CN107540351A - A kind of high-purity composite of seawater magnesia magnesium aluminate spinel zirconium oxide - Google Patents
A kind of high-purity composite of seawater magnesia magnesium aluminate spinel zirconium oxide Download PDFInfo
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- CN107540351A CN107540351A CN201710749039.7A CN201710749039A CN107540351A CN 107540351 A CN107540351 A CN 107540351A CN 201710749039 A CN201710749039 A CN 201710749039A CN 107540351 A CN107540351 A CN 107540351A
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Abstract
The invention provides a kind of high-purity composite of seawater magnesia magnesium aluminate spinel zirconium oxide, belong to fire resisting material field, it is low impurity content can be obtained, elevated temperature strength is high, erosion-resisting characteristics is good, refractoriness under load is high, the composite of good thermal shock stability, can be widely used for cement rotary kiln, lime sleeve kiln, lime Maers Kiln, glass furnace, RH refining furnaces and non-ferrous metal smelting furnace etc..The invention mainly comprises：A kind of seawater magnesia magnesium aluminate spinel zirconium oxide composite material, seawater magnesia, 1 20% magnesium aluminate spinel, 1 10% zirconium oxide of each content of material count by weight percentage for 80 98%, additional 1 5% lignosulfite.
Description
Technical field
The invention belongs to fire resisting material field, more particularly to a kind of seawater magnesia-magnesia alumina spinel-zirconia are high-purity compound
Material.
Background technology
Magnesia fusing point is up to 2830 DEG C, has extremely fireproof performance, and magnesia also has certain corrosion resistance
Can, therefore it is used as refractory material, it is widely used in the industries such as steel, cement, nonferrous smelting and glass.
The main source of magnesia is reheating magnesia, caustic-calcined magnesite, fused magnesite and seawater magnesia.Past more than 20 years
Come, China has also exported a large amount of magnesite, reheating magnesia, caustic-calcined magnesite and electric-melting magnesium while domestic production needs are met
Sand, largely meet needs of the world industry developed country industrial development to magnesia.Over the past two years due to China
Energy resources are in short supply and the problem of environmental pollution is serious, start to limit high energy consumption high pollution production and outlet, counterweight
The production for burning magnesia, caustic-calcined magnesite and fused magnesite performs strict control.
Seawater magnesia has advantages below compared with other kinds of magnesia：（1）Seawater and bittern are a kind of regenerated resources,
And magnesite is non-renewable resource；（2）Seawater magnesia purity is high, can obtain ultra-pure magnesium that content of MgO is more than 99%
Sand, and natural magnesia reaches 98% just relatively difficult, and the service life of refractory material is further improved, development is high-purity（Oxidation
Content of magnesium is more than 98%）With ultrapure magnesia（Content of magnesia is more than 99%）And one important developing direction of refractory material.
（3）The chemical composition of seawater is uniform, can be adjusted according to the requirement of refractory material, and the chemical composition in magnesite
It is uneven.So either from Resources Strategy and the angle of environmental protection, or the performance from raising refractory material
Angle for, seawater magnesia all has very big advantage, just particularly must on application study of the seawater magnesia in refractory material
Will.But seawater magnesia is carbide refractory, be not suitable for the smelting of high-quality steel, and magnesium aluminate spinel be it is a kind of be applied to it is excellent
The refractory material of matter steel smelting, but simple magnesium aluminate spinel has the shortcomings that high temperature break resistant intensity is low, thermal shock resistance is poor, no
The use in key positions such as RH refining furnaces, glass furnace, lime sleeve kiln and Maers Kilns can be fully met.
The content of the invention
The invention provides a kind of high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia, the composite impurity
Content is low, and elevated temperature strength is high, and erosion-resisting characteristics is good, and refractoriness under load is high, good thermal shock stability, can be widely used for cement revolution
Kiln, lime sleeve kiln, lime Maers Kiln, glass furnace, RH refining furnaces and non-ferrous metal smelting furnace etc..
In order to reach object above, the present invention adopts the following technical scheme that：
A kind of high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia, each content of material are count by weight percentage
80-98% seawater magnesia, 1-20% magnesium aluminate spinel, 1-10% zirconium oxide, additional 1-5% lignosulfite.
Composite sulfite spent pulping liquor described above is bonding agent, and the seawater magnesia has 3-1mm, 1-0mm, small
In tri- kinds of granularities of 0.088mm, the granularity of the magnesium aluminate spinel is 3-0mm, and the granularity of the zirconium oxide is 1-0mm, the magnesium
Aluminate, which includes sintering magnesium aluminate spinel and electric melting magnesium aluminum spinel, the zirconium oxide, includes desilicated zirconia and monocline zirconium.It is described
The varigrained ratio of composite is：
1≤granularity≤3mm 44-65%
0≤granularity≤1mm 18-30%
0≤granularity≤0.088mm 17-30%.
The preparation method of the above-mentioned high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia is：Weighed by proportioning various
Raw material, it is well mixed, obtains pug through being kneaded, be then press-formed, 5-25h is dried at 80 DEG C -200 DEG C, in 1500-1800
DEG C tunnel cave high temperature is burnt till.
Beneficial effects of the present invention are：The invention provides a kind of seawater magnesia-magnesia alumina spinel-zirconia is high-purity compound
Material, the main chemical compositions of product of the present invention are stable oxide, and are carbon less and silicon less product, disclosure satisfy that high-quality steel
Smelting；And the elevated temperature strength of product of the present invention is high, wearability is good, refractoriness under load is high, cement revolution can apply to
Kiln, lime sleeve kiln, lime Maers Kiln, glass furnace, RH refining furnaces and non-ferrous metal smelting furnace etc..The present invention uses sea water magnesia
Sand is primary raw material, and its purity is high, density is high and grain crystalline is big, and seawater magnesia does not have wedge angle, eliminates stress concentration,
Crackle tendency substantially reduces, and is advantageous to improve the thermal shock resistance of material；Phase transformation Zeng Ren under the high temperature conditions be present in zirconium oxide, and
And angle of wetting of the zirconium oxide in molten slag is small so that material has excellent corrosion resistance and thermal shock resistance；And magnesium
The content of aluminate, monocline zirconium or desilicated zirconia is very low, can prepare a kind of high-purity composite, the property of the composite
Can index be apparent porosity 10-17%, bulk density 3.0-3.4g/cm3, the anti-folding of cold crushing strength 60-120MPa, high temperature it is strong
Spend 5-10Mpa, refractoriness under load is more than 1700 DEG C, thermal shock resistance 15-30 time, have refractoriness under load height, high temperature strong
The excellent performance indications such as degree is high and wearability is good, corrosion resistance is good.Product of the present invention also successfully substitutes day with seawater magnesia
Right magnesia produces high-grade refractory material, and realizes Trend of Chrome-free production, and environmentally friendly, market potential is big, is suitable for promoting
Using by with good economic and social benefit.
Embodiment
Embodiment 1
A kind of preparation method of the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia, by weight percentage, raw material
Form and be：80% seawater magnesia, 17% electric melting magnesium aluminum spinel, 3% desilicated zirconia, additional 3% spent pulping liquor is bonding agent.
During production, various raw materials first are weighed by proportioning, are well mixed, obtain pug through being kneaded, then rubbed forcing press
It is compressing, 5-25h is dried at 80 DEG C -200 DEG C, is burnt till in 1500-1800 DEG C of tunnel cave high temperature.
The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-1mm, 1-0mm sea water magnesia
Sand, electric melting magnesium aluminum spinel and desilicated zirconia.
The performance indications of products obtained therefrom are：Apparent porosity 15.2%, bulk density 3.20g/cm3, cold crushing strength
90MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）23 times, high temperature break resistant intensity 7.6MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 2
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：80% seawater magnesia, 15% electric melting magnesium aluminum spinel, 5% desilicated zirconia, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, electric melting magnesium aluminum spinel and desilicated zirconia.
The performance indications of products obtained therefrom are：Apparent porosity 14.8%, bulk density 3.25g/cm3, cold crushing strength
105MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）26 times, high temperature break resistant intensity 8.6MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 3
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：85% seawater magnesia, 12% electric melting magnesium aluminum spinel, 3% desilicated zirconia, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, electric melting magnesium aluminum spinel and desilicated zirconia.
The performance indications of products obtained therefrom are：Apparent porosity 15.8%, bulk density 3.15g/cm3, cold crushing strength
95MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）22 times, high temperature break resistant intensity 7.1MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 4
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：85% seawater magnesia, 12% sintering magnesium aluminate spinel, 3% monocline zirconium, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, sintering magnesium aluminate spinel and monocline zirconium.
The performance indications of products obtained therefrom are：Apparent porosity 13.8%, bulk density 3.32g/cm3, cold crushing strength
106MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）25 times, high temperature break resistant intensity 7.5MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 5
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：80% seawater magnesia, 16% sintering magnesium aluminate spinel, 4% monocline zirconium, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, sintering magnesium aluminate spinel and monocline zirconium.
The performance indications of products obtained therefrom are：Apparent porosity 14.6%, bulk density 3.26g/cm3, cold crushing strength
99MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）24 times, high temperature break resistant intensity 8.3MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 6
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：84% seawater magnesia, 10% sintering magnesium aluminate spinel, 6% monocline zirconium, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, sintering magnesium aluminate spinel and monocline zirconium.
The performance indications of products obtained therefrom are：Apparent porosity 15.2%, bulk density 3.25g/cm3, cold crushing strength
88MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）20 times, high temperature break resistant intensity 7.8MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 7
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：85% seawater magnesia, 11% electric melting magnesium aluminum spinel, 4% monocline zirconium, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, electric melting magnesium aluminum spinel and monocline zirconium.
The performance indications of products obtained therefrom are：Apparent porosity 14.8%, bulk density 3.29g/cm3, cold crushing strength
83MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）20 times, high temperature break resistant intensity 6.8MPa,
Its corrosion resistance and wearability are preferable.
Embodiment 8
Production technology and embodiment 1 are identical, and difference is：
By weight percentage, raw material composition is：84% seawater magnesia, 12% sintering magnesium aluminate spinel, 4% desilicated zirconia, outside
The spent pulping liquor for adding 3% is bonding agent.The powder is the seawater magnesia that granularity is less than 0.088mm, and the aggregate size is 3-
1mm, 1-0mm seawater magnesia, sintering magnesium aluminate spinel and desilicated zirconia.
The performance indications of products obtained therefrom are：Apparent porosity 15.5%, bulk density 3.22g/cm3, cold crushing strength
86MPa, refractoriness under load are more than 1700 DEG C, thermal shock resistance（1100 DEG C, water cooling）24 times, high temperature break resistant intensity 7.2MPa,
Its corrosion resistance and wearability are preferable.
Described above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications should also regard
For protection scope of the present invention.
Claims (6)
1. a kind of high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia, it is characterised in that the composite is with sea
Water magnesia, magnesium aluminate spinel, zirconium oxide are raw material, and lignosulfite is made for bonding agent, each raw materials by weight
Composition is calculated as 80-98% seawater magnesia, 1-20% magnesium aluminate spinel, 1-10% zirconium oxide, additional 1-5% sulfite paper
Pulp waste.
2. the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia according to claim 1, it is characterised in that institute
Stating seawater magnesia has 3-1mm, 1-0mm, less than tri- kinds of granularities of 0.088mmm.
3. the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia according to claim 1, it is characterised in that institute
The granularity for stating magnesium aluminate spinel is 3-0mm, and the magnesium aluminate spinel is sintering magnesium aluminate spinel and electric melting magnesium aluminum spinel.
4. the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia according to claim 1, it is characterised in that institute
The granularity for stating zirconium oxide is 1-0mm, and the zirconium oxide is desilicated zirconia and monocline zirconium.
5. the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia according to claim 1, it is characterised in that institute
Stating the varigrained ratio of composite is：
1≤granularity≤3mm 44-65%
0≤granularity≤1mm 18-30%
0≤granularity≤0.088mm 17-30%.
6. the high-purity composite of seawater magnesia-magnesia alumina spinel-zirconia according to claim 1, it is characterised in that institute
The preparation method for stating composite is：Various raw materials are weighed by proportioning, are well mixed, pug is obtained through being kneaded, then pressurizes into
Type, 5-25h is dried at 80 DEG C -200 DEG C, is burnt till in 1500-1800 DEG C of tunnel cave high temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369156A (en) * | 2018-10-29 | 2019-02-22 | 武汉科技大学 | A kind of magnesia aggregate and preparation method thereof based on salt lake bittern |
| CN113929438A (en) * | 2021-10-22 | 2022-01-14 | 河南瑞泰耐火材料科技有限公司 | Preparation method of refractory material for cement kiln burning zone |
| CN114292094A (en) * | 2021-12-28 | 2022-04-08 | 郑州荣盛窑炉耐火材料有限公司 | Acid-corrosion-resistant long-life refractory brick for Osmant furnace and preparation method thereof |
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| CN109369156A (en) * | 2018-10-29 | 2019-02-22 | 武汉科技大学 | A kind of magnesia aggregate and preparation method thereof based on salt lake bittern |
| CN109369156B (en) * | 2018-10-29 | 2021-07-06 | 武汉科技大学 | Magnesia aggregate based on salt lake brine and preparation method thereof |
| CN113929438A (en) * | 2021-10-22 | 2022-01-14 | 河南瑞泰耐火材料科技有限公司 | Preparation method of refractory material for cement kiln burning zone |
| CN114292094A (en) * | 2021-12-28 | 2022-04-08 | 郑州荣盛窑炉耐火材料有限公司 | Acid-corrosion-resistant long-life refractory brick for Osmant furnace and preparation method thereof |
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Application publication date: 20180105 |