CN106396702B - A kind of mgo refractory and preparation method thereof - Google Patents
A kind of mgo refractory and preparation method thereof Download PDFInfo
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- CN106396702B CN106396702B CN201610772597.0A CN201610772597A CN106396702B CN 106396702 B CN106396702 B CN 106396702B CN 201610772597 A CN201610772597 A CN 201610772597A CN 106396702 B CN106396702 B CN 106396702B
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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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- 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
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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
- 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
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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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
- 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
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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
- 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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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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
- 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
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of mgo refractory, consisting of: forsterite 40%-60%, magnesia 15%-20%, calcium oxide 5%-15%, yttrium oxide 5%-15%, 5%-9% parts of bonding agent, plasticizer 1-5%.It is in terms of 100% by the quality of forsterite, the partial size of forsterite matches are as follows: 8-5 mm 20%-30%, 5-3 mm 50%-65%, 3-1 mm 10%-15% is less than 1mm≤5%.Magnesia and forsterite is calcined at high temperature and sintering, refractoriness with higher, yttrium oxide can be such that the body of refractory material densifies, and clinker is prevented to be impregnated with refractory material layer.The grain boundaries that yttrium oxide is concentrated on after calcium oxide and magnesia sintering form solid solution or compound, facilitate the densification degree of yttrium oxide, and have good repellence to basic slag and scum.
Description
Technical field
The present invention relates to technical field of refractory materials, and in particular to a kind of erosion-resisting characteristics is excellent, thermal shock resistance is good, anti-
The mgo refractory and preparation method thereof of slagging effect protrusion.
Background technique
Mullite is the aluminium silicate mineral formed under a kind of high temperature, as a kind of high-quality refractory material, have intensity it is high,
The advantages such as fusing point is high, thermal conductivity is low, are now widely used in kiln, the Thermal Equipment of each industrial circle such as steel, coloured, chemical industry
In structures.But there are still following deficiencies when mullite is used as refractory material: 1) mullite is a kind of high aluminum mineral,
Main ingredient 3Al2O3·2SiO2, vulnerable to invading when being used in the equipment that converter etc. has alkaline atmosphere as refractory material
Erosion.2) it is poor to resist scum, the effect of alkaline body refuse when using in the equipment such as converter for mullite.3) mullite refractory system
The heat-resistant knocking stability of product is poor.
Chinese patent CN2007103045733, patent name high-strength low heat conductivity energy-saving material, in March, 2016 date of application
31 days, disclose one kind using micro-pore mullite as aggregate, addition Reactive alumina, fine silica powder, high-temperature cement with
The fire resistive material product of alumina fine powder has thermal coefficient small, the few advantage of heat loss, but aluminium oxide in the refractory material
Content reaches 52%-81%, keeps the weak refractory material resistive connection slag ability, corrosion resistance and thermal shock resistance poor, thus for steel-making
The equipment such as furnace, metallurgical furnace it is poor for applicability.
Summary of the invention
For high aluminum minerals such as mullites as the thermal shock resistance of refractory material, alkali resistance atmosphere erosiveness and anti-caking
The problem of slag ability difference, the purpose of the present invention is to provide a kind of using the rich magnesiums such as forsterite mineral as raw material, thermal shock resistance
Can be good, corrosion resistance is excellent, the mgo refractory of Anti-slagging effect protrusion.
It is another object of the present invention to provide the preparation methods of the refractory material.
The present invention provides the following technical solution:
A kind of mgo refractory, the composition of the mgo refractory and corresponding mass percent are as follows: magnesium olive
Olive stone 40%-60%, magnesia 15%-20%, calcium oxide 5%-15%, yttrium oxide 5%-15%, bonding agent 5%-9%, plasticizer 1-5%.Oxygen
Changing magnesium is a kind of basic anhydride, there is good hot-face insulation performance, and crystal can be changed by burning through 1000 DEG C or more high temperature, is risen
Then become sintered magnesia to 1500 DEG C or more, thermal conductivity coefficient is low, anti-erosion and stable chemical performance.Forsterite it is main at
Part is 2MgO2SiO2, it is a kind of rich magnesium mineral, there is high temperature resistant, anti-erosion, good chemical stability, and magnesium olive
Olive stone high-temperature calcination decomposes to obtain magnesia.Calcium oxide is also a kind of basic anhydride, and fusing point is 2572 DEG C, is had resistance to well
Hot property.Have with magnesia and calcium oxide refractory material of the invention obtained as the main component to basic slag and scum fine
Repellence.Yttrium oxide is not soluble in water and lye, fusing point are 2439 DEG C, and 4300 DEG C of boils up till, yttrium oxide can be with oxygen
Change magnesium reaction, densifies the body of refractory material, simultaneous oxidation yttrium is reacted with smelting furnace clinker, is made and refractory material working surface
The viscosity of the clinker of contact increases, and clinker is prevented to be impregnated with refractory material layer, inhibits the corrosion to refractory material.Simultaneous oxidation
The grain boundaries that yttrium oxide is concentrated on after calcium and magnesia sintering, form solid solution or compound, facilitate the densification of yttrium oxide
Change degree, acceleration of sintering, and calcia-magnesia-yttrium oxide mixture then plays the role of curing agent simultaneously.
It preferably as one kind of the invention, is the partial size grade of the forsterite in terms of 100% by the quality of forsterite
And corresponding quality proportioning are as follows: 8-5 mm 20%-30%, 5-3 mm 50%-65%, 3-1 mm 10%-15% is less than 1mm≤5%.
The partial size of forsterite can efficiently use the biggish forsterite of partial size in this way, reduce raw material accordingly mainly in 3mm or more
Cost.
It preferably as one kind of the invention, is the composition of the bonding agent and corresponding in terms of 100% by the quality of bonding agent
Mass ratio are as follows: silicon powder 30%-50%, clay 50%-70%.Silicon powder temperature tolerance is good, acid-alkali-corrosive-resisting, stable chemical performance,
It can be filled in powder gap, and be reacted with magnesia and generate gelinite.Clay can form good in conjunction with non-plastic raw material
Good plastic walk.
It preferably as one kind of the invention, is the composition of the plasticizer and corresponding in terms of 100% by the quality of plasticizer
Mass ratio are as follows: bentonite 50%-70%, hydroxypropyl methyl cellulose 30-50%.Bentonitic main ingredient is montmorillonite, brilliant
Body structure is 2:1 type layer structure, is heated to 200-700 DEG C of appearance slowly expansion, forms anhydrous cover in 700-800 DEG C of dehydration and takes off
Then stone is shunk, and start to expand after 950 DEG C or more, have good plasticity, and anhydrous montmorillonite can change it is resistance to
The adhesive force of fiery material surface prevents refractory surface attachment slag etc..Hydroxypropyl methyl cellulose can be to avoid fire proofed wood
Material is cracked very much because of dry fastly after application, and enhances the hardening strength of coating refractory.
Preferably as one kind of the invention, the preparation process of the bonding agent is as follows: taking respectively by corresponding mass ratio
Clay and silicon powder are put into 2 times of clays and the ethylene glycol of silicon powder gross mass, stir 15 minutes at 70 DEG C, make clay and silicon
Micro mist is uniformly dispersed in ethylene glycol.Bonding agent makees solvent using ethylene glycol, silicon powder and clay is dispersed in ethylene glycol
Even, the binding performance showed surpasses silicon powder is directly dry-mixed with clay, and heating stirring facilitates clay and silicon powder
Uniformly mixing.
Preferably as one kind of the invention, the preparation process of the plasticizer is as follows: bentonite, which is ground to, can be sieved through 200
Sieve more than mesh takes the bentonite after grinding by corresponding mass ratio, is added the ethylene glycol of 3 times of bentonite quality, and 70 DEG C
Lower stirring 15 minutes, then takes the hydroxypropyl methyl cellulose of corresponding mass ratio to be added to bentonitic glycolic suspension
In, continue to stir 30 minutes at 70 DEG C, hydroxypropyl methyl cellulose is made to be uniformly dispersed.By after bentonite grind into powder state with
The good mixing effect of hydroxypropyl methyl cellulose, and the gap of the better filling fire resisting material of energy.
Forsterite is carried out clear water removal of impurities and magnetic separation de-iron, then existed by a kind of preparation method of mgo refractory
Dry at 80 DEG C, the forsterite after mill-drying is taken respectively by above-mentioned mass ratio and is ground to the sieve that can be sieved through 80 mesh or more
Forsterite and other raw materials after mill, the forsterite after grinding is uniformly mixed with magnesia, calcium oxide, yttrium oxide, to
The bonding agent prepared is added in mixture, is mixed 15 minutes at 50 DEG C, continuously adds the plasticizer prepared, mixes 15 points
Clock, then dry 10-12 hour at 220 DEG C -290 DEG C, through 1500 DEG C -1730 DEG C of calcinings 2 hours, be cooled to 1000 DEG C -
1180 DEG C heat preservation 2.5-5 hours, be cooled to 550 DEG C of -620 DEG C of heat preservations 2.5-5 hours, be cooled to 220 DEG C of -290 DEG C of heat preservation 1.0-
2.5 hours, it is naturally cooling to room temperature, is encapsulated.Before mixing each raw material, forsterite is ground to fine powder state, is facilitated
The uniform mixing of each raw material, whipping temp, which is arranged at 50 DEG C, then facilitates being uniformly dispersed for bonding agent and plasticizer, makes resistance to
The component composition of fiery material each section uniformly, stablize by performance, is calcined after dry, with remove the igloss in forsterite at
Part.It in such a way that the stage cools down, realizes that refractory material is down to room temperature, avoids temperature decrease from making certain components that crystal form occur and turn
Change, influences the using effect of refractory material.
Beneficial effects of the present invention are as follows:
The advantages of refractory material of the present invention has thermal shock resistance good, and corrosion resistance is excellent, and Anti-slagging effect is protruded:
1) magnesia and forsterite is calcined at high temperature and sintering, refractoriness with higher, magnesia and oxidation
Calcium has good repellence to basic slag and scum.
2) yttrium oxide can be such that the body of refractory material densifies, and clinker is prevented to be impregnated with refractory material layer, inhibition pair
The corrosion of refractory material.The grain boundaries that yttrium oxide is concentrated on after calcium oxide and magnesia sintering, form solid solution or compound,
Facilitate the densification degree of yttrium oxide.
3) the anhydrous montmorillonite that bentonite is formed after firing, can change the adhesive force of refractory surface, prevent resistance to
Fiery material surface attachment slag etc..
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the limitation not to its protection scope:
In the present invention, if not refering in particular to, used raw material is available on the market or commonly used in the art, following
Method in embodiment is unless otherwise instructed the conventional method of this field.
The partial size grade and corresponding quality proportioning of forsterite used in the present invention are as follows: be with the quality of forsterite
100% meter, 8-5 mm 20%-30%, 5-3 mm 50%-65%, 3-1 mm 10%-15% are less than 1mm≤5%.
The composition of bonding agent used in the present invention and corresponding mass ratio are as follows: by the quality of bonding agent be 100% in terms of, knot
The composition of mixture and corresponding mass ratio are as follows: silicon powder 30%-50%, clay 50%-70%.
The preparation process of bonding agent used in the present invention is as follows: clay and silicon powder are taken respectively by corresponding mass ratio,
It is put into 2 times of clays and the ethylene glycol of silicon powder gross mass, is stirred 15 minutes at 70 DEG C, make clay and silicon powder in ethylene glycol
It is uniformly dispersed.
The composition of plasticizer used in the present invention and corresponding mass ratio are as follows: by the quality of plasticizer be 100% in terms of, swelling
Native 50%-70%, hydroxypropyl methyl cellulose 30-50%.
The preparation process of plasticizer used in the present invention is as follows: bentonite being ground to the sieve that can be sieved through 200 mesh or more, is pressed
Corresponding mass ratio takes the bentonite after grinding, and the ethylene glycol of 3 times of bentonite quality is added, and stirs 15 minutes at 70 DEG C, so
It takes the hydroxypropyl methyl cellulose of corresponding mass ratio to be added in bentonitic glycolic suspension afterwards, continues to stir at 70 DEG C
30 minutes, hydroxypropyl methyl cellulose is made to be uniformly dispersed.
Embodiment 1:
A kind of mgo refractory, composition and corresponding mass percent are as follows: forsterite 40%, magnesia 20%,
Calcium oxide 15%, yttrium oxide 15%, bonding agent 9%, plasticizer 1%.
The preparation method of mgo refractory: forsterite is subjected to clear water removal of impurities and magnetic separation de-iron, then at 80 DEG C
Lower drying, forsterite after mill-drying to the sieve that can be sieved through 80 mesh or more, after taking grinding respectively by above-mentioned mass ratio
Forsterite and other each raw materials, the forsterite after grinding is uniformly mixed with magnesia, calcium oxide with yttrium oxide, to mix
It closes in material and the bonding agent prepared is added, mixed 15 minutes at 50 DEG C, continuously add the plasticizer prepared, mix 15 minutes,
Then 10 hours dry at 220 DEG C, it is calcined 2 hours through 1500 DEG C, is cooled to 1000 DEG C and keeps the temperature 2.5 hours, be cooled to 550 DEG C
Heat preservation 2.5 hours is cooled to 220 DEG C and keeps the temperature 1.0 hours, be naturally cooling to room temperature, encapsulates.
Embodiment 2:
A kind of mgo refractory, component and corresponding mass percent are as follows: forsterite 55%, magnesia 17%,
Calcium oxide 13%, yttrium oxide 5%, bonding agent 5%, plasticizer 5%.
The preparation method of mgo refractory: forsterite is subjected to clear water removal of impurities and magnetic separation de-iron, then at 80 DEG C
Lower drying, forsterite after mill-drying to the sieve that can be sieved through 80 mesh or more, after taking grinding respectively by above-mentioned mass ratio
Forsterite and other each raw materials, the forsterite after grinding is uniformly mixed with magnesia, calcium oxide with yttrium oxide, to mix
It closes in material and the bonding agent prepared is added, mixed 15 minutes at 50 DEG C, continuously add the plasticizer prepared, mix 15 minutes,
Then 11 hours dry at 250 DEG C, it is calcined 2 hours through 1600 DEG C, is cooled to 1100 DEG C and keeps the temperature 4 hours, be cooled to 580 DEG C of guarantors
Temperature 4 hours is cooled to 250 DEG C and keeps the temperature 2.0 hours, be naturally cooling to room temperature, encapsulates.
Embodiment 3:
A kind of mgo refractory, component and corresponding mass percent are as follows: forsterite 60%, magnesia 15%,
Calcium oxide 5%, yttrium oxide 10%, bonding agent 7%, plasticizer 3%.
The preparation method of mgo refractory: forsterite is subjected to clear water removal of impurities and magnetic separation de-iron, then at 80 DEG C
Lower drying, forsterite after mill-drying to the sieve that can be sieved through 80 mesh or more, after taking grinding respectively by above-mentioned mass ratio
Forsterite and other each raw materials, the forsterite after grinding is uniformly mixed with magnesia, calcium oxide with yttrium oxide, to mix
It closes in material and the bonding agent prepared is added, mixed 15 minutes at 50 DEG C, continuously add the plasticizer prepared, mix 15 minutes,
Then 12 hours dry at 290 DEG C, it is calcined 2 hours through 1730 DEG C, is cooled to 1180 DEG C and keeps the temperature 5 hours, be cooled to 620 DEG C of guarantors
Temperature 5 hours is cooled to 290 DEG C and keeps the temperature 2.5 hours, be naturally cooling to room temperature, encapsulates.
The test performance of the refractory material of the refractory material and comparative example 1 of embodiment 1-3 preparation is shown in Table 1, wherein comparative example 1
For commercially available mullite aluminous refractory.Water is added in each refractory material before test and latex stirs, then in a usual manner
It is applied on test pole, tests after drying.Test pole is that celion cloth material is made, and highest can bear 2500 DEG C of height
Temperature.Thermal shock resistance is indicated with the number of alternations being able to bear between water cooling and 1400 DEG C.Corrosion resistance is with copper smelter slag 1400
DEG C when erode test after Erosion Size indicate, wherein the test result of comparative example 1 be 100, the bigger expression of test result
Corrosion resistance is lower.Anti- clinkering property then with erosion test after, the infiltration size Expressing of copper smelter slag, the wherein survey of comparative example 1
Test result is 100, and test result numerical value is bigger to indicate that anti-clinkering property is weaker.
Table 1
| —— | Comparative example 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Softening temperature DEG C | ≥1680 | ≥1750 | ≥1750 | ≥1750 |
| Thermal shock resistance | 38 | 52 | 43 | 48 |
| Corrosion resistance | 100 | 80 | 71 | 62 |
| Anti- clinkering property | 100 | 79 | 70 | 60 |
Claims (2)
1. a kind of mgo refractory, which is characterized in that the composition of the mgo refractory and corresponding quality percentage
Than are as follows: forsterite 40%-60%, magnesia 15%-20%, calcium oxide 5%-15%, yttrium oxide 5%-15%, bonding agent
5%-9%, plasticizer 1%-5%；
It is the composition of the bonding agent and corresponding mass ratio are as follows: silicon powder 30%- in terms of 100% by the quality of bonding agent
50%, clay 50%-70%；
The bonding agent is made through following procedure: take clay and silicon powder respectively by corresponding mass ratio, be put into 2 times of clays with
In the ethylene glycol of silicon powder gross mass, is stirred 15 minutes at 70 DEG C, clay and silicon powder is made to be uniformly dispersed in ethylene glycol；
It is the composition of the plasticizer and corresponding mass ratio are as follows: bentonite 50%- in terms of 100% by the quality of plasticizer
70%, hydroxypropyl methyl cellulose 30-50%；
The bentonite is made through following procedure: bentonite being ground to the sieve that can be sieved through 200 mesh or more, by corresponding quality
Ratio takes the bentonite after grinding, and the ethylene glycol of 3 times of bentonite quality is added, stirs 15 minutes at 70 DEG C, then takes corresponding matter
The hydroxypropyl methyl cellulose of amount ratio is added in bentonitic glycolic suspension, continues to stir 30 minutes at 70 DEG C, make
Hydroxypropyl methyl cellulose is uniformly dispersed；
The mgo refractory is made through following procedure: forsterite being carried out clear water removal of impurities and magnetic separation de-iron, is then existed
Dry at 80 DEG C, the forsterite after mill-drying is taken respectively by above-mentioned mass ratio and is ground to the sieve that can be sieved through 80 mesh or more
Forsterite and other raw materials after mill, the forsterite after grinding is uniformly mixed with magnesia, calcium oxide, yttrium oxide, to
The bonding agent prepared is added in mixture, is mixed 15 minutes at 50 DEG C, continuously adds the plasticizer prepared, mixes 15 points
Clock, then dry 10-12 hour at 220 DEG C -290 DEG C, through 1500 DEG C -1730 DEG C of calcinings 2 hours, be cooled to 1000 DEG C -
1180 DEG C heat preservation 2.5-5 hours, be cooled to 550 DEG C of -620 DEG C of heat preservations 2.5-5 hours, be cooled to 220 DEG C of -290 DEG C of heat preservation 1.0-
2.5 hours, it is naturally cooling to room temperature, is encapsulated.
2. mgo refractory according to claim 1, which is characterized in that by the quality of forsterite be 100% in terms of,
The partial size grade and corresponding quality proportioning of the forsterite are as follows: 8-5mm 20%-30%, 5-3mm 50%-65%, 3-
1mm 10%-15% is less than 1mm≤5%.
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| CN102617165A (en) * | 2012-03-28 | 2012-08-01 | 宜兴新威利成耐火材料有限公司 | Forsterite fireproof castable |
| CN103360084A (en) * | 2012-04-06 | 2013-10-23 | 孙莹 | Novel refractory material |
| CN105263883A (en) * | 2013-06-28 | 2016-01-20 | 耐火材料控股有限公司 | Refractory batch and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE894731A (en) * | 1982-10-19 | 1983-02-14 | Plumat Emile | Refractory material fabrication - by highly exothermic reaction of carbide(s) with oxide particles and oxidising agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145995A (en) * | 2011-04-06 | 2011-08-10 | 瑞泰科技股份有限公司 | Magnesium-zirconium brick with high erosion resistance and thermal shock resistance for RH furnace and production technology thereof |
| CN102617165A (en) * | 2012-03-28 | 2012-08-01 | 宜兴新威利成耐火材料有限公司 | Forsterite fireproof castable |
| CN103360084A (en) * | 2012-04-06 | 2013-10-23 | 孙莹 | Novel refractory material |
| CN105263883A (en) * | 2013-06-28 | 2016-01-20 | 耐火材料控股有限公司 | Refractory batch and use thereof |
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