according to claim 1, it is characterised in that: the Al of the aluminium chromium synthesis material2O3Mass percentage
For 65~80%, Cr2O3Mass percentage be 7~15%, remaining is impurity content.
3. refractory brick according to claim 1, it is characterised in that: the aluminum-spinel is that the magnalium point of oxygen enrichment aluminium is brilliant
Its Al of stone2O3Mass percentage be 75 ~ 85%, MgO mass percentage be 10 ~ 20%, remaining is impurity content.
4. refractory brick according to claim 1, it is characterised in that: the sub-white corundum is the same of alumina content >=96%
Name refractory raw material.
5. refractory brick according to claim 1, it is characterised in that: the bonding agent is in aluminium dihydrogen phosphate and spent pulping liquor
It is any one or two kinds of, the bonding agent specific gravity be 1.0~1.6g/cm3。
6. a kind of preparation method of refractory brick described in claim 1, which is characterized in that the preparation method comprises the following steps:
A, various raw materials are weighed first, in accordance with the proportion scale of refractory brick described in claim 1, first by the weighed Asia 3-1mm Bai Gang
Jade, 2-1mm aluminum-spinel, 1-0.088mm aluminum-spinel and one-size aluminium chromium synthesis material and edge runner-wet mill be added mixed
Then material is added bonding agent mixed grind 5-15min, is eventually adding the aluminium chromium synthesis material of < 0.088mm, obtains mixture after mixing
Material；
B, the mixed material for obtaining step a is formed using brick machine row pressing blank, the bulk density of gained adobe after compacting
For 2.9 ~ 3.3g/cm3；
C, the adobe for obtaining step b dry 8 at 80~160 DEG C~for 24 hours；Then it is burnt into, is burnt using hyperthermia tunnel Kiln
It is 1540~1650 DEG C at temperature, 3~12h is kept the temperature under this firing temperature, cooling kiln discharge, obtains product after heat preservation.
7. the preparation method of refractory brick according to claim 6, it is characterised in that: the primary chemical in products obtained therefrom refractory brick
Ingredient is Al2O360~80% and Cr2O35~9%.
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| CN111995379A (en) * | 2020-07-29 | 2020-11-27 | 北京金隅通达耐火技术有限公司 | Zirconium-containing corundum spinel brick for hazardous waste disposal equipment and preparation method thereof |
| CN112110736A (en) * | 2020-07-29 | 2020-12-22 | 北京金隅通达耐火技术有限公司 | Corundum spinel brick for hazardous waste disposal equipment and preparation method thereof |
| CN112521167A (en) * | 2020-12-08 | 2021-03-19 | 洛阳科创新材料股份有限公司 | Chrome corundum spinel tapping hole head brick for eccentric electric furnace and preparation method thereof |
| CN113651621A (en) * | 2021-08-30 | 2021-11-16 | 郑州瑞泰耐火科技有限公司 | Special novel silicon mullite brick for cement rotary kiln and preparation process thereof |
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| CN111995379A (en) * | 2020-07-29 | 2020-11-27 | 北京金隅通达耐火技术有限公司 | Zirconium-containing corundum spinel brick for hazardous waste disposal equipment and preparation method thereof |
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| CN112521167A (en) * | 2020-12-08 | 2021-03-19 | 洛阳科创新材料股份有限公司 | Chrome corundum spinel tapping hole head brick for eccentric electric furnace and preparation method thereof |
| CN113651621A (en) * | 2021-08-30 | 2021-11-16 | 郑州瑞泰耐火科技有限公司 | Special novel silicon mullite brick for cement rotary kiln and preparation process thereof |
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