CN102295460A - Making method of high-strength alumina magnesia spinel pouring material for ladles - Google Patents
Making method of high-strength alumina magnesia spinel pouring material for ladles Download PDFInfo
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- CN102295460A CN102295460A CN2010102101136A CN201010210113A CN102295460A CN 102295460 A CN102295460 A CN 102295460A CN 2010102101136 A CN2010102101136 A CN 2010102101136A CN 201010210113 A CN201010210113 A CN 201010210113A CN 102295460 A CN102295460 A CN 102295460A
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Abstract
The invention discloses a making method of a high-strength alumina magnesia spinel pouring material for ladles, and belongs to the technical field of refractory materials. The pouring material is characterized by being prepared from the following raw materials in percentage by weight: 40 to 70 percent of white corundum granules with diameters of 8 to 0.088 millimeter, 7 to 20 percent of white corundum powder with granularity of 150 to 325 meshes, 10 to 30 percent of alumina magnesia spinel powder with granularity of 150 to 325 meshes, 2 to 15 percent of alumina micro powder, 2 to 8 percent of pure calcium aluminate cement, 0.01 to 1 percent of sodium hexametaphosphate and sodium lignin sulfonate, and 3 to 8 percent of water. The refractoriness under load of the pouring material is more than 1,500 DEG C, the pouring material has high breaking strength, the corundum alumina magnesia spinel pouring material which has high compression strength and is easy in construction overcomes the defects of poor erosion resistance and anti-stripping property of the traditional corundum refractory pouring material, and simultaneously, the high temperature strength of the pouring material is improved.
Description
Technical field
The present invention relates to a kind of ladle with aluminum-spinel mould material method for making, belong to technical field of refractory materials.
Background technology
Along with the development of ladle technology, very big requirement has been arranged for the life cycle of ladle.Phase at the beginning of the eighties in last century, China has developed water glass bonded magnalium matter mould material on the basis of ramming mass.The middle and later periods eighties, on the basis of alumina-magnesia castable, developed alumina one spinel pouring material again, making has had further raising in work-ing life of the performance of material and ladle.The middle and later periods nineties, along with the appearance of low cement and ultra-low cement deposit material, China refractory materials scientific worker bases oneself upon the raw material resources of China, in having developed, low-grade cement Refractory Carstables for Ladles.But these unshape refractories exist solidity to corrosion and slag penetration resistance is poor, and the low shortcoming of thermal shock resistance.
The aluminate mould material has good solidity to corrosion and anti-structure spalling as lining material in the ladle.But, use in the atmosphere for a long time and use at the high temperature more than 1600 ℃, near the working face because the infiltration of slag and oversintering etc. and vitrifying still can not obtain sufficient wearing quality.In order to improve the performance of aluminate mould material, in batching, add magnesium oxide powder, the weave construction by original position generation spinel strongthener under the high temperature can suppress the slag infiltration effectively, improves its slag resistance, prolongs the work-ing life of ladle.Because MgO and Al2O3 produce reaction and form spinel, alumina-magnesia castable becomes fine and close and has fine structure, thereby shows better wearing quality at molten steel impact zone alumina-magnesia castable than aluminate mould material.
The exploitation of aluminate mould material is based on the research to high alumina and magnesia two basic mould material, and purpose is to improve the solidity to corrosion and the slag penetration resistance of high alumina castable, and the slag penetration resistance and the thermal shock resistance that improve magnesia mould material.The swelling property and the structural stability of alumina-spinelle mould material are fabulous, are widely used in sidewall, bottom and the impact zone of ladle.The refractory materials worker has studied high aluminum raw material, spinel, magnesia, wedding agent, additive to aluminate matter mould material Effect on Performance both at home and abroad, has developed the aluminate mould material that premium properties is arranged at aspects such as resistance to fouling, slag penetration resistance, antistrippings.
In the present invention, adopt ultra-low cement bonded corundum-spinel mould material, be characterized in having good antistripping and alkali-resistivity ladle slag aggressiveness, the ladle lining life-span is significantly improved, consume obviously decline, and do not pollute molten steel.Add certain spinel on the basis of corundum pouring material, alkali-resistivity scouring performance improves greatly.And, the good resistance to fouling that magnalium matter mould material shows at ladle system, high-grade alumina-magnesia castable is not only being used more and more widely on ladle, and is applied to fields such as electric furnace lid, RH soaking tub, brick cup and gas permeable brick.
Summary of the invention
The objective of the invention is to prepare a kind of refractoriness under load greater than 1500 ℃, the folding strength height, the corundum matter aluminum-spinel refractory castable that is easy to construct that compressive strength is big, solve the erosion resistance of traditional corundum fireproof mould material and the shortcoming of antistripping difference, improve the hot strength of mould material simultaneously.
Purpose of the present invention has following technical solution to implement:
A kind of ladle method for making of high-strength aluminium-magnesium spinel pouring material, its basic step is: at first carry out the starting material apolegamy, the employing white fused alumina is an aggregate, with white alundum powder, aluminum-spinel and activated alumina is matrix, the employing pure calcium aluminate cement is a wedding agent, adopting six meta-acid sodium and sodium lignosulfonate is composite water-reducing agent
Described mould material is made by following raw materials by weight percent:
The white fused alumina particle, particle diameter 8-0.088mm 40-70%
The white fused alumina fine powder, granularity 150-325 order 7-20%
Thin part of aluminum-spinel, granularity 150-325 order 10-30%
Alumina powder 2-15%
Pure calcium aluminate cement 2-8%
Six meta-acid sodium and sodium lignosulfonate 0.01-1%
Water 3-8%.
After raw material was selected, its technology was as follows:
The test block of corundum matter aluminum-spinel refractory castable being made 40mm * 40mm * 160mm experimentizes.Experimentation accurately takes by weighing various aggregates and fine powder with electronic balance, wedding agent, water reducer mixes in a container earlier, adds water with stirrer then and stirs, initial amount of water is from 100ml, if amount of water is few, add 10ml more at every turn, be evenly distributed until aggregate, fine powder and various admixture, play slurry, stir into bulk.After treating that material stirs, pour them into 40mm * 40mm * 160mm three gang moulds as early as possible, vibrate on shaking table, play slurry until the surface, air entrapment is discharged from, and macrobead is evenly distributed, and needs to reach optimum regime about vibration 6min.(annotate:, use in first three gang mould and should be coated with one deck lubricating oil in order to be beneficial to the demoulding.) after vibration finishes, require test block surface to play slurry, the maintenance rear surface is bright and clean.After the vibratory compaction, natural curing is one day at ambient temperature, the demoulding then, in convection oven, dried one day under 110 ℃ of constant temperatures, wherein one is used for surveying the anti-folding of its normal temperature, ultimate compression strength, and another piece heated in High Temperature Furnaces Heating Apparatus 3 hours to 1500 ℃, was incubated 2 hours, take out after making it be cooled to room temperature naturally, survey its anti-folding and compressive strength and other performances.
The invention has the advantages that: adopt ultra-low cement bonded corundum-spinel mould material, have the good high-temperature performance, and good antistripping and alkali-resistivity ladle slag aggressiveness, the ladle lining life-span is significantly improved, consume obviously decline, and do not pollute molten steel.
Embodiment
Embodiment 1: at first carry out the starting material apolegamy, adopt the high grade bauxite aggregate, with calcined bauxite in powder, silicon powder, aluminate cement are that matrix is formed, and add tripoly phosphate sodium STPP as water reducer, its raw materials by weight preparation:
White fused alumina particle 8-0.088mm 50%
White fused alumina fine powder 150-325 order 15%
Thin part of 150-325 order 15% of aluminum-spinel
Alumina powder 15%
Pure calcium aluminate cement 5%
Six meta-acid sodium and sodium lignosulfonate 0.3%
Water 5%
After raw material is selected, carry out moulding by the technology in the summary of the invention, sintering and detection, detected result such as subordinate list.
Embodiment 2
At first carry out the starting material apolegamy, adopt the high grade bauxite aggregate, with calcined bauxite in powder, silicon powder, aluminate cement are that matrix is formed, and add tripoly phosphate sodium STPP as water reducer, its raw materials by weight preparation:
White fused alumina particle 8-0.088mm 50%
White fused alumina fine powder 150-325 order 15%
Thin part of 150-325 order 20% of aluminum-spinel
Alumina powder 10%
Pure calcium aluminate cement 5%
Six meta-acid sodium and sodium lignosulfonate 0.3%
Water 5%
After raw material is selected, carry out moulding by the technology in the summary of the invention, sintering and detection, detected result such as subordinate list.
Embodiment 3
At first carry out the starting material apolegamy, adopt the high grade bauxite aggregate, with calcined bauxite in powder, silicon powder, aluminate cement are that matrix is formed, and add tripoly phosphate sodium STPP as water reducer, its raw materials by weight preparation:
White fused alumina particle 8-0.088mm 50%
White fused alumina fine powder 150-325 order 10%
Thin part of 150-325 order 25% of aluminum-spinel
Alumina powder 10%
Pure calcium aluminate cement 5%
Six meta-acid sodium and sodium lignosulfonate 0.3%
Water 5%
After raw material is selected, carry out moulding by the technology in the summary of the invention, sintering and detection, detected result such as subordinate list.
Subordinate list:
Claims (1)
1. a ladle is characterized in that described mould material is made by following raw materials by weight percent with the method for making of high-strength aluminium-magnesium spinel pouring material:
The white fused alumina particle, particle diameter 8-0.088mm 40-70%
The white fused alumina fine powder, granularity 150-325 order 7-20%
Thin part of aluminum-spinel, granularity 150-325 order 10-30%
Alumina powder 2-15%
Pure calcium aluminate cement 2-8%
Six meta-acid sodium and sodium lignosulfonate 0.01-1%
Water 3-8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102101136A CN102295460A (en) | 2010-06-28 | 2010-06-28 | Making method of high-strength alumina magnesia spinel pouring material for ladles |
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| CN2010102101136A CN102295460A (en) | 2010-06-28 | 2010-06-28 | Making method of high-strength alumina magnesia spinel pouring material for ladles |
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| CN102295460A true CN102295460A (en) | 2011-12-28 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815951A (en) * | 2012-07-27 | 2012-12-12 | 中国铝业股份有限公司 | Flame-resistant corrosion-resistant coating |
| CN103602786A (en) * | 2013-11-19 | 2014-02-26 | 河南海格尔高温材料有限公司 | Preparation method of slit air brick |
| CN103964879A (en) * | 2014-05-29 | 2014-08-06 | 张婷 | Gunning mix for medium-sized steel ladle |
| CN103979986A (en) * | 2014-05-16 | 2014-08-13 | 上海宝明耐火材料有限公司 | Castable for ladle working layer |
| CN104130002A (en) * | 2014-07-30 | 2014-11-05 | 长兴攀江冶金材料有限公司 | Magnesium spinel ladle direct current castable |
| CN106631052A (en) * | 2016-09-26 | 2017-05-10 | 北京利尔高温材料股份有限公司 | Micropowder castable for working layer of ladle bottom impact zone |
| WO2018126937A1 (en) * | 2017-01-09 | 2018-07-12 | 武汉科技大学 | Dispersion-type corundum-spinel air-permeable brick and preparation method therefor |
| CN108383534A (en) * | 2018-03-09 | 2018-08-10 | 上海宝钢工业技术服务有限公司 | A kind of pouring materialfor steel ladle and application method of graphene-containing |
| CN109354485A (en) * | 2018-11-09 | 2019-02-19 | 洛阳索莱特材料科技有限公司 | A kind of fixed structure of ceramic nozzle and the preparation method of ceramic nozzle |
| CN109896846A (en) * | 2019-03-29 | 2019-06-18 | 襄阳聚力新材料科技有限公司 | A kind of intermediate frequency furnace BOTTOM ARGON BLOWING air brick and preparation method thereof |
| CN110698210A (en) * | 2019-10-08 | 2020-01-17 | 上海新泰山高温工程材料有限公司 | Ladle bottom castable with long service life and low cost and preparation method thereof |
| CN114956796A (en) * | 2022-05-27 | 2022-08-30 | 襄阳聚力新材料科技有限公司 | Presynthesized aluminum-magnesium spinel refractory castable for cored furnace |
-
2010
- 2010-06-28 CN CN2010102101136A patent/CN102295460A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815951A (en) * | 2012-07-27 | 2012-12-12 | 中国铝业股份有限公司 | Flame-resistant corrosion-resistant coating |
| CN103602786A (en) * | 2013-11-19 | 2014-02-26 | 河南海格尔高温材料有限公司 | Preparation method of slit air brick |
| CN103602786B (en) * | 2013-11-19 | 2015-10-28 | 河南海格尔高温材料有限公司 | A kind of preparation method of slot-type ventilating brick |
| CN103979986A (en) * | 2014-05-16 | 2014-08-13 | 上海宝明耐火材料有限公司 | Castable for ladle working layer |
| CN103979986B (en) * | 2014-05-16 | 2016-01-20 | 上海宝明耐火材料有限公司 | Steel ladle working layer mould material |
| CN103964879A (en) * | 2014-05-29 | 2014-08-06 | 张婷 | Gunning mix for medium-sized steel ladle |
| CN104130002A (en) * | 2014-07-30 | 2014-11-05 | 长兴攀江冶金材料有限公司 | Magnesium spinel ladle direct current castable |
| CN106631052A (en) * | 2016-09-26 | 2017-05-10 | 北京利尔高温材料股份有限公司 | Micropowder castable for working layer of ladle bottom impact zone |
| WO2018126937A1 (en) * | 2017-01-09 | 2018-07-12 | 武汉科技大学 | Dispersion-type corundum-spinel air-permeable brick and preparation method therefor |
| CN108383534A (en) * | 2018-03-09 | 2018-08-10 | 上海宝钢工业技术服务有限公司 | A kind of pouring materialfor steel ladle and application method of graphene-containing |
| CN108383534B (en) * | 2018-03-09 | 2022-08-05 | 上海宝钢工业技术服务有限公司 | Steel ladle castable containing graphene and use method |
| CN109354485A (en) * | 2018-11-09 | 2019-02-19 | 洛阳索莱特材料科技有限公司 | A kind of fixed structure of ceramic nozzle and the preparation method of ceramic nozzle |
| CN109896846A (en) * | 2019-03-29 | 2019-06-18 | 襄阳聚力新材料科技有限公司 | A kind of intermediate frequency furnace BOTTOM ARGON BLOWING air brick and preparation method thereof |
| CN109896846B (en) * | 2019-03-29 | 2021-06-15 | 襄阳聚力新材料科技有限公司 | Intermediate frequency furnace bottom argon blowing air brick and preparation method thereof |
| CN110698210A (en) * | 2019-10-08 | 2020-01-17 | 上海新泰山高温工程材料有限公司 | Ladle bottom castable with long service life and low cost and preparation method thereof |
| CN114956796A (en) * | 2022-05-27 | 2022-08-30 | 襄阳聚力新材料科技有限公司 | Presynthesized aluminum-magnesium spinel refractory castable for cored furnace |
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Application publication date: 20111228 |