CN107311669A - A kind of periclase spinel refractory bricks and preparation method thereof - Google Patents

A kind of periclase spinel refractory bricks and preparation method thereof Download PDF

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CN107311669A
CN107311669A CN201710444708.XA CN201710444708A CN107311669A CN 107311669 A CN107311669 A CN 107311669A CN 201710444708 A CN201710444708 A CN 201710444708A CN 107311669 A CN107311669 A CN 107311669A
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magnesium
spinel
fine powder
refractory brick
preparation
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CN107311669B (en
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张寒
赵惠忠
李静捷
丁雄风
赵鹏达
陈建威
范润东
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Handan Yuyan Refractory Co.,Ltd.
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Wuhan University of Science and Engineering WUSE
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • C—CHEMISTRY; METALLURGY
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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
    • 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
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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
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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
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

The present invention relates to a kind of periclase spinel refractory bricks and preparation method thereof.Its technical scheme is：It is 1 ︰ (0.05 ~ 0.1) dispensing by the mass ratio of electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles, premix particulate material is made in mixing；By the mass ratio of highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders, for 1 ︰, ((premix fine powder material is made in 0.2 ~ 0.3) ︰ (0.01 ~ 0.04) dispensing, mixing to 0.15 ~ 0.2) ︰.Mass ratio by premix Ke Li Liao ︰ premix fine powder materials is 1 ︰ (0.35 ~ 0.4) dispensing, and compound is made in mixing；By the mass ratio of Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites, for 1 ︰, (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), Lauxite and lignosulfite are added into compound, and mixing seals ageing mixture, is molded, dries；Burnt till under the conditions of high pure nitrogen atmosphere and 1500 ~ 1550 DEG C, periclase spinel refractory bricks are made.The bulk density of the made product of the present invention is big, compressive resistance is high and resistance to slag corrosion is strong.

Description

A kind of square magnesium stone-spinel refractory brick and preparation method thereof
Technical field
The invention belongs to basic firebrick technical field.Specifically related to a kind of square magnesium stone-spinel refractory brick and its system Preparation Method.
Background technology
Square magnesium stone-spinel fire resistant materials be using periclase and spinelle as a class refractory material of principal crystalline phase, due to Periclase high temperature resistant, alkali resistance slag corrosion are strong, especially easily with other components（Such as Al2O3、Cr2O3And FeO etc.）Form point Spar, reduces the thermal coefficient of expansion of material, the volume stability of reinforcing material.
" a kind of Periclase-hercynite refractory material and preparation method thereof " (CN201010212182.0) patent skill Art, is mainly mixed with magnesia and hercynite-corundum composite material, shaping, is burnt till.Square magnesium prepared by the technology There is stone-hercynite refractory material higher kliner coating tack and refractoriness, good alkali resistant, sulphur, chlorine and clinker etc. to invade Erosion ability, has higher refractoriness under load, higher elevated temperature strength and preferable thermal shock resistance, but prepared side again Magnesite-hercynite refractory material is in sintering process, and oxidation decomposition, and then the side's of reducing magnesium easily occur for hercynite The middle low temperature intensity of stone-hercynite refractory material.
" a kind of Periclase-hercynite brick and preparation method thereof " (CN200710052403.0) patented technology, the skill Art utilizes the ductility and plasticity of iron, is burning till situ generation hercynite and spinelle solid solution containing hercynite Body, preparation technology is simple, saves the energy；Under briquetting pressure effect, by metal phase plasticity phase transformation, metal is formed in adobe With reference to, and then improve the bulk density and intensity of adobe.But the oxidation of the plasticity phase transformation of metal phase, especially metallic iron is easily made Micro-crack is formed into larger volumetric expansion, and then reduces the crystal boundary bond strength of Periclase-hercynite brick, the side of compromising The anti-scour property of magnesite-hercynite brick.
The content of the invention
It is contemplated that overcoming prior art defect, it is therefore an objective to provide that a kind of technique is simple and the small periclase-point of energy consumption The preparation method of spar refractory brick, the bulk density of the square magnesium stone-spinel refractory brick prepared with this method is big, resistance to pressure Degree is high and resistance to slag corrosion is strong.
To achieve the above object, the technical solution adopted by the present invention is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.05 ~ 0.1), by the electric-melting magnesium Zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made.
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio be 1 ︰ (0.15 ~ 0.2) ︰ (0.2 ~ 0.3) ︰ (0.01 ~ 0.04), by the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the yittrium oxide Fine powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made.
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.35 ~ 0.4), will be described pre- Mixed particulate material and the premix fine powder material are mixed 5 ~ 8 minutes, and compound is made.
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, mix 8 ~ 10 points Clock, the ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet.
5th step, the green billet added in mould, compressing under the conditions of 100 ~ 120MPa, the demoulding, 90 ~ 110 DEG C of conditions are dried 5 ~ 6 hours；Be subsequently placed in Muffle furnace, under the conditions of high pure nitrogen atmosphere and 1500 ~ 1550 DEG C be incubated 2 ~ 3 hours, square magnesium stone-spinel refractory brick is made.
The main chemical compositions of the electric-melting magnesium zircon sand particle are：Content of MgO is 93 ~ 95wt%, ZrO2Content be 3 ~ 5wt%；The granularity of the electric-melting magnesium zircon sand particle is 0.1 ~ 4mm.
The main chemical compositions of the magnesium aluminate spinel particle are：Content of MgO is 70 ~ 75wt%, Al2O3Content be 20 ~ 25wt%；The granularity of the magnesium aluminate spinel particle is 0.1 ~ 4mm.
Content of MgO >=98wt% of the highly-purity magnesite fine powder；Granularity≤80 μm of the highly-purity magnesite fine powder.
The main chemical compositions of the magnesium aluminate spinel fine powder are：Content of MgO is 25 ~ 30wt%, Al2O3Content be 65 ~ 70wt%；Granularity≤80 μm of the magnesium aluminate spinel fine powder.
The Y of the yittrium oxide fine powder2O3Content >=99wt%；Granularity≤80 μm of the yittrium oxide fine powder.
Al content >=98wt% of the aluminium powder；Granularity≤80 μm of the aluminium powder.
The Lauxite is pure for chemistry.
The lignosulfite is technical pure, lignosulfitepHIt is worth for 6.0 ~ 6.5.
The N of the high pure nitrogen2Content >=99.99wt%.
Due to taking above-mentioned technical proposal, the present invention has following good effect compared with prior art：
1st, the present invention is without special Preparation equipment and the treatment technology of complexity, and technique is simple, saves human resources, energy consumption It is small.
2nd, the present invention improves the uniformity of two groups of premix, had by being premixed respectively to two kinds of particles material and four kinds of powders Beneficial to the sintering character of lifting square magnesium stone-spinel refractory brick, and then increase the densification of square magnesium stone-spinel refractory brick Degree.
3rd, the present invention is combined using nitridation reaction formation ceramic phase in high-temperature sintering process, enhancing periclase and spinelle Crystal boundary bond strength, improves the compressive resistance of square magnesium stone-spinel refractory brick.
4th, the present invention utilizes rear-earth-doped solid solution reaction, reduces enrichment of the eutectic in crystal boundary, strengthens matrix and aggregate Solid-solid is combined, and lifts the anti-scour property of square magnesium stone-spinel refractory brick.
Square magnesium stone-spinel refractory brick prepared by the present invention is after measured：Bulk density is 2.98 ~ 3.03g/cm3；It is pressure-resistant Intensity is 70 ~ 75MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3 ~ 4%.
Therefore, the present invention has technique simple and the characteristics of small energy consumption；Prepared square magnesium stone-spinel refractory brick Bulk density is big, compressive resistance is high and resistance to slag corrosion is strong.
Embodiment
With reference to embodiment, the invention will be further described, not to the limitation of its protection domain.
In present embodiment：
The main chemical compositions of the electric-melting magnesium zircon sand particle are：Content of MgO is 93 ~ 95wt%, ZrO2Content is 3 ~ 5wt%；Institute The granularity for stating electric-melting magnesium zircon sand particle is 0.1 ~ 4mm.
The main chemical compositions of the magnesium aluminate spinel particle are：Content of MgO is 70 ~ 75wt%, Al2O3Content be 20 ~ 25wt%；The granularity of the magnesium aluminate spinel particle is 0.1 ~ 4mm.
Content of MgO >=98wt% of the highly-purity magnesite fine powder；Granularity≤80 μm of the highly-purity magnesite fine powder.
The main chemical compositions of the magnesium aluminate spinel fine powder are：Content of MgO is 25 ~ 30wt%, Al2O3Content be 65 ~ 70wt%；Granularity≤80 μm of the magnesium aluminate spinel fine powder.
The Y of the yittrium oxide fine powder2O3Content >=99wt%；Granularity≤80 μm of the yittrium oxide fine powder.
Al content >=98wt% of the aluminium powder；Granularity≤80 μm of the aluminium powder.
The Lauxite is pure for chemistry.
The lignosulfite is technical pure, lignosulfitepHIt is worth for 6.0 ~ 6.5.
The N of the high pure nitrogen2Content >=99.99wt%.
Repeated no more in embodiment.
Embodiment 1
A kind of square magnesium stone-spinel refractory brick and preparation method thereof.Preparation method described in the present embodiment is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.05 ~ 0.07), by the electric smelting Magnesium zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made.
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio be 1 ︰ (0.15 ~ 0.17) ︰ (0.2 ~ 0.24) ︰ (0.01 ~ 0.03), by the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the oxidation Yttrium fine powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made.
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.35 ~ 0.37), will be described Premix particulate material and the premix fine powder material is mixed 5 ~ 8 minutes, compound is made.
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, mix 8 ~ 10 points Clock, the ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet.
5th step, the green billet added in mould, compressing under the conditions of 100 ~ 120MPa, the demoulding, 90 ~ 110 DEG C of conditions are dried 5 ~ 6 hours；Be subsequently placed in Muffle furnace, under the conditions of high pure nitrogen atmosphere and 1500 ~ 1530 DEG C be incubated 2 ~ 3 hours, square magnesium stone-spinel refractory brick is made.
Square magnesium stone-spinel refractory brick manufactured in the present embodiment is after measured：Bulk density is 2.98 ~ 3.00g/cm3；It is resistance to Compressive Strength is 70 ~ 72MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3 ~ 3.4%.
Embodiment 2
A kind of square magnesium stone-spinel refractory brick and preparation method thereof.Preparation method described in the present embodiment is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.06 ~ 0.08), by the electric smelting Magnesium zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made.
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio be 1 ︰ (0.16 ~ 0.18) ︰ (0.22 ~ 0.26) ︰ (0.01 ~ 0.03), by the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the oxidation Yttrium fine powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made.
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.36 ~ 0.38), will be described Premix particulate material and the premix fine powder material is mixed 5 ~ 8 minutes, compound is made.
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, mix 8 ~ 10 points Clock, the ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet.
5th step, the green billet added in mould, compressing under the conditions of 100 ~ 120MPa, the demoulding, 90 ~ 110 DEG C of conditions are dried 5 ~ 6 hours；Be subsequently placed in Muffle furnace, under the conditions of high pure nitrogen atmosphere and 1500 ~ 1530 DEG C be incubated 2 ~ 3 hours, square magnesium stone-spinel refractory brick is made.
Square magnesium stone-spinel refractory brick manufactured in the present embodiment is after measured：Bulk density is 2.99 ~ 3.01g/cm3；It is resistance to Compressive Strength is 71 ~ 73MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3.2 ~ 3.6%.
Embodiment 3
A kind of square magnesium stone-spinel refractory brick and preparation method thereof.Preparation method described in the present embodiment is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.07 ~ 0.09), by the electric smelting Magnesium zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made.
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio be 1 ︰ (0.17 ~ 0.19) ︰ (0.24 ~ 0.28) ︰ (0.02 ~ 0.04), by the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the oxidation Yttrium fine powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made.
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.37 ~ 0.39), will be described Premix particulate material and the premix fine powder material is mixed 5 ~ 8 minutes, compound is made.
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, mix 8 ~ 10 points Clock, the ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet.
5th step, the green billet added in mould, compressing under the conditions of 100 ~ 120MPa, the demoulding, 90 ~ 110 DEG C of conditions are dried 5 ~ 6 hours；Be subsequently placed in Muffle furnace, under the conditions of high pure nitrogen atmosphere and 1520 ~ 1550 DEG C be incubated 2 ~ 3 hours, square magnesium stone-spinel refractory brick is made.
Square magnesium stone-spinel refractory brick manufactured in the present embodiment is after measured：Bulk density is 3.00 ~ 3.02g/cm3；It is resistance to Compressive Strength is 72 ~ 74MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3.4 ~ 3.8%.
Embodiment 4
A kind of square magnesium stone-spinel refractory brick and preparation method thereof.Preparation method described in the present embodiment is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.08 ~ 0.1), by the electric-melting magnesium Zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made.
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio be 1 ︰ (0.18 ~ 0.2) ︰ (0.26 ~ 0.3) ︰ (0.02 ~ 0.04), by the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the yittrium oxide Fine powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made.
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.38 ~ 0.4), will be described pre- Mixed particulate material and the premix fine powder material are mixed 5 ~ 8 minutes, and compound is made.
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, mix 8 ~ 10 points Clock, the ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet.
5th step, the green billet added in mould, compressing under the conditions of 100 ~ 120MPa, the demoulding, 90 ~ 110 DEG C of conditions are dried 5 ~ 6 hours；Be subsequently placed in Muffle furnace, under the conditions of high pure nitrogen atmosphere and 1520 ~ 1550 DEG C be incubated 2 ~ 3 hours, square magnesium stone-spinel refractory brick is made.
Square magnesium stone-spinel refractory brick manufactured in the present embodiment is after measured：Bulk density is 3.01 ~ 3.03g/cm3；It is resistance to Compressive Strength is 73 ~ 75MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3.6 ~ 4%.
Present embodiment has following good effect compared with prior art：
1st, present embodiment is without special Preparation equipment and the treatment technology of complexity, and technique is simple, saves labour's money Source, energy consumption is small.
2nd, present embodiment is by premixing respectively to two kinds of particles material and four kinds of powders, improves the equal of two groups of premixes Even property, is conducive to being lifted the sintering character of square magnesium stone-spinel refractory brick, and then increases square magnesium stone-spinel refractory brick Densification degree.
3rd, present embodiment utilize high-temperature sintering process in nitridation reaction formation ceramic phase combine, enhancing periclase with The crystal boundary bond strength of spinelle, improves the compressive resistance of square magnesium stone-spinel refractory brick.
4th, present embodiment utilizes rear-earth-doped solid solution reaction, reduces enrichment of the eutectic in crystal boundary, strengthens matrix Combined with the solid-solid of aggregate, lift the anti-scour property of square magnesium stone-spinel refractory brick.
Square magnesium stone-spinel refractory brick prepared by present embodiment is after measured：Bulk density is 2.98 ~ 3.03g/ cm3；Compressive resistance is 70 ~ 75MPa；1500 DEG C × 3h Static crucible methods anti-slag experiment erosion index is 3 ~ 4%.
Therefore, present embodiment has technique simple and the characteristics of energy consumption is small；Prepared square magnesium stone-spinel matter The bulk density of refractory brick is big, compressive resistance is high and resistance to slag corrosion is strong.

Claims (11)

1. a kind of preparation method of square magnesium stone-spinel refractory brick, it is characterised in that the preparation method is comprised the concrete steps that：
The first step, by electric-melting magnesium zircon sand Ke Li ︰ magnesium aluminate spinel particles mass ratio be 1 ︰ (0.05 ~ 0.1), by the electric-melting magnesium Zircon sand particle and the magnesium aluminate spinel particle are mixed 3 ~ 5 minutes, and premix particulate material is made；
Second step, by highly-purity magnesite Xi Fen ︰ magnesium aluminate spinel Xi Fen ︰ yittrium oxide Xi Fen ︰ aluminium powders mass ratio for 1 ︰ (0.15 ~ 0.2) ︰ (0.2 ~ 0.3) ︰ (0.01 ~ 0.04), the highly-purity magnesite fine powder, the magnesium aluminate spinel fine powder, the yittrium oxide is thin Powder and the aluminium powder are mixed 8 ~ 10 minutes, and premix fine powder material is made；
3rd step, the mass ratio of premix fine powder material as described in the premix Ke Li Liao ︰ are 1 ︰ (0.35 ~ 0.4), by the premix Pellet and the premix fine powder material are mixed 5 ~ 8 minutes, and compound is made；
4th step, by the Hun He Liao ︰ Niao aldehyde Shu Zhi ︰ lignosulfites mass ratio be 1 ︰ (0.06 ~ 0.07) ︰ (0.02 ~ 0.03), the Lauxite and the lignosulfite are sequentially added into the compound, is mixed 8 ~ 10 minutes, Ageing mixture 3 ~ 5 hours under 25 ~ 30 DEG C and air-proof condition, is made green billet；
5th step, by the green billet add mould in, it is compressing under the conditions of 100 ~ 120MPa, the demoulding, at 90 ~ 110 DEG C Condition is dried 5 ~ 6 hours；It is subsequently placed in Muffle furnace, 2 ~ 3 is incubated under the conditions of high pure nitrogen atmosphere and 1500 ~ 1550 DEG C small When, square magnesium stone-spinel refractory brick is made.
2. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the electric-melting magnesium The main chemical compositions of zircon sand particle are：Content of MgO is 93 ~ 95wt%, ZrO2Content is 3 ~ 5wt%；The electric-melting magnesium zircon sand The granularity of grain is 0.1 ~ 4mm.
3. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the magnalium point The main chemical compositions of spar particle are：Content of MgO is 70 ~ 75wt%, Al2O3Content is 20 ~ 25wt%；The magnesium aluminate spinel The granularity of particle is 0.1 ~ 4mm.
4. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the high purity magnesium Content of MgO >=98wt% of sand fine powder；Granularity≤80 μm of the highly-purity magnesite fine powder.
5. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the magnalium point The main chemical compositions of spar fine powder are：Content of MgO is 25 ~ 30wt%, Al2O3Content is 65 ~ 70wt%；The magnesium aluminate spinel Granularity≤80 μm of fine powder.
6. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the yittrium oxide The Y of fine powder2O3Content >=99wt%；Granularity≤80 μm of the yittrium oxide fine powder.
7. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the aluminium powder Al content >=98wt%；Granularity≤80 μm of the aluminium powder.
8. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the ureaformaldehyde tree Fat is pure for chemistry.
9. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that the sulfurous acid Spent pulping liquor is technical pure, lignosulfitepHIt is worth for 6.0 ~ 6.5.
10. the preparation method of square magnesium stone-spinel refractory brick according to claim 1, it is characterised in that described high-purity The N of nitrogen2Content >=99.99wt%.
11. a kind of square magnesium stone-spinel refractory brick, it is characterised in that the square magnesium stone-spinel refractory brick is according to power Profit requires that periclase-point prepared by the preparation method of the square magnesium stone-spinel refractory brick any one of 1 ~ 10 is brilliant Stone refractory brick.
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