CN107129313A - A kind of continuous casting tundish coating and preparation method thereof - Google Patents

A kind of continuous casting tundish coating and preparation method thereof Download PDF

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Publication number
CN107129313A
CN107129313A CN201710345271.4A CN201710345271A CN107129313A CN 107129313 A CN107129313 A CN 107129313A CN 201710345271 A CN201710345271 A CN 201710345271A CN 107129313 A CN107129313 A CN 107129313A
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CN
China
Prior art keywords
continuous casting
casting tundish
tundish coating
preparation
powder
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710345271.4A
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Chinese (zh)
Inventor
黄奥
顾华志
连朋飞
张美杰
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Wuhan University of Science and Engineering WUSE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Wuhan University of Science and Engineering WUSE filed Critical Wuhan University of Science and Engineering WUSE
Priority to CN201710345271.4A priority Critical patent/CN107129313A/en
Publication of CN107129313A publication Critical patent/CN107129313A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings

Abstract

The present invention relates to a kind of continuous casting tundish coating and preparation method thereof.Its technical scheme is：Calcium hydroxide micro mist using 45 ~ 65wt% limestone particle, 5 ~ 15wt% agstone, 15 ~ 35wt% mangaic acid calcium powder, the 1 ~ 10wt% sour calcium powder of cobalt, 1 ~ 5wt% ruthenic acid calcium powder and 1 ~ 4wt% is raw material, add organic fiber, 0.01 ~ 0.05wt% polycarboxylate dispersant, 0.1 ~ 0.4wt% calcium chloride and the 0.2 ~ 1.5wt% of the 0.03 ~ 0.12wt% of raw material manganese monoxide powder, mixing 1 ~ 3 minute, then the water of the 6 ~ 12wt% of raw material is added, stirred with forced mixer to stream and mould shape, obtain continuous casting tundish coating.Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.Continuous casting tundish coating prepared by this method has the advantages that excellent not phosphorous, tack, good heat insulating, can purify molten steel, antiscour, resistant to corrosion, service life length and environment-friendly.

Description

A kind of continuous casting tundish coating and preparation method thereof
Technical field
The invention belongs to tundish paint technical field.Specifically related to a kind of continuous casting tundish coating and preparation method thereof.
Background technology
Tundish is to be used for the device of molten steel transition between ladle and crystallizer, and it is not only responsible for molten steel from ladle to crystallization The effect of shunting, rectification and storage molten steel between device.But also the refining with molten steel and the new work(of nonmetal inclusion removal Energy.The working lining of tundish typically uses both economical rational fireproof coating, can extend the service life of permanent layer, reduces Refractory consumption rate.Generally alkalescence coating corrosion-resistant property is good, disintegration performance after use, and with the work(of purification molten steel Can, therefore tundish paint is used as using magnesia and MgO CaO coating mostly.
With the fast development of new smelting technique and continuous casting new technology, the requirement to refractory material is more and more harsher, makes Continuous casting production is more and more taken seriously with coating, while being also faced with unprecedented challenge.At present, tundish paint is full Sufficient use requirement, generally using phosphate（Such as sodium tripolyphosphate, calgon）As bonding agent and clay as plasticizer, Phosphatic addition is 1 ~ 4wt% of tundish paint gross mass, the addition of clay for tundish paint gross mass 2 ~ 4wt%.Under the conditions of high temperature, Na can be also formed between 800 DEG C ~ 1500 DEG C2O·2CaO·P2O5, high temperature is not molten and has very High intensity；Na is lost after 1500 DEG C2O, refractoriness very high tricalcium orthophosphate is converted at 1700 DEG C.This change is irreversible, Volume Changes very little during conversion, therefore fireproof coating can remain very high intensity.However, pouring steel mistake in Tundish Connection Cheng Zhong, as tundish paint is constantly damaged by molten steel is molten, the phosphate in tundish paint can also enter in molten steel, increase molten steel Phosphorus, causes the P elements in molten steel to be difficult to control, is unfavorable for the production of high quality low phosphor steel and ultra-low phosphoretic steel, or even cause to change steel And para-crystal, such as phosphate can cause the content of O, C and P element in IF steel significantly to increase；On the other hand, it is residual in the coating after use The phosphate stayed may polluted water.
" tundish paint "（CN103833394A）Patented technology, using magnesia as primary raw material, using calcium lignosulfonate With sodium tripolyphosphate as bonding agent, though the patented technology has the advantages that heat-insulating property is good, the introducing of P elements is to steel Water quality has a certain impact, and erosion resisting is also poor." Phosphateless environmentally friendly tundish paint "（CN104446565A）Patent Technology, using magnesite clinker, forsterite, paper fiber and liquid soluble glass or solid, powdery waterglass as raw material, the patent skill Although art has not phosphorous and erosion resistant advantage, heat-insulating property is poor poor with purifying of steel ability." in the middle of a kind of continuous casting Coating material "（CN105198451A）Patented technology, with dolomite, magnesium chromium give up brick particle, Fine Aluminum Powder, alumina, mild-clay and Alumina cement is raw material, additional sodium tripolyphosphate and paper fiber, is well mixed, add water stirring, you can used in smearing or spraying Between wrap.Though the patented technology has the advantages that cost is low and resource reutilization, the ability of heat-insulating property and purifying of steel is poor.
The content of the invention
It is contemplated that overcoming prior art defect, it is therefore an objective to provide a kind of preparation method of continuous casting tundish coating, institute The continuous casting tundish coating of preparation is not phosphorous, tack is excellent, good heat insulating, can purify molten steel, antiscour, resistant to corrosion, make With long lifespan and environment-friendly.
To realize above-mentioned task, the technical solution adopted in the present invention is：With 45 ~ 65wt% limestone particle, 5 ~ 15wt% agstone, 15 ~ 35wt% mangaic acid calcium powder, 1 ~ 10wt% sour calcium powder of cobalt, 1 ~ 5wt% ruthenic acid calcium powder and 1 ~ 4wt% Calcium hydroxide micro mist be raw material, add organic fiber, the 0.01 ~ 0.05wt% poly- carboxylic of the 0.03 ~ 0.12wt% of raw material The manganese monoxide powder of acid dispersant, 0.1 ~ 0.4wt% calcium chloride and 0.2 ~ 1.5wt%, mixes 1 ~ 3 minute, then adds institute 6 ~ 12wt% of raw material water is stated, is stirred with forced mixer to stream and moulds shape, obtain continuous casting tundish coating.
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
The CaO content of the limestone particle>53.5wt%, granularity≤3mm of limestone particle.
The CaO content of the agstone>54wt%；Granularity≤88 μm of the agstone.
The CaMnO of the mangaic acid calcium powder3Content >=90wt%, granularity≤88 μm.
The Ca of the sour calcium powder of the cobalt2Co2O5Content >=90wt%, granularity≤88 μm.
The CaRuO of the ruthenic acid calcium powder3Content >=90wt%, granularity≤88 μm.
The particle diameter D of the calcium hydroxide micro mist90For 30 ~ 40 μm.
The calcium chloride is anhydrous calcium chloride, calcium chloride dihydrate, four water calcium chloride and one kind in calcium chloride hexahydrate or is Two kinds of mixture.
The MnO contents of the manganese monoxide powder >=99wt%, granularity≤88 μm.
Due to using above-mentioned technical proposal, the present invention has following good effect：
The present invention reacts to form substantial amounts of stomata using the decomposition in situ of limestone particle, is conducive to heat-insulation and heat-preservation and shape in being on active service Into larger thermograde, the medium temperature intensity of continuous casting tundish coating is substantially improved in base portion sinter bonded, while formed Distributed semi conductor agglomerated material can convert heat into electric energy in use, be formed suitably under larger thermograde Electromagnetic field and its damping effect, and the dissolving with " calcium " into slag, the high-temperature conductivity of slag can be obviously improved, slag Viscosity and surface tension also lifted rapidly, can effectively hinder the infiltration of slag, corrode and wash away.Limestone particle and lime Stone flour generates CaO in pyrolytic, and from thermodynamically analyzing, CaO free energy is smaller, namely CaO materials are to molten steel oxygen supply again Possibility it is smaller, do not pollute molten steel not only, and the metallurgical function with purifying of steel.And under the influence of a magnetic field, continuous casting Tundish paint can also promote the Adsorption of inclusion content in melting steel, reach the purpose of purifying of steel.
Therefore, the continuous casting tundish coating prepared by this method has excellent not phosphorous, tack, good heat insulating, energy Purify molten steel, antiscour, resistant to corrosion, service life length and environment-friendly advantage.
Embodiment
With reference to embodiment, the invention will be further described, not to the limitation of its protection domain.
In present embodiment：
The CaO content of the limestone particle>53.5wt%, granularity≤3mm of limestone particle.
The CaO content of the agstone>54wt%；Granularity≤88 μm of the agstone.
The CaMnO of the mangaic acid calcium powder3Content >=90wt%, granularity≤88 μm.
The Ca of the sour calcium powder of the cobalt2Co2O5Content >=90wt%, granularity≤88 μm.
The CaRuO of the ruthenic acid calcium powder3Content >=90wt%, granularity≤88 μm.
The particle diameter D of the calcium hydroxide micro mist90For 30 ~ 40 μm.
The MnO contents of the manganese monoxide powder >=99wt%, granularity≤88 μm.
Repeated no more in embodiment.
Embodiment 1
A kind of continuous casting tundish coating and preparation method thereof.Preparation method is described in the present embodiment：
It is sour with 45 ~ 51wt% limestone particle, 5 ~ 8wt% agstone, 29 ~ 35wt% mangaic acid calcium powder, 7 ~ 10wt% cobalt The calcium hydroxide micro mist of calcium powder, 1 ~ 3wt% ruthenic acid calcium powder and 1 ~ 3wt% is raw material, adds the 0.03 ~ 0.12wt% of raw material Organic fiber, 0.01 ~ 0.05wt% polycarboxylate dispersant, 0.1 ~ 0.4wt% calcium chloride and 0.2 ~ 0.9wt% an oxygen Change manganese powder, mix 1 ~ 3 minute, then add the water of the 6 ~ 12wt% of raw material, stirred with forced mixer to stream and mould shape, obtained To continuous casting tundish coating.
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
The calcium chloride is anhydrous calcium chloride.
Embodiment 2
A kind of continuous casting tundish coating and preparation method thereof.Preparation method is described in the present embodiment：
It is sour with 50 ~ 56wt% limestone particle, 7 ~ 10wt% agstone, 24 ~ 30wt% mangaic acid calcium powder, 5 ~ 8wt% cobalt The calcium hydroxide micro mist of calcium powder, 2 ~ 5wt% ruthenic acid calcium powder and 2 ~ 4wt% is raw material, adds the 0.03 ~ 0.12wt% of raw material Organic fiber, 0.01 ~ 0.05wt% polycarboxylate dispersant, 0.1 ~ 0.4wt% calcium chloride and 0.4 ~ 1.1wt% an oxygen Change manganese powder, mix 1 ~ 3 minute, then add the water of the 6 ~ 12wt% of raw material, stirred with forced mixer to stream and mould shape, obtained To continuous casting tundish coating.
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
The calcium chloride is calcium chloride dihydrate.
Embodiment 3
A kind of continuous casting tundish coating and preparation method thereof.Preparation method is described in the present embodiment：
It is sour with 55 ~ 61wt% limestone particle, 9 ~ 13wt% agstone, 19 ~ 25wt% mangaic acid calcium powder, 3 ~ 6wt% cobalt The calcium hydroxide micro mist of calcium powder, 1 ~ 3wt% ruthenic acid calcium powder and 1 ~ 3wt% is raw material, adds the 0.03 ~ 0.12wt% of raw material Organic fiber, 0.01 ~ 0.05wt% polycarboxylate dispersant, 0.1 ~ 0.4wt% calcium chloride and 0.6 ~ 1.3wt% an oxygen Change manganese powder, mix 1 ~ 3 minute, then add the water of the 6 ~ 12wt% of raw material, stirred with forced mixer to stream and mould shape, obtained To continuous casting tundish coating.
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
The calcium chloride is four water calcium chloride.
Embodiment 4
A kind of continuous casting tundish coating and preparation method thereof.Preparation method is described in the present embodiment：
It is sour with 60 ~ 65wt% limestone particle, 12 ~ 15wt% agstone, 15 ~ 20wt% mangaic acid calcium powder, 1 ~ 4wt% cobalt The calcium hydroxide micro mist of calcium powder, 2 ~ 5wt% ruthenic acid calcium powder and 2 ~ 4wt% is raw material, adds the 0.03 ~ 0.12wt% of raw material Organic fiber, 0.01 ~ 0.05wt% polycarboxylate dispersant, 0.1 ~ 0.4wt% calcium chloride and 0.8 ~ 1.5wt% an oxygen Change manganese powder, mix 1 ~ 3 minute, then add the water of the 6 ~ 12wt% of raw material, stirred with forced mixer to stream and mould shape, obtained To continuous casting tundish coating.
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
The calcium chloride is calcium chloride hexahydrate.
Embodiment 5
A kind of continuous casting tundish coating and preparation method thereof.In addition to calcium chloride, remaining be the same as Example 1：
The calcium chloride is the mixture of anhydrous calcium chloride and calcium chloride dihydrate.
Embodiment 6
A kind of continuous casting tundish coating and preparation method thereof.In addition to calcium chloride, remaining be the same as Example 2：
The calcium chloride is the mixture of calcium chloride dihydrate and four water calcium chloride.
Embodiment 7
A kind of continuous casting tundish coating and preparation method thereof.In addition to calcium chloride, remaining be the same as Example 3：
The calcium chloride is the mixture of four water calcium chloride and calcium chloride hexahydrate.
Embodiment 8
A kind of continuous casting tundish coating and preparation method thereof.In addition to calcium chloride, remaining be the same as Example 4：
The calcium chloride is the mixture of anhydrous calcium chloride and calcium chloride hexahydrate.
Present embodiment compared with prior art, with following good effect：
Present embodiment reacts to form substantial amounts of stomata using the decomposition in situ of limestone particle, is conducive to heat-insulated in being on active service It is incubated and forms larger thermograde, the medium temperature intensity of continuous casting tundish coating is substantially improved in base portion sinter bonded, together When the distributed semi conductor agglomerated material that is formed can convert heat into electric energy in use, the shape under larger thermograde Into appropriate electromagnetic field and its damping effect, and the dissolving with " calcium " into slag, the high-temperature conductivity of slag can be notable Lifting, the viscosity and surface tension of slag are also lifted rapidly, can effectively hinder the infiltration of slag, corrode and wash away.Lime stone Particle and agstone generate CaO in pyrolytic, and from thermodynamically analyzing, CaO free energy is smaller, namely CaO materials pair The possibility of molten steel oxygen supply again is smaller, and molten steel, and the metallurgical function with purifying of steel are not polluted not only.And in the work in magnetic field Under, continuous casting tundish coating can also promote the Adsorption of inclusion content in melting steel, reach the purpose of purifying of steel.
Therefore, the continuous casting tundish coating prepared by this method has excellent not phosphorous, tack, good heat insulating, energy Purify molten steel, antiscour, resistant to corrosion, service life length and environment-friendly advantage.

Claims (10)

1. a kind of preparation method of continuous casting tundish coating, it is characterised in that：With 45 ~ 65wt% limestone particle, 5 ~ 15wt% Agstone, 15 ~ 35wt% mangaic acid calcium powder, 1 ~ 10wt% sour calcium powder of cobalt, 1 ~ 5wt% ruthenic acid calcium powder and 1 ~ 4wt% hydrogen Calcium oxide micro mist is raw material, adds organic fiber, the 0.01 ~ 0.05wt% polycarboxylic acids point of the 0.03 ~ 0.12wt% of raw material The manganese monoxide powder of powder, 0.1 ~ 0.4wt% calcium chloride and 0.2 ~ 1.5wt%, mixes 1 ~ 3 minute, then adds the original Expect 6 ~ 12wt% water, stirred with forced mixer to stream and mould shape, obtain continuous casting tundish coating；
Tundish permanent liner is smeared or be sprayed on to the continuous casting tundish coating.
2. the preparation method of continuous casting tundish coating according to claim 1, it is characterised in that the limestone particle CaO content>53.5wt%, granularity≤3mm of limestone particle.
3. the preparation method of continuous casting tundish coating according to claim 1, it is characterised in that the CaO of the agstone Content>54wt%；Granularity≤88 μm of the agstone.
4. the preparation method of continuous casting tundish coating according to claim 1, it is characterised in that the mangaic acid calcium powder CaMnO3Content >=90wt%, granularity≤88 μm.
5. the preparation method of continuous casting tundish coating according to claim 1, it is characterised in that the sour calcium powder of the cobalt Ca2Co2O5Content >=90wt%, granularity≤88 μm.
6. the preparation method of continuous casting tundish coating according to claim 1, it is characterised in that the ruthenic acid calcium powder CaRuO3Content >=90wt%, granularity≤88 μm.
7. the preparation method of the continuous casting tundish coating according to claim l, it is characterised in that the calcium hydroxide micro mist Particle diameter D90For 30 ~ 40 μm.
8. the preparation method of the continuous casting tundish coating according to claim l, it is characterised in that the calcium chloride is anhydrous Calcium chloride, calcium chloride dihydrate, four water calcium chloride and one kind in calcium chloride hexahydrate are two kinds of mixture.
9. the preparation method of the continuous casting tundish coating according to claim l, it is characterised in that the manganese monoxide powder MnO contents >=99wt%, granularity≤88 μm.
10. a kind of continuous casting tundish coating, it is characterised in that the continuous casting tundish coating is appointed according in claim 1 ~ 9 Continuous casting tundish coating prepared by the preparation method of continuous casting tundish coating described in one.
CN201710345271.4A 2017-05-16 2017-05-16 A kind of continuous casting tundish coating and preparation method thereof Pending CN107129313A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1459345A (en) * 2002-05-21 2003-12-03 北京利尔耐火材料有限公司 New type tundish dry working liner
CN1459342A (en) * 2002-05-24 2003-12-03 北京利尔耐火材料有限公司 Dry type magnesium calcium work-lining for tundish
CN1482094A (en) * 2002-09-12 2004-03-17 武汉科技大学 Hydrated resistant CaO chamotte and method for preparing the same
CN101328071A (en) * 2008-07-31 2008-12-24 武汉科技大学 Magnesia-calcia dry type working liner for tundish and preparation thereof
CN101659562A (en) * 2009-05-26 2010-03-03 梁德安 Amorphous refractory material containing limestone crude ore
CN101717265A (en) * 2009-11-23 2010-06-02 海城市中兴镁质合成材料有限公司 Anti-penetration tundish dry liner
CN103274707A (en) * 2013-06-03 2013-09-04 武汉钢铁(集团)公司 Magnesium-calcium coating for overflow channel of tundish car
CN104177100A (en) * 2014-08-18 2014-12-03 武汉科技大学 Calcium oxide material for clean steel smelting and preparation method thereof
CN104803687A (en) * 2014-01-27 2015-07-29 宝山钢铁股份有限公司 Ultralow silicon coating capable of reducing oxygen content of tundish
CN104926331A (en) * 2015-06-19 2015-09-23 武汉科技大学 Renewable ceramic filter for continuous casting tundish and preparation method thereof
CN104944984A (en) * 2015-06-19 2015-09-30 武汉科技大学 Ceramic filter for continuous casting tundish and method for preparing the same
CN105198461A (en) * 2015-10-14 2015-12-30 武汉科技大学 Continuous casting tundish paint and preparation method thereof

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1459345A (en) * 2002-05-21 2003-12-03 北京利尔耐火材料有限公司 New type tundish dry working liner
CN1459342A (en) * 2002-05-24 2003-12-03 北京利尔耐火材料有限公司 Dry type magnesium calcium work-lining for tundish
CN1482094A (en) * 2002-09-12 2004-03-17 武汉科技大学 Hydrated resistant CaO chamotte and method for preparing the same
CN101328071A (en) * 2008-07-31 2008-12-24 武汉科技大学 Magnesia-calcia dry type working liner for tundish and preparation thereof
CN101659562A (en) * 2009-05-26 2010-03-03 梁德安 Amorphous refractory material containing limestone crude ore
CN101717265A (en) * 2009-11-23 2010-06-02 海城市中兴镁质合成材料有限公司 Anti-penetration tundish dry liner
CN103274707A (en) * 2013-06-03 2013-09-04 武汉钢铁(集团)公司 Magnesium-calcium coating for overflow channel of tundish car
CN104803687A (en) * 2014-01-27 2015-07-29 宝山钢铁股份有限公司 Ultralow silicon coating capable of reducing oxygen content of tundish
CN104177100A (en) * 2014-08-18 2014-12-03 武汉科技大学 Calcium oxide material for clean steel smelting and preparation method thereof
CN104926331A (en) * 2015-06-19 2015-09-23 武汉科技大学 Renewable ceramic filter for continuous casting tundish and preparation method thereof
CN104944984A (en) * 2015-06-19 2015-09-30 武汉科技大学 Ceramic filter for continuous casting tundish and method for preparing the same
CN105198461A (en) * 2015-10-14 2015-12-30 武汉科技大学 Continuous casting tundish paint and preparation method thereof

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Application publication date: 20170905