CN103803995B - A kind of medium blast furnace main iron runner pouring material - Google Patents
A kind of medium blast furnace main iron runner pouring material Download PDFInfo
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- CN103803995B CN103803995B CN201410050082.0A CN201410050082A CN103803995B CN 103803995 B CN103803995 B CN 103803995B CN 201410050082 A CN201410050082 A CN 201410050082A CN 103803995 B CN103803995 B CN 103803995B
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- blast furnace
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- iron runner
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Abstract
The present invention relates to a kind of medium blast furnace main iron runner pouring material, belong to field of refractory castable, comprise the component of following parts by weight: magnesium-aluminium spinel 48-56, zirconium mullite hollow ball 1-8, metallic silicon power 3-10, gahnite powder 10-25, useless smelting furnace skin 10-15, strontium titanate powder 3-10, Guangxi mud 1-2, silicon nitride powder 1-5; Additional tripoly phosphate sodium STPP 0.1-0.2, styrene-maleic anhydride 0.05-0.2, Alumina gel suspension 3-8; Described useless smelting furnace skin is the stove skin producing graphite, and it consists of SiC content 70%, C content 26%, SiO
2content 4%.It is good that the blast furnace iron runner that this mould material obtains has thermal shock resistance, and anti-erosion is peeled off by force, the feature that the iron influx large life-span is long.
Description
Technical field
The present invention relates to a kind of medium blast furnace main iron runner pouring material, belong to metallurgical fire resisting material field.
Background technology
Existing main iron runner pouring material is mostly Al
2o
3-SiC-C matter mould material, but common Al
2o
3-SiC-C matter main iron runner pouring material uses on blast furnace, and disposable iron influx is at about 120,000 tons.Along with strengthening smelting, the demand improving hot metal output becomes increasingly conspicuous, and main iron hook requires that the demand that disposable iron influx is large is also more and more urgent, but main iron hook is because heat-shock resistance is poor at present, occurring thermal spalling and structure spalling, cause not anti-erosion, is main iron hook life-span short major reason.
CN102101782A discloses a kind of main iron runner pouring material, and described mould material is by magnesium-aluminium spinel, Brown Alundum, silicon carbide, modified Nano carbon dust, SiO
2micro mist, aluminous cement, α-Al2O3 micro mist, explosion-proof fiber, metallic silicon power, tripoly phosphate sodium STPP, Al (OH)
3with Mg (OH)
2complex sol suspension forms.But this take Brown Alundum as the mould material of principal constituent, heat-shock resistance is poor, easily causes thermal spalling and structure spalling, and main iron hook repairing work frequency is increased substantially, and produces and brings larger hidden danger, still need to improve to blast furnace stability and safety.
Summary of the invention
The object of this invention is to provide a kind of thermal shock resistance good, can resist molten iron preferably and corrode, minimizing is peeled off, a kind of Blast furnace main iron channel castable of long service life.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of medium blast furnace main iron runner pouring material, described mould material is by magnesium-aluminium spinel, zirconium mullite hollow ball, metallic silicon power, gahnite powder, useless smelting furnace skin, strontium titanate powder, Guangxi mud, silicon nitride powder, additional tripoly phosphate sodium STPP, styrene-maleic anhydride, Alumina gel suspension forms, it is characterized in that: the component comprising following parts by weight: magnesium-aluminium spinel 48-56, zirconium mullite hollow ball 1-8, metallic silicon power 3-10, gahnite powder 10-25, useless smelting furnace skin 10-15, strontium titanate powder 3-10, Guangxi mud 1-2, silicon nitride powder 1-5, additional tripoly phosphate sodium STPP 0.1-0.2, styrene-maleic anhydride 0.05-0.2, Alumina gel suspension 3-8, described useless smelting furnace skin is the stove skin producing graphite, and it consists of SiC content 70%, C content 26%, SiO
2content 4%.
A kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the quality index of described magnesium-aluminium spinel is: Al
2o
370-80%.
The main main iron runner pouring material of a kind of medium blast furnace according to claim 1, is characterized in that: the quality index of described gahnite powder is: ZnAl
2o
4>=90%.
The main main iron runner pouring material of a kind of medium blast furnace according to claim 1, is characterized in that: the particle diameter of described strontium titanate is 10 ~ 20nm.
A kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the granularity < of described metallic silicon power 10 microns.
A kind of medium blast furnace main iron runner pouring material according to claim 1, one of them proportioning is: magnesium-aluminium spinel 50, zirconium mullite hollow ball 8, metallic silicon power 3, gahnite powder 12, useless smelting furnace skin 15, strontium titanate powder 10, Guangxi mud 1, silicon nitride powder 1; Additional tripoly phosphate sodium STPP 0.1, styrene-maleic anhydride 0.05, Alumina gel suspension 3; Described useless smelting furnace skin is the stove skin producing graphite, and it consists of SiC content 70%, C content 26%, SiO
2content 4%.
The advantage of mould material of the present invention is: add strontium titanate powder in (1) formula, it is good that this material has thermal shock resistance, erosion-resisting characteristics is good, hardness is high, wear-resistant, can solve the problem that main iron hook peels off preferably, not the problem of resistance to erosion, this material can resist the erosion of detrimental impurity inside molten iron simultaneously; (2) add the zirconium mullite hollow ball that thermal shock resistance is good, both improve the heat-shock resistance of mould material, the volume density of mould material can be reduced again, increase the heat-insulating property of mould material.(3) by introducing gahnite powder, the resistance to acids and bases of mould material can be improved; By adopting Alumina gel as bonding agent, mould material impurity can be made than use conventional cement few as bonding agent, system is pure, colloidal sol and matrix powder more easily generate mullite, mould material Medium Culture forms pin styloid, makes this product heat-shock resistance high, and mullite generates and belongs to microdilatancy structure simultaneously, avoid causing volumetric shrinkage in mould material use procedure, molten iron infiltrates thus destroys the phenomenon generation of structure influence product life; (4) by introducing zirconium mullite hollow ball, compound introduces tripoly phosphate sodium STPP, styrene-maleic anhydride, greatly can increase the mobility of mould material, improve the stability of mould material, decrease the amount of required admixture, improve the workability of mould material, also greatly improve the work-ing life of mould material simultaneously.(5) introduce the stove skin of smelting, erosion-resistant silicon carbide and graphite carbon can be provided, achieve the object of product, again reduce cost.
A preparation method for medium blast furnace main iron hook, comprises step one, batching: weigh magnesium-aluminium spinel 48-56 by weight, zirconium mullite hollow ball 1-8, metallic silicon power 3-10, gahnite powder 10-25, useless smelting furnace skin 10-15, strontium titanate powder 3-10, Guangxi mud 1-2, silicon nitride powder 1-5; Additional tripoly phosphate sodium STPP 0.1-0.2, styrene-maleic anhydride 0.05-0.2, Alumina gel suspension 3-8; Stir after 5-8 minute, after natural curing 1-2 hour, the demoulding obtains main trough of blast furnace.
Preparation method of the present invention exempts from baking, when preparing main iron hook, construct after formula mould material and Alumina gel suspension agitation, through gravity flow or vibrating casting, can come into operation immediately after construction, be used in main trough of blast furnace, continuous tapping is without repairing, through comparing use on same blast furnace, iron influx reaches more than 150% of like product, and work-ing life is also longer.
Embodiment
The formula 1 of medium blast furnace main iron runner pouring material, comprises the component of following parts by weight: magnesium-aluminium spinel 50, zirconium mullite hollow ball 8, metallic silicon power 3, gahnite powder 24, useless smelting furnace skin 10, strontium titanate powder 3, Guangxi mud 1, silicon nitride powder 1; Additional tripoly phosphate sodium STPP 0.1, styrene-maleic anhydride 0.05, Alumina gel suspension 3.
The formula 2 of medium blast furnace main iron runner pouring material, comprises the component of following parts by weight: magnesium-aluminium spinel 51, zirconium mullite hollow ball 8, metallic silicon power 3, gahnite powder 11, useless smelting furnace skin 15, strontium titanate powder 10, Guangxi mud 1, silicon nitride powder 1; Additional tripoly phosphate sodium STPP 0.1, styrene-maleic anhydride 0.05, Alumina gel suspension 5.
Medium blast furnace goes out the formula 3 of main iron runner pouring material, comprises the component of following parts by weight: magnesium-aluminium spinel 52, zirconium mullite hollow ball 8, metallic silicon power 3, gahnite powder 20, useless smelting furnace skin 10, alumina powder 3, Guangxi mud 1, strontium titanate powder 1; Additional tripoly phosphate sodium STPP 0.1, styrene-maleic anhydride 0.05, Alumina gel suspension 6.
Embodiment one
Formula 1 is used to prepare main trough of blast furnace: prepare burden by formula 1 and stir after for mould material at stirrer, in the mould installed in the main iron hook that molten iron flows through, add mould material, the natural curing demoulding in 1 hour obtains main trough of blast furnace.
Embodiment two
Formula 2 is used to prepare medium blast furnace main iron hook: prepare burden by formula 1 and stir after for mould material at stirrer, in the mould installed in the main iron hook that molten iron flows through, add mould material, the natural curing demoulding in 1 hour obtains main trough of blast furnace.
Embodiment three
Formula 3 is used to prepare medium blast furnace main iron hook: prepare burden by formula 1 and stir after for mould material at stirrer, in the mould installed in the main iron hook that molten iron flows through, add mould material, the natural curing demoulding in 1 hour obtains main trough of blast furnace.Specific targets see the following form
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification sheets, as long as but be all subject to the protection of patent law in right of the present invention.
Claims (6)
1. a medium blast furnace main iron runner pouring material, described mould material is by magnesium-aluminium spinel, zirconium mullite hollow ball, metallic silicon power, gahnite powder, useless smelting furnace skin, strontium titanate powder, Guangxi mud, silicon nitride powder, additional tripoly phosphate sodium STPP, styrene-maleic anhydride, Alumina gel suspension form, it is characterized in that: the component comprising following parts by weight: magnesium-aluminium spinel 48-56, zirconium mullite hollow ball 1-8, metallic silicon power 3-10, gahnite powder 10-25, useless smelting furnace skin 10-15, strontium titanate powder 3-10, Guangxi mud 1-2, silicon nitride powder 1-5; Additional tripoly phosphate sodium STPP 0.1-0.2, styrene-maleic anhydride 0.05-0.2, Alumina gel suspension 3-8; Described useless smelting furnace skin is the stove skin producing graphite, and it consists of SiC content 70%, C content 26%, SiO
2content 4%.
2. a kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the quality index of described magnesium-aluminium spinel is: Al
2o
370-80%.
3. a kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the particle diameter of described strontium titanate is 20 ~ 40nm.
4. a kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the quality index of described gahnite powder is: ZnAl
2o
4>=90%.
5. a kind of medium blast furnace main iron runner pouring material according to claim 1, is characterized in that: the granularity < of described metallic silicon power 10 microns.
6. a kind of medium blast furnace main iron runner pouring material according to claim 1, one of them proportioning is: magnesium-aluminium spinel 50, zirconium mullite hollow ball 8, metallic silicon power 3, gahnite powder 12, useless smelting furnace skin 15, strontium titanate powder 10, Guangxi mud 1, silicon nitride powder 1; Additional tripoly phosphate sodium STPP 0.1, styrene-maleic anhydride 0.05, Alumina gel suspension 3; Described useless smelting furnace skin is the stove skin producing graphite, and what it was main consists of SiC content 70%, C content 26%, SiO
2content 4%.
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|---|---|---|---|
| CN201410050082.0A CN103803995B (en) | 2014-02-14 | 2014-02-14 | A kind of medium blast furnace main iron runner pouring material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050082.0A CN103803995B (en) | 2014-02-14 | 2014-02-14 | A kind of medium blast furnace main iron runner pouring material |
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| CN103803995A CN103803995A (en) | 2014-05-21 |
| CN103803995B true CN103803995B (en) | 2015-09-02 |
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| CN107986765B (en) * | 2017-12-25 | 2020-05-12 | 中国京冶工程技术有限公司 | Anti-cracking swinging launder castable for blast furnace and preparation method thereof |
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| CN101767999B (en) * | 2009-11-17 | 2013-05-08 | 高树森 | Al2O3-MA-SiC-C refractory castable material with carbon wrapped by nano Al2O3-SiC film and preparation method thereof |
| CN102757252B (en) * | 2012-08-09 | 2013-07-31 | 山国强 | 1080 m<3> blast furnace main iron runner castable |
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