CN103551496B - Anhydrous water-base forsterite powder paint - Google Patents

Anhydrous water-base forsterite powder paint Download PDF

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CN103551496B
CN103551496B CN201310522729.0A CN201310522729A CN103551496B CN 103551496 B CN103551496 B CN 103551496B CN 201310522729 A CN201310522729 A CN 201310522729A CN 103551496 B CN103551496 B CN 103551496B
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powder
forsterite
forsterite powder
coating
temperature
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CN103551496A (en
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陈志芳
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Xinjiang Shiquan Gold Mining Co.,Ltd.
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Xinjiang Hua Sha Energy Co Ltd
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Abstract

The invention provides a kind of anhydrous water-base forsterite powder paint, comprise the raw material of following parts by weight: forsterite powder 70-100 part, binding agent 2-10 part, suspending agent 5-10 part, wherein the granularity of forsterite powder is all no more than 100 μm.The invention still further relates to the preparation method of this anhydrous water-base forsterite powder paint.

Description

Anhydrous water-base forsterite powder paint
Technical field
The present invention relates to a kind of Novel anhydrous water-base forsterite powder paint.
Background technology
Mold wash solves scab, improves surface quality of continuous castings effective measures the most.Mold wash conventional is at present divided into two large classes by its solvent used difference: alcohol-base paint and water based paint.The alcohol-base paint overwhelming majority supplies with the form of pulpous state, and its carrier fluid, primarily of compositions such as ethanol, methyl alcohol, isopropyl alcohols, belongs to flammability hazard product, is subject to all multiple constraints, causes cost higher in packaging, transport, storage etc.; Meanwhile, because the suspension stability of alcohol-base paint is poor, coating is in long-distance transport and deposit easy layering in process, and its processing performance is declined, and serious makes coating generation deposited phenomenon, exist storage period shorter, not easily from bucket, the shortcoming such as to pour out.Current way is, is first mixed with powdery semi-finished product coating by coating material production factory, Foundry Works again with ethanol allotment dilution, matching while using, very convenient, avoid haul-cycle time short problem, transport by general cargo again with woven bag packing dry powder coating.
But alcohol radical mold wash discharges poisonous, pernicious gas in ignition dry run, severe contamination air, this is the reason of the material such as volatile organic solvent and a certain amount of organic adhesive, auxiliary agent and anticorrisive agent owing to wherein containing.At present, along with when processing factory operates coating, the requirement of the health and safety of operating personnel increases, and also improves requirement to the VOC that mold wash in use discharges.Comprehensive above-mentioned consideration, the development prospect of water based paint is comparatively good.
Cast paint is generally made up of refractory aggregate, solvent, binding agent, suspending agent and additives etc.Wherein refractory aggregate is the main part of coating, and its process based prediction model determines the anti-burnon effect of coating.Magnesium refractory material chemical property is relatively stable, has good resistivity to slag, can improve the erosion-resisting characteristics of product, and more than 1000 DEG C after expand small, and speed of expansion is slowly even, and when high temperature is cast, coating not easily cracks.For solvent, if water based paint uses using slurries or cream form as finished product, face the defect of packing cost and transport inconvenience equally, simultaneously medium-term and long-term immersions of organic matter water in the feed can fermentation phenomenon generation, thus produce small bubble, affect the result of use of final coating.
Therefore, the factor of comprehensive above-mentioned several aspect, anhydrous water-base powder-type coating is a comparatively good developing direction.
Forsterite Mg 2siO 4, be called for short M 2s is MgO-SiO 2the refractory material of the molecular structure of heat endurance the best in series, suddenlys change mutually without any in from room temperature to melting process, thus strong, the high temperature deformation resistance of coating splitting resistance and anti-suddenly cold and hot good, pure Mg 2siO 4material, refractoriness is at 1700-1900 oc, high temperature deformation temperature 1650-1750 DEG C.
CN1748900A discloses a kind of anhydrous water-base forsterite powder paint, comprises following component: with parts by weight, forsterite powder 89-91 part, white glue with vinyl 3.5-5.5 part, suspending agent 3.0-3.5 part, dextrin 2.0-2.5 part, sodium carboxymethylcellulose 0.15-2.5 part.Grind 1-1.5 hour by after above-mentioned formula mixing of materials, obtain product until granularity when 200-270 object material content is greater than 95%.During use, add the running water of coating gross weight 50-80%, stir and within 20 minutes, become water based paint cream for subsequent use.It adopts lithium bentonite and sodium carboxymethylcellulose as composite suspension agent, utilizes sodium carboxymethylcellulose to the bridge linking effect of bentonite clay particle, makes coating form space network, improves the suspension stability of coating, thixotropy and yield value significantly.And high-temperature calcination is carried out to forsterite, rejects the volatilize impurities in ore.
CN101117464A discloses a kind of white olivine tundish fireproof coating and preparation method thereof, the well as clay fines of the magnesia powder of the forsterite grog of the forsterite sand of 20-50wt%, 25-55wt%, 15-30wt%, 5-15wt% calcium magnesite fine powder and 1-5wt% is mixed, the sodium phosphate trimer of the organic fiber of additional 0-0.5wt%, the calgon of 0.5-2.0wt% and 0.3-1.0wt%, mix through mixer, bag distribution packaging, add water during use stirring.Wherein add organic fiber and can ensure that it does not burst in bake process, adopt sodium phosphate as high-temperature agglomerant, it at high temperature forms nethike embrane and encases aggregate securely, makes coating have good elevated temperature strength.
CN102653640A discloses a kind of forsterite modified powdery coating and preparation method thereof, comprise the raw material of following parts by weight: forsterite powder 2-16, mullite powder 10-32, zirconium English powder 10-26, silica flour 15-30, lithium bentonite 3-5, dextrine powder 1.5-3.5, Virgin's milk rubber powder 1-3, sodium carboxymethylcellulose powder 2-4.Wherein by adding neutral mullite, zirconium English powder, modification is carried out to forsterite, it is neutral for making during its coating high temperature, can not only be applicable to alkaline high-alloy steel, also be applicable to acid low-alloy steel, iron castings is produced, and it is good to retain forsterite solid phase self sintering, make it prevent steel, molten iron good penetrability, during casting cleaning, coating is sheet, bulk peels off, and improves foundry goods apparent mass level.
CN101508586A discloses a kind of continuous casting production working lining coating, its chemical composition is counted by weight: forsterite raw material 50-90 part, magnesia 10-50 part, compound additive 3-5 part, wherein compound additive is at least one in organic fiber, paper fiber, lime, sodium phosphate trimer, calgon, clay or silicate.Wherein add lime and can ensure that it can become dry in the short period of time after smearing, reduce the natural drying time, the situation of smearing also is improved simultaneously.In the forsterite raw material of wherein granularity≤5mm, the percentage by weight of each particle size range is: 5-3mm accounts for 20-30%, 3-1mm accounts for 25-35%, 1-0.088mm account for 25-35%, <0.088mm accounts for 0-30%, and in the magnesia of granularity≤1mm, the percentage by weight of each particle size range is: 1-0.088mm accounts for 0-35%, <0.088mm accounts for 65-100%, can strengthen the erosion-resisting characteristics of goods so further.
But the main target of mold wash technical development realizes that foundry goods is refined, energy-conservation cost is low.When changing the basic composition of coating, not only to improve coating efficiency and the coating quality of coating, realize spray to refine, also will consider processing cost, along with the rise in price of raw material and the change of Iron & Steel Development situation, the profit margin of coating is progressively reducing, therefore, reduce expenses as far as possible, larger market development space could be obtained, need to develop new low cost coating.
Summary of the invention
Technical problem to be solved by this invention is to provide one and can realizes foundry goods and refine, again can cost-effective anhydrous water-base forsterite powder paint and preparation method thereof.
The technical solution adopted in the present invention is: a kind of anhydrous water-base forsterite powder paint, comprises the raw material of following parts by weight: forsterite powder 70-100 part, binding agent 2-10 part, suspending agent 5-10 part.
Described suspending agent is one or both in bentonite, palygorskite, carboxymethyl cellulose (CMC) or sodium carboxymethylcellulose; Wherein bentonite is preferably sodium bentonite or lithium bentonite.Because palygorskite mineral exquisiteness is closely knit, extraordinary effect can be played in this, as suspending agent, improve strength of coating, therefore preferably use palygorskite.
Consider from the angle improving strength of coating, the application finds through great many of experiments, and adding a certain amount of hollow glass micropearl obviously can improve strength of coating.Experiment finds, relative to 100 parts, forsterite powder, the effect adding the hollow glass micropearl of 5-10 part is best.Then intensity raising is not obvious lower than 5 parts for addition; Addition higher than 10 weight portions then intensity have part downward trend.
Further, can significantly improve strength of coating by adding high-temperature-resistant inorganic fibre, experiment finds, relative to 100 parts, forsterite powder, the high-temperature-resistant inorganic fibre effect adding 0.01-0.1 part is best.Then intensity raising is not obvious lower than 0.01 part for addition; Addition higher than 0.1 weight portion then intensity almost do not improve further.Described high-temperature-resistant inorganic fibre can be high silica high-temperature-resistant inorganic fibre.
Described binding agent is one or more in sodium phosphate, sodium phosphate trimer or calgon.
The granularity of described forsterite powder is all no more than 100 μm, and preferably, the percentage by weight of each particle size range is: 50-100 μm account for 20-50%, <1 μm account for 5-15%, 1-50 μm account for 35-65%.Experiment finds, the granularity of forsterite powder is reduced to less than 100 μm, effectively can strengthen the erosion-resisting characteristics of goods, preferably, compared with using the forsterite powder of single particle size scope, the collaborative erosion-resisting characteristics strengthening goods can be reached by the mixture of the forsterite powder using micro-nano different-grain diameter.
Described forsterite powder preparation can select dunite first through water-washing pre-treatment, then through kiln 1350-1450 oc high-temperature calcination, removes the volatilize impurities in ore, solidifying refinement, MgO>=45%, and burn vector≤0.5%.
The preparation method of described anhydrous water-base forsterite powder paint, according to proportioning by grinding 1-2 hour after binding agent and suspending agent mixing, obtains compound A; Forsterite powder is ground to form in advance the powder of different-grain diameter; Then stir 1-2 hour after varigrained forsterite powder and compound A being mixed by above-mentioned formula, make each component material reach high uniformity dispersion, obtain this product.
Preferably, binding agent and suspending agent grinding obtain the compound A that particle diameter is no more than 100 μm.
During use, convert 200-400ml water by 1Kg coating.
The present invention compared with prior art has the following advantages:
1, cost is low.The component adopted is convenient source, and does not need to add magnesia and other mineral stone part, compared with existing products in markets, has the advantage of cost.
2, effective.The forsterite powder of different-grain diameter scope uses together, reaches coating and does not ftracture, and cast(ing) surface refinement degree is high, coating flaky technique effect during casting cleaning.With falling, ball formula intensity measuring device is measured, and strength of coating is 80g/mm 2above.
3, after tested, owing to not containing volatile organic matter in this products material, the reduction more obvious than existing product of VOC content during processing in working environment.
Table 1 section Example of the present invention and comparative example:
Embodiment 1:
Raw material prepare: the preparation of forsterite powder selects dunite first through water-washing pre-treatment, then through kiln 1400 oc high-temperature calcination, removes the volatilize impurities in ore, solidifying refinement, MgO>=45%, and burn vector≤0.5%.
By grinding after the sodium phosphate of binding agent 6 weight portion and suspending agent (sodium bentonite of 4 weight portions and the CMC of 4 weight portions) mixing, obtain the compound A that particle diameter is no more than 100 μm; Forsterite powder is ground to form in advance the powder of different-grain diameter; Then above-mentioned formula is pressed by varigrained forsterite powder (50-100 μm: 35 weight portions, <1 μm: 10 weight portions, 1-50 μm: 55 weight portions) and compound A mix after stir 1.5 hours, make each component material reach high uniformity dispersion, obtain this product powder-type coating.
During use, convert 300ml water by 1Kg coating.
Embodiment 2:
The granularity of forsterite powder is 50-100 μm: 55 weight portions, <1 μm: 10 weight portions, and 1-50 μm: 35 weight portions, other is identical with embodiment 1.
Embodiment 3:
The granularity of forsterite powder is 50-100 μm: 15 weight portions, <1 μm: 15 weight portions, and 1-50 μm: 70 weight portions, other is identical with embodiment 1.
Embodiment 4:
The granularity of forsterite powder is 50-100 μm: 100 weight portions, and other is identical with embodiment 1.
Embodiment 5:
The granularity of forsterite powder is 1-50 μm: 100 weight portions, and other is identical with embodiment 1.
Embodiment 6:
The granularity of forsterite powder is <1 μm: 100 weight portions, and other is identical with embodiment 1.
Comparative example 1:
The granularity of forsterite powder is >100 μm: 100 weight portions, and other is identical with embodiment 1.
Comparative example 2:
The granularity of forsterite powder is >100 μm: 50 weight portions, and 50-100 μm: 50 weight portions, other is identical with embodiment 1.
Embodiment 7:
Forsterite is without washing process, and directly carry out high-temperature calcination, other is identical with embodiment 1.
Embodiment 8:
Grind 1.5 hours after binding agent and suspending agent mixing, particle diameter is about 500 μm, and other is identical with embodiment 1.Found that, final strength of coating is 85 g/mm 2.
Embodiment 9:
Use the palygorskite of 4 weight portions, the sodium bentonite of 4 weight portions in alternative embodiment 1.Other is identical with embodiment 1.Found that, final strength of coating is 108 g/mm 2.
Embodiment 10:
Also add the hollow glass micropearl of 5 weight portions, other is identical with embodiment 1.Found that, final strength of coating is 100 g/mm 2.
Embodiment 11:
Add the hollow glass micropearl of 3 weight portions, other is identical with embodiment 12.Found that, final strength of coating is 97 g/mm 2.
Embodiment 12:
Add the hollow glass micropearl of 15 weight portions, other is identical with embodiment 12.Found that, final strength of coating is 91 g/mm 2.
Embodiment 13:
Also add the high silica high-temperature-resistant inorganic fibre of 0.01 weight portion, other is identical with embodiment 1.Found that, final strength of coating is 110 g/mm 2.
Embodiment 14:
While adding palygorskite, also add the high silica high-temperature-resistant inorganic fibre of 0.2 weight portion, other is identical with embodiment 9.Found that, final strength of coating is 117 g/mm 2.
Embodiment 15:
Also add the high silica high-temperature-resistant inorganic fibre of 0.005 weight portion, other is identical with embodiment 13.Found that, final strength of coating is 97 g/mm 2.
Embodiment 16
Other condition is identical in embodiment 14, and difference is not use palygorskite.Found that, final strength of coating is 87 g/mm 2.
Concrete technical scheme is in table 1.
More visible by embodiment 1-7 and comparative example 1-2, the granularity selection of forsterite powder has material impact to the strength of coating after final coating film forming, and the strength of coating of employing technical solution of the present invention will significantly better than the strength of coating of the coating of use prior art.
Visible with comparing of embodiment 4-6 by embodiment 1-3, use the technique effect of three kinds of varigrained forsterite powder obviously will be better than using the forsterite powder of single particle size scope.Further, relatively more visible by embodiment 1-3, the percentage by weight of each particle size range is: 50-100 μm account for 20-50%, <1 μm account for 5-15%, 1-50 μm account for 35-65% time technique effect best.
In addition, the pretreatment of forsterite also has certain influence to the effect of final products, relatively more visible by embodiment 1 and 7, is better than the product without water-washing pre-treatment through the strength of coating of the product of water-washing pre-treatment gained.
Embodiment 1 is visible with comparing of embodiment 8, and the particle diameter of binding agent and the rear grinding of suspending agent mixing is little on the impact of strength of coating, all can meet the demands.
Embodiment 1 is visible with comparing of embodiment 9, selects palygorskite to significantly improve strength of coating.
Embodiment 1 is visible with comparing of embodiment 10-12, and the hollow glass micropearl adding a certain amount of (the forsterite powder relative to 100 parts is 5-10 part) can significantly improve strength of coating.
Embodiment 1 is visible with comparing of embodiment 13-15, and adding a certain amount of high-temperature-resistant inorganic fibre can significantly improve strength of coating.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. an anhydrous water-base forsterite powder paint, comprise the raw material of following parts by weight: forsterite powder 70-100 part, binding agent 2-10 part, suspending agent 5-10 part, wherein said suspending agent is palygorskite, and the granularity of described forsterite powder is no more than 100 μm, particularly, the percentage by weight of each particle size range of forsterite powder is: 50-100 μm account for 20-50%, <1 μm account for 5-15%, 1-50 μm account for 35-65%.
2. powder-type coating according to claim 1, is characterized in that: described binding agent is one or more in sodium phosphate, sodium phosphate trimer or calgon.
3. powder-type coating according to claim 1, is characterized in that: described forsterite powder preparation selects dunite first through water-washing pre-treatment, then through kiln 1350-1450 oc high-temperature calcination, removes the volatilize impurities in ore.
4. powder-type coating according to claim 1, is characterized in that: also containing a certain amount of hollow glass micropearl, the forsterite powder of its consumption relative to 100 parts is 5-10 part.
5. powder-type coating according to claim 1, is characterized in that: relative to 100 parts, forsterite powder, also add the high-temperature-resistant inorganic fibre of 0.01-0.1 part.
6. powder-type coating according to claim 5, is characterized in that: described high-temperature-resistant inorganic fibre is silica high-temperature-resistant inorganic fibre.
7. a preparation method for anhydrous water-base forsterite powder paint as claimed in claim 1, according to proportioning by grinding 1-2 hour after binding agent and suspending agent mixing, obtains compound A; Forsterite powder is ground to form in advance the powder of different-grain diameter; Then stir 1-2 hour after varigrained forsterite powder and compound A being mixed in proportion, make each component material reach high uniformity dispersion, obtain this product.
8. preparation method according to claim 7, is characterized in that: also add silica high-temperature-resistant inorganic fibre by while binding agent and suspending agent mixing.
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CN104119084B (en) * 2014-07-02 2016-04-20 武汉钢铁(集团)公司 Continuous casting steel machine liner in dundish coating
CN105344932A (en) * 2015-12-11 2016-02-24 攀枝花钢城集团有限公司 Lost foam coating and production method thereof
CN107235737A (en) * 2017-06-30 2017-10-10 长兴泓矿炉料有限公司 A kind of forsterite fireproof coating and preparation method thereof
CN107866520B (en) * 2017-11-15 2020-04-07 共享智能装备有限公司 Anhydrous water-soluble powder casting coating and preparation method thereof

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CN1109678A (en) * 1993-05-17 1995-10-04 胡坦斯·阿尔伯图斯化学厂有限公司 Black wash for producing mould coatings
CN1748900A (en) * 2005-10-28 2006-03-22 高申明 Anhydrous water-base forsterite powder paint
CN101293270A (en) * 2008-06-18 2008-10-29 北京交通大学 High melting metal liquid die forging paint, producing and using method thereof
CN102397983A (en) * 2011-11-29 2012-04-04 朱小英 Full mold casing coating
CN103042168A (en) * 2012-12-30 2013-04-17 安岳县金龙机械制造有限公司 Lost foam casting coating and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU394153A1 (en) * 1970-10-15 1973-08-22 Всесоюзный научно исследовательский, проектно технологическнй институт горного машиностроени , Уральский политехнический институт С. М. Кирова Anti-grunt coating for casting forms
CN1109678A (en) * 1993-05-17 1995-10-04 胡坦斯·阿尔伯图斯化学厂有限公司 Black wash for producing mould coatings
CN1748900A (en) * 2005-10-28 2006-03-22 高申明 Anhydrous water-base forsterite powder paint
CN101293270A (en) * 2008-06-18 2008-10-29 北京交通大学 High melting metal liquid die forging paint, producing and using method thereof
CN102397983A (en) * 2011-11-29 2012-04-04 朱小英 Full mold casing coating
CN103042168A (en) * 2012-12-30 2013-04-17 安岳县金龙机械制造有限公司 Lost foam casting coating and preparation method thereof

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