CN105585314B - A kind of densification calcium hexaluminate grog refractory and preparation method thereof - Google Patents

A kind of densification calcium hexaluminate grog refractory and preparation method thereof Download PDF

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CN105585314B
CN105585314B CN201510966057.1A CN201510966057A CN105585314B CN 105585314 B CN105585314 B CN 105585314B CN 201510966057 A CN201510966057 A CN 201510966057A CN 105585314 B CN105585314 B CN 105585314B
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calcium hexaluminate
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grog refractory
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CN105585314A (en
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不公告发明人
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Liaoning Institute of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • 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
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • 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
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/604—Pressing at temperatures other than sintering temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A kind of densification calcium hexaluminate grog refractory and preparation method thereof, ingredient contains Al by weight percentage2O3 87.04 ~ 88.87%, CaO 7.96 ~ 8.13%, MnO 3.00 ~ 5.00%；Relative density is 90.90 ~ 94.80%, and apparent porosity is 2.80 ~ 4.40%；Preparation method is：（1）By the levigate rear mixing of bauxite and lime stone difference；（2）Mixed material is pressed into green-ball, calcining for the first time is then carried out and clinker is made；（3）By the levigate rear addition manganese monoxide micro mist of clinker, re-compacted balling-up；（4）Second is carried out to calcine.The present invention is using manganese monoxide micro mist as rush agglutinant, it is dissolved into calcium hexaluminate phase in calcination process manganese monoxide and forms solid solution, so as to improve the sintering activity of calcium hexaluminate phase, promote growing up for calcium hexaluminate phase, so as to obtain fine and close calcium hexaluminate grog refractory under the conditions of relatively low secondary clacining temperature and shorter soaking time, energy consumption is effectively reduced, improves production efficiency, promotes energy-saving and emission-reduction.

Description

A kind of densification calcium hexaluminate grog refractory and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of densification calcium hexaluminate grog refractory and its preparation side Method.
Background technology
Calcium hexaluminate（CA6）Fusing point is high（1870℃）, fire resistance is good, and the solubility in iron content slag is low, is restoring Stability in atmosphere (CO) is high, and the chemical stability in alkaline environment is good, (steel and has coloured gold to molten metal and slag Belong to) wetability it is low, therefore be extraordinary high temperature resistance, anti-erosion, anti-metal liquid and slag penetrate into, and have high temperature insulating heat preservation Performance materials, and metallurgical furnace lining can be directly used in and novel refractory that the metallurgical hot face of cylinder-packing is contacted with molten metal and fused salt. Meanwhile calcium hexaluminate has good chemical compatibility and similar thermal expansivity with aluminium oxide, it can be with aluminium oxide with any ratio Example is used cooperatively, these characteristics cause calcium hexaluminate to have ten in the high temperature industry such as metallurgy, glass, cement, ceramics, petrochemical industry Divide and be widely applied prospect.
During synthesis in solid state prepares fine and close calcium hexaluminate grog refractory, by reacting adjoint between each constituent element Volumetric expansion inhibits sintering and densification process, it is difficult to obtain fine and close grog refractory by once calcining；Meanwhile by It is low in the sintering activity of calcium hexaluminate phase, even if by calcining twice, it is also difficult to obtain fine and close clinker, therefore general requirement firing Temperature is not less than 1700 DEG C；Further, since in reaction process between calcium hexaluminate crystalline phase easy dendrite put up a bridge interconnection formed it is mesh structural porous Structure further affects the sintering densification of calcium hexaluminate refractory material.
Invention content
For the above problem present on current calcium hexaluminate grog refractory technology of preparing, the present invention provides a kind of densifications Calcium hexaluminate grog refractory and preparation method thereof is laggard by adding in manganese monoxide micro-powder as additive during rerolling Row calcining in being dissolved into calcium hexaluminate quite in calcination process manganese monoxide, forms solid solution so as to improve calcium hexaluminate The sintering activity of phase promotes growing up for calcium hexaluminate phase, can be real under the conditions of relatively low calcination temperature and shorter soaking time The good sintering of existing calcium hexaluminate grog refractory obtains fine and close calcium hexaluminate grog refractory, improves production efficiency, promotes energy saving subtract Row.
The fine and close calcium hexaluminate grog refractory of the present invention, ingredient contain Al by weight percentage2O3 87.04 ~ 88.87%, CaO 7.96 ~ 8.13%, MnO 3.00 ~ 5.00%；Relative density is 90.90 ~ 94.80%, and apparent porosity is 2.80 ~ 4.40%.
The preparation method of the fine and close calcium hexaluminate grog refractory of the present invention, carries out according to the following steps：
（1）Bauxite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, after being mixed in sand mixer, system Resulting mixture material；Wherein bauxite accounts for the 86.38% ~ 88.90% of mixed material total weight, and lime stone accounts for mixed material total weight 11.10%~13.62%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 100 ~ 150MPa, by green-ball 1200 ~ 1 ~ 2 hour is kept the temperature under the conditions of 1250 DEG C, first time calcining is carried out, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, it adds in manganese monoxide micro mist and is simultaneously carried out in sand mixer Mixing, wherein manganese monoxide micro mist accounts for the 3.00 ~ 5.00% of clinker total weight；After mixing by ball press 100 ~ Ball is pressed under the pressure of 150MPa, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 2 ~ 3 hours under the conditions of 1600 ~ 1650 DEG C, second is carried out and calcines, obtain densification six Calcium aluminate grog refractory.
Al in above-mentioned bauxite2O3Weight content >=74.20%, weight content >=50.20% of CaO in lime stone.
Above-mentioned manganese monoxide micro mist purity >=98.00%, granularity≤10 μm.
Compared with prior art, the features of the present invention and advantageous effect are：
The fine and close calcium hexaluminate grog refractory of the present invention is used as using manganese monoxide micro mist promotees agglutinant, in calcination process one Manganese oxide is dissolved into calcium hexaluminate phase, makes calcium hexaluminate that distortion of lattice mutually occur, and activity improves, and promotes its sintering and densification Behavior, it is ripe so as to obtain fine and close calcium hexaluminate fire resisting under the conditions of relatively low secondary clacining temperature and shorter soaking time Material, effectively increases production efficiency, reduces energy consumption and production cost.
Specific embodiment
The equipment that mixed material uses in the embodiment of the present invention is S1110 type sand mixer.
The equipment that compacting balling-up uses in the embodiment of the present invention is GY650-180 type ball press.
The equipment used is calcined in the embodiment of the present invention as high temperature vertical kiln.
Bauxite, magnesite, lime stone and the manganese monoxide micro mist used in the embodiment of the present invention is commercial product.
Embodiment 1
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 74.20%, using CaO in lime stone Weight percentage 54.50%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O3 88.87%, CaO 8.13%, MnO 3.00%；Relative density is 90.90%, apparent porosity 4.40%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 88.90% of mixed material total weight, and lime stone accounts for mixed material total weight 11.10%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 150MPa, by green-ball in 1250 DEG C of conditions Lower heat preservation 2 hours, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 3.00% manganese monoxide it is micro- Powder after carrying out secondary mixing in sand mixer, is pressed into ball by ball press under the pressure of 150MPa, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 3 hours under the conditions of 1650 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory；
In the case where not adding manganese monoxide micro mist, contrast experiment is carried out in a manner described, obtains the burning of contrast experiment Tie clinker；The sintered clinker of the fine and close calcium hexaluminate grog refractory of acquisition and contrast experiment is subjected to sem analysis respectively, as a result table It is bright, it is additive-free under the conditions of sintered specimen interior tissue it is loose, stomata is more, in contrast, due to the addition of additive MnO, The stomata of sample substantially reduces, and microstructure is significantly fine and close, can be clearly observable its principal crystalline phase CA6Presence, from microstructure On further illustrate additive MnO and play the role of being effectively promoted to the sintering of calcium hexaluminate refractory material；By acquisition Fine and close calcium hexaluminate grog refractory carries out EDS analyses, the results showed that, the MnO of addition is primarily present in calcium hexaluminate inside system In crystalline phase, solid solution is formd, can promote calcium hexaluminate crystalline phase that distortion of lattice occurs, activity improves, and illustrating the addition of MnO has Effect promotes sintering and the densification behavior of calcium hexaluminate.
Embodiment 2
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 75.60%, using CaO in lime stone Weight percentage 54.00%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O388.60%, CaO 8.10%, MnO 3.30%；Relative density is 91.70%, apparent porosity 4.20%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 88.62% of mixed material total weight, and lime stone accounts for mixed material total weight 11.38%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 140MPa, by green-ball in 1250 DEG C of conditions Lower heat preservation 2 hours, carries out first time calcining, a clinker is made；
（3）It is by a chamotte crushing and again levigate to the mesh of granularity≤88, add in the oxidation for accounting for clinker total weight 3.30% Manganese micro mist, is mixed in sand mixer, and ball is pressed under the pressure of 150MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 2 hours under the conditions of 1650 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 3
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 77.80%, using CaO in lime stone Weight percentage 53.80%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O388.41%, CaO 8.09%, MnO 3.50%；Relative density is 92.40%, apparent porosity 3.90%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 88.29% of mixed material total weight, and lime stone accounts for mixed material total weight 11.71%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 120MPa, by green-ball in 1200 DEG C of conditions Lower heat preservation 2 hours, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 3.50% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 140MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 3 hours under the conditions of 1650 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 4
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 79.70%, using CaO in lime stone Weight percentage 53.20%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O3 88.14%, CaO 8.06%, MnO 3.80%；Relative density is 93.30%, apparent porosity 3.60%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 87.92% of mixed material total weight, and lime stone accounts for mixed material total weight 12.08%；
（2）Mixed material is pressed into green-ball using ball press under the pressure of 100MPa by ball press, green-ball is existed 1 hour is kept the temperature under the conditions of 1200 DEG C, first time calcining is carried out, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 3.80% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 100MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 3 hours under the conditions of 1650 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 5
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 80.50%, using CaO in lime stone Weight percentage 52.60%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O3 87.96%, CaO 8.04%, MnO 4.00%；Relative density is 93.70%, apparent porosity 3.40%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 87.57% of mixed material total weight, and lime stone accounts for mixed material total weight 12.43%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 130MPa, by green-ball in 1250 DEG C of conditions Lower heat preservation 2 hours, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 4.00% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 150MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 3 hours under the conditions of 1600 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 6
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 82.10%, using CaO in lime stone Weight percentage 51.90%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O387.59%, CaO 8.01%, MnO 4.40%；Relative density is 94.10%, apparent porosity 3.10%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 87.33% of mixed material total weight, and lime stone accounts for mixed material total weight 12.67%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 120MPa, by green-ball in 1250 DEG C of conditions Lower heat preservation 2 hours, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 4.40% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 130MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 2 hours under the conditions of 1600 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 7
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 84.70%, using CaO in lime stone Weight percentage 51.10%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O387.31%, CaO 7.99%, MnO 4.70%；Relative density is 94.50%, apparent porosity 3.00%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 86.81% of mixed material total weight, and lime stone accounts for mixed material total weight 13.19%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 110MPa, by green-ball in 1200 DEG C of conditions Lower heat preservation 1 hour, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of grain≤88, add in account for clinker total weight 4.70% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 120MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 2 hours under the conditions of 1600 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.
Embodiment 8
Al in the bauxite raw material used in the present embodiment2O3Weight percentage 86.30%, using CaO in lime stone Weight percentage 50.20%.
The fine and close calcium hexaluminate grog refractory ingredient of preparation contains Al by weight percentage2O387.04%, CaO 7.96%, MnO 5.00%；Relative density is 94.80%, apparent porosity 2.80%；Preparation method carries out according to the following steps：
（1）Bauxite, magnesite and lime stone are crushed respectively and levigate to the mesh of granularity≤88, mixed in sand mixer After conjunction, mixed material is made, wherein bauxite accounts for the 86.38% of mixed material total weight, and lime stone accounts for mixed material total weight 13.62%；
（2）Mixed material is pressed into green-ball by ball press under the pressure of 100MPa, by green-ball in 1200 DEG C of conditions Lower heat preservation 1 hour, carries out first time calcining, clinker is made；
（3）It is by chamotte crushing and again levigate to the mesh of granularity≤88, add in account for clinker total weight 5.00% manganese monoxide it is micro- Powder is mixed in sand mixer, and ball is pressed under the pressure of 110MPa by ball press, obtains secondary ball material；
（4）Secondary ball material is kept the temperature 2 hours under the conditions of 1600 DEG C, second is carried out and calcines, obtains fine and close calcium hexaluminate Grog refractory.

Claims (3)

1. a kind of densification calcium hexaluminate grog refractory, it is characterised in that ingredient contains Al by weight percentage2O387.04~ 88.87%, CaO 7.96~8.13%, MnO 3.00~5.00%；Relative density is 90.90~94.80%, and apparent porosity is 2.80~4.40%, preparation method follows the steps below：
(1) bauxite and lime stone crushed respectively and levigate to the mesh of granularity≤88, after being mixed in sand mixer, be made mixed Close material；Wherein bauxite accounts for the 86.38%~88.90% of mixed material total weight, and lime stone accounts for mixed material total weight 11.10%~13.62%；
(2) mixed material is pressed into green-ball by ball press under the pressure of 100~150MPa, by green-ball 1200~1250 1~2 hour is kept the temperature under the conditions of DEG C, first time calcining is carried out, clinker is made；
(3) it is by chamotte crushing and again levigate to the mesh of granularity≤88, it adds in manganese monoxide micro mist and is simultaneously mixed in sand mixer, Wherein manganese monoxide micro mist accounts for the 3.00~5.00% of clinker total weight；After mixing by ball press in 100~150MPa Pressure under be pressed into ball, obtain secondary ball material；
(4) secondary ball material is kept the temperature 2~3 hours under the conditions of 1600~1650 DEG C, carries out second and calcine, obtain fine and close six aluminium Sour calcium grog refractory.
2. densification calcium hexaluminate grog refractory according to claim 1, manganese monoxide micro mist purity >=98.00%, granularity ≤10μm。
3. densification calcium hexaluminate grog refractory according to claim 1, Al in bauxite2O3Weight content >= 74.20%, weight content >=50.20% of CaO in lime stone.
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CN111377727B (en) * 2020-03-13 2022-05-27 宜兴摩根热陶瓷有限公司 Titanium-containing calcium hexaluminate material and preparation method thereof
GB2601211B (en) * 2020-03-13 2024-01-31 Univ Wuhan Science & Tech Refractory material for smelting titanium-aluminium alloy and method of preparing same
CN111196737A (en) * 2020-03-24 2020-05-26 辽宁科技学院 Technological method for preparing compact calcium dialuminate refractory clinker by one-step method
CN115321966A (en) 2021-05-10 2022-11-11 淄博市鲁中耐火材料有限公司 Corrosion-damage-resistant refractory material, preparation method and application thereof
CN115321961A (en) 2021-05-10 2022-11-11 淄博市鲁中耐火材料有限公司 High-purity compact calcium hexaluminate refractory material and preparation method thereof
CN115321994A (en) 2021-05-10 2022-11-11 淄博郎丰高温材料有限公司 CA 6-based medium-volume-density refractory material, preparation method and application thereof
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