CN104014724B - A kind of alcohol-base foundry coating with wearability and preparation method thereof - Google Patents
A kind of alcohol-base foundry coating with wearability and preparation method thereof Download PDFInfo
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- CN104014724B CN104014724B CN201410194502.2A CN201410194502A CN104014724B CN 104014724 B CN104014724 B CN 104014724B CN 201410194502 A CN201410194502 A CN 201410194502A CN 104014724 B CN104014724 B CN 104014724B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 14
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920002472 Starch Polymers 0.000 claims abstract description 13
- 239000008107 starch Substances 0.000 claims abstract description 13
- 235000019698 starch Nutrition 0.000 claims abstract description 13
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 8
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 claims abstract description 8
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 7
- 239000000440 bentonite Substances 0.000 claims abstract description 7
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims abstract description 7
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 7
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 7
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 7
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 7
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 7
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 6
- 239000005011 phenolic resin Substances 0.000 claims abstract description 4
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 7
- 241000276489 Merlangius merlangus Species 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 235000001287 Guettarda speciosa Nutrition 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 150000003376 silicon Chemical class 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims description 2
- 244000061520 Angelica archangelica Species 0.000 claims 2
- 239000007921 spray Substances 0.000 claims 1
- 239000000725 suspension Substances 0.000 abstract description 4
- 239000002244 precipitate Substances 0.000 abstract description 2
- 239000003973 paint Substances 0.000 description 8
- 241000125175 Angelica Species 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- -1 carrier Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- AQLLBJAXUCIJSR-UHFFFAOYSA-N OC(=O)C[Na] Chemical compound OC(=O)C[Na] AQLLBJAXUCIJSR-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001037 White iron Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- IZZOKZMGQDMCAE-XQZFLANJSA-N alpha-L-Rhap-(1->2)-[beta-D-GlcpNAc-(1->3)]-alpha-L-Rhap-(1->3)-alpha-L-Rhap-(1->2)-[beta-D-GlcpNAc-(1->3)]-alpha-L-Rhap Chemical compound O[C@@H]1[C@H](O)[C@@H](O)[C@H](C)O[C@H]1O[C@@H]1[C@H](O[C@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](O)[C@H](C)O[C@H]1O[C@H]1[C@@H](O)[C@H](O[C@@H]2[C@@H]([C@@H](O)[C@H](C)O[C@H]2O)O[C@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)NC(C)=O)O[C@@H](C)[C@@H]1O IZZOKZMGQDMCAE-XQZFLANJSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
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- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of alcohol-base foundry coating with wearability, it is characterized in that, made by the raw material of following weight portion: yellow starch gum 1.2-3.4, magnesium chloride 0.4-0.7, lithium bentonite 1-2, kaolin 45-60, zircon 30-40, sodium carboxymethylcellulose 2-3, zinc dithiophosphate 0.2-0.4, triphenyl phosphite 0.6-1.2, white glue with vinyl 0.7-1.3, shell 9-13, phenolic resins 3-5, hexa 2-4, ethanol 45-60, auxiliary agent 3-6; The coating that the present invention makes has that wearability is good, suspension is good, surface smoothness good, does not precipitate, does not lump, good fluidity, anti-stick grittiness are strong and the feature of good stability, has a extensive future.
Description
Technical field
The present invention relates to cast paint field, be specifically related to a kind of alcohol-base foundry coating and system thereof with wearabilityMake method.
Background technology
Cast paint refers to for being coated in die cavity or core surface, to change its surperficial refractoriness, chemically stableThe casting auxiliary material of the performances such as property, anti-metal erosion, anti-stick grittiness, it is the material by multiple different in kindThe disperse system of material composition, its composition mainly comprises refractory material, suspending agent, carrier, binding agent and special interpolationThe compositions such as agent. While acting on foundry goods, require coating have good processing performance, service behaviour, quality stability withAnd applying reappearance, one side can play heat insulation, equalization temperature, the order of the impingment corrosion of release molten metal, can prevent on the other hand cracking, sand holes, white iron shape that cast product causes because Local cooling is too fastThe defects such as one-tenth. Cast paint is of a great variety, substantially can be divided into two classes: water based paint and alcohol-base paint. WhereinAlcohol-base paint is both curable through lighting after coating, does not need to dry, and can shorten the production cycle, simplifies technique, subtractsFew drying plant investment, is to be cast a kind of quick drying paint that boundary is widely used, be widely used in steel, iron,In the production of coloured foundry goods.
But alcohol-base foundry coating has many defects in prior art, such as: suspension stability is poor, long-distanceTransport and deposit in process easily layering, resistance to elevated temperatures is poor, hardness is low, poor chemical stability, the punching of anti-metalLow, the anti-stick grittiness of brush performance is weak etc., makes alcohol-base foundry coating function singleness, cannot meet large-scale industryChange and produce.
Summary of the invention
Object of the present invention is just to provide a kind of alcohol-base foundry coating with wearability and preparation method thereof, with gramTake the deficiencies in the prior art.
The object of the present invention is achieved like this:
An alcohol-base foundry coating with wearability, is characterized in that, is made up of the raw material of following weight portion:Yellow starch gum 1.2-3.4, magnesium chloride 0.4-0.7, lithium bentonite 1-2, kaolin 45-60, zircon 30-40,Sodium carboxymethylcellulose 2-3, zinc dithiophosphate 0.2-0.4, triphenyl phosphite 0.6-1.2, white glue with vinyl 0.7-1.3,Shell 9-13, phenolic resins 3-5, hexa 2-4, ethanol 45-60, auxiliary agent 3-6.
Described auxiliary agent is made up of following raw materials in part by weight: pig bone 25-30, rectorite 35-45, metakaolin65-95, silicon ash 30-45, Silane coupling reagent KH-570 2-6, Ludox 0.4-0.8, nano carborundum powder 1-3,Nano ferriferrous oxide 1.2-3.4, angelica powder 0.6-1.2, sodium carboxymethyl starch 0.4-0.9, carboxymethyl cellulose4-7, suitable quantity of water, its preparation method is that pig bone, rectorite, metakaolin are put into calcining furnace at 560-680 DEG CLower calcining 2-3 hour, takes out, and the hydrochloric acid solution of putting into 8-12% soaks 4-5 hour, filters and takes out, and usesClear water cyclic washing, dries and pulverizes, the stirring pulping that adds water, meanwhile, add nano carborundum powder, Ludox,Sodium carboxymethyl starch grinds, the dry xeraphium that makes of spraying; Get silicon ash, angelica powder adds silane couplerKH-570 stirs and makes slurry, and plus nano tri-iron tetroxide grinds 20-30 minute, makes the silicon ash of modification; WillThe grinding granulation that adds water of the above-mentioned xeraphium making, modified silicon ash and other residual components, dries and get final product.
The preparation method of described a kind of alcohol-base foundry coating with wearability, is characterized in that comprising following stepRapid:
(1) shell is put into retort calcination processing 3-4 hour at 405-520 DEG C, taken out, put intoIn the hydrochloric acid solution of 10-12%, soak 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spraySpill vaporific white glue with vinyl and stir and evenly mix, the modification oyster shell whiting of system;
(2) together with the ethanol of modification oyster shell whiting above-mentioned steps being made and kaolin, 1/4 weight, grind and addHeat, to 140-160 DEG C, adds zinc dithiophosphate, triphenyl phosphite to keep temperature to stir 1-2 hour, coldBut add magnesium chloride to grind 30-40 minute to 50-60 DEG C, the dry xeraphium that makes of spraying;
(3) lithium bentonite is put into calcining furnace and calcined 2-4 hour at 530-680 DEG C, take out cooling,Add the ethanol of 1/5 weight to stir, leave standstill 10-12 hour, then add sodium carboxymethylcellulose, phenolUrea formaldehyde, hexa are heated to 70-80 DEG C and stir 30-40 minute;
(4) zircon is dropped in reactor, add the ethanol agitation grinding 10-15 of yellow starch gum and surplusMinute, then add step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously,Keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.
The present invention has following beneficial effect: the present invention adds zinc dithiophosphate and improved coating as anti-wear agentAnti-wear performance; Add again oyster shell whiting and other the effective auxiliary agents after modification, the painting making according to the present invention simultaneouslyMaterial has that suspension is good, brushing performance is good, surface smoothness is good, does not precipitate, does not lump, good fluidity, anti-The feature of the strong and good stability of scab.
Detailed description of the invention
Described a kind of alcohol-base foundry coating with wearability, is characterized in that, by the raw material of following weight portionMake: yellow starch gum 1.6, magnesium chloride 0.4, lithium bentonite 1, kaolin 45, zircon 34, carboxymethylSodium cellulosate 2, zinc dithiophosphate 0.2, triphenyl phosphite 1.1, white glue with vinyl 1.2, shell 9, phenolic aldehyde treeFat 3, hexa 2, ethanol 56, auxiliary agent 3.
Described auxiliary agent is made up of following raw materials in part by weight: pig bone 27, rectorite 42, metakaolin 85, siliconAsh 30, Silane coupling reagent KH-570 2, Ludox 0.4, nano carborundum powder 1, nano ferriferrous oxide 1.2,Angelica powder 1.2, sodium carboxymethyl starch 0.4, carboxymethyl cellulose 4, suitable quantity of water, its preparation method be by pig bone,Rectorite, metakaolin are put into calcining furnace and calcine 2-3 hour at 560-680 DEG C, take out, and put into 8-12%Hydrochloric acid solution in soak 4-5 hour, filter take out, use clear water cyclic washing, dry pulverizing, stirring adds waterPulping, meanwhile, adds nano carborundum powder, Ludox, sodium carboxymethyl starch to grind, spraying is dry make dryDry powder; Getting silicon ash, angelica powder adds Silane coupling reagent KH-570 to stir to make slurry, plus nano tri-iron tetroxideGrind 20-30 minute, make the silicon ash of modification; By the above-mentioned xeraphium making, modified silicon ash and other residuesThe composition grinding granulation that adds water, dries and get final product.
Preparation method comprises the following steps:
(1) shell is put into retort calcination processing 3-4 hour at 405-520 DEG C, taken out, put intoIn the hydrochloric acid solution of 10-12%, soak 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spraySpill vaporific white glue with vinyl and stir and evenly mix, the modification oyster shell whiting of system;
(2) together with the ethanol of modification oyster shell whiting above-mentioned steps being made and kaolin, 1/4 weight, grind and addHeat, to 140-160 DEG C, adds zinc dithiophosphate, triphenyl phosphite to keep temperature to stir 1-2 hour, coldBut add magnesium chloride to grind 30-40 minute to 50-60 DEG C, the dry xeraphium that makes of spraying;
(3) lithium bentonite is put into calcining furnace and calcined 2-4 hour at 530-680 DEG C, take out cooling,Add the ethanol of 1/5 weight to stir, leave standstill 10-12 hour, then add sodium carboxymethylcellulose, phenolUrea formaldehyde, hexa are heated to 70-80 DEG C and stir 30-40 minute;
(4) zircon is dropped in reactor, add the ethanol agitation grinding 10-15 of yellow starch gum and surplusMinute, then add step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously,Keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.
The operation technique index of processing the cast paint obtaining by above-described embodiment is as follows:
(1) solid content: 34.12%;
(2) coating abrasion performance: 0.71;
(3) gas forming amount: 11.4mL/g;
(4) place 24 hours coating suspension rates: 98.56%;
(5) coating, oven dry, cooling rear appearance of coat: flawless, nothing foaming and macroscopic pin holeUniform coating.
Claims (1)
1. one kind has the alcohol-base foundry coating of wearability, it is characterized in that, made by the raw material of following weight portion: yellow starch gum 1.2-3.4, magnesium chloride 0.4-0.7, lithium bentonite 1-2, kaolin 45-60, zircon 30-40, sodium carboxymethylcellulose 2-3, zinc dithiophosphate 0.2-0.4, triphenyl phosphite 0.6-1.2, white glue with vinyl 0.7-1.3, shell 9-13, phenolic resins 3-5, hexa 2-4, ethanol 45-60, auxiliary agent 3-6, described auxiliary agent is made up of following raw materials in part by weight: pig bone 25-30, rectorite 35-45, metakaolin 65-95, silicon ash 30-45, Silane coupling reagent KH-570 2-6, Ludox 0.4-0.8, nano carborundum powder 1-3, nano ferriferrous oxide 1.2-3.4, angelica powder 0.6-1.2, sodium carboxymethyl starch 0.4-0.9, carboxymethyl cellulose 4-7, suitable quantity of water, its preparation method is by pig bone, rectorite, metakaolin is put into calcining furnace and calcine 2-3 hour at 560-680 DEG C, take out, the hydrochloric acid solution of putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, stirring pulping adds water, simultaneously, add nano carborundum powder, Ludox, sodium carboxymethyl starch grinds, the dry xeraphium that makes of spraying, get silicon ash, angelica powder and add Silane coupling reagent KH-570 to stir to make slurry, plus nano tri-iron tetroxide grinds 20-30 minute, makes the silicon ash of modification, by the grinding granulation that adds water of the above-mentioned xeraphium making, modified silicon ash and other residual components, dry and get final product,
The preparation method of described a kind of alcohol-base foundry coating with wearability, comprises the following steps:
(1) shell is put into retort calcination processing 3-4 hour at 405-520 DEG C, taken out, the hydrochloric acid solution of putting into 10-12% soaks 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spray vaporific white glue with vinyl and stir and evenly mix, the modification oyster shell whiting of system;
(2) together with the ethanol of modification oyster shell whiting above-mentioned steps being made and kaolin, 1/4 weight, grind and be heated to 140-160 DEG C, add zinc dithiophosphate, triphenyl phosphite to keep temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add magnesium chloride to grind 30-40 minute, the dry xeraphium that makes of spraying;
(3) lithium bentonite is put into calcining furnace and calcined 2-4 hour at 530-680 DEG C, take out cooling, add the ethanol of 1/5 weight to stir, leave standstill 10-12 hour, then add sodium carboxymethylcellulose, phenolic resins, hexa to be heated to 70-80 DEG C and stir 30-40 minute;
(4) zircon is dropped in reactor, add the ethanol agitation grinding 10-15 minute of yellow starch gum and surplus, add again step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.
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| JPS5419419A (en) * | 1977-07-13 | 1979-02-14 | Kubota Ltd | Mold coating material for organic casting sand |
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| 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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| CN104014724A (en) | 2014-09-03 |
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