CN104446547B - A kind of medium-frequency induction furnace furnace lining material and preparation method thereof and using method - Google Patents
A kind of medium-frequency induction furnace furnace lining material and preparation method thereof and using method Download PDFInfo
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- CN104446547B CN104446547B CN201410708336.3A CN201410708336A CN104446547B CN 104446547 B CN104446547 B CN 104446547B CN 201410708336 A CN201410708336 A CN 201410708336A CN 104446547 B CN104446547 B CN 104446547B
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Abstract
The invention belongs to metallurgy and use fire proof material of furnace lining field, in order to overcome the deficiencies in the prior art, a kind of medium-frequency induction furnace furnace lining material and preparation method thereof and the using method of being to provide of the present invention. This furnace lining material comprises the raw material of following weight proportion: 75～90 parts of fused magnesites, 0.5～1 part of boric acid powder, 1～2 part of fine silica powder; In above-mentioned formula, when imposing slag line and during with upper part, needing to add 6～15 parts of schmigels; In the time imposing the following position of slag line, need to add 10～20 parts of magnesium chamotte. The present invention is directed to high temperature alloy intermediate frequency furnace and smelt special process requirements, the compound Lining material with higher thermal shock resistance and resistance to slag is provided, compared with single direct use magnalium matter or magnesia furnace lining material, reduce slag line erosive velocity, improve slag lining heat impact strength, slag line and body of heater are approached service life, thereby improve body of heater whole service life, reduce material consumption.
Description
Technical field
The invention belongs to metallurgy and use fire proof material of furnace lining field, relate to a kind of furnace lining material of smelting high temperature alloy medium-frequency induction furnaceMaterial and preparation method thereof and using method.
Background technology
Along with expansion, the steel-smelting technology of Iron and Steel Enterprises in China scale are constantly updated, steel grade constantly increases, a series of metallurgical new technologies,New technology obtains promotion and application widely, particularly intermediate frequency furnace technology. High efficiency, rapid melting, maximization have become at presentThe new trend of intermediate frequency furnace development, thus, cost and performance to supporting furnace lining material are had higher requirement.
Medium-frequency induction furnace furnace lining material used can be divided into acidity, neutrality and alkaline three classes by character.
Basic lining material is mainly more than 92% fettling magnesite grain and the fused magnesite of content of magnesia, is applicable to the low silicon alloy steel of meltingAnd alkaline steel grade. It is very high that magnesian has refractoriness, has good alkali resistance slag performance and the stability of resistance to physics chemical actionAdvantage, but its coefficient of expansion is larger, resistance to thermal shock performance is bad, intermittent operation furnace wall easily cracks, and is suitable for continuouslyProperty operation. Fused magnesite is because its purity is high, impurity is few, performance is better than common fettling magnesite grain, can melting heat resisting steel, stainless steelEtc. material, its price is also higher.
Neutral lining material is mainly alumina-based material, and the most frequently used is calcining bauxite grog and electro-corundum. Bauxite toolHave the advantage that price is low, refractoriness is high, chemical stability is good and thermal shock resistance is good, be applicable to melting gray iron, magnesium iron, carbon steel,The materials such as potassium steel; It is difficult for and acid, basic slag chemically reactive, and intermittent blow-on is difficult for cracking. Electro-corundum is aluminiumAlumina or alumina powder make at electric refusion in the stove, Al2O3Content is high, has high refractoriness, and properties is all better than bauxite,Through being usually used in the preferred material of steel-making of intermediate frequency furnace furnace lining, but its price is more expensive with respect to magnesia.
Acid liner material is mainly silica based materials, and the most frequently used is quartz sand. Siliceously have that price is low, refractoriness is moderate,The advantage that thermal shock resistance is good, is applicable to the relatively low ferro-aluminum product of smelting temperature. Relatively low but the material of siliceous furnace lining use costMaterial refractoriness is lower, limits its scope of application.
Special steel alloy kind for part smelting temperature more than 1700 DEG C, the magnesia furnace lining of fused magnesite material can meetThe temperature requirement of its pyrolytic semlting needs to add active lime and fluorite to carry out covering protection to solution in melting process. Bring intoFluorite in slag and magnesian form low viscosity, low melting point eutectic, thereby have accelerated erosive velocity. Meanwhile, magnesianThe coefficient of expansion is larger, and resistance to thermal shock performance is poor, easily cracks, while causing body of heater to be scrapped because of slag line erosion or crackle, and slag line portionPosition still can be used 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 parts: slag line and adopt magnalium matter furnace lining material with upper part;The following position of slag line adopts magnesia furnace lining material.
Furnace lining material of the present invention comprises the raw material of following weight proportion:
75～90 parts of fused magnesites, 0.5～1 part of boric acid powder, 1～2 part of fine silica powder.
When furnace lining material imposes slag line and during with upper part, also adds the raw material of following weight proportion: 6～15 parts of schmigels. ?Slag line and adopt the raw material of magnalium matter furnace lining material to form according to following weight proportion with upper part: 75～90 parts of fused magnesites, boron0.5～1 part, acid powder, 1～2 part of fine silica powder, 6～15 parts of schmigels.
In the time that furnace lining material imposes the following position of slag line, also add the raw material of following weight proportion: 10～20 parts of magnesium chamotte. It is slagThe following position of line adopts the raw material of magnesia furnace lining material to form according to following weight proportion: 75～90 parts of fused magnesites, boric acid powder0.5～1 part, 1～2 part of fine silica powder, 10～20 parts of magnesium chamotte.
Described, the physical and chemical index of fused magnesite, schmigel, magnesium chamotte and SiO 2 superfine powder is respectively: in fused magnesiteAl in MgO >=95%, schmigel2O3>=95%, SiO in MgO >=90%, SiO 2 superfine powder in magnesium chamotte2≥90％。
In furnace lining material of the present invention, fused magnesite 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, schmigel, magnesium chamotte is≤0.088mm.
The present invention also provides the preparation method of this medium-frequency induction furnace furnace lining material:
A, each raw meal is broken to targeted particle size;
B. external adding water 1%～3% mixes each raw material by weight percentage, to obtain final product.
The present invention also provides the using method of this medium-frequency induction furnace furnace lining material: with the construction of ramming method, wherein slag line andAdopt magnalium matter furnace lining material construction of the present invention with upper part, the following position of slag line adopts the magnesia furnace lining material construction of the present invention. ItsIn, described ramming can adopt artificial or mechanical system ramming.
Know-why of the present invention is: impose slag line and the furnace lining material with upper part, in magnesia furnace lining material, add corundumMatter powder substitutes magnesium chamotte and forms magnalium matter furnace lining material, by forming In-suit spinel after high temperature sintering, and then forms magnalium pointSpar network, furnace lining material spinelleization is reacted the expansion and the micro-crack that occur, has cushioned the thermal stress of furnace lining material the inside, thereforeIts anti-thermal shock function is good. The magnesium aluminate spinel that simultaneous reactions generates has stronger anti-infiltration effectiveness to slag, has good heightTemperature stability and intensity, to slag have good corrosion resistance strong so can effectively extend intermediate frequency furnace slag lining and more thanThe service life at position, the object of synchronizeing to reach the following converter life of body of heater slag line and slag lining. By introducing silicaUltramicro-powder, can increase the middle elevated temperature strength of furnace lining material, and the liquid phase of its generation can effectively reduce furnace lining material thermal stress; WithTime SiO 2 superfine powder there is high activity, at Al2O3Under the prerequisite existing, more easily generate mullite phase, make furnace lining materialElevated temperature strength, thermal shock resistance obviously improve. Introduce the firing temperature that boric acid can reduce furnace lining material, improve the middle temperature of furnace lining materialIntensity, also can reduce spinelle reacting initial temperature.
Advantage of the present invention is: by adjusting the matrix composition of magnesian ramming mass at different parts, make slag line and converter life phaseClosely, improve the bulk life time of body of heater, reduced intermediate frequency furnace ramming mass use cost.
Detailed description of the invention
Application example 1
Smelt potassium steel on 1.0 tons of intermediate frequency furnaces time, adopt the present invention to construct, body of heater whole service life reaches 38 times,Firing temperature is at 1650 DEG C, and material has produced and produced sufficient intensity because of sintering. When contrasting magnesia intermediate frequency furnace and using 26 times,Because slag lining corrosion is rolled off the production line, firing temperature is at 1680 DEG C, and material just completes sintering and produces intensity.
Wherein, slag line and taking the raw material weight proportioning of the magnalium matter furnace lining material of upper part as 75 parts of fused magnesites, boric acid powder 1Part, 2 parts of fine silica powders, 15 parts of schmigels.
The raw material weight proportioning of the magnesia furnace lining material at the following position of slag line is: 75 parts of fused magnesites, 1 part of boric acid powder, titanium dioxide2 parts of silicon powders, 20 parts of magnesium chamotte.
Application example 2
On 1.5 tons of intermediate frequency furnaces, when smelting ferrovanadium, adopt the present invention to construct, body of heater whole service life reaches 28 times, burnsBecome temperature at 1667 DEG C, material has produced and has produced sufficient intensity because of sintering. When contrasting magnesia intermediate frequency furnace and using 22 times,Roll off the production line because crackle and corrosion appear in slag lining, firing temperature is at 1690 DEG C, and material just completes sintering and produces intensity.
Wherein, slag line and taking the raw material weight proportioning of the magnalium matter furnace lining material of upper part as 90 parts of fused magnesites, boric acid powder0.5 part, 1 part of fine silica powder, 6 parts of schmigels.
The raw material weight proportioning of the magnesia furnace lining material at the following position of slag line is: 90 parts of fused magnesites, 0.5 part of boric acid powder, dioxy1 part of SiClx micro mist, 10 parts of magnesium chamotte.
Application example 3
Smelt ferro-aluminum on 0.8 ton of intermediate frequency furnace time, adopt the present invention to construct, body of heater whole service life reaches 210 times,Firing temperature is at 1620 DEG C, and material has produced and produced sufficient intensity because of sintering. When contrasting magnesia intermediate frequency furnace and using 183 times,Roll off the production line because slag lining occurs that dry slag heat size dwindles, firing temperature is at 1625 DEG C, and material just completes sintering and produces intensity.
Wherein, slag line and taking the raw material weight proportioning of the magnalium matter furnace lining material of upper part as 85 parts of fused magnesites, boric acid powder 1Part, 1.5 parts of fine silica powders, 10 parts of schmigels.
The raw material weight proportioning of the magnesia furnace lining material at the following position of slag line is: 85 parts of fused magnesites, 1 part of boric acid powder, titanium dioxide1.5 parts of silicon powders, 15 parts of magnesium chamotte.
To sum up, the present invention is directed to high temperature alloy intermediate frequency furnace and smelt special process requirements, provide and there is higher thermal shock resistanceWith the compound Lining material of resistance to slag, compared with single direct use magnalium matter or magnesia furnace lining material, reduce slag line and corroded speedDegree, has improved slag lining heat impact strength, and slag line and body of heater are approached service life, makes thereby improve body of heater entiretyWith the life-span, reduce material consumption, there is considerable economy, environmental benefit.
Claims (4)
1. medium-frequency induction furnace furnace lining material, is characterized in that: described furnace lining material comprises two parts: slag line and with upper partAdopt magnalium matter furnace lining material; The following position of slag line adopts magnesia furnace lining material;
Wherein, described furnace lining material comprises the raw material of following weight proportion:
75～90 parts of fused magnesites, 0.5～1 part of boric acid powder, 1～2 part of fine silica powder;
Wherein, when furnace lining material imposes slag line and during with upper part, interpolation schmigel is raw material; Described magnalium matter furnace lining materialRaw material forms according to following weight proportion: 75～90 parts of fused magnesites, 0.5～1 part of boric acid powder, 1～2 part of fine silica powder,6～15 parts of schmigels;
Wherein, in the time that furnace lining material imposes the following position of slag line, adding magnesium chamotte is raw material; The raw material of described magnesia furnace lining materialForm according to following weight proportion: 75～90 parts of fused magnesites, 0.5～1 part of boric acid powder, 1～2 part of fine silica powder, magnesium10～20 parts of chamotte; Wherein, the physical and chemical index of described fused magnesite, schmigel, magnesium chamotte and fine silica powder is respectively:MgO >=95% in fused magnesite; Al in schmigel2O3>=95%; MgO >=90% in magnesium chamotte; In fine silica powderSiO2≥90％；
Described fused magnesite by weight, is made up of the component of following granularity:
Granularity≤the 0.088mm of described boric acid powder, fine silica powder, schmigel, magnesium chamotte.
2. the preparation method of furnace lining material for medium-frequency induction furnace claimed in claim 1, is characterized in that comprising the steps:
A, each raw meal is broken to targeted particle size;
B. external adding water 1%～3% mixes each raw material by weight percentage, to obtain final product.
3. the using method of furnace lining material for medium-frequency induction furnace claimed in claim 1, is characterized in that: execute with ramming methodWork, wherein slag line and adopt the construction of magnalium matter furnace lining material with upper part, the following position of slag line adopts magnesia furnace lining material to construct.
4. the using method of furnace lining material for medium-frequency induction furnace according to claim 3, is characterized in that: described rammingAdopt artificial or mechanical system ramming.
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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 |
| CN112125682B (en) * | 2020-08-21 | 2022-05-31 | 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 |
| CN112321282B (en) * | 2020-11-05 | 2022-04-12 | 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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| CN101792322B (en) * | 2010-02-23 | 2013-03-13 | 上海柯瑞冶金炉料有限公司 | Environment-friendly aqueous long-life self-flowing repairing mix for converter and preparation method thereof |
| CN101823888A (en) * | 2010-03-29 | 2010-09-08 | 天津大学 | Working lining for continuous cast steel tundish with environmental-friendly binder |
| CN102062540B (en) * | 2010-06-18 | 2013-07-03 | 四川龙蟒矿冶有限责任公司 | Composite-structured electric furnace lining |
| CN103058669A (en) * | 2011-10-19 | 2013-04-24 | 贵阳联合高温材料有限公司 | Metallurgy electromagnetic induction intermediate frequency furnace ramming material |
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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. |