CN105503207B - A kind of resistance to compression magnesia fire-protecting wall - Google Patents
A kind of resistance to compression magnesia fire-protecting wall Download PDFInfo
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- CN105503207B CN105503207B CN201510426092.4A CN201510426092A CN105503207B CN 105503207 B CN105503207 B CN 105503207B CN 201510426092 A CN201510426092 A CN 201510426092A CN 105503207 B CN105503207 B CN 105503207B
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Abstract
The invention discloses a kind of preparation method of Novel compressive magnesia fire-protecting wall：According to mass fraction, 30 40 parts of talcum powder, 55 65 parts of magnesium sulfate, 23 parts of Black Warrior stones, 0.5 part of pelelith, 36 parts of surfactant are uniformly mixed, ball milling material is obtained after ball milling；Ball milling material is dried, first time mechanical pressing, keeps the temperature 8h under the conditions of 500 DEG C, obtain Preburning material；Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters；It is mixed together uniformly plus other raw materials, 180 second of MPa mechanical pressings, dry 15h, finally burns till 3h, up to resistance to compression magnesia fire-protecting wall under the conditions of 1700 DEG C under the conditions of 120 DEG C.The resistance to compression magnesia fire-protecting wall of the present invention has outstanding resistance to compression and thermal shock resistance.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of magnesia fire-protecting wall of fire resisting and preparation method thereof.
Background technology
Magnesia fire-protecting wall is using magnesite, seawater magnesia and dolomite etc. as raw material, using periclase as principal crystalline phase, oxidation
Refractory material of the content of magnesium more than 80%.Belong to basic refractory.
Magnesia fire-protecting wall is strong because having the characteristics that high refractoriness, alkali resistance slag and scum erosiveness, is widely used in smelting
The industries such as gold, cement, glass.But the thermal shock resistance of magnesia fire-protecting wall and acid-resisting gas pickling it is poor be that it is obtained more
Widely applied major obstacle.
Though the magnesia fire-protecting wall prepared at present have the advantages that it is many, but still with it is certain the defects of.Such as add titanium dioxide
Titanium, though magnesium titanate can be generated with magnesia promotes densifying materials, addition aluminium oxide, which forms aluminium titanates, also has similar effect,
Since the mixed proportion of the magnesia larger with the coefficient of expansion is larger, thus material structure is unstable, causes magnesian to occur
Intensity is low, corrosion resistance the problems such as especially acid-resisting gas pickling is poor.
Chinese patent is disclosed a kind of resistance to compression magnesia fire-protecting wall, its structure to preparing primary raw material needed for magnesia fire-protecting wall
It is optimized, therefore after using it in magnesia fire-protecting wall, it not only have adjusted the structure of magnesia fire-protecting wall, and prepared magnesium
Refractory brick has higher compressive resistance（More than 100Mpa, most 120-125Mpa.Although the invention is to a certain degree
The compressive resistance and thermal shock resistance of magnesia fire-protecting wall are improved, however it is in practical application or insufficient.
The present invention is intended to provide a kind of pressure-resistant performance is more preferable, the more prominent novel fire-resistant magnesia fire-protecting wall of thermal shock resistance.
The content of the invention
The shortcomings that present invention is shorter for magnesia fire-protecting wall's service life of the prior art, resistance to compression and bad thermal shock resistance,
A kind of new resistance to compression fire resisting magnesia fire-protecting wall is provided.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of magnesia fire-protecting wall and preparation method thereof.
Preparation method of the present invention comprises the concrete steps that：
（1）According to mass fraction, by 30-40 parts of talcum powder, 55-65 parts of magnesium sulfate, 2-3 parts of Black Warrior stones, 0.5 part of fire
Mountain stone, 3-6 parts of surfactant is uniformly mixed, and ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 10-15h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, is mixed
Close uniformly, 50-60MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 50-55 parts of magnesia particles,
20-25 parts of magnesia powder, 2-3 parts of aquamaine mountain flours, 0.5-1 parts of aluminium riched spinel powder, 10 parts of white carbon are uniformly mixed, then are added mixed
The Ludox of 3% weight of material is closed, is uniformly mixed, 180 second of MPa mechanical pressings, dry 15h, finally exists under the conditions of 120 DEG C
3h is burnt till under the conditions of 1700 DEG C, up to resistance to compression magnesia fire-protecting wall.
Kyanite is one of representative region metamorphic mineral, is gone bad more by argillaceous rocks and formed.It will be formed at the rotten work of middle rank
With pressure it is higher under conditions of.It is present in：Regional metamorphism schist and gneiss and related crystal granite and quartzy vein；With stone
Garnet, staurolite, mica and quartzy symbiosis.The kyanite of natural output, often close to ideal composition.Kyanite high temperature lower body
Product expansion, when the temperature decreases, volume change very little, that is, be the volume-expanding characteristics for having irreversibility conversion to produce；Stability：
The refractory material stability of kyanite production is 1.5 times higher than fireclay refractory；Refractoriness is high：General fireclay refractory
Refractoriness is 1670~1770 DEG C, and kyanite refractory material is typically larger than 1790 DEG C, also special with preferable resist chemical
Property.Due to the characteristic of kyanite mineral, therefore for manufacturing excellent high grade refractory, fireclay mortar, cement and the resistance to system of casting
Product, and plastics ramming mixture, technical ceramics, the spark plug of automobile engine, insulator, ball mill sphere, tester,
Shatter-proof article etc., and available electrothermal way refining silico-aluminum, applied to aircraft, automobile, train, ship component on.
Float stone（Volcanic rock）It is that magma is internal due to strongly reducing for pressure after hurried cooling in volcanic eruption
A kind of glassy lava for having porosity that gas escapes rapidly expansion and formed.Its pore volume accounts for the 50% of rock volume
More than.Because hole is more, light weight, can bubble through the water column be referred to as float stone.Its feature be intensity height, insulation, heat-insulated, sound-absorbing,
Fire prevention, acid and alkali-resistance, corrosion-resistant and pollution-free, "dead" etc., in addition float stone is porous and partition is sharp.Float stone is acid volcano
Rock hardness is 6, and density is less than lg/cm3, can float on the water surface；Insulation is good；It is porous and partition is sharp.Chemism
Height, strong adsorption, has obvious hydraulic gelling property under the effect of hydraulicity exciting agent.
There are the shortcomings that compressive property and thermal shock resistance for magnesia fire-protecting wall.Surprisingly, it was found that specific
Under material rate, its resistance to compression and thermal shock resistance can be significantly improved.
The invention has the beneficial effects that：
（1）Magnesia fire-protecting wall's preparation process of the present invention is simple, is easy to industrialized production.
（2）The magnesia fire-protecting wall that the present invention is prepared has surprising resistance to compression and thermal shock resistance.
（3）Magnesia fire-protecting wall produced by the present invention also has improved corrosion resistance.
Embodiment
Embodiment 1：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 30 parts of talcum powder, 65 parts of magnesium sulfate, 2 parts of Black Warrior stones, 0.5 part of pelelith, 6 parts
Surfactant be uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 10h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 60MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 50 parts of magnesia particles, 25 parts
Magnesia powder, 2 parts of aquamaine mountain flours, 1 part of aluminium riched spinel powder, 10 parts of white carbon be uniformly mixed, then add 3% weight of mixture
Ludox, is uniformly mixed, 180 second of MPa mechanical pressings, the dry 15h under the conditions of 120 DEG C, finally under the conditions of 1700 DEG C
3h is burnt till, up to resistance to compression magnesia fire-protecting wall.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 150MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 30 times.
Embodiment 2：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 40 parts of talcum powder, 55 parts of magnesium sulfate, 3 parts of Black Warrior stones, 0.5 part of pelelith, 3 parts
Surfactant be uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 15h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 50MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 55 parts of magnesia particles, 20 parts
Magnesia powder, 3 parts of aquamaine mountain flours, 0.5 part of aluminium riched spinel powder, 10 parts of white carbon be uniformly mixed, then add 3% weight of mixture
Ludox, be uniformly mixed, 180 second of MPa mechanical pressings, the dry 15h under the conditions of 120 DEG C, finally in 1700 DEG C of conditions
Under burn till 3h, up to resistance to compression magnesia fire-protecting wall.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 190MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 20 times.
Embodiment 3：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 35 parts of talcum powder, 50 parts of magnesium sulfate, 2 parts of Black Warrior stones, 0.5 part of pelelith, 5 parts
Surfactant be uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 14h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 55MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 53 parts of magnesia particles, 23 parts
Magnesia powder, 2 parts of aquamaine mountain flours, 0.7 part of aluminium riched spinel powder, 10 parts of white carbon be uniformly mixed, then add 3% weight of mixture
Ludox, be uniformly mixed, 180 second of MPa mechanical pressings, the dry 15h under the conditions of 120 DEG C, finally in 1700 DEG C of conditions
Under burn till 3h, up to resistance to compression magnesia fire-protecting wall.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 165MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 25 times.
Embodiment 4：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 33 parts of talcum powder, 60 parts of magnesium sulfate, 3 parts of Black Warrior stones, 0.5 part of pelelith, 4 parts
Surfactant be uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 11h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 53MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 51 parts of magnesia particles, 24 parts
Magnesia powder, 3 parts of aquamaine mountain flours, 0.8 part of aluminium riched spinel powder, 10 parts of white carbon be uniformly mixed, then add 3% weight of mixture
Ludox, be uniformly mixed, 180 second of MPa mechanical pressings, the dry 15h under the conditions of 120 DEG C, finally in 1700 DEG C of conditions
Under burn till 3h, up to resistance to compression magnesia fire-protecting wall.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 178MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 21 times.
Embodiment 5：
Comparative example 1：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 39 parts of talcum powder, 59 parts of magnesium sulfate, 2 parts of Black Warrior stones, 6 parts of surfactant
It is uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 13h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 57MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 54 parts of magnesia particles, 21 parts
Magnesia powder, 0.6 part of aluminium riched spinel powder, 10 parts of white carbon be uniformly mixed, then add the Ludox of 3% weight of mixture, mixing
Uniformly, 180 MPa, second of mechanical pressing, dry 15h, finally burns till 3h, under the conditions of 1700 DEG C under the conditions of 120 DEG C to obtain the final product
Resistance to compression magnesia fire-protecting wall.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 108MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 12 times.
Embodiment 6：
Comparative example 2：
A kind of preparation of resistance to compression magnesia fire-protecting wall：
（1）According to mass fraction, by 31 parts of talcum powder, 64 parts of magnesium sulfate, 3 parts of Black Warrior stones, 0.5 part of pelelith, 3 parts
Surfactant be uniformly mixed, ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 12h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 56MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 52 parts of magnesia particles, 22 parts
Magnesia powder, 10 parts of white carbon be uniformly mixed, then add the Ludox of 3% weight of mixture, be uniformly mixed, 180 MPa second
Mechanical pressing, dry 15h, finally burns till 3h, up to resistance to compression magnesia fire-protecting wall under the conditions of 1700 DEG C under the conditions of 120 DEG C.
The cold crushing strength for the magnesia fire-protecting wall that the present embodiment is obtained is 105MPa；At 1100 DEG C, water cooling test bar
Under part, anti-thermal shock number is 5 times.
It can be seen from the above that synergistic effect is played between each component, it is indispensable.
The resistance to compression magnesia refractories of the present invention has extremely excellent resistance to compression and thermal shock resistance, is a kind of outstanding new
Refractory material, great market potential.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme 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 preparation method of resistance to compression magnesia fire-protecting wall, its step are：
（1）According to mass fraction, by 30-40 parts of talcum powder, 55-65 parts of magnesium sulfate, 2-3 parts of Black Warrior stones, 0.5 part of volcano
Stone, 3-6 parts of surfactant is uniformly mixed, and ball milling material is obtained after ball milling.
（2）Ball milling material is dried into 10-15h at 120 DEG C, adds the white carbon of dried 3% weight of ball milling material, mixing is equal
Even, 50-60MPa first time mechanical pressings, keep the temperature 8h under the conditions of 500 DEG C, obtain Preburning material.
（3）Preburning material is crushed, is milled to the grinding material of two kinds of particle diameters：200 mesh and 80 mesh.
（4）According to mass fraction, with the grinding material of 5 part of 200 mesh, the grinding material of 5 part of 80 mesh, 50-55 parts of magnesia particles, 20-25
The magnesia powder, 2-3 parts of aquamaine mountain flours, 0.5-1 parts of aluminium riched spinel powder, 10 parts of white carbon of part are uniformly mixed, then add mixture
The Ludox of 3% weight, is uniformly mixed, 180 second of MPa mechanical pressings, the dry 15h under the conditions of 120 DEG C, finally 1700
3h is burnt till under the conditions of DEG C, up to resistance to compression magnesia fire-protecting wall.
2. the resistance to compression magnesia fire-protecting wall that the preparation method described in claim 1 produces.
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| CN106518101A (en) * | 2016-10-10 | 2017-03-22 | 马鞍山豹龙新型建材有限公司 | Shock resistant refractory brick and preparation method thereof |
| CN107285783A (en) * | 2017-06-30 | 2017-10-24 | 长兴泓矿炉料有限公司 | A kind of noise reduction refractory brick and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912068A (en) * | 1988-11-21 | 1990-03-27 | Dresser Industries, Inc. | Magnesite-carbon refractories |
| CN101928152A (en) * | 2009-06-25 | 2010-12-29 | 鞍钢集团耐火材料公司 | Heat insulation non-burning refractory brick and production method thereof |
| CN104926326A (en) * | 2015-06-10 | 2015-09-23 | 浙江自立股份有限公司 | Al2O3-MgO-SiC-C brick for ladle working linings and preparation method thereof |
-
2015
- 2015-07-20 CN CN201510426092.4A patent/CN105503207B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912068A (en) * | 1988-11-21 | 1990-03-27 | Dresser Industries, Inc. | Magnesite-carbon refractories |
| CN101928152A (en) * | 2009-06-25 | 2010-12-29 | 鞍钢集团耐火材料公司 | Heat insulation non-burning refractory brick and production method thereof |
| CN104926326A (en) * | 2015-06-10 | 2015-09-23 | 浙江自立股份有限公司 | Al2O3-MgO-SiC-C brick for ladle working linings and preparation method thereof |
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Effective date of registration: 20180419 Address after: 423400 Hunan province Chenzhou City Zixing City Applicant after: CHENZHOU LIANHUA REFRACTORY MATERIAL CO., LTD. Address before: Jianshe Road Town, Wuxing District of Zhejiang city of Huzhou province Dai 313000 No. 23 Applicant before: WUXING LIFENG MACHINERY FACTORY |
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