CN104446547A - Furnace lining material used for medium-frequency induction furnace as well as preparation method and use method of furnace lining material - Google Patents
Furnace lining material used for medium-frequency induction furnace as well as preparation method and use method of furnace lining material Download PDFInfo
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- CN104446547A CN104446547A CN201410708336.3A CN201410708336A CN104446547A CN 104446547 A CN104446547 A CN 104446547A CN 201410708336 A CN201410708336 A CN 201410708336A CN 104446547 A CN104446547 A CN 104446547A
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Abstract
The invention belongs to the field of furnace lining fireproof materials used for metallurgy, and provides a furnace lining material used for a medium-frequency induction furnace as well as a preparation method and a use method of the furnace lining material to overcome defects in the prior art. The furnace lining material comprises the following raw materials in parts by weight: 75-90 parts of fused magnesia, 0.5-1 part of boric acid powder and 1-2 parts of fine silicon dioxide powder; when a slag line and the portion, above the slag line, of the furnace lining material are prepared, 6-15 parts of emery powder needs to be added; when the portion, below the slag line, of the furnace lining material is prepared, 10-20 parts of magnesium cement needs to be added. To meet special process requirements of high-temperature alloy medium-frequency furnace smelting, the invention provides the composite furnace lining material with high thermal shock resistance and slag resistance; compared with a furnace lining material directly prepared from only magnesium-aluminum alloy or magnesium, the erosion speed of the slag line is reduced, thermal shock and cold shock resistance performance of the slag line are improved, the service life of the slag line is close to that of a furnace body, and therefore, the service life of the whole furnace body is prolonged and the material consumption is reduced.
Description
Technical field
The invention belongs to metallurgy fire proof material of furnace lining field, relate to and a kind ofly smelt furnace lining material of superalloy medium-frequency induction furnace and preparation method thereof and using method.
Background technology
Along with the expansion of Iron and Steel Enterprises in China scale, steel-smelting technology constantly update, steel grade constantly increases, a series of New Metallurgical Technique, novel process obtain promotion and application widely, particularly intermediate frequency furnace technology.High-level efficiency, rapid melting, maximization have become the new trend of current medium-frequency induction furnace development, thus, have higher requirement to the cost of supporting furnace lining material and performance.
Medium-frequency induction furnace furnace lining material used can be divided into acidity, neutrality and alkaline three classes by character.
Basic lining material is the fettling magnesite grain of content of magnesia more than 92% and electrosmelted magnesite clinker mainly, is applicable to the low silicon alloy steel of melting and alkaline steel grade.It is very high that magnesian has refractoriness, has the advantage of the stability of good alkali-resistivity slag performance and resistance to physics chemical action, but its coefficient of expansion is comparatively large, and resistance to thermal shock performance is bad, and intermittent operation furnace wall easily cracks, and is suitable for continuous production process.Electrosmelted magnesite clinker, can the material such as melting high temperature steel, stainless steel because its purity is high, impurity is few, performance is better than ordinary metallurgical magnesia, and its price is also higher.
Neutral lining material mainly alumina-based material, the most frequently used is calcining bauxite and fused corundom.Bauxitic clay has the advantage that price is low, refractoriness is high, chemical stability is good and thermal shock resistance is good, is applicable to the materials such as melting gray iron, magnesium iron, carbon steel, high mangaenese steel; Its not easily with acid, basic slag react with, intermittent blow-on not easily cracks.Fused corundom is that bauxitic clay or aluminum oxide powder obtain at electric refusion in the stove, Al
2o
3content is high, and have high refractoriness, properties is all better than bauxitic clay, and through being usually used in the preferred material of steel-making of intermediate frequency furnace furnace lining, but its price relative to magnesia costly.
Acid liner material is silica based materials mainly, and the most frequently used is quartz sand.Siliceous have the advantage that price is low, refractoriness is moderate, thermal shock resistance is good, is applicable to the ferro-aluminum product that smelting temperature is relatively low.Siliceous furnace lining use cost is relatively low but material refractoriness is lower, limits its use range.
For the Special Alloy Steel kind of part smelting temperature more than 1700 DEG C, the magnesia furnace lining of electrosmelted magnesite clinker material can meet the temperature requirement of its pyrotic smelting, needs to add quickened lime and fluorite carries out covering protection to solution in melting process.Bring fluorite in slag into and magnesian forms low viscosity, low melting point eutectic, thus accelerate erosive velocity.Meanwhile, the magnesian coefficient of expansion is comparatively large, and resistance to thermal shock poor performance, easily cracks, and when causing body of heater to be scrapped because of slag line erosion or crackle, slag lining still can use with lower furnace body, and the two is asynchronous and cause waste.
Summary of the invention
In order to overcome the deficiencies in the prior art, be of the present inventionly to provide a kind of medium-frequency induction furnace furnace lining material.
Medium-frequency induction furnace furnace lining material of the present invention, comprises two portions: slag line and above position adopt magnalium matter furnace lining material; Slag line adopts magnesia furnace lining material with lower portion.
Furnace lining material of the present invention comprises the raw material of following weight proportion:
Electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part.
When furnace lining material imposes slag line and above position, also add the raw material of following weight proportion: lapis amiridis 6 ~ 15 parts.Namely slag line and above position adopt the raw material of magnalium matter furnace lining material to form according to following weight proportion: electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part, lapis amiridis 6 ~ 15 parts.
When furnace lining material imposes slag line with lower portion, also add the raw material of following weight proportion: magnesium chamotte 10 ~ 20 parts.Namely slag line adopts the raw material of magnesia furnace lining material to form according to following weight proportion with lower portion: electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part, magnesium chamotte 10 ~ 20 parts.
Described, the physical and chemical index of electrosmelted magnesite clinker, lapis amiridis, magnesium chamotte and SiO 2 superfine powder is respectively: Al in MgO>=95%, lapis amiridis in electrosmelted magnesite clinker
2o
3>=95%, SiO in MgO>=90%, SiO 2 superfine powder in magnesium chamotte
2>=90%.
In furnace lining material of the present invention, electrosmelted magnesite clinker is by weight, is made up of the component of following granularity:
The granularity of furnace lining material mesoboric acid powder of the present invention, fine silica powder, lapis amiridis, magnesium chamotte is≤0.088mm.
Present invention also offers the preparation method of this medium-frequency induction furnace furnace lining material:
A, by each raw material pulverizing to targeted particle size;
B. external adding water 1% ~ 3% mixes each raw material by weight percentage, to obtain final product.
Present invention also offers the using method of this medium-frequency induction furnace furnace lining material: with the construction of ramming method, wherein slag line and above position adopt magnalium matter furnace lining material of the present invention to construct, slag line adopts the magnesia furnace lining material construction of the present invention with lower portion.Wherein, described ramming can adopt artificial or mechanical system ramming.
Know-why of the present invention is: the furnace lining material imposing slag line and above position, in magnesia furnace lining material, add corundum powder substitute magnesium chamotte formation magnalium matter furnace lining material, by forming In-suit spinel after high temperature sintering, and then form magnesium-aluminium spinel network, the expansion that the reaction of furnace lining material spinel occurs and tiny crack, cushioned the thermal stresses inside furnace lining material, therefore its anti-thermal shock function is good.The magnesium-aluminium spinel that simultaneous reactions generates has stronger anti-infiltration effectiveness to slag, there is excellent high-temperature stability and intensity, there is good corrosion resistance strong so the work-ing life at intermediate frequency furnace slag lining and above position effectively can be extended, to reach the synchronous object of the following converter life of body of heater slag line and slag lining to slag.By introducing SiO 2 superfine powder, can increase the middle hot strength of furnace lining material, its liquid phase generated can effectively reduce furnace lining material thermal stresses; SiO 2 superfine powder has high reactivity, at Al simultaneously
2o
3under the prerequisite existed, more easily generate mullite phase, make the hot strength of furnace lining material, thermal shock resistance significantly improves.Introduce the firing temperature that boric acid can reduce furnace lining material, improve the medium temperature intensity of furnace lining material, also can reduce spinel reacting initial temperature.
Advantage of the present invention is: consist of in the matrix of different sites adjustment magnesian ramming mass, make slag line close with converter life, improve the bulk life time of body of heater, reduce intermediate frequency furnace ramming mass use cost.
Embodiment
Application example 1
When high mangaenese steel smelted by 1.0 tons of intermediate frequency furnaces, adopt the present invention to construct, body of heater whole service life reaches 38 times, and firing temperature is at 1650 DEG C, and material has produced and produced sufficient intensity because of sintering.Contrast magnesia intermediate frequency furnace when using 26 times, roll off the production line because of slag lining corrosion, firing temperature is at 1680 DEG C, and material just completes sintering and produces intensity.
Wherein, the raw material weight proportioning of the magnalium matter furnace lining material at slag line and above position is: electrosmelted magnesite clinker 75 parts, boric acid powder 1 part, fine silica powder 2 parts, lapis amiridis 15 parts.
Slag line with the raw material weight proportioning of the magnesia furnace lining material of lower portion is: electrosmelted magnesite clinker 75 parts, boric acid powder 1 part, fine silica powder 2 parts, magnesium chamotte 20 parts.
Application example 2
On 1.5 tons of intermediate frequency furnaces during smelting ferrovanadium, adopt the present invention to construct, body of heater whole service life reaches 28 times, and firing temperature is at 1667 DEG C, and material has produced and produced sufficient intensity because of sintering.Contrast magnesia intermediate frequency furnace when using 22 times, roll off the production line because slag lining occurs crackle and corrosion, firing temperature is at 1690 DEG C, and material just completes sintering and produces intensity.
Wherein, the raw material weight proportioning of the magnalium matter furnace lining material at slag line and above position is: electrosmelted magnesite clinker 90 parts, boric acid powder 0.5 part, fine silica powder 1 part, lapis amiridis 6 parts.
Slag line with the raw material weight proportioning of the magnesia furnace lining material of lower portion is: electrosmelted magnesite clinker 90 parts, boric acid powder 0.5 part, fine silica powder 1 part, magnesium chamotte 10 parts.
Application example 3
When ferro-aluminum smelted by 0.8 ton of intermediate frequency furnace, adopt the present invention to construct, body of heater whole service life reaches 210 times, and firing temperature is at 1620 DEG C, and material has produced and produced sufficient intensity because of sintering.Contrast magnesia intermediate frequency furnace when using 183 times, because slag lining occurs that dry slag heat size reduces and rolls off the production line, firing temperature is at 1625 DEG C, and material just completes sintering and produces intensity.
Wherein, the raw material weight proportioning of the magnalium matter furnace lining material at slag line and above position is: electrosmelted magnesite clinker 85 parts, boric acid powder 1 part, fine silica powder 1.5 parts, lapis amiridis 10 parts.
Slag line with the raw material weight proportioning of the magnesia furnace lining material of lower portion is: electrosmelted magnesite clinker 85 parts, boric acid powder 1 part, fine silica powder 1.5 parts, magnesium chamotte 15 parts.
To sum up, the present invention is directed to superalloy intermediate frequency furnace and smelt special process requirements, provide the compound Lining material with higher thermal shock resistance and slag resistance, compared with single direct use magnalium matter or magnesia furnace lining material, reduce slag line erosive velocity, improve slag lining heat impact strength, make slag line and body of heater close for work-ing life, thus improve body of heater whole service life, reduce materials consumption, there is considerable economy, environmental benefit.
Claims (8)
1. medium-frequency induction furnace furnace lining material, is characterized in that: described furnace lining material comprises two portions: slag line and above position adopt magnalium matter furnace lining material; Slag line adopts magnesia furnace lining material with lower portion.
2. medium-frequency induction furnace furnace lining material according to claim 1, is characterized in that: described furnace lining material comprises the raw material of following weight proportion:
Electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part;
Wherein, when furnace lining material imposes slag line and above position, interpolation lapis amiridis is raw material; The raw material of described magnalium matter furnace lining material forms according to following weight proportion: electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part, lapis amiridis 6 ~ 15 parts;
Wherein, when furnace lining material imposes slag line with lower portion, adding magnesium chamotte is raw material; The raw material of described magnesia furnace lining material forms according to following weight proportion: electrosmelted magnesite clinker 75 ~ 90 parts, boric acid powder 0.5 ~ 1 part, fine silica powder 1 ~ 2 part, magnesium chamotte 10 ~ 20 parts.
3. medium-frequency induction furnace furnace lining material according to claim 2, is characterized in that: the physical and chemical index of described electrosmelted magnesite clinker, lapis amiridis, magnesium chamotte and SiO 2 superfine powder is respectively: MgO>=95% in electrosmelted magnesite clinker; Al in lapis amiridis
2o
3>=95%; MgO>=90% in magnesium chamotte; SiO in SiO 2 superfine powder
2>=90%.
4. the medium-frequency induction furnace furnace lining material according to Claims 2 or 3, is characterized in that: described electrosmelted magnesite clinker by weight, is made up of the component of following granularity:
5. the medium-frequency induction furnace furnace lining material according to Claims 2 or 3, is characterized in that: the granularity≤0.088mm of described boric acid powder, fine silica powder, lapis amiridis, magnesium chamotte.
6. the preparation method of the medium-frequency induction furnace furnace lining material described in any one of claim 1-5, is characterized in that comprising the steps:
A, by each raw material pulverizing to targeted particle size;
B. external adding water 1% ~ 3% mixes each raw material by weight percentage, to obtain final product.
7. the using method of the medium-frequency induction furnace furnace lining material described in any one of claim 1-5, it is characterized in that: construct with ramming method, wherein slag line and above position adopt magnalium matter furnace lining material of the present invention to construct, and slag line adopts the magnesia furnace lining material construction of the present invention with lower portion.
8. the using method of medium-frequency induction furnace furnace lining material according to claim 7, is characterized in that: described ramming adopts artificial or mechanical system ramming.
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| CN201410708336.3A CN104446547B (en) | 2014-11-28 | 2014-11-28 | A kind of medium-frequency induction furnace furnace lining material and preparation method thereof and using method |
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Cited By (6)
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| CN109020524A (en) * | 2018-08-09 | 2018-12-18 | 宁国市挚友合金钢材料有限公司 | A kind of medium-frequency induction furnace furnace lining material and preparation method thereof |
| CN110304909A (en) * | 2019-07-21 | 2019-10-08 | 山东耐火材料集团有限公司 | Hot investment casting intermediate frequency furnace dry materials and preparation method thereof |
| CN111018497A (en) * | 2019-12-09 | 2020-04-17 | 湖北安耐捷炉衬材料有限公司 | Alkaline ramming material for medium-frequency induction furnace |
| CN112125682A (en) * | 2020-08-21 | 2020-12-25 | 宁波长振铜业有限公司 | Furnace striking material for melting channel of regenerative brass power frequency induction furnace and use method |
| CN112321282A (en) * | 2020-11-05 | 2021-02-05 | 山东瑞泰新材料科技有限公司 | High-strength magnesium oxide crucible and preparation method thereof |
| CN114890775A (en) * | 2022-06-02 | 2022-08-12 | 凤城市千誉钛业有限公司 | Furnace lining material of titanium slag smelting submerged arc furnace and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020524A (en) * | 2018-08-09 | 2018-12-18 | 宁国市挚友合金钢材料有限公司 | A kind of medium-frequency induction furnace furnace lining material and preparation method thereof |
| CN110304909A (en) * | 2019-07-21 | 2019-10-08 | 山东耐火材料集团有限公司 | Hot investment casting intermediate frequency furnace dry materials and preparation method thereof |
| CN111018497A (en) * | 2019-12-09 | 2020-04-17 | 湖北安耐捷炉衬材料有限公司 | Alkaline ramming material for medium-frequency induction furnace |
| CN112125682A (en) * | 2020-08-21 | 2020-12-25 | 宁波长振铜业有限公司 | Furnace striking material for melting channel of regenerative brass power frequency induction furnace and use method |
| CN112321282A (en) * | 2020-11-05 | 2021-02-05 | 山东瑞泰新材料科技有限公司 | High-strength magnesium oxide crucible and preparation method thereof |
| CN114890775A (en) * | 2022-06-02 | 2022-08-12 | 凤城市千誉钛业有限公司 | Furnace lining material of titanium slag smelting submerged arc furnace and preparation method thereof |
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| CN104446547B (en) | 2016-05-11 |
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Effective date of registration: 20210809 Address after: 617063 Panzhihua Steel City Group ruikuang Industry Co., Ltd., Longqing Road, Guaziping, East District, Panzhihua City, Sichuan Province Patentee after: PANZHIHUA GANGCHENG GROUP RUIKUANG INDUSTRY Co.,Ltd. Address before: 617023, kapok Road, 72, Panzhihua, Sichuan Patentee before: PANZHIHUA GANGCHENG GROUP Co.,Ltd. |