CN106747594A - A kind of preparation method of light microporous magnesia raw material - Google Patents
A kind of preparation method of light microporous magnesia raw material Download PDFInfo
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- CN106747594A CN106747594A CN201611053256.4A CN201611053256A CN106747594A CN 106747594 A CN106747594 A CN 106747594A CN 201611053256 A CN201611053256 A CN 201611053256A CN 106747594 A CN106747594 A CN 106747594A
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- light
- raw material
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- magnesium powder
- kiln
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Classifications
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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
- C04B38/0665—Waste material; Refuse other than vegetable 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
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of preparation method of light microporous magnesia raw material, belongs to technical field of refractory materials.Step and parameter are：Prepare granularity<The light-burning magnesium powder of 0.080mm, the magnesite stone flour and proportion of granularity≤0.080mm are 1.0g/cm3~1.6g/cm3Spent pulping liquor raw material；According to 5~95wt% of light-burning magnesium powder, the ratio of 5~95wt% of magnesite powder is placed in ball mill and grinds 1h~5h altogether, additional gross weight 3%~8% spent pulping liquor mixing；Again adobe is pressed into through forcing press；Dry, burn till after be cooled to room temperature kiln discharge.Advantage is：With good normal temperature and mechanical behavior under high temperature on the premise of ensureing the alkali resistant erosiveness of material without substantially reducing；The load of cylinder can also be reduced while high temperature kiln barrel temperature is reduced, and then realizes energy-saving purpose.
Description
Technical field
The invention belongs to technical field of refractory materials, more particularly to a kind of preparation method of light microporous magnesia raw material.
Background technology
With the rapid growth of China's economy, the construction of China achieves big achievement, but with the loss of resource and
The destruction of environment is cost.Contradiction between fast-developing economic and increasingly bad environment is increasingly highlighted, energy-saving and emission-reduction by
Gradually turn into the emphasis problem that everybody pays close attention to.The lightweight of the industrial refractory materials such as particularly high temperature industry, steel, cement, can
On the premise of keeping the key performances such as the strength of materials, anti-erosion not reduce, should by reducing thermal conductivity reduction material structure heat
Power, improves thermal shock resistance, can not only improve service life, moreover it is possible to reduce Thermal Equipment heat loss, reducing energy consumption.
This technology wants raw material using based on light-burning magnesium powder and magnesite stone flour, by controlling suitable firing process, exploitation one
Plant the magnesia raw material with microcellular structure.The synthesis material has the porosity high, can play fine heat-blocking action, while stomata hole
Footpath is small, and average grain diameter is in below 10um, it is ensured that the alkali resistant erosiveness of material does not influence, while it is good to ensure that material has
Normal temperature and mechanical behavior under high temperature.The thermal conductivity and bulk density of material are can obviously reduce using the refractory product of its index, is reduced
The load of cylinder can also be reduced while high temperature kiln barrel temperature, and then realizes energy-saving purpose.
The content of the invention
It is an object of the invention to provide a kind of preparation method of light microporous magnesia raw material, magnesia fireproof product is solved
Thermal conductivity problem high.Also the substance of refractory product can be reduced, and then reduces barrel radiation and load, and then in extension high temperature kiln
The service life of stove simultaneously, is realized energy-saving.
A kind of preparation method of light microporous magnesia raw material, specific steps and parameter are as follows：
A kind of micropore magnesia raw material, by weight percentage composition be：Light-burning magnesium powder 5%~95%, magnesite powder 5%~
95%, the additional spent pulping liquor for accounting for above-mentioned raw materials gross weight 3%~8%.
1st, raw material prepares：Granularity<The light-burning magnesium powder of 0.080mm, the magnesite stone flour of granularity≤0.080mm, proportion is 1.0g/
cm3~1.6g/cm3Spent pulping liquor.
Content of MgO >=90wt% in light-burning magnesium powder, SiO2Content≤4.0wt%, CaO content≤2.5wt%, calcination subtracts
Amount≤6wt%；
Content of MgO is >=45wt%, CaO, SiO in magnesite stone flour2, Al2O3And Fe2O3Content summation≤2.4wt%；
2nd, batch mixing：The light-burning magnesium powder and magnesite stone flour that step 1 is prepared are according to 5~95wt% of light-burning magnesium powder, magnesite powder 5
The ratio of~95wt% is placed in ball mill and grinds 1h~5h altogether, is then added into kolleroang, and the 3%~8% of additional gross weight
The uniform prepared pug of spent pulping liquor mixing；
3rd, it is molded：The pug that step 2 is obtained is pressed into adobe, the close control 2.5g/cm of adobe body through forcing press3~
2.9g/cm3, moulding press tonnage 400T~1000T；
4th, dry：Step 3 gained adobe is placed in dry kiln and is dried, drying time 20h~50h, dry kiln enters
At 45 DEG C~90 DEG C, drying temperature is controlled at 110 DEG C~180 DEG C mouth temperature control, after control is dry during raw brick moisture content ＜ 0.5%
Kiln discharge；
5th, burn till：Gained adobe is burnt till using hyperthermia tunnel Kiln or shuttle kiln after step 4 is dried, and firing temperature is
1450 DEG C~1700 DEG C, 10h~20h is incubated under firing temperature, room temperature kiln discharge is naturally cooled to after burning till.
The advantage of the invention is that：
1st, light microporous magnesia raw material has average grain diameter in below 10um microcellular structures, is corroded in the alkali resistant for ensureing material
Ability without substantially reduce on the premise of have good normal temperature and mechanical behavior under high temperature.
2nd, preparing refractory product using light microporous magnesia raw material has low heat conductivity and low bulk density, high reducing
The load of cylinder can also be reduced while warm kiln barrel temperature, and then realizes energy-saving purpose.
Specific embodiment
Embodiment 1
A kind of preparation technology of light microporous magnesia raw material, in percentage by weight, raw material composition is：5% magnesia unslacked
Powder, 95% magnesite stone flour, additional 4% spent pulping liquor is bonding agent.During production, various raw materials first are weighed by proportioning, in ball
Pug is obtained through mixing after grinding machine is well mixed, it is most compressing through forcing press afterwards, dried 24 hours in dry kiln, Ran Houjing
High temperature kiln burns till at 1560 DEG C and be made product of the present invention.
The performance indications of products obtained therefrom are：Average pore size is 5.4um, apparent porosity 26.5%, bulk density 2.65g/
cm3。
Embodiment 2
Production technology and embodiment 1 are identical, and difference is：In percentage by weight, raw material composition is：40% is light
Burning magnesium powder, 60% magnesite stone flour, additional 5% spent pulping liquor is bonding agent.The performance indications of products obtained therefrom are：Average pore size
It is 6.9um, apparent porosity 21.5%, bulk density 2.88g/cm3。
Embodiment 3
Production technology and embodiment 1 are identical, and difference is：In percentage by weight, raw material composition is：95% is light
Burning magnesium powder, 5% magnesite stone flour, additional 6% spent pulping liquor is bonding agent.The performance indications of products obtained therefrom are：Average pore size
It is 8.2um, apparent porosity 16.5%, bulk density 2.97g/cm3。
Claims (3)
1. a kind of preparation method of light microporous magnesia raw material, it is characterised in that specific steps and parameter are as follows：
1) raw material prepares：Granularity<The light-burning magnesium powder of 0.080mm, the magnesite stone flour of granularity≤0.080mm, proportion is 1.0g/cm3~
1.6g/cm3Spent pulping liquor；
2) batch mixing：By step 1) light-burning magnesium powder for preparing and magnesite stone flour according to 5~95wt% of light-burning magnesium powder, magnesite powder 5~
The ratio of 95wt% is placed in ball mill and grinds 1h~5h altogether, is then added into kolleroang, and the 3%~8% of additional gross weight
Spent pulping liquor mixing is uniformly obtained pug；
3) it is molded：By step 2) pug that obtains is pressed into adobe, the close control 2.5g/cm of adobe body through forcing press3~2.9g/
cm3, moulding press tonnage 400T~1000T；
4) dry：By step 3) gained adobe is placed in dry kiln and is dried, drying time 20h~50h, dry kiln entrance temperature
At 45 DEG C~90 DEG C, drying temperature is controlled at 110 DEG C~180 DEG C for degree control, is gone out during raw brick moisture content ＜ 0.5% after control is dry
Kiln；
5) burn till：By step 4) dry after gained adobe burnt till using hyperthermia tunnel Kiln or shuttle kiln, firing temperature is
1450 DEG C~1700 DEG C, 10h~20h is incubated under firing temperature, room temperature kiln discharge is naturally cooled to after burning till.
2. method according to claim 1, it is characterised in that step 1) described in light-burning magnesium powder in content of MgO >=
90wt%, SiO2Content≤4.0wt%, CaO content≤2.5wt%, burning decrement≤6wt%.
3. method according to claim 1, it is characterised in that step 1) described in magnesite stone flour in content of MgO for >=
45wt%, CaO, SiO2, Al2O3And Fe2O3Content summation≤2.4wt%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365150A (en) * | 2017-06-29 | 2017-11-21 | 通达耐火技术股份有限公司 | One kind is low to lead magnesium-aluminum-zirconium composite brick and preparation method thereof |
| CN108947567A (en) * | 2018-07-16 | 2018-12-07 | 大连传森科技有限公司 | A kind of light-weight refractory insulation magnesia brick and its processing method |
| CN109485389A (en) * | 2018-11-23 | 2019-03-19 | 辽宁科技大学 | A kind of micropore calcium magnesite and preparation method thereof |
| WO2019053167A1 (en) | 2017-09-15 | 2019-03-21 | Refratechnik Holding Gmbh | Method for producing a porous sintered magnesia, backfill for producing a heavy-clay refractory product with a granulation from the sintered magnesia, product of this type, and method for the production thereof, lining of an industrial furnace and industrial furnace |
| DE202017007171U1 (en) | 2017-09-15 | 2019-12-11 | Refratechnik Holding Gmbh | Porous sintered magnesia, batch for the production of a coarse-ceramic refractory product with a grain from the sintered magnesia, such product and delivery of an industrial furnace and industrial furnace |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365150A (en) * | 2017-06-29 | 2017-11-21 | 通达耐火技术股份有限公司 | One kind is low to lead magnesium-aluminum-zirconium composite brick and preparation method thereof |
| CN110325487A (en) * | 2017-09-15 | 2019-10-11 | 雷法技术控股有限公司 | The liner and industrial furnace of the preparation method of porous sintered magnesia, the backfill material for producing the heavy clay refractory product with sintering oxidation magnesium granules, such product and preparation method thereof, industrial furnace |
| WO2019053167A1 (en) | 2017-09-15 | 2019-03-21 | Refratechnik Holding Gmbh | Method for producing a porous sintered magnesia, backfill for producing a heavy-clay refractory product with a granulation from the sintered magnesia, product of this type, and method for the production thereof, lining of an industrial furnace and industrial furnace |
| DE102017121452A1 (en) | 2017-09-15 | 2019-03-21 | Refratechnik Holding Gmbh | Process for the production of a porous sintered magnesia, batch for the production of a heavy clay fireproof product with a granulation of sintered magnesia, such a product and process for its production, delivery of an industrial furnace and industrial furnace |
| DE102017121452A9 (en) | 2017-09-15 | 2019-10-10 | Refratechnik Holding Gmbh | Process for the production of a porous sintered magnesia, batch for the production of a heavy clay fireproof product with a granulation of sintered magnesia, such a product and process for its production, delivery of an industrial furnace and industrial furnace |
| DE202017007171U1 (en) | 2017-09-15 | 2019-12-11 | Refratechnik Holding Gmbh | Porous sintered magnesia, batch for the production of a coarse-ceramic refractory product with a grain from the sintered magnesia, such product and delivery of an industrial furnace and industrial furnace |
| US11440847B2 (en) * | 2017-09-15 | 2022-09-13 | Refratechnik Holding Gmbh | Method for producing a porous sintered magnesia, backfill for producing a heavy-clay refractory product with a granulation from the sintered magnesia, product of this type, and method for the production thereof, lining of an industrial furnace and industrial furnace |
| CN110325487B (en) * | 2017-09-15 | 2022-10-11 | 雷法技术控股有限公司 | Method for producing porous sintered magnesium oxide, backfill material, product of this type and method for producing the same, lining for an industrial furnace and industrial furnace |
| EP3523264B1 (en) * | 2017-09-15 | 2023-08-16 | Refratechnik Holding GmbH | Method for producing a porous sintered magnesia, backfill for producing a heavy-clay refractory product with a granulation from the sintered magnesia, product of this type, and method for the production thereof, lining of an industrial furnace and industrial furnace |
| AU2018334019B2 (en) * | 2017-09-15 | 2023-10-05 | Refratechnik Holding Gmbh | Method for producing a porous sintered magnesia, batch for producing a coarse ceramic refractory product having a granular material made of the sintered magnesia, such a product and method for its production, lining of an industrial furnace, and industrial furnace |
| DE102017121452B4 (en) | 2017-09-15 | 2024-01-25 | Refratechnik Holding Gmbh | Process for producing a porous sintered magnesia, batch for producing a coarse ceramic refractory product with a grain size from the sintered magnesia, use of the batch for producing the product and process for producing the product |
| DE102017121452B9 (en) | 2017-09-15 | 2024-04-04 | Refratechnik Holding Gmbh | Process for producing a porous sintered magnesia, batch for producing a coarse ceramic refractory product with a grain of sintered magnesia, use of the batch for producing the product and process for producing the product |
| CN108947567A (en) * | 2018-07-16 | 2018-12-07 | 大连传森科技有限公司 | A kind of light-weight refractory insulation magnesia brick and its processing method |
| CN109485389A (en) * | 2018-11-23 | 2019-03-19 | 辽宁科技大学 | A kind of micropore calcium magnesite and preparation method thereof |
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