CN109320280A - A kind of coverter pig gas permeable material and preparation method thereof - Google Patents
A kind of coverter pig gas permeable material and preparation method thereof Download PDFInfo
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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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0038—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter
- C04B38/0041—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter the particulate matter having preselected particle sizes
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- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
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Abstract
The present invention relates to a kind of coverter pig gas permeable materials and preparation method thereof.Its technical solution is: by magnesia powder, magnesium aluminate spinel fine powder, α-Al2O3Micro mist, aluminium hydroxide, aluminum fluoride, anhydrous magnesium sulfate, additive, foaming agent, foam stabilizer, water-reducing agent and aluminous cement mixing, external adding water, stirring, molding solidifies, dry, 1400~1600 DEG C of heat treatments, broken, screening obtains particulate material A of the granularity less than 0.25mm and granularity as the particulate material B of 0.25~1mm.Thermosetting phenolic resin, surfactant, simple substance silica flour, copper powder and ammonium metavanadate are mixed again, obtain modified resin.Then magnesia particle, particulate material A, particulate material B, crystalline flake graphite and modified resin are mixed, isostatic pressing is heat-treated under the conditions of 100~300 DEG C, obtains coverter pig gas permeable material.Production cost of the present invention is low, and prepared coverter pig gas permeable material high temperature break resistant intensity is big, gas permeability is stable, scour resistance is excellent and long service life.
Description
Technical field
The invention belongs to gas permeable material technical fields.More particularly to a kind of coverter pig gas permeable material and preparation method thereof.
Background technique
Air brick is the critical function element that furnace outer refining process can smoothly be implemented, reliability to external refining and complete
Standby property plays a crucial role.With the raising of converter capacity being gradually increased with the service life, to converter air brick it is also proposed that
Higher requirement.Converter bottom blowing air brick still suffers from due to temperature change in addition to being washed away the erosion with clinker by molten steel
The stress of generation, therefore it is required that air brick meets intensity, corrosion resistance, thermal shock resistance etc. performance requirement.
In actual use, gas permeable material is primarily present that permeability is unstable, erosion-resisting characteristics is poor, elevated temperature strength
The problems such as low.The presence of the above problem affects the normal rhythm of steel smelting procedure, reduces working efficiency.
In the technology of preparing of existing gas permeable material, by introducing additive to promote material sintering, improve bond strength, but
The low melting point liquid phase of formation reduces the mechanical strength of gas permeable material；It introduces micro mist and is resisted with enhancing institutional framework densification, improving
Aggressivity, but will affect the gas permeability of product, and micro mist is unevenly distributed the stability that can reduce product structure and performance instead.
Summary of the invention
The present invention is directed to overcome defect of the existing technology, it is therefore an objective to it is ventilative to provide a kind of coverter pig that production cost is low
The preparation method of material, with the coverter pig gas permeable material high temperature break resistant intensity of this method preparation is big, gas permeability is stable, scour resistance
It can excellent, long service life.
To achieve the above object, the technical solution adopted by the present invention comprises the concrete steps that:
The first step, by the magnesia powder of 40~60wt%, the magnesium aluminate spinel fine powder of 1~10wt%, 1~10wt% α-
Al2O3Micro mist, the aluminium hydroxide of 1~10wt%, the aluminum fluoride of 1~10wt%, the anhydrous magnesium sulfate of 1~10wt%, 1~5wt%
Additive, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, the water-reducing agent of 0.1~1wt% and the aluminic acid of 1~5wt%
Calcium cement mixing obtains mixture, then the water of the additional 10~20wt% of mixture, stirs evenly, moulding by casting, solidification 10
~20 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 12~24 hours under the conditions of 90~120 DEG C, then at 1400~
It is heat-treated 5~7 hours under the conditions of 1600 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, by the thermosetting phenolic resin of 60~80wt%, the surfactant of 1~10wt%, 10~20wt%
Simple substance silica flour, 1~5wt% copper powder and 1~10wt% ammonium metavanadate mixing, stir evenly, obtain modified resin.
4th step, by the magnesia particle of 50~70wt%, 1~10wt% the particulate material A, 10~20wt% described in
The modified resin of particulate material B, the crystalline flake graphite of 10~30wt% and 1~10wt% mixes, and stirs evenly, wait static pressure at
Type is heat-treated 10~20 hours under the conditions of 100~300 DEG C, obtains coverter pig gas permeable material.
The content of MgO of the magnesia powder is greater than 97wt%；The granularity of the magnesia powder is less than 0.088mm.
The content of MgO of the magnesia particle is greater than 97wt%；The granularity of the magnesia particle is 1~3mm.
The magnesium aluminate spinel: Al2O3Content is 60~80wt%；SiO2Content is less than 0.4wt%；Granularity is less than
0.088mm。
α-the Al2O3The Al of micro mist2O3Content is greater than 99wt%；α-the Al2O3The granularity of micro mist is less than 0.01mm.
The Al (OH) of the aluminium hydroxide3Content is greater than 99wt%；The granularity of the aluminium hydroxide is less than 0.045mm.
The additive is zinc oxide or is titanium dioxide, and the purity of the additive is greater than 99wt%；The additive
Granularity be less than 0.088mm.
The Si content of the simple substance silica flour is greater than 99wt%；The granularity of the simple substance silica flour is less than 0.088mm.
The Cu content of the copper powder is greater than 99wt%；The granularity of the copper powder is less than 0.088mm.
The C content of the crystalline flake graphite is greater than 97wt%；The granularity of the crystalline flake graphite is less than 0.088mm.
The pressure of the isostatic pressing is 120~150MPa, and the dwell time is 4~10 minutes.
The AlF of the aluminum fluoride3Content is greater than 99wt%.
The purity of the anhydrous magnesium sulfate is greater than 99wt%.
The foaming agent is neopelex or is lauryl sodium sulfate, and the purity of the foaming agent is greater than
98wt%.
The foam stabilizer is sodium sulfate of polyethenoxy ether of fatty alcohol or is sodium carboxymethylcellulose.
The water-reducing agent is calgon or is sodium tripolyphosphate, and the purity of the water-reducing agent is greater than 98wt%.
The aluminous cement: Al2O3Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content
Less than 0.3wt%.
The viscosity at ambient temperature of the thermosetting phenolic resin is less than 15wt% less than 10000 centipoises, moisture content.
The surfactant is fatty acid methyl ester or is propylene oxide.
The purity of the ammonium metavanadate is greater than 99wt%.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
(1) present invention utilizes additive, magnesia, aluminium hydroxide, α-Al2O3The raw materials such as micro mist, foaming agent are in different temperatures item
Reaction characteristics under part, the prefabricated aplitic texture particulate material based on periclase and magnesium aluminate spinel have multistage through-hole knot
Structure and high-intensitive feature.In conjunction with the effect of modified resin, it is ensured that simple substance silica flour and copper powder can be distributed evenly in magnesia
Grain, prefabricated particulate material A, between prefabricated particulate material B and crystalline flake graphite, fine grain combination had both been formd, knot of tissue is also had adjusted
Structure.Therefore, coverter pig gas permeable material strength at normal temperature with higher obtained.
(2) introducing of the invention due to controlling the reaction process between different characteristics raw material, avoiding impurity phase, and pre-
Stable fine grain mosaic texture is all formd between the particulate material A of system, prefabricated particulate material B and magnesia particle, therefore, is made
Coverter pig gas permeable material high temperature break resistant intensity with higher.
(3) present invention utilizes additive, foaming agent, thickener etc. in the compound action of different phase, and different originals
Grain graininess difference between material makes the through-hole structure for foring different scale between different feed particles, is ensuring different temperatures
Under the conditions of mechanical strength it is higher simultaneously, impart the stable gas permeability of coverter pig gas permeable material.
(4) preparation process substep is controlled, was both adjusted according to the structure and performance characteristics of coverter pig gas permeable material by the present invention
The not occurrence status of jljl phase, and control formation and the connected state of hole, it realizes to coverter pig permeability material structure
With the ingenious control of performance.In addition, used raw material sources are extensive, production cost is low.
The performance of coverter pig gas permeable material prepared by the present invention is through detecting: bulk density is 2.5~2.9g/cm3；Apparent pore
Rate is 23~31%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 5MPa.
Therefore, production cost of the present invention is low, and prepared coverter pig gas permeable material high temperature break resistant intensity is big, gas permeability is steady
Determine, scour resistance is excellent and long service life.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that material Unify legislation involved in present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment
It states:
The content of MgO of the magnesia powder is greater than 97wt%；The granularity of the magnesia powder is less than 0.088mm.
The content of MgO of the magnesia particle is greater than 97wt%；The granularity of the magnesia particle is 1~3mm.
The magnesium aluminate spinel: Al2O3Content is 60~80wt%；SiO2Content is less than 0.4wt%；Granularity is less than
0.088mm。
α-the Al2O3The Al of micro mist2O3Content is greater than 99wt%；α-the Al2O3The granularity of micro mist is less than 0.01mm.
The Al (OH) of the aluminium hydroxide3Content is greater than 99wt%；The granularity of the aluminium hydroxide is less than 0.045mm.
The additive is zinc oxide or is titanium dioxide, and the purity of the additive is greater than 99wt%；The additive
Granularity be less than 0.088mm.
The Si content of the simple substance silica flour is greater than 99wt%；The granularity of the simple substance silica flour is less than 0.088mm.
The Cu content of the copper powder is greater than 99wt%；The granularity of the copper powder is less than 0.088mm.
The C content of the crystalline flake graphite is greater than 97wt%；The granularity of the crystalline flake graphite is less than 0.088mm.
The pressure of the isostatic pressing is 120~150MPa, and the dwell time is 4~10 minutes.
The AlF of the aluminum fluoride3Content is greater than 99wt%.
The purity of the anhydrous magnesium sulfate is greater than 99wt%.
The foaming agent is neopelex or is lauryl sodium sulfate, and the purity of the foaming agent is greater than
98wt%.
The foam stabilizer is sodium sulfate of polyethenoxy ether of fatty alcohol or is sodium carboxymethylcellulose.
The water-reducing agent is calgon or is sodium tripolyphosphate, and the purity of the water-reducing agent is greater than 98wt%.
The aluminous cement: Al2O3Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content
Less than 0.3wt%.
The viscosity at ambient temperature of the thermosetting phenolic resin is less than 15wt% less than 10000 centipoises, moisture content.
The surfactant is fatty acid methyl ester or is propylene oxide.
The purity of the ammonium metavanadate is greater than 99wt%.
Embodiment 1
A kind of coverter pig gas permeable material and preparation method thereof.It is the step of preparation method described in the present embodiment:
The first step, by the magnesia powder of 45~55wt%, the magnesium aluminate spinel fine powder of 5~10wt%, 1~5wt% α~
Al2O3Micro mist, the aluminium hydroxide of 5~10wt%, the aluminum fluoride of 1~5wt%, the anhydrous magnesium sulfate of 1~5wt%, 1~5wt%
Zinc oxide, the neopelex of 1~5wt%, the sodium sulfate of polyethenoxy ether of fatty alcohol of 1~5wt%, 0.1~1wt%
Sodium tripolyphosphate and 1~5wt% aluminous cement mixing, obtain mixture, then the additional 15~20wt% of mixture
Water, stir evenly, moulding by casting, solidify 10~16 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 12~18 hours under the conditions of 90~120 DEG C, then at 1450~
It is heat-treated 5~7 hours under the conditions of 1550 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, by the thermosetting phenolic resin of 65~75wt%, the fatty acid methyl ester of 1~5wt%, 10~20wt%
The ammonium metavanadate of simple substance silica flour, the copper powder of 1~5wt% and 1~10wt% mixes, and stirs evenly, obtains modified resin.
4th step, by the magnesia particle of 50~60wt%, 5~10wt% the particulate material A, 10~20wt% described in
The modified resin of particulate material B, the crystalline flake graphite of 20~30wt% and 1~5wt% mix, and stir evenly, isostatic pressing,
It is heat-treated 15~20 hours under the conditions of 100~180 DEG C, obtains coverter pig gas permeable material.
The performance of coverter pig gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.5~2.9g/cm3；Aobvious gas
Porosity is 23~30%；Strength at normal temperature is greater than 10MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.
Embodiment 2
A kind of coverter pig gas permeable material and preparation method thereof.It is the step of preparation method described in the present embodiment:
The first step, by the magnesia powder of 50~60wt%, the magnesium aluminate spinel fine powder of 1~5wt%, 5~10wt% α~
Al2O3Micro mist, the aluminium hydroxide of 1~5wt%, the aluminum fluoride of 5~10wt%, the anhydrous magnesium sulfate of 5~10wt%, 1~5wt%
Titanium dioxide, the lauryl sodium sulfate of 1~5wt%, the sodium carboxymethylcellulose of 1~5wt%, 0.1~1wt% six partially
The mixing of the aluminous cement of sodium phosphate and 1~5wt%, obtains mixture, then the water of the additional 10~16wt% of mixture, stirs
It mixes uniformly, moulding by casting solidifies 15~20 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 15~20 hours under the conditions of 90~120 DEG C, then at 1500~
It is heat-treated 5~7 hours under the conditions of 1600 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, by the thermosetting phenolic resin of 70~80wt%, the propylene oxide of 5~10wt%, 10~20wt%
The ammonium metavanadate of simple substance silica flour, the copper powder of 1~5wt% and 1~10wt% mixes, and stirs evenly, obtains modified resin.
4th step, by the magnesia particle of 60~70wt%, 1~5wt% the particulate material A, 10~20wt% described in
The modified resin of particulate material B, the crystalline flake graphite of 10~20wt% and 5~10wt% mixes, and stirs evenly, wait static pressure at
Type is heat-treated 10~15 hours under the conditions of 150~250 DEG C, obtains coverter pig gas permeable material.
The performance of coverter pig gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.5~2.7g/cm3；Aobvious gas
Porosity is 26~31%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 8MPa.
Embodiment 3
A kind of coverter pig gas permeable material and preparation method thereof.It is the step of preparation method described in the present embodiment:
The first step, by the magnesia powder of 40~50wt%, the magnesium aluminate spinel fine powder of 1~5wt%, 5~10wt% α~
Al2O3Micro mist, the aluminium hydroxide of 5~10wt%, the aluminum fluoride of 1~5wt%, the anhydrous magnesium sulfate of 5~10wt%, 1~5wt%
Titanium dioxide, the lauryl sodium sulfate of 1~5wt%, the sodium carboxymethylcellulose of 1~5wt%, 0.1~1wt% six partially
The mixing of the aluminous cement of sodium phosphate and 1~5wt%, obtains mixture, then the water of the additional 15~20wt% of mixture, stirs
It mixes uniformly, moulding by casting solidifies 10~16 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 18~24 hours under the conditions of 90~120 DEG C, then at 1400~
It is heat-treated 5~7 hours under the conditions of 1500 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, by the thermosetting phenolic resin of 60~70wt%, the fatty acid methyl ester of 1~5wt%, 10~20wt%
The ammonium metavanadate of simple substance silica flour, the copper powder of 1~5wt% and 1~10wt% mixes, and stirs evenly, obtains modified resin.
4th step, by the magnesia particle of 60~70wt%, 5~10wt% the particulate material A, 10~20wt% described in
The modified resin of particulate material B, the crystalline flake graphite of 10~20wt% and 1~5wt% mix, and stir evenly, isostatic pressing,
It is heat-treated 15~20 hours under the conditions of 200~300 DEG C, obtains coverter pig gas permeable material.
The performance of coverter pig gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.5~2.9g/cm3；Aobvious gas
Porosity is 27~31%；Strength at normal temperature is greater than 8MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.
Embodiment 4
A kind of coverter pig gas permeable material and preparation method thereof.It is the step of preparation method described in the present embodiment:
The first step, by the magnesia powder of 50~60wt%, the magnesium aluminate spinel fine powder of 5~10wt%, 1~5wt% α~
Al2O3Micro mist, the aluminium hydroxide of 1~5wt%, the aluminum fluoride of 1~5wt%, the anhydrous magnesium sulfate of 1~5wt%, 1~5wt%
Zinc oxide, the neopelex of 1~5wt%, the sodium sulfate of polyethenoxy ether of fatty alcohol of 1~5wt%, 0.1~1wt%
Sodium tripolyphosphate and 1~5wt% aluminous cement mixing, obtain mixture, then the additional 10~16wt% of mixture
Water, stir evenly, moulding by casting, solidify 15~20 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 18~24 hours under the conditions of 90~120 DEG C, then at 1450~
It is heat-treated 5~7 hours under the conditions of 1550 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, by the thermosetting phenolic resin of 70~80wt%, the propylene oxide of 5~10wt%, 10~20wt%
The ammonium metavanadate of simple substance silica flour, the copper powder of 1~5wt% and 1~10wt% mixes, and stirs evenly, obtains modified resin.
4th step, by the magnesia particle of 50~60wt%, 1~5wt% the particulate material A, 10~20wt% described in
The modified resin of particulate material B, the crystalline flake graphite of 20~30wt% and 5~10wt% mixes, and stirs evenly, wait static pressure at
Type is heat-treated 10~15 hours under the conditions of 150~250 DEG C, obtains coverter pig gas permeable material.
The performance of coverter pig gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.6~2.9g/cm3；Aobvious gas
Porosity is 27~31%；Strength at normal temperature is greater than 8MPa；High temperature (1400 DEG C) flexural strength is greater than 6MPa.
Present embodiment has following good effect compared with prior art:
(1) present embodiment utilizes additive, magnesia, aluminium hydroxide, α-Al2O3The raw materials such as micro mist, foaming agent are not
Reaction characteristics under the conditions of synthermal, the prefabricated aplitic texture particulate material based on periclase and magnesium aluminate spinel have more
Grade through-hole structure and high-intensitive feature.In conjunction with the effect of modified resin, it is ensured that simple substance silica flour and copper powder can be evenly distributed
In magnesia particle, prefabricated particulate material A, between prefabricated particulate material B and crystalline flake graphite, fine grain combination was both formd, had also been adjusted
Institutional framework.Therefore, coverter pig gas permeable material strength at normal temperature with higher obtained.
(2) present embodiment due between controlling different characteristics raw material reaction process, avoid drawing for impurity phase
Enter, and all form stable fine grain mosaic texture between prefabricated particulate material A, prefabricated particulate material B and magnesia particle,
Therefore, coverter pig gas permeable material high temperature break resistant intensity with higher obtained.
(3) present embodiment using additive, foaming agent, thickener etc. different phase compound action, with
And the grain graininess difference between different material, make the through-hole structure for foring different scale between different feed particles, is ensuring
Mechanical strength is higher simultaneously under condition of different temperatures, imparts the stable gas permeability of coverter pig gas permeable material.
(4) present embodiment controls preparation process substep according to the structure and performance characteristics of coverter pig gas permeable material
System, had not only had adjusted the occurrence status of not jljl phase, but also control formation and the connected state of hole, realized ventilative to coverter pig
The ingenious control of material structure and performance.In addition, used raw material sources are extensive, production cost is low.
The performance of the coverter pig gas permeable material of present embodiment preparation is through detecting: bulk density is 2.5~2.9g/
cm3；Apparent porosity is 23~31%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 5MPa.
Therefore, present embodiment production cost is low, and prepared coverter pig gas permeable material high temperature break resistant intensity is big, saturating
Gas is stable, scour resistance is excellent and long service life.
Claims (11)
1. a kind of preparation method of coverter pig gas permeable material, it is characterised in that the step of preparation method is:
The first step, by the magnesia powder of 40~60wt%, the magnesium aluminate spinel fine powder of 1~10wt%, 1~10wt% α-Al2O3
Micro mist, the aluminium hydroxide of 1~10wt%, the aluminum fluoride of 1~10wt%, the anhydrous magnesium sulfate of 1~10wt%, 1~5wt% add
Add the calcium aluminate water of agent, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, the water-reducing agent of 0.1~1wt% and 1~5wt%
Mud mixing, obtains mixture, then the water of the additional 10~20wt% of mixture, stirs evenly, moulding by casting, solidification 10~20
Hour, the green body after being solidified；
Second step dries the green body after the solidification 12~24 hours under the conditions of 90~120 DEG C, then at 1400~1600 DEG C
Under the conditions of be heat-treated 5~7 hours, obtain Preburning material；Then the Preburning material is crushed, is sieved, obtain granularity less than 0.25mm
Particulate material A and granularity be 0.25~1mm particulate material B；
Third step, by the thermosetting phenolic resin of 60~80wt%, the surfactant of 1~10wt%, 10~20wt% list
The ammonium metavanadate of matter silicon powder, the copper powder of 1~5wt% and 1~10wt% mixes, and stirs evenly, obtains modified resin；
4th step, by the magnesia particle of 50~70wt%, the particle of the particulate material A of 1~10wt%, 10~20wt%
The modified resin mixing for expecting B, the crystalline flake graphite of 10~30wt% and 1~10wt%, stirs evenly, isostatic pressing, then
It is heat-treated 10~20 hours under the conditions of 100~300 DEG C, obtains coverter pig gas permeable material；
The content of MgO of the magnesia powder is greater than 97wt%, and the granularity of the magnesia powder is less than 0.088mm；
The content of MgO of the magnesia particle is greater than 97wt%, and the granularity of the magnesia particle is 1~3mm；
The magnesium aluminate spinel: Al2O3Content is 60~80wt%, SiO2Content is less than 0.4wt%, and granularity is less than 0.088mm；
α-the Al2O3The Al of micro mist2O3Content is greater than 99wt%, the α-Al2O3The granularity of micro mist is less than 0.01mm；
The Al (OH) of the aluminium hydroxide3Content is greater than 99wt%, and the granularity of the aluminium hydroxide is less than 0.045mm；
The additive is zinc oxide or is titanium dioxide, and the purity of the additive is greater than 99wt%, the grain of the additive
Degree is less than 0.088mm；
The Si content of the simple substance silica flour is greater than 99wt%, and the granularity of the simple substance silica flour is less than 0.088mm；
The Cu content of the copper powder is greater than 99wt%, and the granularity of the copper powder is less than 0.088mm；
The C content of the crystalline flake graphite is greater than 97wt%, and the granularity of the crystalline flake graphite is less than 0.088mm；
The pressure of the isostatic pressing is 120~150MPa, and the dwell time is 4~10 minutes.
2. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the AlF of the aluminum fluoride3Content
Greater than 99wt%.
3. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the anhydrous magnesium sulfate it is pure
Degree is greater than 99wt%.
4. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the foaming agent is dodecane
Base benzene sulfonic acid sodium salt is lauryl sodium sulfate, and the purity of the foaming agent is greater than 98wt%.
5. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the foam stabilizer is fatty alcohol
Polyethenoxy ether sodium sulfate is sodium carboxymethylcellulose.
6. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the water-reducing agent is six inclined phosphorus
Sour sodium is sodium tripolyphosphate, and the purity of the water-reducing agent is greater than 98wt%.
7. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the aluminous cement: Al2O3
Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content be less than 0.3wt%.
8. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the thermosetting phenolic resin
Viscosity at ambient temperature less than 10000 centipoises, moisture content is less than 15wt%.
9. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the surfactant is rouge
Fatty acid methyl esters are propylene oxide.
10. the preparation method of coverter pig gas permeable material according to claim 1, it is characterised in that the purity of the ammonium metavanadate
Greater than 99wt%.
11. a kind of preparation method of coverter pig gas permeable material, it is characterised in that the coverter pig gas permeable material is wanted according to right
Coverter pig gas permeable material prepared by the preparation method of coverter pig gas permeable material described in asking any one of 1~10.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436891A (en) * | 2019-07-18 | 2019-11-12 | 武汉科技大学 | A kind of ladle slag line low carbon magnesia carbon brick and preparation method thereof |
| CN114988890A (en) * | 2022-05-06 | 2022-09-02 | 武汉科技大学 | Cold isostatic pressing formed ultramicropore carbon brick and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107032805A (en) * | 2017-04-05 | 2017-08-11 | 海城市中兴高档镁质砖有限公司 | A kind of ladle Ultra-low carbon Periclase spinel carbon brick and preparation method |
| CN107285807A (en) * | 2017-07-28 | 2017-10-24 | 武汉科技大学 | A kind of lightweight periclase magnesium aluminate spinel ramming mass and preparation method thereof |
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2018
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107032805A (en) * | 2017-04-05 | 2017-08-11 | 海城市中兴高档镁质砖有限公司 | A kind of ladle Ultra-low carbon Periclase spinel carbon brick and preparation method |
| CN107285807A (en) * | 2017-07-28 | 2017-10-24 | 武汉科技大学 | A kind of lightweight periclase magnesium aluminate spinel ramming mass and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436891A (en) * | 2019-07-18 | 2019-11-12 | 武汉科技大学 | A kind of ladle slag line low carbon magnesia carbon brick and preparation method thereof |
| CN114988890A (en) * | 2022-05-06 | 2022-09-02 | 武汉科技大学 | Cold isostatic pressing formed ultramicropore carbon brick and preparation method thereof |
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