CN104439045A - Rice hull lost foam alcohol-based casting coating and preparation method thereof - Google Patents
Rice hull lost foam alcohol-based casting coating and preparation method thereof Download PDFInfo
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- CN104439045A CN104439045A CN201410622794.5A CN201410622794A CN104439045A CN 104439045 A CN104439045 A CN 104439045A CN 201410622794 A CN201410622794 A CN 201410622794A CN 104439045 A CN104439045 A CN 104439045A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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Abstract
The invention relates to a rice hull lost foam alcohol-based casting coating. The rice hull lost foam alcohol-based casting coating is characterized by being prepared from the following raw materials in parts by weight: 20-25 parts of limestone, 65-70 parts of magnesium-aluminum spinelle, 2-3 parts of waste coal cinder powder, 0.3-0.6 part of calcium chloride, 7-10 parts of coal gangue, 0.5-0.9 part of triphenyl phosphate, 0.3-0.6 part of methyl triethoxysilane, 0.7-2.1 parts of carnauba wax, 7-10 parts of rice hull, 3-4 parts of phenolic resin, 1-4 parts of hexamethylenetetramine, 40-55 pats of ethanol and 3-6 parts of an aid. By adding the rice hull, the waste coal cinder powder and the like, the rice hull lost foam alcohol-based casting coating has good suspension property, thixotropy, high-temperature resistance and gas permeability and relatively high surface strength; a preparation process of the rice hull lost foam alcohol-based casting coating is simple, the operation is convenient and the production cost is low.
Description
Technical field
The present invention relates to cast paint field, be specifically related to a kind of rice hulls evaporative pattern alcohol-base foundry coating and preparation method thereof.
Background technology
Cast paint refers to for being coated in die cavity or core surface, to change the casting auxiliary material of the performances such as its surperficial refractoriness, chemical stability, anti-metal erosion, anti-stick grittiness, the disperse system that it is made up of the material of multiple different in kind, its composition mainly comprises the compositions such as refractory material, suspending agent, carrier, binding agent and special additive.Require that coating has good processing performance, service behaviour, quality stability and applies reappearance when acting on foundry goods, can play heat insulation on the one hand, equalization temperature, exempt the object of the impingment corrosion of molten metal, the defect such as cracking, sand holes, white iron formation that can prevent cast product from causing because Local cooling is too fast on the other hand.Cast paint is of a great variety, substantially can be divided into two classes: water based paint and alcohol-base paint.Wherein alcohol-base paint is both curable through lighting after application, does not need to dry, and can shorten the production cycle, Simplified flowsheet, reduces drying plant investment, is be cast a kind of quick drying paint that boundary widely uses, has been widely used in the production of steel, iron, coloured foundry goods.
But alcohol-base foundry coating has many defects in prior art, such as: suspension stability is poor, in long-distance transport and deposit easy layering in process, resistance to elevated temperatures is poor, hardness is low, low, the anti-stick grittiness of poor chemical stability, anti-metal performance of flushing is weak, make alcohol-base foundry coating function singleness, cannot large-scale industrial production be met.
Summary of the invention
Object of the present invention is just to provide a kind of rice hulls evaporative pattern alcohol-base foundry coating and preparation method thereof, to overcome the deficiencies in the prior art.
The object of the present invention is achieved like this:
A kind of rice hulls evaporative pattern alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: lime stone 20-25, magnesium aluminate spinel 65-70, waste coal ground-slag 2-3, calcium chloride 0.3-0.6, gangue 7-10, triphenyl phosphate 0.5-0.9, MTES 0.3-0.6, Brazil wax 0.7-2.1, rice hulls 7-10, phenolic resins 3-4, hexa 1-4, ethanol 40-55, auxiliary agent 3-6.
Described auxiliary agent is made up of following raw materials in part by weight: shell 20-25, sepiolite 35-45, zircon 55-75, Silane coupling reagent KH-570 1.4-4.6, dimethicone 0.4-0.7, ferrocene 1.2-3.2, brown iron oxide 2-5, coal tar 3-5, calcium lignosulfonate 0.3-0.6, nano carborundum powder 0.1-0.3, calcium carbonate 2.3-4.7, polyvinyl alcohol 5-7, suitable quantity of water, its preparation method is by shell, sepiolite, zircon is put into calcining furnace and calcine 2-3 hour at 550-680 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add brown iron oxide, calcium lignosulfonate grinds, spraying dry obtains xeraphium, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, adds nano carborundum powder, coal tar, calcium carbonate continuation stirring 10-20 minute, obtained slurry, by above-mentioned obtained xeraphium and slurry mix and blend 20-40 minute, then add other residual components and to add water grinding granulation, dry and get final product.
The preparation method of described a kind of rice hulls evaporative pattern alcohol-base foundry coating, is characterized in that comprising the following steps:
(1) put into retort calcination processing 3-4 hour at 450-550 DEG C after rice hulls being dried, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes;
(2) product above-mentioned steps obtained grinds and is heated to 140-160 DEG C together with the ethanol of gangue, 1/4 weight, add triphenyl phosphate, Brazil wax maintenance temperature stirs 1-2 hour, be cooled to 50-60 DEG C and add calcium chloride grinding 30-40 minute, spraying dry obtains xeraphium;
(3) ethanol of waste coal ground-slag and 1/5 weight is stirred, leave standstill 10-12 hour, then add MTES, phenolic resins, hexa be heated to 70-80 DEG C and stir 30-40 minute;
(4) magnesium aluminate spinel is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of lime stone and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.
The present invention has following beneficial effect: coating of the present invention, adds rice hulls, waste coal ground-slag etc., has good suspension, thixotropy and resistance to elevated temperatures, also have good gas permeability and higher surface strength; Preparation technology of the present invention is simple, easy to operate, production cost is low.
Detailed description of the invention
Described a kind of rice hulls evaporative pattern alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: lime stone 23, magnesium aluminate spinel 67, waste coal ground-slag 2, calcium chloride 0.3, gangue 7, triphenyl phosphate 0.5, MTES 0.3, Brazil wax 1.7, rice hulls 7, phenolic resins 3, hexa 1, ethanol 45, auxiliary agent 3.
Described auxiliary agent is made up of following raw materials in part by weight: shell 23, sepiolite 39, zircon 57, Silane coupling reagent KH-570 3.4, dimethicone 0.4, ferrocene 3.2, brown iron oxide 2, coal tar 3, calcium lignosulfonate 0.3, nano carborundum powder 0.3, calcium carbonate 2.3, polyvinyl alcohol 5, suitable quantity of water, its preparation method is by shell, sepiolite, zircon is put into calcining furnace and calcine 2-3 hour at 550-680 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add brown iron oxide, calcium lignosulfonate grinds, spraying dry obtains xeraphium, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, adds nano carborundum powder, coal tar, calcium carbonate continuation stirring 10-20 minute, obtained slurry, by above-mentioned obtained xeraphium and slurry mix and blend 20-40 minute, then add other residual components and to add water grinding granulation, dry and get final product.
Preparation method comprises the following steps:
(1) put into retort calcination processing 3-4 hour at 450-550 DEG C after rice hulls being dried, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes;
(2) product above-mentioned steps obtained grinds and is heated to 140-160 DEG C together with the ethanol of gangue, 1/4 weight, add triphenyl phosphate, Brazil wax maintenance temperature stirs 1-2 hour, be cooled to 50-60 DEG C and add calcium chloride grinding 30-40 minute, spraying dry obtains xeraphium;
(3) ethanol of waste coal ground-slag and 1/5 weight is stirred, leave standstill 10-12 hour, then add MTES, phenolic resins, hexa be heated to 70-80 DEG C and stir 30-40 minute;
(4) magnesium aluminate spinel is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of lime stone and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.
The technical indicator of being processed the cast paint obtained by above-described embodiment is as follows:
(1) solid content: 34.24%;
(2) coating abrasion performance: 0.721;
(3) 24 hours coating suspension rates are placed: 97.98%;
(4) coating density: 1.72g/cm
3;
(5) the normal temperature gas permeability of coating: 13cm
2(kpamin)
-1;
(6) apply, dry, appearance of coat after cooling: flawless, without bubbling and the uniform coating of macroscopic pin hole.
Claims (2)
1. a rice hulls evaporative pattern alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: lime stone 20-25, magnesium aluminate spinel 65-70, waste coal ground-slag 2-3, calcium chloride 0.3-0.6, gangue 7-10, triphenyl phosphate 0.5-0.9, MTES 0.3-0.6, Brazil wax 0.7-2.1, rice hulls 7-10, phenolic resins 3-4, hexa 1-4, ethanol 40-55, auxiliary agent 3-6, described auxiliary agent is made up of following raw materials in part by weight: shell 20-25, sepiolite 35-45, zircon 55-75, Silane coupling reagent KH-570 1.4-4.6, dimethicone 0.4-0.7, ferrocene 1.2-3.2, brown iron oxide 2-5, coal tar 3-5, calcium lignosulfonate 0.3-0.6, nano carborundum powder 0.1-0.3, calcium carbonate 2.3-4.7, polyvinyl alcohol 5-7, suitable quantity of water, its preparation method is by shell, sepiolite, zircon is put into calcining furnace and calcine 2-3 hour at 550-680 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add brown iron oxide, calcium lignosulfonate grinds, spraying dry obtains xeraphium, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, adds nano carborundum powder, coal tar, calcium carbonate continuation stirring 10-20 minute, obtained slurry, by above-mentioned obtained xeraphium and slurry mix and blend 20-40 minute, then add other residual components and to add water grinding granulation, dry and get final product.
2. the preparation method of a kind of rice hulls evaporative pattern alcohol-base foundry coating according to claim 1, is characterized in that comprising the following steps:
(1) put into retort calcination processing 3-4 hour at 450-550 DEG C after rice hulls being dried, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes;
(2) product above-mentioned steps obtained grinds and is heated to 140-160 DEG C together with the ethanol of gangue, 1/4 weight, add triphenyl phosphate, Brazil wax maintenance temperature stirs 1-2 hour, be cooled to 50-60 DEG C and add calcium chloride grinding 30-40 minute, spraying dry obtains xeraphium;
(3) ethanol of waste coal ground-slag and 1/5 weight is stirred, leave standstill 10-12 hour, then add MTES, phenolic resins, hexa be heated to 70-80 DEG C and stir 30-40 minute;
(4) magnesium aluminate spinel is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of lime stone and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410622794.5A CN104439045A (en) | 2014-11-08 | 2014-11-08 | Rice hull lost foam alcohol-based casting coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410622794.5A CN104439045A (en) | 2014-11-08 | 2014-11-08 | Rice hull lost foam alcohol-based casting coating and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999026A (en) * | 2015-07-30 | 2015-10-28 | 张燕 | Corundum slag-heat-engine plant pulverized fuel ash evaporative pattern casting coating and preparation method thereof |
| CN105170883A (en) * | 2015-07-30 | 2015-12-23 | 张燕 | Corundum residue-aluminum profile factory industrial sludge lost foam casting coating and preparing method thereof |
| CN105234344A (en) * | 2015-10-30 | 2016-01-13 | 高要市鸿兴精密铸造有限公司 | Cooling coating special for lost foam casting and preparation method of cooling coating |
| CN107052243A (en) * | 2016-12-28 | 2017-08-18 | 桃江新兴管件有限责任公司 | A kind of cast iron lost foam casting process |
| CN110157283A (en) * | 2019-05-30 | 2019-08-23 | 曾祥民 | A kind of preparation method of water-proof fire-proof paint |
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| CN101195146A (en) * | 2007-12-19 | 2008-06-11 | 济南圣泉集团股份有限公司 | Coal ash casting paint |
| CN101602087A (en) * | 2009-07-13 | 2009-12-16 | 西安建筑科技大学 | A kind of lost foam aluminum casting coating prepared by flyash and preparation method thereof |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
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| CN102962396A (en) * | 2012-11-23 | 2013-03-13 | 湖北省潜江市民福化工机械有限公司 | Casting-purposed high-strength environmental-friendly water-based evanescent mode coating and preparation method thereof |
| CN103100651A (en) * | 2012-12-11 | 2013-05-15 | 芜湖恒坤汽车部件有限公司 | Method for preparing solid-mold casting coating material for large-sized cast parts |
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2014
- 2014-11-08 CN CN201410622794.5A patent/CN104439045A/en active Pending
Patent Citations (8)
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| JPH04371349A (en) * | 1991-06-20 | 1992-12-24 | Kao Corp | Mold coating material composition for casting |
| RU2221669C2 (en) * | 2001-10-08 | 2004-01-20 | ГОУ Уральский государственный технический университет | Self-drying parting paint |
| CN101195146A (en) * | 2007-12-19 | 2008-06-11 | 济南圣泉集团股份有限公司 | Coal ash casting paint |
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| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
| CN102500745A (en) * | 2011-11-29 | 2012-06-20 | 朱小英 | Method for preparing full-mold casting coating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999026A (en) * | 2015-07-30 | 2015-10-28 | 张燕 | Corundum slag-heat-engine plant pulverized fuel ash evaporative pattern casting coating and preparation method thereof |
| CN105170883A (en) * | 2015-07-30 | 2015-12-23 | 张燕 | Corundum residue-aluminum profile factory industrial sludge lost foam casting coating and preparing method thereof |
| CN105234344A (en) * | 2015-10-30 | 2016-01-13 | 高要市鸿兴精密铸造有限公司 | Cooling coating special for lost foam casting and preparation method of cooling coating |
| CN107052243A (en) * | 2016-12-28 | 2017-08-18 | 桃江新兴管件有限责任公司 | A kind of cast iron lost foam casting process |
| CN107052243B (en) * | 2016-12-28 | 2019-02-15 | 桃江新兴管件有限责任公司 | A kind of cast iron lost foam casting process |
| CN110157283A (en) * | 2019-05-30 | 2019-08-23 | 曾祥民 | A kind of preparation method of water-proof fire-proof paint |
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Application publication date: 20150325 |