CN108975880A - A kind of preparation method of the magnesium brickmaking of low content of magnesium - Google Patents
A kind of preparation method of the magnesium brickmaking of low content of magnesium Download PDFInfo
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- CN108975880A CN108975880A CN201710403803.5A CN201710403803A CN108975880A CN 108975880 A CN108975880 A CN 108975880A CN 201710403803 A CN201710403803 A CN 201710403803A CN 108975880 A CN108975880 A CN 108975880A
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- magnesium
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- low content
- magnesia
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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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
- C04B2235/327—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
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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
- C04B2235/65—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
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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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
- C04B2235/70—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 provides a kind of preparation method of the magnesium brickmaking of low content of magnesium.With magnesia and ball clay for main raw material in the present invention, the iron ore of additional 5%-15% and the calcium oxide of 2%-10% are uniformly mixed for raw material, molding is pressed into using 50-200MPa pressure, is put into high temperature kiln and fires 1300-1600 DEG C, be prepared under the conditions of heat preservation 2-5h.The magnesium brickmaking heat storage capacity of low content of magnesium prepared by the present invention is to 1200 ~ 1300 J/ (kgK), and density is in 2.60 g/cm3More than, refractoriness under load is up to 1450 DEG C or more.
Description
Technical field
The invention belongs to refractory material magnesium brick-making technology fields.More particularly to a kind of preparation side of the magnesium brickmaking of low content of magnesium
Method.
Background technique
Since the new century, the energy saving direction for becoming every country and paying close attention to, the accumulation of energy material of kiln industry
Material becomes the object that everybody pays close attention to, and the basic refractory based on magnesia has bulk density small, heat storage capacity
By force, moderate strength, alkali resistance scouring ability is strong, has both heat-proof quality and high-melting-point performance, is beneficial to energy conservation consumption reduction and satisfaction
The lightweight requirements of material.Liner suitable for high-temperature industrial furnace and container.The main magnesium mine in China concentrates on Liaoning Area, and
The problem that the exploitation bring environment of magnesium mine is unfavorable becomes increasingly conspicuous, and reducing the content of magnesia inside accumulation of heat magnesia brick becomes one
Need key problems-solving.CN102795870A discloses a kind of Light-weight magnesia brick and preparation method thereof.Its technical solution is: first
By the magnesite clinker of 30 ~ 85wt%, the magnesite of 10 ~ 65wt%, the fine silica of 0.5 ~ 4wt%, 0.5 ~ 2% mild-clay
Bonding agent with 1 ~ 3% stirs evenly, compression moulding, spontaneously dries 24 hours, and 8 ~ 24 are kept the temperature under the conditions of 110 DEG C ~ 300 DEG C
Hour, it is then burnt into 3 ~ 12 hours under the conditions of 1350 DEG C ~ 1500 DEG C, magnesia brick is made.CN1451629 discloses a kind of high-speed rail magnesium
The manufacturing method of hercynite brick, high temperature firing are raw material, the iron silicon ratio Fe2O3/ of raw material with light calcined magnesia and iron-bearing material
SiO2=5.5~7.5, magnesium silicon ratio MgO/SiO2=80~180, calcium silicon ratio CaO/SiO2=< 2.5 are burnt at 1600~1750 DEG C
At magnesium iron sand.Grinding screen powder, by magnesium iron sand, the raw material powder containing chrome green and containing zirconium oxide at 0~0.5mm particle, and
The fine powder of < 0.088mm is stand-by.Ingredient and mixing, parts by weight of raw materials ratio are as follows: magnesium iron sand 100, chromite 5~20, zirconium oxide are former
Material 1~3, above-mentioned various granularity aggregates are thrown into batch mixer it is dry-mixed, after mixing be added paper pulp bonding agent, add oxidation
The fine powder of zirconium and appropriate < 0.08mm stir evenly, and powder sufficiently wraps up aggregate.It is again finished product through shaping and drying, firing.
Product component weight ratio are as follows: magnesia 100, two iron 1.2~12 of titanium dioxide, silica 0.5~2.4, zirconium dioxide 1.0
~2.0, siderochrome ratio Fe2O3/Cr2O3 1.8~3.0.It is resistance to that CN1704384 discloses a kind of periclase-olivine light thermal-insulation
Fiery material producing method.Used technical solution is: by weight by 20~80% magnesite powder, 0~50% it is light-burned
Magnesia powder, the silica powder of 10~30 %, 0~15% burn lost article powder, 0~3% bonding agent mixing, additional 4~
10% water stirs evenly, compression moulding after mixing, and green body after molding is 4~24 hours dry at 110 DEG C, then 1300
DEG C~1500 DEG C at a temperature of be burnt into, soaking time be 1~8 hour.The obtained product principal crystalline phase of the present invention be periclase,
Olivine, it not only can directly be contacted with magnesia refractories at high temperature, can also at high temperature with silica refractory
Directly contact.Periclase content in obtained light thermal insulation fire-resistant material in 10~90%, apparent porosity 30~80%,
Have the characteristics that even air hole distribution, intensity are high.As it can be seen that the content of the magnesium brickmaking magnesia of above method preparation is above 80%
More than, the demand to magnesium mine is bigger, this must will affect the production and use in later period.
Summary of the invention
In order to overcome the problems, such as that current content of magnesia is excessive, the present invention proposes a kind of preparation of the magnesium brickmaking of low content of magnesium
Method, specifically:
(1) with magnesia and ball clay for main raw material, the iron ore of additional 5%-15% and the calcium oxide of 2%-10% are that raw material mixing is equal
It is even；
(2) after evenly mixing by step (1) raw material, it is placed on 50-200MPa pressure and is pressed into molding and is put into high temperature kiln and fire
1300-1600 DEG C, keep the temperature 2-5h under the conditions of be prepared.
The preparation method of the magnesium brickmaking of low content of magnesium as described above, it is characterised in that the content of magnesia of the magnesia exists
95% or more.
The preparation method of the magnesium brickmaking of low content of magnesium as described above, it is characterised in that the alumina content of the ball clay exists
65% or more.
The preparation method of the magnesium brickmaking of low content of magnesium as described above, it is characterised in that the additional amount of the magnesia is in 40%-
Between 60%, the additional amount of ball clay is between 30%-50%.
The preparation method of the magnesium brickmaking of low content of magnesium as described above, it is characterised in that briquetting pressure 50-200MPa is burnt
1300-1600 DEG C of temperature processed, soaking time 2-5h.
The preparation method of the magnesium brickmaking of low content of magnesium as described above, it is characterised in that the magnesium brickmaking heat storage capacity of preparation arrives
1200~1300 J/(kg•K)。
The present invention provides a kind of preparation method of the magnesium brickmaking of low content of magnesium:
(1) content for reducing magnesium brickmaking magnesia, is conducive to sustainable production；
(2) preparation method is simple, feasible, is suitble to industrialized production；
(3) the magnesium brickmaking heat storage capacity prepared by is more than magnesia brick heat storage capacity common at present, and intensity and load temperature conform to
It asks.
Specific embodiment:
The characteristics of the present invention is furture elucidated below by example, but be not limited to the embodiment.
Embodiment 1
60% magnesia is added and 40% ball clay is main raw material, additional 15% iron ore, 5% calcium oxide and 3% binder wood
Calcium is uniformly mixed for raw material, is put under 100MPa press and prepares molding magnesia brick, places into and fires 1450 DEG C in high temperature kiln,
The magnesia brick that heat preservation 3h is met the size requirements.It is 1270 J/ (kg K), density by the heat storage capacity of magnesium brickmaking made above
Reach 2.78 g/cm3, refractoriness under load is up to 1600 DEG C.
Embodiment 2
50% magnesia is added and 50% ball clay is main raw material, additional 10% iron ore, 6% calcium oxide and 3% binder wood
Calcium is uniformly mixed for raw material, is put under 150MPa press and prepares molding magnesia brick, places into and fires 1550 DEG C in high temperature kiln,
The magnesia brick that heat preservation 4h is met the size requirements.It is 1240 J/ (kg K), density by the heat storage capacity of magnesium brickmaking made above
Reach 2.68 g/cm3, refractoriness under load is up to 1480 DEG C.
Embodiment 3
55% magnesia is added and 45% ball clay is main raw material, additional 8% iron ore, 3% calcium oxide and 3% binder wood
Calcium is uniformly mixed for raw material, is put under 175MPa press and prepares molding magnesia brick, places into and fires 1520 DEG C in high temperature kiln,
The magnesia brick that heat preservation 3.5h is met the size requirements.It is 1225 J/ (kg K) by the heat storage capacity of magnesium brickmaking made above, it is close
Degree reaches 2.65 g/cm3, refractoriness under load is up to 1470 DEG C.
Embodiment 4
52% magnesia is added and 48% ball clay is main raw material, additional 4% iron ore, 2% calcium oxide and 3% binder wood
Calcium is uniformly mixed for raw material, is put under 110MPa press and prepares molding magnesia brick, places into and fires 1450 DEG C in high temperature kiln,
The magnesia brick that heat preservation 4h is met the size requirements.It is 1250 J/ (kg K), density by the heat storage capacity of magnesium brickmaking made above
Reach 2.65 g/cm3, refractoriness under load is up to 1450 DEG C.
Claims (6)
1. a kind of preparation method of the magnesium brickmaking of low content of magnesium, including ingredient, mixing, molding and sintering, it is characterised in that:
(1) with magnesia and ball clay for main raw material, the iron ore of additional 5%-15% and the calcium oxide of 2%-10% are that raw material mixing is equal
It is even；
(2) after evenly mixing by step (1) raw material, it is placed on 50-200MPa pressure and is pressed into molding and is put into high temperature kiln and fire
1300-1600 DEG C, keep the temperature 2-5h under the conditions of be prepared.
2. the preparation method of the magnesium brickmaking of low content of magnesium according to claim 1, it is characterised in that the oxidation of the magnesia
Content of magnesium is 95% or more.
3. the preparation method of the magnesium brickmaking of low content of magnesium according to claim 1, it is characterised in that the oxidation of the ball clay
Aluminium content is 65% or more.
4. the preparation method of the magnesium brickmaking of low content of magnesium according to claim 1, it is characterised in that the addition of the magnesia
Amount is between 40%-60%, and the additional amount of ball clay is between 30%-50%.
5. the preparation method of the magnesium brickmaking of low content of magnesium according to claim 1, it is characterised in that briquetting pressure 50-
200MPa, 1300-1600 DEG C of firing temperature, soaking time 2-5h.
6. the preparation method of the magnesium brickmaking of low content of magnesium according to claim 1, it is characterised in that the magnesium brickmaking of preparation stores
Thermal energy power is to 1200 ~ 1300 J/ (kgK).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403803.5A CN108975880A (en) | 2017-06-01 | 2017-06-01 | A kind of preparation method of the magnesium brickmaking of low content of magnesium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403803.5A CN108975880A (en) | 2017-06-01 | 2017-06-01 | A kind of preparation method of the magnesium brickmaking of low content of magnesium |
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| CN201710403803.5A Pending CN108975880A (en) | 2017-06-01 | 2017-06-01 | A kind of preparation method of the magnesium brickmaking of low content of magnesium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073136A (en) * | 2022-06-10 | 2022-09-20 | 武汉理工大学 | High-steel-slag-content heat absorption and storage integrated ceramic and preparation method thereof |
| CN115321947A (en) * | 2022-08-11 | 2022-11-11 | 北京华厚能源科技有限公司 | Iron-based heat storage brick and preparation method thereof |
-
2017
- 2017-06-01 CN CN201710403803.5A patent/CN108975880A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073136A (en) * | 2022-06-10 | 2022-09-20 | 武汉理工大学 | High-steel-slag-content heat absorption and storage integrated ceramic and preparation method thereof |
| CN115321947A (en) * | 2022-08-11 | 2022-11-11 | 北京华厚能源科技有限公司 | Iron-based heat storage brick and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181211 |
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| WD01 | Invention patent application deemed withdrawn after publication |