CN108164256A - A kind of pink fused alumina spinelle crucible and preparation method thereof - Google Patents

A kind of pink fused alumina spinelle crucible and preparation method thereof Download PDF

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Publication number
CN108164256A
CN108164256A CN201711453274.6A CN201711453274A CN108164256A CN 108164256 A CN108164256 A CN 108164256A CN 201711453274 A CN201711453274 A CN 201711453274A CN 108164256 A CN108164256 A CN 108164256A
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crucible
spinelle
fused alumina
pink fused
water
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潘起雄
韩建燊
王刚
程国胜
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ZHONGSHAN HUASHAN SPECIAL CERAMICS CO Ltd
Sinosteel Luoyang Institute of Refractories Research Co Ltd
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ZHONGSHAN HUASHAN SPECIAL CERAMICS CO Ltd
Sinosteel Luoyang Institute of Refractories Research Co Ltd
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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
    • C04B35/01—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
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    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
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Abstract

The invention discloses a kind of pink fused alumina spinelle crucible and preparation method thereof, pink fused alumina spinelle crucible is prepared by the following raw material：Corundum in granules 36 49%, spinel particle 18 25%, spinelle fine powder 10 16%, calcined alumina micro mist 6 12%, electrically molten magnesia powder 2 4%, chrome green powder 6 12%, aluminous cement 1 3%, water-reducing agent 0.08 0.15%, water 4 6%.The present invention is by moulding by casting and passes through high temperature sintering and prepares pink fused alumina spinelle crucible, Processes and apparatus is simple, production efficiency is high, abundant vibration air exhaust makes crucible consistency high during moulding by casting, and particle, which is combined closely, in high-temperature sintering process makes high crucible intensity, resistance to erosion and erosion performance fabulous.Crucible internal walls material is not easily to fall off during use, without fettling, significantly improves pot life, also may help to improve the quality of casting, preferably meets needed for metal casting production high-quality casting.

Description

A kind of pink fused alumina spinelle crucible and preparation method thereof
Technical field
The present invention relates to a kind of crucible, particularly a kind of pink fused alumina spinelle crucible, the invention further relates to pink fused alumina points The preparation method of spar crucible.
Background technology
The universal use feeling of casting industry answers electro-smelting metal, convenient for controlling, adjusting the temperature of molten metal and ingredient.Sense The furnace lining for answering electric furnace is the container for containing molten metal, is in direct contact with molten metal.It is rushed during due to melting by molten metal Brush, the chemical erosion of clinker and discontinuous operation are frequently under conditions of rapid heat cycle, and furnace lining is easily cracked, part is invaded Erosion, peeling etc..Therefore, how to obtain with performances such as higher consistency, excellent resistant to corrosion, resistance to erosion, resistance to rapid heat cycles Long-life furnace lining be one of main problem of each foundry enterprise concern.
The Induction Furnace liner of casting industry is generally with silica crucible, magnesia crucible, bauxite crucible, corundum-mullite Crucible and corundum spinel crucible, forming method are ramming process or isostatic pressing.Current crucible of electric induction furnace uses Service life, existing main problem was that anti-erosion and erosion are insufficient, is rushed during use by metallic solution generally in 100 stoves or so Inner-wall material constantly comes off during brush, needs to be repaired frequently, not only influences production efficiency, but also the material to come off can pollute steel Liquid reduces the quality of metal casting.
Invention content：
Present invention seek to address that scarce limit and deficiency present in the prior art, provide a kind of consistency height, resistant to corrosion, resistance to punching Excellent pink fused alumina spinelle crucible of brush, thermal shock resistance and preparation method thereof.
The present invention uses following technical scheme：
A kind of pink fused alumina spinelle crucible by mass percentage, is mainly prepared by the following raw material：Corundum Grain 36-49%, spinel particle 18-25%, spinelle fine powder 10-16%, calcined alumina micro mist 6-12%, electrically molten magnesia Powder 2-4%, chrome green powder 6-12%, aluminous cement 1-3%, water-reducing agent 0.08-0.15%, water 4-6%.
Preferably, the corundum in granules is plate diamond spar or white fused alumina.
Preferably, the spinel particle and spinelle fine powder are electric smelting spinelle or sintering spinelle.
Preferably, the water-reducing agent is calgon or sodium tripolyphosphate.
The granularity of corundum in granules is 9-1mm, the granularity of spinel particle is 1-0.1mm, the granularity of spinelle fine powder≤ 0.075mm, granularity≤0.005mm of calcined alumina micro mist, granularity≤0.045mm of electrically molten magnesia powder, the grain of chrome green powder Degree≤0.045mm.
Corundum in granules is plate diamond spar or white fused alumina, and chemical composition requirement is Al2O3Content >=99.5%；Spinel particle It is electric smelting spinelle or sintering spinelle with spinelle fine powder, chemical composition requirement is Al2O3Content >=70%；Calcined alumina The requirement of micro mist chemical composition is Al2O3Content >=99.7%；The requirement of electrically molten magnesia powder chemical composition is content of MgO >=99%；Chromium Green powder chemical composition requires Cr2O3Content >=99%；Aluminous cement chemical composition requires Al2O3Content >=70%.
A kind of preparation method of pink fused alumina spinelle crucible, includes the following steps：
(1) water-reducing agent is taken to be placed in water, stirring is to being completely dissolved, stand for standby use；
(2) it fixes, is positioned on shake table after releasing agent is brushed on crucible die, it is spare；
(3) corundum in granules, spinel particle are put into blender, mix 10~20min, then by spinelle fine powder, calcining Alumina powder, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(4) solution in step (1) is poured into blender, continues 3~7min of stirring, discharge after mixing；
(5) shake table is opened, the material in step (4) is poured slowly into crucible die, treats that material full of mold, continues to vibrate Air is discharged, closes shake table, is stood；
(6) it is demoulded after conserving 18-24h, crucible is put into drying chamber, temperature is adjusted to 30-50 DEG C, 60-80 DEG C, 100-120 DEG C, 150-170 DEG C dry 5-7h respectively；
(7) dried crucible is put into kiln, is warming up to 1400-1600 DEG C with 2-3 DEG C/min, heat preservation 4-7h firings.
Preferably, demoulded after maintenance 20h in step (6), crucible be put into drying chamber, temperature be adjusted to 40 DEG C, 70 DEG C, 110 DEG C, 160 DEG C dry 6h respectively；；
Preferably, in step (7), 1520 DEG C are warming up to 2-3 DEG C/min, heat preservation 5h firings.
Beneficial effects of the present invention：
1st, the present invention by moulding by casting and passes through high temperature sintering and prepares pink fused alumina spinelle crucible, Processes and apparatus letter It is single, production efficiency is high, abundant vibration air exhaust makes crucible consistency high during moulding by casting, and particle is combined closely in high-temperature sintering process Make high crucible intensity, resistance to erosion and erosion performance fabulous.
2nd, the present invention is utilized in high-temperature sintering process, Cr2O3With Al2O3, MgO occur solid solution reaction, MgO and Al2O3Hair Raw spinel reaction, compensates for the stomata between particulate interspaces, improves consistency, greatly improve resistance to erosion and corrosion resistance Energy.
3rd, the present invention utilizes Cr2O3With Al2O3Solid solution forms between pink fused alumina and magnesium aluminate spinel high-temperature expansion coefficient not Matching forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
4th, crucible internal walls material is not easily to fall off during use, without fettling, significantly improves pot life, can also help In the quality for improving casting, preferably meet needed for metal casting production high-quality casting.
Specific embodiment
Embodiment 1：
The mass percent of each component is：Granularity 9-1mm white fused alumina particles：49%；1-0.1mm spinel particle：18%； ≤ 0.075mm spinelle fine powders：16%；Granularity≤0.005mm calcined alumina micro mists：6%；Granularity≤0.045mm electric smelting oxygen Change magnesium powder：2%；Granularity≤0.045mm chrome green powder：6%；Aluminous cement：3%；Water-reducing agent sodium tripolyphosphate：It is additional 0.08%；Water：Additional 4%.
The preparation process of pink fused alumina spinelle crucible includes the following steps：
(1) water-reducing agent and water are first weighed, is mixed until being completely dissolved, stand for standby use；Crucible die is brushed into demoulding Agent fixes, and is positioned on shake table, spare.
(2) corundum in granules is weighed, spinel particle is put into blender, 10~20min of mixing；Then it is thin to weigh spinelle Powder, calcined alumina micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(3) pre- mixed tripolyphosphate sodium water solution is poured into blender, continues 3~7min of stirring, after mixing Discharging；
(4) shake table is switched and opened, among mixed material is gradually poured into crucible die, treat that material full of mold, continues Until air is fully discharged in material, closing shake table switch stands maintenance for vibration.
(5) demoulded after standing maintenance 20 hours, crucible be put into drying chamber, temperature be adjusted to 40 DEG C, 70 DEG C, 110 DEG C, 160 DEG C 6h is dried respectively, the free water in crucible is made gradually to discharge；Dried crucible is put into kiln, is warming up to 2-3 DEG C/min 1520 DEG C of heat preservation 5h firings.Utilize Cr2O3With Al2O3Solid solution forms high-temperature expansion coefficient between pink fused alumina and magnesium aluminate spinel Mismatch forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
Embodiment 2：
The mass percent of each component is：Granularity 9-1mm plate diamond spar particles：36%；1-0.1mm spinel particle： 25%；≤ 0.075mm spinelle fine powders：12%；Granularity≤0.005mm calcined alumina micro mists：12%；Granularity≤0.045mm Electrically molten magnesia powder：4%；Granularity≤0.045mm chrome green powder：8%；Aluminous cement：3%；Water-reducing agent calgon： 0.15%；Water：6%.
The preparation process of pink fused alumina spinelle crucible includes the following steps：
(1) water-reducing agent and water are first weighed, is mixed until being completely dissolved, stand for standby use；Crucible die is brushed into demoulding Agent fixes, and is positioned on shake table, spare.
(2) corundum in granules is weighed, spinel particle is put into blender, 10~20min of mixing；Then it is thin to weigh spinelle Powder, calcined alumina micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(3) pre- mixed tripolyphosphate sodium water solution is poured into blender, continues 3~7min of stirring, after mixing Discharging；
(4) shake table is switched and opened, among mixed material is gradually poured into crucible die, treat that material full of mold, continues Until air is fully discharged in material, closing shake table switch stands maintenance for vibration.
(5) demoulded after standing maintenance 20 hours, crucible be put into drying chamber, temperature be adjusted to 40 DEG C, 70 DEG C, 110 DEG C, 160 DEG C 6h is dried respectively, the free water in crucible is made gradually to discharge；Dried crucible is put into kiln, is warming up to 2-3 DEG C/min 1520 DEG C of heat preservation 5h firings.Utilize Cr2O3With Al2O3Solid solution forms high-temperature expansion coefficient between pink fused alumina and magnesium aluminate spinel Mismatch forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
Embodiment 3：
The mass percent of each component is：Granularity 9-1mm plate diamond spar particles：42%；Granularity 1-0.1mm spinelles Grain：20%；Granularity≤0.075mm spinelle fine powders：10%；Granularity≤0.005mm calcined alumina micro mists：12%；Granularity≤ 0.045mm electrically molten magnesia powder：3%；Granularity≤0.045mm chrome green powder：12%；Aluminous cement：1%；Six inclined phosphorus of water-reducing agent Sour sodium：0.1%；Water：5%.
The preparation process of pink fused alumina spinelle crucible includes the following steps：
(1) water-reducing agent and water are first weighed, is mixed until being completely dissolved, stand for standby use；Crucible die is brushed into demoulding Agent fixes, and is positioned on shake table, spare.
(2) corundum in granules is weighed, spinel particle is put into blender, 10~20min of mixing；Then it is thin to weigh spinelle Powder, calcined alumina micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min； (3) pre- mixed tripolyphosphate sodium water solution is poured into blender, continues 3~7min of stirring, discharge after mixing；
(4) shake table is switched and opened, among mixed material is gradually poured into crucible die, treat that material full of mold, continues Until air is fully discharged in material, closing shake table switch stands maintenance for vibration.
(5) demoulded after standing maintenance 20 hours, crucible be put into drying chamber, temperature be adjusted to 40 DEG C, 70 DEG C, 110 DEG C, 160 DEG C 6h is dried respectively, the free water in crucible is made gradually to discharge；Dried crucible is put into kiln, is warming up to 2-3 DEG C/min 1520 DEG C of heat preservation 5h firings.Utilize Cr2O3With Al2O3Solid solution forms high-temperature expansion coefficient between pink fused alumina and magnesium aluminate spinel Mismatch forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
Embodiment 4：
The mass percent of each component is：Granularity 9-1mm plate diamond spar particles：42%；Granularity 1-0.1mm spinelles Grain：20%；Granularity≤0.075mm spinelle fine powders：10%；Granularity≤0.005mm calcined alumina micro mists：10%；Granularity≤ 0.045mm electrically molten magnesia powder：3%；Granularity≤0.045mm chrome green powder：12%；Aluminous cement：2%；Six inclined phosphorus of water-reducing agent Sour sodium：0.1%；Water：5%.
The preparation process of pink fused alumina spinelle crucible includes the following steps：
(1) water-reducing agent and water are first weighed, is mixed until being completely dissolved, stand for standby use；Crucible die is brushed into demoulding Agent fixes, and is positioned on shake table, spare.
(2) corundum in granules is weighed, spinel particle is put into blender, 10~20min of mixing；Then it is thin to weigh spinelle Powder, calcined alumina micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(3) pre- mixed tripolyphosphate sodium water solution is poured into blender, continues 3~7min of stirring, after mixing Discharging；
(4) shake table is switched and opened, among mixed material is gradually poured into crucible die, treat that material full of mold, continues Until air is fully discharged in material, closing shake table switch stands maintenance for vibration.
(5) demoulded after standing maintenance 20 hours, crucible be put into drying chamber, temperature be adjusted to 30 DEG C, 60 DEG C, 100 DEG C, 150 DEG C 7h is dried respectively, the free water in crucible is made gradually to discharge；Dried crucible is put into kiln, is warming up to 2-3 DEG C/min 1600 DEG C of heat preservation 4h firings.Utilize Cr2O3With Al2O3Solid solution forms high-temperature expansion coefficient between pink fused alumina and magnesium aluminate spinel Mismatch forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
Embodiment 5：
The mass percent of each component is：Granularity 9-1mm plate diamond spar particles：42%；Granularity 1-0.1mm spinelles Grain：20%；Granularity≤0.075mm spinelle fine powders：10%；Granularity≤0.005mm calcined alumina micro mists：10%；Granularity≤ 0.045mm electrically molten magnesia powder：3%；Granularity≤0.045mm chrome green powder：12%；Aluminous cement：2%；Six inclined phosphorus of water-reducing agent Sour sodium：0.1%；Water：5%.
The preparation process of pink fused alumina spinelle crucible includes the following steps：
(1) water-reducing agent and water are first weighed, is mixed until being completely dissolved, stand for standby use；Crucible die is brushed into demoulding Agent fixes, and is positioned on shake table, spare.
(2) corundum in granules is weighed, spinel particle is put into blender, 10~20min of mixing；Then it is thin to weigh spinelle Powder, calcined alumina micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(3) pre- mixed tripolyphosphate sodium water solution is poured into blender, continues 3~7min of stirring, after mixing Discharging；
(4) shake table is switched and opened, among mixed material is gradually poured into crucible die, treat that material full of mold, continues Until air is fully discharged in material, closing shake table switch stands maintenance for vibration.
(5) demoulded after standing maintenance 20 hours, crucible be put into drying chamber, temperature be adjusted to 50 DEG C, 80 DEG C, 120 DEG C, 170 DEG C 5h is dried respectively, the free water in crucible is made gradually to discharge；Dried crucible is put into kiln, is warming up to 2-3 DEG C/min 1400 DEG C of heat preservation 7h firings.Utilize Cr2O3With Al2O3Solid solution forms high-temperature expansion coefficient between pink fused alumina and magnesium aluminate spinel Mismatch forms micro-crack in crucible body, makes its toughening, significantly improves the thermal shock resistance of crucible.
The performance indicator of pink fused alumina spinelle crucible prepared by above-described embodiment 1-3 is as shown in the table：
Above-described embodiment is merely illustrative of the technical solution of the present invention and is not intended to limit it, all without departing from the present invention Any modification of spirit and scope or equivalent replacement should all cover the range in technical solution of the present invention.

Claims (7)

1. a kind of pink fused alumina spinelle crucible, which is characterized in that by mass percentage, mainly by the following raw material preparation Into：Corundum in granules 36-49%, spinel particle 18-25%, spinelle fine powder 10-16%, calcined alumina micro mist 6-12%, Electrically molten magnesia powder 2-4%, chrome green powder 6-12%, aluminous cement 1-3%, water-reducing agent 0.08-0.15%, water 4-6%.
2. a kind of pink fused alumina spinelle crucible according to claim 1, which is characterized in that the water-reducing agent is hexa metaphosphoric acid Sodium or sodium tripolyphosphate.
3. a kind of pink fused alumina spinelle crucible according to claim 1, which is characterized in that the corundum in granules is firm for plate Beautiful or white fused alumina.
4. a kind of pink fused alumina spinelle crucible according to claim 1, which is characterized in that the spinel particle and point are brilliant Stone fine powder is electric smelting spinelle or sintering spinelle.
5. according to the preparation method of any one of the claim 1-4 pink fused alumina spinelle crucibles, it is characterised in that including with Lower step：
(1) water-reducing agent is taken to be placed in water, stirring is to being completely dissolved, stand for standby use；
(2) it fixes, is positioned on shake table after releasing agent is brushed on crucible die, it is spare；
(3) corundum in granules, spinel particle are put into blender, mix 10~20min, then by spinelle fine powder, calcined oxide Aluminium micro mist, electrically molten magnesia powder, chrome green powder, aluminous cement are sequentially placed into blender, stir 10~20min；
(4) solution in step (1) is poured into blender, continues 3~7min of stirring, discharge after mixing；
(5) shake table is opened, the material in step (4) is poured slowly into crucible die, treats that material full of mold, continues vibration discharge Air closes shake table, stands；
(6) demoulded after conserving 18-24h, crucible be put into drying chamber, temperature be adjusted to 30-50 DEG C, 60-80 DEG C, 100-120 DEG C, 150-170 DEG C is dried 5-7h respectively；
(7) dried crucible is put into kiln, is warming up to 1400-1600 DEG C with 2-3 DEG C/min, heat preservation 4-7h firings.
6. the preparation method of pink fused alumina spinelle crucible according to claim 5, which is characterized in that conserved in step (6) It is demoulded after 20h, crucible is put into drying chamber, temperature is adjusted to 40 DEG C, 70 DEG C, 110 DEG C, 160 DEG C and dries 6h respectively.
7. the preparation method of pink fused alumina spinelle crucible according to claim 5, which is characterized in that in step (7), with 2- 3 DEG C/min is warming up to 1520 DEG C, heat preservation 5h firings.
CN201711453274.6A 2017-12-28 2017-12-28 A kind of pink fused alumina spinelle crucible and preparation method thereof Pending CN108164256A (en)

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Application publication date: 20180615