CN106927795A - A kind of preventing hydration processing method of magnesia-calcium brick - Google Patents
A kind of preventing hydration processing method of magnesia-calcium brick Download PDFInfo
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- CN106927795A CN106927795A CN201710214164.8A CN201710214164A CN106927795A CN 106927795 A CN106927795 A CN 106927795A CN 201710214164 A CN201710214164 A CN 201710214164A CN 106927795 A CN106927795 A CN 106927795A
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- magnesia
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- calcium brick
- calcium
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- 239000011449 brick Substances 0.000 title claims abstract description 55
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 51
- 239000011575 calcium Substances 0.000 title claims abstract description 51
- 230000036571 hydration Effects 0.000 title claims abstract description 17
- 238000006703 hydration reaction Methods 0.000 title claims abstract description 17
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 72
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 36
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 31
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 25
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 24
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000007767 bonding agent Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 150000002148 esters Chemical class 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007654 immersion Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 241001502050 Acis Species 0.000 claims abstract description 6
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000011339 hard pitch Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 235000019580 granularity Nutrition 0.000 abstract 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- 235000001055 magnesium Nutrition 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
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- 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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- 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
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
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Abstract
The present invention relates to a kind of preventing hydration processing method of magnesia-calcium brick, the magnesia-calcium brick is by the magnesia of various granularities, fused magnesite and α-Al2O3Powder, bonding agent composition, preventing hydration treatment is carried out after mixing, discharging, shaping, heat treatment, selection；The preventing hydration processing procedure of magnesia-calcium brick is：The magnesia-calcium brick of sort out is placed in closed vessel, is soaked 2~4 hours in addition waterproof agent, while additional 0.1~0.3MPa/cm2Pressure carry out osmosis；Waterproof agent is organosilicon and acetylacetone,2,4-pentanedione, the mixed solution of esters of silicon acis；Magnesia-calcium brick taking-up nature is dried or dried by immersion after terminating；Raw material by optimizing magnesia-calcium brick of the invention is constituted and carries out osmosis using waterproof agent, can increase substantially the hydration-resistent of magnesia-calcium brick, is made magnesia-calcium brick more easy to maintain, transport and is stored, so that for the popularization and application of magnesia-calcium brick provide good condition.
Description
Technical field
The present invention relates to technical field of fire resistant material production, more particularly to a kind of magnesia-calcium brick preventing hydration processing method.
Background technology
Magnesite-dolomite refractories are a kind of basic refractories, and the furnace lining of steelmaking converter is used as from the beginning of the sixties in last century
Material, is that China's pneumatic steelmaking industrial expansion is made that contribution.To the end of the eighties in last century, because the popularization of magnesia-calcium brick should
With, the consumption of magnesite-dolomite refractories is drastically reduced, almost it is eliminated.And since entering this century, with China's stainless steel
The fast development produced with clean steel, various magnesite-dolomite refractories (have the work(of purification molten steel with its distinctive performance
Can), relatively low price and the advantage in terms of environmental protection be taken seriously again.At present, it has been applied to stainless steel and clean in large quantities
On the refining equipments of high-grade steel kind such as net steel, and developed with speed faster.
Current China's production and the magnesite-dolomite refractories for using include various fired magnesia-calcium bricks, unfired magnesia-calcium brick and magnesium calcium
Matter tundish paint and ramming mass.Wherein unfired magnesia-calcium brick is with various calcium magnesites, fused magnesite and crystalline flake graphite as main former
Material, bonding agent is made with waterless resin.The configuration of the material of brick is usually to do aggregate, fused magnesite and graphite with calcium magnesite to do fine powder.It is mixed
Material, shaping, the unburned brick after shaping will be heat-treated at a temperature of 200~250 DEG C, solidify bonding agent, improve brick
Intensity；Finally it is surface-treated with organic matter again, is prevented its aquation.
Magnesia-calcium brick CaO content is high, and it has the disadvantage easy aquation, makes its production and using by a definite limitation；Therefore, it is domestic
All studied to the preventing hydration technology containing CaO refractory materials outward, main method is using carbonizatin method and phosphate impregnation method pair
Particle surface containing CaO refractory raw materials is processed, or smears anhydrous organic material in particle, forms preventing hydration protective layer,
CaO is hedged off from the outer world and reach the purpose for preventing aquation.Or some additives (TiO is added in dispensing2、ZrO2Deng), burning
Additive generates the high temperature compound of hydration-resisting with CaO reactions during knot.These researchs are mostly in laboratory's examination at present
Test the stage, be also not applied in industrial production.
The content of the invention
The invention provides a kind of preventing hydration processing method of magnesia-calcium brick, constitute and use by the raw material for optimizing magnesia-calcium brick
Waterproof agent carries out osmosis, can increase substantially the hydration-resistent of magnesia-calcium brick, make magnesia-calcium brick it is more easy to maintain, transport and
Storage, so that for the popularization and application of magnesia-calcium brick provide good condition.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of preventing hydration processing method of magnesia-calcium brick, the magnesia-calcium brick is made up of following raw material ratio by weight：2mm≤
20~30 parts of the magnesia of granularity ＜ 4mm, 8~12 parts of the magnesia of 1mm≤granularity ＜ 2mm, the magnesia 11 of 0mm≤granularity ＜ 1mm~
15 parts, 17~21 parts of the magnesia of 200 mesh；3~7 parts of the fused magnesite of 5mm≤granularity ＜ 8mm, 1mm≤granularity ＜ 3mm electric-melting magnesiums
3~7 parts of sand, 3~7 parts of the fused magnesite of 0≤granularity ＜ 1mm, 6~9 parts of the fused magnesite of 200 mesh；α-the Al of 200 mesh2O3Powder 2
~5 parts；2~5 parts of bonding agent；
Magnesia-calcium brick production process：By the magnesia of 2mm≤granularity ＜ 4mm, the 1mm≤magnesia of granularity ＜ 2mm, 5mm≤granularity
Kneaded in fused magnesite, the 1mm≤granularity ＜ 3mm fused magnesites input mixer of ＜ 8mm, kneaded 2~5 minutes；It is subsequently adding
Bonding agent kneads 3~6 minutes, is eventually adding the magnesia of 0mm≤granularity ＜ 1mm, the magnesia of 200 mesh, 0mm≤granularity ＜ 1mm
α-the Al of fused magnesite, the fused magnesite of 200 mesh and 200 mesh2O3Powder, kneads 5~15 minutes；Discharge, be molded, be heat-treated, pick
Choosing；
The treatment of magnesia-calcium brick preventing hydration：The magnesia-calcium brick of sort out is placed in closed vessel, add waterproof agent in immersion 2~
4 hours, while additional 0.1~0.3MPa/cm2Pressure carry out osmosis；Waterproof agent is organosilicon and acetylacetone,2,4-pentanedione, silicon
The mixed solution of acid esters；Each component ratio by weight is：85~95 parts of organosilicon；4~8 parts of acetylacetone,2,4-pentanedione；Esters of silicon acis 3~6
Part；Magnesia-calcium brick taking-up nature is dried or dried by immersion after terminating；
Finished product physical and chemical index：MgO >=96%, Fe2O3≤ 0.8%, SiO2≤ 1.0%, bulk density：3.25~3.30g/
cm3, apparent porosity≤18%, cold crushing strength >=60MPa, refractoriness under load >=1700 DEG C, thermal shock resistance >=16 time.
The bonding agent is made up of following components ratio by weight：0.5~5 part of boric acid or borax；1~7 part of vegetable oil；
1~3 part of hard pitch powder；1~3 part of zirconia powder.
Compared with prior art, the beneficial effects of the invention are as follows：
1) through waterproof agent osmosis, its particle surface can form the protection of isolation air to magnesia-calcium brick of the present invention
Film, is substantially reduced to ambient humidity sensitiveness, and hydration-resisting ability is increased substantially, and is made magnesia-calcium brick more easy to maintain, transport and is stored；
Requirement reduction of the magnesia-calcium brick of the present invention to packing, or its storage period can be extended under equal terms of packing；
2) hard pitch powder and zirconia powder are added in bonding agent, it is to avoid common magnesium calcareous brick is under applied at elevated temperature state
Easy oversintering forms crackle causes the danger of drill steel；
3) magnesia-calcium brick of the present invention is made up of and technique optimizing raw material, and the apparent porosity for making finished bricks is reduced, volume
Density increase, compressive resistance are improved, while having hydration-resisting ability very high, fully meet production stainless steel, clean steel contour
The use requirement of the refining equipment of level steel grade.
Specific embodiment
A kind of preventing hydration processing method of magnesia-calcium brick of the present invention, the magnesia-calcium brick is by following raw material ratio by weight
It is made：20~30 parts of the magnesia of 2mm≤granularity ＜ 4mm, 8~12 parts of the magnesia of 1mm≤granularity ＜ 2mm, 0mm≤granularity ＜ 1mm
11~15 parts of magnesia, 17~21 parts of the magnesia of 200 mesh；3~7 parts of the fused magnesite of 5mm≤granularity ＜ 8mm, 1mm≤granularity ＜
3~7 parts of 3mm fused magnesites, 3~7 parts of the fused magnesite of 0≤granularity ＜ 1mm, 6~9 parts of the fused magnesite of 200 mesh；200 purposes
α-Al2O32~5 parts of powder；2~5 parts of bonding agent；
Magnesia-calcium brick production process：By the magnesia of 2mm≤granularity ＜ 4mm, the 1mm≤magnesia of granularity ＜ 2mm, 5mm≤granularity
Kneaded in fused magnesite, the 1mm≤granularity ＜ 3mm fused magnesites input mixer of ＜ 8mm, kneaded 2~5 minutes；It is subsequently adding
Bonding agent kneads 3~6 minutes, is eventually adding the magnesia of 0mm≤granularity ＜ 1mm, the magnesia of 200 mesh, 0mm≤granularity ＜ 1mm
α-the Al of fused magnesite, the fused magnesite of 200 mesh and 200 mesh2O3Powder, kneads 5~15 minutes；Discharge, be molded, be heat-treated, pick
Choosing；
The treatment of magnesia-calcium brick preventing hydration：The magnesia-calcium brick of sort out is placed in closed vessel, add waterproof agent in immersion 2~
4 hours, while additional 0.1~0.3MPa/cm2Pressure carry out osmosis；Waterproof agent is organosilicon and acetylacetone,2,4-pentanedione, silicon
The mixed solution of acid esters；Each component ratio by weight is：85~95 parts of organosilicon；4~8 parts of acetylacetone,2,4-pentanedione；Esters of silicon acis 3~6
Part；Magnesia-calcium brick taking-up nature is dried or dried by immersion after terminating；
Finished product physical and chemical index：MgO >=96%, Fe2O3≤ 0.8%, SiO2≤ 1.0%, bulk density：3.25~3.30g/
cm3, apparent porosity≤18%, cold crushing strength >=60MPa, refractoriness under load >=1700 DEG C, thermal shock resistance >=16 time.
The bonding agent is made up of following components ratio by weight：0.5~5 part of boric acid or borax；1~7 part of vegetable oil；
1~3 part of hard pitch powder；1~3 part of zirconia powder.
Following examples are implemented under premised on technical solution of the present invention, give detailed implementation method 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
Do not mentionlet alone and bright be conventional method.
【Embodiment】
Magnesia in the present embodiment use content of MgO for 97% medium-grade magnesite, MgO+Fe in fused magnesite2O3>=95%,
SiO2≤ 1.0%.The weight ratio of each constitutive material is as shown in the table：
Magnesia-calcium brick production process：By the magnesia of 2mm≤granularity ＜ 4mm, the 1mm≤magnesia of granularity ＜ 2mm, 5mm≤granularity
Kneaded in fused magnesite, the 1mm≤granularity ＜ 3mm fused magnesites input mixer of ＜ 8mm, kneaded 3 minutes；It is subsequently adding combination
Agent is kneaded 6 minutes, is eventually adding magnesia, the magnesia of 200 mesh, the electric-melting magnesium of 0mm≤granularity ＜ 1mm of 0mm≤granularity ＜ 1mm
α-the Al of sand, the fused magnesite of 200 mesh and 200 mesh2O3Powder, kneads 12 minutes；Discharging, shaping, heat treatment, selection；
The treatment of magnesia-calcium brick preventing hydration：The magnesia-calcium brick of sort out is placed in closed vessel, immersion 3 is small in adding waterproof agent
When, while additional 0.15MPa/cm2Pressure carry out osmosis；Waterproof agent is organosilicon and acetylacetone,2,4-pentanedione, esters of silicon acis
Mixed solution；Each component ratio by weight is：95 parts of organosilicon；7 parts of acetylacetone,2,4-pentanedione；4 parts of esters of silicon acis；Soak magnesium after terminating
Calcium brick takes out nature and dries or dry；
The bonding agent is made up of following components ratio by weight：2 parts of boric acid；5 parts of vegetable oil；3 parts of hard pitch powder；
2 parts of zirconia powder.
Through inspection, the physical and chemical index of finished bricks is as shown in the table：
| Physical and chemical index | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| MgO% (w) | 96.3 | 96.8 | 96.4 |
| Fe2O3) % (w) | 0.68 | 0.71 | 0.73 |
| SiO2% (w) | 0.93 | 0.92 | 0.87 |
| Compressive resistance/MPa | 73.6 | 72.9 | 69.8 |
| Apparent porosity/% | 17.2 | 16.7 | 17.4 |
| Bulk density g/cm3 | 3.26 | 3.25 | 3.25 |
| Thermal shock resistance, secondary (1100 DEG C, water-cooled) | 21 | 20 | 21 |
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (2)
1. the preventing hydration processing method of a kind of magnesia-calcium brick, it is characterised in that the magnesia-calcium brick is by following raw material ratio by weight
It is made：20~30 parts of the magnesia of 2mm≤granularity ＜ 4mm, 8~12 parts of the magnesia of 1mm≤granularity ＜ 2mm, 0mm≤granularity ＜ 1mm
11~15 parts of magnesia, 17~21 parts of the magnesia of 200 mesh；3~7 parts of the fused magnesite of 5mm≤granularity ＜ 8mm, 1mm≤granularity ＜
3~7 parts of 3mm fused magnesites, 3~7 parts of the fused magnesite of 0≤granularity ＜ 1mm, 6~9 parts of the fused magnesite of 200 mesh；200 purposes
α-Al2O32~5 parts of powder；2~5 parts of bonding agent；
Magnesia-calcium brick production process：By the magnesia of 2mm≤granularity ＜ 4mm, the magnesia of 1mm≤granularity ＜ 2mm, 5mm≤granularity ＜ 8mm
Fused magnesite, 1mm≤granularity ＜ 3mm fused magnesites input mixer in knead, knead 2~5 minutes；It is subsequently adding bonding agent
Mixing 3~6 minutes, is eventually adding magnesia, the magnesia of 200 mesh, the electric-melting magnesium of 0mm≤granularity ＜ 1mm of 0mm≤granularity ＜ 1mm
α-the Al of sand, the fused magnesite of 200 mesh and 200 mesh2O3Powder, kneads 5~15 minutes；Discharging, shaping, heat treatment, selection；
The treatment of magnesia-calcium brick preventing hydration：The magnesia-calcium brick of sort out is placed in closed vessel, immersion 2~4 is small in adding waterproof agent
When, while additional 0.1~0.3MPa/cm2Pressure carry out osmosis；Waterproof agent is organosilicon and acetylacetone,2,4-pentanedione, silicic acid
The mixed solution of ester；Each component ratio by weight is：85~95 parts of organosilicon；4~8 parts of acetylacetone,2,4-pentanedione；3~6 parts of esters of silicon acis；
Magnesia-calcium brick taking-up nature is dried or dried by immersion after terminating；
Finished product physical and chemical index：MgO >=96%, Fe2O3≤ 0.8%, SiO2≤ 1.0%, bulk density：3.25~3.30g/cm3, show
The porosity≤18%, cold crushing strength >=60MPa, refractoriness under load >=1700 DEG C, thermal shock resistance >=16 time.
2. the preventing hydration processing method of a kind of magnesia-calcium brick according to claim 1, it is characterised in that the bonding agent by with
Lower component example composition by weight：0.5~5 part of boric acid or borax；1~7 part of vegetable oil；1~3 part of hard pitch powder；Oxidation
1~3 part of zirconium powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113357916A (en) * | 2021-05-28 | 2021-09-07 | 海城利尔麦格西塔材料有限公司 | Magnesium-calcium refractory brick with reinforced protective layer and preparation method thereof |
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| CN102173839A (en) * | 2011-01-28 | 2011-09-07 | 淄博鑫耐达耐火材料股份有限公司 | Binding agent for unfired magnesia brick rich in CaO and preparation method thereof |
| CN105130403A (en) * | 2015-08-14 | 2015-12-09 | 武汉科技大学 | Self-binding calcium oxide material and preparation method thereof |
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| JPS5247017A (en) * | 1975-10-12 | 1977-04-14 | Daido Steel Co Ltd | Manufacture of mgo refractories |
| CN102173839A (en) * | 2011-01-28 | 2011-09-07 | 淄博鑫耐达耐火材料股份有限公司 | Binding agent for unfired magnesia brick rich in CaO and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113357916A (en) * | 2021-05-28 | 2021-09-07 | 海城利尔麦格西塔材料有限公司 | Magnesium-calcium refractory brick with reinforced protective layer and preparation method thereof |
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Address after: 114206 Liaoning City, Anshan Province, Haicheng City, the town of Wang Village, the village of eight Applicant after: Haicheng Lear MEG Materials Co. Ltd. Sita Address before: 114206 Wangjia village, eight Li Town, Haicheng City, Liaoning Province, Anshan, Liaoning Applicant before: Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. |
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Application publication date: 20170707 |