CN109020602A - A kind of hydration-resisting magnesia brick and its production method - Google Patents

A kind of hydration-resisting magnesia brick and its production method Download PDF

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Publication number
CN109020602A
CN109020602A CN201810980997.XA CN201810980997A CN109020602A CN 109020602 A CN109020602 A CN 109020602A CN 201810980997 A CN201810980997 A CN 201810980997A CN 109020602 A CN109020602 A CN 109020602A
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magnesia
brick
hydration
granularity
resisting
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张义先
王新杰
董会彬
陈东明
袁青峰
金钊
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Haicheng Lear Meg Materials Co Ltd Sita
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Haicheng Lear Meg Materials Co Ltd Sita
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Priority to CN201810980997.XA priority Critical patent/CN109020602A/en
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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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
    • 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
    • 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
    • C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
    • 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
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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
    • 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
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

Abstract

The present invention relates to a kind of hydration-resisting magnesia brick and its production method, the hydration-resisting magnesia brick is made of following raw materials ratio by weight: 93~99.5 parts of the magnesia of MgO >=91%；0.5~7 part of paigeite；3 parts of paper pulp；Magnesia brick using the method for the invention production has very high hydration-resisting ability, and the service life of furnace lining can be significantly increased；Paigeite raw material is easy to get and at low cost, uses natural paigeite as additive, the hydration-resisting ability of magnesia brick not only can be improved, and it is expensive to solve current boron-containing additive, the problem of production technology complexity reduces magnesia carbon brick production cost with effect, energy saving.

Description

A kind of hydration-resisting magnesia brick and its production method
Technical field
The present invention relates to technical field of fire resistant material production more particularly to a kind of build the anti-of electric furnace or converter permanent liner Aquation magnesia brick and its production method.
Background technique
At present electric furnace, converter the safety liner overwhelming majority with common magnesia brick (MgO >=91%) build, due to electric furnace water-cooling wall It is run at high temperature with converter saliva ice chest, inevitably frequent leak, leads to the firing for building electric furnace and converter safety liner Magnesia brick aquation in turn results in locally even large area furnace lining and falls off, serious curtailment lining durability.
Application No. is 201110224311.2 Chinese patents to disclose " a kind of manufacturing method of waterproof magnesite brick ", uses 3 parts of 0.5-5 parts of 95-99.5 parts of magnesia, boric acid, the paper pulp of Mg0 >=91%；Compounding, mixing is carried out according to the above ratio, molding, is done The operations such as dry, firing, sorting, are eventually fabricated finished product.Magnesia brick using this method production has very high preventing hydration ability, can have Effect solves the problems, such as electric furnace water-cooling wall and the leak at high temperature of converter saliva ice chest, and furnace lining can be significantly increased uses the longevity Life.Boric acid in the above method as crucial additive is chemical products, expensive, and production cost is caused to increase.
Summary of the invention
The present invention provides a kind of hydration-resisting magnesia brick and its production method, magnesia brick produced has very high hydration-resisting energy The service life of furnace lining can be significantly increased in power；Paigeite raw material is easy to get and at low cost, uses natural paigeite as addition Agent, not only can be improved the hydration-resisting ability of magnesia brick, but also it is expensive to solve current boron-containing additive, and production technology is complicated The problem of, magnesia carbon brick production cost is reduced with effect, it is energy saving.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of hydration-resisting magnesia brick is made of following raw materials ratio by weight:
93~99.5 parts of the magnesia of MgO >=91%；
0.5~7 part of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
A kind of production method of hydration-resisting magnesia brick, includes the following steps:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；By the weight ratio of raw material, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesium is first added Sand adds 0.088 < granularity≤1mm magnesia, mixes 2~5 minutes；Add paper pulp, wet mixing 5 minutes or more；Then same When granularity≤0.088mm magnesia and paigeite is added；It is kneaded 5~15 minutes, discharges again；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 100~140 DEG C, and the time is 12~ 16 hours, it is desirable that moisture content≤0.5% of adobe body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1550~1600 DEG C of firing temperature, firing time 200~300 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to " GB/T 2275-2007 magnesia brick and magnalium Brick " standard execution；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick requires as follows: MgO >=90%；60~120Mpa of compressive resistance； 0.2MPa refractoriness under load T0.6≥1570℃；Bulk density >=2.85g/cm3；Apparent porosity 15~20%.
Compared with prior art, the beneficial effects of the present invention are:
1) compared with existing by the magnesia brick of national standard production, hydration-resisting magnesia brick compressive resistance of the present invention compares Height, bulk density is relatively high, apparent porosity is relatively low, and especially its periclase principal crystalline phase is by more " boron salt liquid phase is cementing " packet It wraps up in, reduces the chance that periclase principal crystalline phase is contacted with water and steam, reduce material significantly and reacted with water and steam Ability can increase substantially lining durability；
2) paigeite raw material is easy to get and at low cost, uses natural paigeite as new additive agent, magnesium not only can be improved The hydration-resisting ability of brick, and solve that current boron-containing additive is expensive, the problem of production technology complexity can effective benefit With natural boron iron ore deposit, magnesia carbon brick production cost is reduced, it is energy saving.
Specific embodiment
A kind of hydration-resisting magnesia brick of the present invention, is made of following raw materials ratio by weight:
93~99.5 parts of the magnesia of MgO >=91%；
0.5~7 part of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
A kind of production method of hydration-resisting magnesia brick, includes the following steps:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；By the weight ratio of raw material, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesium is first added Sand adds 0.088 < granularity≤1mm magnesia, mixes 2~5 minutes；Add paper pulp, wet mixing 5 minutes or more；Then same When granularity≤0.088mm magnesia and paigeite is added；It is kneaded 5~15 minutes, discharges again；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 100~140 DEG C, and the time is 12~ 16 hours, it is desirable that moisture content≤0.5% of adobe body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1550~1600 DEG C of firing temperature, firing time 200~300 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to " GB/T 2275-2007 magnesia brick and magnalium Brick " standard execution；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick requires as follows: MgO >=90%；60~120Mpa of compressive resistance； 0.2MPa refractoriness under load T0.6≥1570℃；Bulk density >=2.85g/cm3；Apparent porosity 15~20%.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments Not mentionleting alone bright is conventional method.
[embodiment 1]
In the present embodiment, a kind of hydration-resisting magnesia brick is made of following raw materials ratio by weight:
98 parts of the magnesia of MgO >=91%；
2 parts of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
Steps are as follows for the manufacturing method of the hydration-resisting magnesia brick:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；In the raw material weight ratio, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesium is first added Sand adds 0.088 < granularity≤1mm granularity magnesia, mixes 3 minutes；Add paper pulp, wet mixing 5 minutes；Then add simultaneously Enter granularity≤0.088mm magnesia and paigeite；It mixes 8 minutes again, discharging；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 120 DEG C, and the time 13 hours, adobe Moisture content≤0.5% in body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1590 DEG C of firing temperature, firing time 220 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to according to " GB/T 2275-2007 magnesium Brick and magnesia-alumina brick " standard execution；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick is as follows: MgO 92.3%；Compressive resistance 105Mpa；0.2MPa Refractoriness under load T0.6≥1573℃；Bulk density >=2.86g/cm3；Apparent porosity 18%.
[embodiment 2]
In the present embodiment, a kind of following raw materials of hydration-resisting magnesia brick ratio by weight is made:
95 parts of the magnesia of MgO >=91%；
5 parts of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
Steps are as follows for the manufacturing method of the hydration-resisting magnesia brick:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；In the raw material weight ratio, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesium is first added Sand adds 0.088 < granularity≤1mm granularity magnesia, mixes 4 minutes；Add paper pulp, wet mixing 6 minutes；Then add simultaneously Enter granularity≤0.088mm magnesia and paigeite；It mixes 10 minutes again, discharging；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 130 DEG C, and the time 14 hours, adobe Moisture content≤0.5% in body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1580 DEG C of firing temperature, firing time 240 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to according to " GB/T 2275-2007 magnesium Brick and magnesia-alumina brick " standard execution；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick is as follows: MgO 93.1%；Compressive resistance 98Mpa；0.2MPa lotus Weight softening temperature T0.6≥1585℃；Bulk density >=2.86g/cm3；Apparent porosity 19%.
[embodiment 3]
In the present embodiment, a kind of hydration-resisting magnesia brick is made of following raw materials ratio by weight:
96 parts of the magnesia of MgO >=91%；
1 part of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
Steps are as follows for the manufacturing method of the hydration-resisting magnesia brick:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；In the raw material weight ratio, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesium is first added Sand adds 0.088 < granularity≤1mm granularity magnesia, mixes 4 minutes；Add paper pulp, wet mixing 10 minutes；Then simultaneously Granularity≤0.088mm magnesia and paigeite is added；It mixes 12 minutes again, discharging；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 140 DEG C, and the time 15 hours, adobe Moisture content≤0.5% in body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1560 DEG C of firing temperature, firing time 260 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to according to " GB/T 2275-2007 magnesium Brick and magnesia-alumina brick " standard execution；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick is as follows: MgO 93.5%；Compressive resistance 106Mpa；0.2MPa Refractoriness under load T0.6≥1582℃；Bulk density >=2.87g/cm3；Apparent porosity 18%.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (2)

1. a kind of hydration-resisting magnesia brick, which is characterized in that be made of following raw materials ratio by weight:
93~99.5 parts of the magnesia of MgO >=91%；
0.5~7 part of paigeite；
3 parts of paper pulp；
The grain size distribution of the magnesia of MgO >=91% ratio by weight are as follows:
2. a kind of production method of hydration-resisting magnesia brick as described in claim 1, which comprises the steps of:
1) raw material crushes and screens fine grinding；The magnesia of MgO >=91% is ground by grain size distribution, is sieved into required granularity；
2) it feeds, be kneaded；By the weight ratio of raw material, 3mm < granularity≤5mm, 1 < granularity≤3mm magnesia is first added, then 0.088 < granularity≤1mm magnesia is added, mixes 2~5 minutes；Add paper pulp, wet mixing 5 minutes or more；Then it is added simultaneously Granularity≤0.088mm magnesia and paigeite；It is kneaded 5~15 minutes, discharges again；
3) it forms；Pug after kneading is added in friction press mold and is press-formed；
4) dry；The adobe of compression moulding is dry in tunnel oven drier, and temperature is 100~140 DEG C, and the time is 12~16 small When, it is desirable that moisture content≤0.5% of adobe body；
5) it is burnt into；Adobe after drying is sent to being burnt into calcining kiln, 1550~1600 DEG C of firing temperature, firing time 200~ 300 minutes；
6) it sorts；Finished product is sorted, permissible variation in dimension and appearance are sorted according to " GB/T 2275-2007 magnesia brick and magnesia-alumina brick " Standard executes；
7) performance indicator；The performance indicator of hydration-resisting magnesia brick requires as follows: MgO >=90%；60~120Mpa of compressive resistance； 0.2MPa refractoriness under load T0.6≥1570℃；Bulk density >=2.85g/cm3；Apparent porosity 15~20%.
CN201810980997.XA 2018-08-27 2018-08-27 A kind of hydration-resisting magnesia brick and its production method Pending CN109020602A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462883A (en) * 2008-12-31 2009-06-24 海城市中兴高档镁质砖有限公司 Low-intensity magnesium brick and production method thereof
CN102372489A (en) * 2011-08-05 2012-03-14 海城市中兴高档镁质砖有限公司 Production method of waterproof magnesite brick
CN107459341A (en) * 2017-07-18 2017-12-12 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick and production method by the use of paigeite as additive
CN108017377A (en) * 2017-11-22 2018-05-11 海城利尔麦格西塔材料有限公司 A kind of magnesium carborundum zirconia block and its production method
CN108033775A (en) * 2017-11-22 2018-05-15 海城利尔麦格西塔材料有限公司 A kind of burned-magnesia brick and its production method that paper pulp is replaced with Dextrose Monohydrate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462883A (en) * 2008-12-31 2009-06-24 海城市中兴高档镁质砖有限公司 Low-intensity magnesium brick and production method thereof
CN102372489A (en) * 2011-08-05 2012-03-14 海城市中兴高档镁质砖有限公司 Production method of waterproof magnesite brick
CN107459341A (en) * 2017-07-18 2017-12-12 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick and production method by the use of paigeite as additive
CN108017377A (en) * 2017-11-22 2018-05-11 海城利尔麦格西塔材料有限公司 A kind of magnesium carborundum zirconia block and its production method
CN108033775A (en) * 2017-11-22 2018-05-15 海城利尔麦格西塔材料有限公司 A kind of burned-magnesia brick and its production method that paper pulp is replaced with Dextrose Monohydrate

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Application publication date: 20181218