CN102219535A - Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof - Google Patents
Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof Download PDFInfo
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- CN102219535A CN102219535A CN2011101089926A CN201110108992A CN102219535A CN 102219535 A CN102219535 A CN 102219535A CN 2011101089926 A CN2011101089926 A CN 2011101089926A CN 201110108992 A CN201110108992 A CN 201110108992A CN 102219535 A CN102219535 A CN 102219535A
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- 229910052596 spinel Inorganic materials 0.000 title claims abstract description 89
- 239000011029 spinel Substances 0.000 title claims abstract description 89
- 239000011449 brick Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005516 engineering process Methods 0.000 title abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract 18
- 230000007797 corrosion Effects 0.000 title abstract 2
- 238000005260 corrosion Methods 0.000 title abstract 2
- 230000024121 nodulation Effects 0.000 title abstract 2
- 230000002265 prevention Effects 0.000 title abstract 2
- 239000004576 sand Substances 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 13
- 239000010419 fine particle Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000003265 pulping liquor Substances 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract 12
- 239000011230 binding agent Substances 0.000 claims abstract 5
- 239000011362 coarse particle Substances 0.000 claims abstract 2
- 229910003023 Mg-Al Inorganic materials 0.000 claims description 18
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 241001504664 Crossocheilus latius Species 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910020068 MgAl Inorganic materials 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 241001131796 Botaurus stellaris Species 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 239000011236 particulate material Substances 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- 238000002203 pretreatment Methods 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 21
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 235000007164 Oryza sativa Nutrition 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000012267 brine Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000002706 hydrostatic effect Effects 0.000 abstract 1
- 235000009566 rice Nutrition 0.000 abstract 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 1
- 238000001238 wet grinding Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 26
- 238000002844 melting Methods 0.000 description 21
- 230000008018 melting Effects 0.000 description 21
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 20
- 239000000292 calcium oxide Substances 0.000 description 18
- 239000003595 mist Substances 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 12
- 239000000571 coke Substances 0.000 description 10
- 239000000446 fuel Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000012071 phase Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001095 magnesium carbonate Substances 0.000 description 6
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 6
- 235000014380 magnesium carbonate Nutrition 0.000 description 6
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 230000005496 eutectics Effects 0.000 description 5
- 239000005329 float glass Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- QRNPTSGPQSOPQK-UHFFFAOYSA-N magnesium zirconium Chemical compound [Mg].[Zr] QRNPTSGPQSOPQK-UHFFFAOYSA-N 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 description 4
- 235000011194 food seasoning agent Nutrition 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- -1 magnesium aluminate Chemical class 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 229910018516 Al—O Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- 229910019092 Mg-O Inorganic materials 0.000 description 1
- 229910019395 Mg—O Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010922 glass waste Substances 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011010 synthetic spinel Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and a production technology thereof. A formula of the recombined magnesia-alumina spinel brick comprises 30 to 40 wt% of fused magnesia-alumina spinel sand with a granularity of 5 to 3 millimeters, 20 to 35 wt% of fused magnesia-alumina spinel sand with a granularity of 4 to 2 millimeters, 5 to 15 wt% of fused magnesia-alumina spinel sand with a granularity of 1 to 0 millimeters, 10 to 15 wt% of fused magnesia-alumina spinel sand with a granularity of 150 to 200 meshes, 5 to 10 wt% of fused magnesia-alumina spinel sand with a granularity of 250 meshes, 1 to 3 wt% of ZrO2 with a granularity of 250 meshes, 1 to 2 wt% of Fe2O3 with a granularity of 250 meshes, and 0 to 1 wt% of CaO with a granularity of 250 meshes. Chemical compositions of the magnesia-alumina spinel brick comprises 26 to 40 wt% of MgO, 55 to 68 wt% of Al2O3, 1.0 to 3.0 wt% of ZrO2, 1.0 to 3.0 wt% of Fe2O3, and 0 to 2.0 wt% of CaO. The production technology of the magnesia-alumina spinel brick comprises the following steps of 1), carrying out a pretreatment on magnesia and alumina, carrying out a synthesis of magnesia-alumina spinel sand, wherein the magnesia-alumina spinel sand contains 26 to 40 wt% of MgO and 55 to 70 wt% of Al2O3, smashing the synthetized magnesia-alumina spinel sand into coarse, medium and fine particles respectively with a granularity of 5 to 3 millimeters, a granularity of 4 to 2 millimeters and a granularity of 1 to 0 millimeters and powder respectively with a granularity of 180 meshes and a granularity of 250 meshes, 2), mixing orderly the coarse particles, medium particles, a binder, the magnesia-alumina spinel powder with a granularity of 150 to 200 meshes, the magnesia-alumina spinel powder with a granularity of 250 meshes, and ZrO2, Fe2O3 and CaO powder according to the formula, and carrying wet milling for 8 to 12 minutes, wherein the binder accounts for 1.0 to 1.8 wt% of the mixed material and is a mixed liquor of spent pulping liquor, brine and polycarboxylic acids, 3), compressing the mixed material obtained from the step 2 into required shapes through multiple devices of a friction press, a Sandes brick machine, a Rice brick machine, a hydrostatic press, etc., and roasting at a temperature of 80 to 160 DEG C for 24 to 72 hours, and 4), heating dry green bodies obtained from the step 3 at a temperature of 1560 to 1710 DEG C for 3 to 5 hours to obtain finished products.
Description
Technical field
The present invention relates to that a kind of preparation has that high resistance to fouling, anti-dross stop up again in conjunction with Mg-Al spinel brick and production technique thereof, belong to the technical field of refractory materials of ceramic.This has high resistance to fouling, heat-shock resistance, prevents that glass flies to expect adhesion, anti-dross, nonclogging excellent properties in conjunction with Mg-Al spinel brick again, be applicable to large-scale float glass furnace regenerator lattice, especially be fit to glass kiln with cheap fuel, as use coal tar, refinery coke glass kiln, the total oxygen/big arch of oxygen-enriched combusting glass kiln as fuel.
Background technology
Glass industry is important base mateiral industry, and is closely related with the national economic development.China is glass production state the biggest in the world, and in the end of the year 2009, sheet glass output has accounted for global output more than 40%.Though the output of China's glass occupies first place in the world, but also there is a big difference for glass industry and advanced international standard, main performance is that energy consumption is high, the average hear rate of China's float glass has been lower than 7800 kilojoule per kilogram glass metals, higher by 20% than external mean level (ML) (6500 kilojoule per kilogram glass metal), the level of emulating the advanced is high by 32%, and is higher by 53% than best level (5100 kilojoule per kilogram glass metal).In recent years, along with oil, coal, electric price are all rising violently, the glass production cost raises day by day, and energy consumption has accounted for about 50% of float glass cost, has brought huge pressure to glass enterprise.Therefore, energy utilization and consumption are depended in the competition in glass market.
For reducing fuel consumption, alleviate the surging pressure of oil price, glass enterprise trial use heavy oil and coal oil mixture, heavy oil and petroleum coke mixtures, cheap refinery coke act as a fuel.Though use cheap refinery coke to lower more than the energy cost 1O%, in refinery coke waste gas after burning and ash content, contain SO as fuel
2, P
2O
5, V
2O
5, during the arrival regenerator of these mixtures, become the higher liquid-solid mud shape mixture of viscosity, be bonded in oil gun, cause the muddy length of flame, and often cause that oil gun stops up and temperature fluctuation; The heavy-gravity material also is bonded on the regenerator lattice, makes CaO, the Al of glass in flying to expect
2O
3, Na
2O, B
2O
3Stick in the refractory materials, the foreign material of these adhesions quicken the erosion to refractory materials.As a result, regenerator occurs boning continuously, causing regenerator and the large-area obstruction of checker, checker brick to be subjected to the intensive erosion in short duration of service, and distortion is until faults such as structure spalling, checker cave in.Is the negative impact that fuel brings to refractory materials in order to adapt to the glass kiln with the refinery coke of cheapness, must study preparation and have anti-erosion, anti-thermal shock, anti, anti-dross, nonclogging novel refractory to substitute current magnesite refractory of being on active service.
The present invention is based on magnesium-aluminium spinel excellent high-temperature performance, in the magnesium-aluminium spinel structure, all be stronger ionic linkage between Al-O, the Mg-O, and ionic bond intensity equates sound construction.Therefore, magnesium-aluminium spinel crystalline saturated structures has good thermal shock resistance energy, chemistry-resistant characteristic and wear resisting property, can keep stability preferably in oxidation or reducing atmosphere.Have very excellent anti-refinery coke combustion exhaust and corrode adhesion that anti-glass flies to expect and erosion.But when synthetic MgAl spinal, meeting is with the volumetric expansion of 5-8%, and its recrystallize ability, is difficult to the magnesium aluminate spinel product of synthesis of densified.The present invention is exactly by adding ZrO
2, Fe
2O
3, CaO preparation can form fatal magnesium aluminate spinel product.ZrO
2Can in refractory brick, generate tiny crack, improve heat-shock resistance; ZrO
2But isolated silicon hydrochlorate phase makes it to reduce wetting to MgO, improves resistance to fouling; ZrO
2Brilliant particle plays pinning effect, has reduced the high temperature creep slippage of material, has improved the high temperature fracture resistance of material.Add Fe
2O
3Produce the MF spinel, it melts admittedly in periclasite and magnesium-aluminium spinel lattice and forms pattern structure, promotes the densified sintering product of spinel brick.
Summary of the invention
The objective of the invention is to study a kind of preparation and have high resistance to fouling, anti-dross stop up again in conjunction with Mg-Al spinel brick and production technique thereof, what make that the present invention makes has high thermal resistance in conjunction with Mg-Al spinel brick again, the complex phase spinel combination rate height that generates, the material densification, show good high-temperature intensity, folding strength, alkali erosiveness, heat-shock resistance, anti-glass flies to expect adhesion, anti-dross, the excellent properties that does not stop up etc., flue gas of anti-refinery coke the and ash content corrode, anti-glass waste adhesion and alkali corrode, do not stop up regenerator, prolong the regenerator material lifetime, be applicable to the high temperature melting furnaces of high alkalinity environment, checker brick as the glass melter regenerator, the branch of spool tile and cement kiln ungirds etc., be particularly useful for glass melter regenerator cheap and that impure more refinery coke acts as a fuel, and total oxygen/big arch of oxygen-enriched combusting glass kiln etc.
In order to change the defective that magnesium-aluminium spinel is difficult for forming dense product, the present invention adds additive and burns agent aid ZrO
2, CaO and Fe
2O
3Utilize the zirconic characteristic that is present in the spinel: ZrO
2Can in refractory brick, generate tiny crack, improve heat-shock resistance; ZrO
2Isolated silicon hydrochlorate phase makes it to reduce wetting to spinel and periclasite, improves resistance to fouling; Cracked ZrO
2Absorb CaO, SiO in the volatilization liquid phase
2To put crystalline distribution, improve the sintering character of magnesite refractory; ZrO
2Brilliant particle plays pinning effect, has reduced the high temperature creep slippage of material, has improved the high temperature fracture resistance of material.In addition, in magnesium-aluminium spinel, add a spot of Fe
2O
3During composition, can form the MF spinel, and melt admittedly in the periclasite lattice, with the crystal formation pattern structure of magnalium.The solubility with temperature of MF spinel in magnesium-aluminium spinel changes and changes, temperature rising solubleness strengthens, when temperature reduces then to have more weak anisotropic dendritic crystal and particulate state inclusion precipitating in magnesium-aluminium spinel particle surface and cleavage crack, the variation of the solubility with temperature fluctuation of MF spinel helps to activate lattice, help promoting the densified sintering product of spinel and growth of periclasite crystalline and goods, this is the sample cold crushing strength height of iron-containing additive, void content is low, the major reason that volume density is big also is the principle that the present invention adds additive and sintering agent.To be two media adsorb the process that causes adhesion with mutual diffusion mutually by infiltrating the space to bonding mutually.Generally be bonded with modes such as physical mechanical interlock, absorption, diffusion.Because the unreactiveness of electric melting magnesium aluminum spinel, glass fly to expect and extremely difficult absorption and the diffusion that forms less than 5A of spinel, are difficult to form the stable cohesive body with intensity, therefore have anti and stop up effect.
By technology of the present invention, add ZrO
2, CaO, Fe
2O
3What additive made has resistance to fouling, heat-shock resistance, wearability in conjunction with Mg-Al spinel brick again, can effectively prevent the V in refinery coke combustion exhaust and the ash content
2O
5, P
2O
5, SO
2Adhesion and erosion, prevent CaO, Al that glass flies to expect
2O
3, Na
2O, B
2O
3Adhesion and erosion, being applicable to the regenerator lattice of large-scale float glass furnace, particularly using the regenerator chamber of glass kiln checker of cheap oil Jiao as fuel, is that a new generation is the large-scale float glass furnace regenerator and the desirable refractory materials of checker of fuel with the refinery coke.In addition, because it has high alkali resistance aggressiveness and heat-shock resistance, also be suitable for the positions such as the big arch of glass kiln of total oxygen/oxygen-enriched combusting.
Technical scheme of the present invention is as follows:
1) in order to improve resistance to fouling, aggregate adopts big crystal grain magnesium-aluminium spinel sand, few, the compact structure of its big crystal grain particle crystal boundary, and resistance to fouling is strong;
2) mix ZrO in the matrix
2, the tiny crack that formation can be toughness reinforcing in refractory brick, the heat-shock resistance of raising material;
3) add calcium oxide, ferric oxide micro mist as sintering aid, acceleration of sintering, the apparent porosity of reduction material improves resistance to fouling, and sintering agent can reduce sintering temperature simultaneously, reduces production energy consumption;
4) in wedding agent spent pulping liquor, mix tensio-active agent (sulfonated naphthalene yuban, poly carboxylic acid etc.), reduce the required pressure of moulding, the electrically charged repulsion when the punching press of few particle institute, raising formability.
Specific embodiment of the present invention is:
1) raw material is synthetic and broken.Electric smelting synthetic MgAl spinal raw material contains Al in the synthetic spinel
2O
355-70wt%, MgO 30-40wt%, the granularity that is broken into then is respectively: 5-3mm, 4-2mm, 1-0mm, 150-200 order, 250 orders.
2) batching.Adopting granularity is the electric melting magnesium aluminum spinel sand 30-40wt% of 5-3mm, granularity is the electric melting magnesium aluminum spinel sand 20-35wt% of 4-2mm, granularity is the electric melting magnesium aluminum spinel sand 5-15wt% of 1-0mm, granularity 150-200 purpose spinel sand 10-15wt%, granularity 250 purpose spinel sand 5-10wt%, granularity 250 purpose ZrO
21-3wt%, granularity 250 purpose Fe
2O
31-2wt%, 250 purpose CaO 0-1wt%.
3) batch mixing.Add macrobead earlier, add the wedding agent that mixes up again, the wedding agent add-on is 1.0-1.8wt%.Add fine particle, fine powder, micro mist, additive and sintering agent ZrO then successively
2, Fe
2O
3, CaO.Synthetic wedding agent is spent pulping liquor, bittern and poly carboxylic acid mixed solution.Powerful batch mixing, the wet stone roller 8-12 minute.
4) be shaped.Compound is pressed into required shape, plurality of devices moulding such as the available friction press that is shaped, Sang De brick pressing machine, this brick pressing machine of Lay, hydropress.
5) drying.In being 80-160 ℃ of dry kiln, temperature is incubated 24-72h.
6) burn till.Dried base substrate is burnt till in 1560 ℃-1710 ℃ insulation 3-5h.
After making is magnesium-aluminium spinel, magnesium zirconium eutectic, magnesium iron and magnesium-aluminium spinel body, calcium aluminate in conjunction with the Mg-Al spinel brick principal crystalline phase again, and main chemical compositions has: MgO content 26-40wt%, Al
2O
3Content 55-68wt%, ZrO
2Content 1.0-3.0wt%, Fe
2O
3Content 1.0-3.0wt%, CaO content 0-2.0wt%.Table 1 has been listed its performance.
The magnesium zirconia block performance of table 1 invention
Embodiment
Embodiment one
It is the electric melting magnesium aluminum spinel sand 40wt% of 5-3mm that raw material adopts granularity, granularity is the electric melting magnesium aluminum spinel sand 20wt% of 4-2mm, granularity is the electric molten magnesite rate spinel sand 10wt% of 1-0mm, granularity 150 purpose electric melting magnesium aluminum spinel sand 10wt%, the electric melting magnesium aluminum spinel sand fine powder 15wt% of granularity 250, granularity 250 purpose desiliconization zirconium white micro mist 2wt%, granularity 250 purpose ferric oxide micro mist 2wt%, granularity 250 purpose calcium oxide micro mist 1wt%.Above raw material is added macrobead earlier, add the wedding agent 1.6wt% that has mixed up again, add fine particle, fine powder, micro mist more successively, the wet stone roller 8 minutes.Adopt hydraulic pressure 300MPa pressure, keep the 60s time to be shaped.Behind the seasoning 48h, push insulation 48h in 120 ℃ of dry kilns.Burn till in 1560 ℃ of insulation 4h.
After making is magnesium-aluminium spinel, magnesium zirconium eutectic, iron calcium aluminate in conjunction with the Mg-Al spinel brick principal crystalline phase again, and main chemical compositions has: MgO content 26.8wt%, Al
2O
3Content 65.8wt% etc., ZrO
2Content 1.98wt%, Fe
2O
3Content 2.58wt%, CaO content 1.87wt%, SiO
2Content 0.83wt%.Its performance index such as table 2:
The magnesium of table 2 example one the spinel brick performance
Embodiment two
It is the electric melting magnesium aluminum spinel sand 30wt% of 5-3mm that raw material adopts granularity, granularity is the electric melting magnesium aluminum spinel sand 30wt% of 4-2mm, granularity is the electric molten magnesite rate spinel sand 15wt% of 1-0mm, granularity 150 purpose electric melting magnesium aluminum spinel sand 10wt%, the electric melting magnesium aluminum spinel sand fine powder 10wt% of granularity 250, granularity 250 purpose desiliconization zirconium white micro mist 3wt%, granularity 250 purpose ferric oxide micro mist 1wt%, granularity 250 purpose calcium oxide micro mist 1wt%.Above raw material is added macrobead earlier, add the wedding agent 1.3wt% that has mixed up again, add fine particle, fine powder, micro mist more successively, the wet stone roller 10 minutes.Adopt hydraulic pressure 400MPa pressure, keep the 60s time to be shaped.Behind the seasoning 24h, push insulation 48h in 160 ℃ of dry kilns.Burn till in 1710 ℃ of insulation 5h.
After making is magnesium-aluminium spinel, magnesium zirconium eutectic, iron calcium aluminate in conjunction with the Mg-Al spinel brick principal crystalline phase again, and main chemical compositions has: MgO content 37.4wt%, Al
2O
3Content 56.3wt% etc., ZrO
2Content 3.00wt%, Fe
2O
3Content 1.16wt%, CaO content 1.57wt%, SiO
2Content 0.52wt%.Its performance index such as table 3:
The Mg-Al spinel brick performance of table 3 example two
Embodiment three
It is the electric melting magnesium aluminum spinel sand 35wt% of 5-3mm that raw material adopts granularity, granularity is the electric melting magnesium aluminum spinel sand 25wt% of 4-2mm, granularity is the electric molten magnesite rate spinel sand 8wt% of 1-0mm, granularity 150 purpose electric melting magnesium aluminum spinel sand 15wt%, the electric melting magnesium aluminum spinel sand fine powder 14wt% of granularity 250, granularity 250 purpose desiliconization zirconium white micro mist 1wt%, granularity 250 purpose ferric oxide micro mist 1wt%, granularity 250 purpose calcium oxide micro mist 1wt%.Above raw material is added macrobead earlier, add the wedding agent 1.5wt% that has mixed up again, add fine particle, fine powder, micro mist more successively, the wet stone roller 12 minutes.The employing friction press is shaped.Behind the seasoning 24h, push insulation 48h in 110 ℃ of dry kilns.Burn till in 1640 ℃ of insulations 4.
After making is magnesium-aluminium spinel, magnesium zirconium eutectic, iron calcium aluminate in conjunction with the Mg-Al spinel brick principal crystalline phase again, and main chemical compositions has: MgO content 32.5wt%, Al
2O
3Content 62.7wt% etc., ZrO
2Content 1.01wt%, Fe
2O
3Content 1.36wt%, CaO content 1.44wt%, SiO
2Content 0.72wt%.Its performance index such as table 4:
The Mg-Al spinel brick performance of table 4 example three
Embodiment four
It is the electric melting magnesium aluminum spinel sand 30wt% of 5-3mm that raw material adopts granularity, granularity is the electric melting magnesium aluminum spinel sand 35wt% of 4-2mm, granularity is the electric molten magnesite rate spinel sand 10wt% of 1-0mm, granularity 150 purpose electric melting magnesium aluminum spinel sand 10wt%, the electric melting magnesium aluminum spinel sand fine powder 11wt% of granularity 250, granularity 250 purpose desiliconization zirconium white micro mist 2wt%, granularity 250 purpose ferric oxide micro mist 2wt%, granularity 250 purpose calcium oxide micro mist 0wt%.Above raw material is added macrobead earlier, add the wedding agent 1.5wt% that has mixed up again, add fine particle, fine powder, micro mist more successively, the wet stone roller 12 minutes.Adopt the Sang De brick pressing machine to be shaped.Behind the seasoning 48h, push insulation 48h in 110 ℃ of dry kilns.Burn till in 1600 ℃ of insulation 4h.
After making is magnesium-aluminium spinel, magnesium zirconium eutectic, iron calcium aluminate in conjunction with the Mg-Al spinel brick principal crystalline phase again, and main chemical compositions has: MgO content 32.6wt%, Al
2O
3Content 61.2wt% etc., ZrO
2Content 2.11wt%, Fe
2O
3Content 2.52wt%, CaO content 0.67wt%, SiO
2Content 0.66wt%.Its performance index such as table 5:
The Mg-Al spinel brick performance of table 5 example four
Claims (2)
- One kind have that high resistance to fouling, anti-dross stop up again in conjunction with Mg-Al spinel brick, it is characterized in that: the prescription of described Mg-Al spinel brick is:
The main chemical compositions of above-mentioned Mg-Al spinel brick is: MgO content 26-40wt%, Al 2O 3Content 55-68wt%, ZrO 2Content 1-3.0wt%, Fe 2O 3Content 1.0-3.0wt%, CaO content 0-3.0wt%. - 2. production technique of producing the described Mg-Al spinel brick of claim 1 is characterized by:1) magnesia and aluminum oxide are carried out pre-treatment, adopt electric smelting method synthetic MgAl spinal sand, contain MgO 26-40wt%, Al in the synthetic MgAl spinal raw material 2O 355-70wt%;2) synthetic MgAl spinal is broken into the carse, medium and small particulate material of 5-3mm, 4-2mm, 1-0mm and 180 orders, 250 purpose powders, according to proportioning raw materials according to following order with coarse particles material, middle particulate material, binding agent, fine particle material, 150-200 order magnesium-aluminium spinel powder, 250 purpose magnesium aluminium spinel powders, ZrO 2, Fe 2O 3, the CaO powder mixes, stone roller 8-12 minute of wet then, described binding agent is spent pulping liquor, bittern and poly carboxylic acid mixed solution, the add-on of binding agent is 1.0-1.8wt%;3) above-mentioned compound is pressed into required shape, plurality of devices moulding such as available friction press, Sang De brick pressing machine, this brick pressing machine of Lay, hydropress are at 80-160 ℃ of baking 24-72h;4) the insulation 3-5h under 1560-1710 ℃ of the green compact after the oven dry burns till.
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| CN101580402A (en) * | 2009-06-22 | 2009-11-18 | 河北理工大学 | Magnesia alumina spinel-zirconia-ferric oxide composite material and preparation method thereof |
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| CN101580402A (en) * | 2009-06-22 | 2009-11-18 | 河北理工大学 | Magnesia alumina spinel-zirconia-ferric oxide composite material and preparation method thereof |
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