CN104190859A - Alcohol-based casting coating for lost foam casting and manufacturing method thereof - Google Patents

Abstract

The invention discloses an alcohol-based casting coating for lost foam casting. The alcohol-based casting coating is characterized by being composed of, by weight, four parts to seven parts of silicon metal powder, 55 parts to 70 parts of zirconium mullite, 30 parts to 40 parts of iron-ore slag, 25 parts to 35 parts of ferrovanadium slag, 0.4 part to 0.8 part of tungsten disulfide, 0.5 part to 0.7 part of zirconium phosphate, 0.3 part to 0.6 part of nanocrystalline cuprous oxide, 1 part to 2 parts of attapulgite, 6 parts to 10 parts of peat, 2 parts to 4 parts of pine needle oil, 6 parts to 9 parts of polyvinyl alcohol carboxy butyl aldehyde, 50 parts to 60 parts of ethyl alcohol and 3 parts to 6 parts of auxiliaries. The coating manufactured through the method has the excellent thermal insulation property and good suspension property and abrasive resistance. The coating further has the good ventilation property and comparatively high surface strength and brushing property. The defects that in an existing casting coating preparative technique, refractory powder is expensive, and the production cost of the coating is comparatively high are overcome. The coating manufactured through the method has super quality and competitive price and is simple in production technique.

Description

A kind of dispellable mould casting alcohol-base foundry coating and preparation method thereof

Technical field

The present invention relates to cast paint field, be specifically related to a kind of dispellable mould casting 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 comprised of the material of multiple different in kind, it forms and mainly comprises the compositions such as refractory material, suspending agent, carrier, binding agent and special additive.While acting on foundry goods, require coating have good processing performance, service behaviour, quality stability and apply reappearance, can play on the one hand heat insulation, equalization temperature, exempt the object of the impingment corrosion of molten metal, can prevent on the other hand the defects such as cracking that cast product causes because Local cooling is too fast, sand holes, white iron formation.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 by lighting in coating, does not need to dry, and can shorten the production cycle, simplifies technique, reduces drying plant investment, is to be cast a kind of quick drying paint that boundary is widely used, and has been widely used in the production of steel, iron, coloured foundry goods.

Yet in prior art, alcohol-base foundry coating has many defects, such as: suspension stability is poor, in long-distance transport and easily layering in depositing process, resistance to elevated temperatures is poor, hardness is low, a little less than poor chemical stability, low, the anti-stick grittiness of anti-metal performance of flushing etc., make alcohol-base foundry coating function singleness, cannot meet large-scale industrial production.

Summary of the invention

Object of the present invention is just to provide a kind of dispellable mould casting 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 dispellable mould casting alcohol-base foundry coating, it is characterized in that, by the raw material of following weight portion, made: metallic silicon power 4-7, zirconium mullite 55-70, Iron-ore Slag 30-40, ferrovanadium dregs 25-35, tungsten disulfide 0.4-0.8, basic zirconium phosphate 0.5-0.7, nano cuprous oxide 0.3-0.6, attapulgite 1-2, peat 6-10, pine needle oil 2-4, polyvinyl alcohol carboxylic butyraldehyde 6-9, ethanol 50-60, auxiliary agent 3-6.

Described auxiliary agent is made by following raw materials in part by weight: building waste 21-30, attapulgite clay 6-9, kaolin 75-95, Silane coupling reagent KH-570 1.2-3.5, nanometer silicon carbide 0.5-1.1, brown iron oxide 2-5, carboxymethyl cellulose 3-6, nanometer titanium dioxide zinc 0.6-1.3, glass microballoon 2-6, wollastonite 6-9, polyvinyl acetate emulsion 2.5-4.1, suitable quantity of water, its preparation method is by building waste, attapulgite clay, kaolin is put into calcining furnace and calcine 2-3 hour at 550-680 ℃, 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, add water and stir pulping, simultaneously, add nanometer titanium dioxide zinc, brown iron oxide grinds, the dry xeraphium that makes of spraying, Silane coupling reagent KH-570 is heated to 200-230 ℃, stirs 10-20 minute, be cooled to 60-80 ℃ and add nanometer silicon carbide, glass microballoon high-speed stirred within 20-30 minute, to make mixture, wollastonite is pulverized, add polyvinyl acetate emulsion to stir 5-10 minute, then add the above-mentioned xeraphium making, mixture and other residual components to grind granulation, dry and get final product.

The preparation method of described a kind of dispellable mould casting alcohol-base foundry coating, is characterized in that comprising the following steps:

(1) Iron-ore Slag and ferrovanadium dregs are put into retort calcination processing 3-4 hour at 480-640 ℃, take 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, sprinkling pine needle oil stirs and evenly mixs, and makes the slag powders of modification;

(2) together with the ethanol of Treated By Modified Slag powder above-mentioned steps being made and attapulgite, nano cuprous oxide, 1/4 weight, stir pulping and be heated to 100-120 ℃, keep temperature to stir 1-2 hour, be cooled to 50-60 ℃ and add basic zirconium phosphate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of peat and 1/5 weight is stirred, standing 10-12 hour, then adds tungsten disulfide, polyvinyl alcohol carboxylic butyraldehyde to be heated to 70-80 ℃ and stirs 30-40 minute;

(4) zirconium mullite is pulverized and dropped in reactor, the ethanol agitation grinding 10-15 minute that adds metallic silicon power and surplus, add again step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 ℃ simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.

The present invention has following beneficial effect: method of the present invention makes coating and has excellent heat-insulating property, good suspension and wearability; Coating also has good gas permeability and higher surface strength and brushability.It is expensive that the present invention has overcome in existing cast paint technology of preparing refractory powder, the defect that coating material production cost is higher; Coating super quality and competitive price and the production technology of utilizing the present invention to make are simple.

The specific embodiment

Described a kind of dispellable mould casting alcohol-base foundry coating, it is characterized in that, by the raw material of following weight portion, made: metallic silicon power 5, zirconium mullite 58, Iron-ore Slag 37, ferrovanadium dregs 29, tungsten disulfide 0.4, basic zirconium phosphate 0.5, nano cuprous oxide 0.3, attapulgite 1, peat 6, pine needle oil 2, polyvinyl alcohol carboxylic butyraldehyde 6, ethanol 50, auxiliary agent 4.

Described auxiliary agent is made by following raw materials in part by weight: building waste 26, attapulgite clay 6, kaolin 79, Silane coupling reagent KH-570 1.5, nanometer silicon carbide 0.5, brown iron oxide 2, carboxymethyl cellulose 3, nanometer titanium dioxide zinc 0.6, glass microballoon 2, wollastonite 9, polyvinyl acetate emulsion 2.5, suitable quantity of water, its preparation method is by building waste, attapulgite clay, kaolin is put into calcining furnace and calcine 2-3 hour at 550-680 ℃, 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, add water and stir pulping, simultaneously, add nanometer titanium dioxide zinc, brown iron oxide grinds, the dry xeraphium that makes of spraying, Silane coupling reagent KH-570 is heated to 200-230 ℃, stirs 10-20 minute, be cooled to 60-80 ℃ and add nanometer silicon carbide, glass microballoon high-speed stirred within 20-30 minute, to make mixture, wollastonite is pulverized, add polyvinyl acetate emulsion to stir 5-10 minute, then add the above-mentioned xeraphium making, mixture and other residual components to grind granulation, dry and get final product.

Preparation method comprises the following steps:

(1) Iron-ore Slag and ferrovanadium dregs are put into retort calcination processing 3-4 hour at 480-640 ℃, take 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, sprinkling pine needle oil stirs and evenly mixs, and makes the slag powders of modification;

(2) together with the ethanol of Treated By Modified Slag powder above-mentioned steps being made and attapulgite, nano cuprous oxide, 1/4 weight, stir pulping and be heated to 100-120 ℃, keep temperature to stir 1-2 hour, be cooled to 50-60 ℃ and add basic zirconium phosphate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of peat and 1/5 weight is stirred, standing 10-12 hour, then adds tungsten disulfide, polyvinyl alcohol carboxylic butyraldehyde to be heated to 70-80 ℃ and stirs 30-40 minute;

(4) zirconium mullite is pulverized and dropped in reactor, the ethanol agitation grinding 10-15 minute that adds metallic silicon power and surplus, add again step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 ℃ simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.

The technical indicator of processing the cast paint obtaining by above-described embodiment is as follows:

(1) coating abrasion performance: 0.52;

(2) place 24 hours coating suspension rates: 98%;

(3) coating density: 1.41g/cm3;

(4) coating, oven dry, cooling rear appearance of coat: the uniform coating of flawless, nothing foaming and macroscopic pin hole.

Claims (2)

1. a dispellable mould casting alcohol-base foundry coating, it is characterized in that, by the raw material of following weight portion, made: metallic silicon power 4-7, zirconium mullite 55-70, Iron-ore Slag 30-40, ferrovanadium dregs 25-35, tungsten disulfide 0.4-0.8, basic zirconium phosphate 0.5-0.7, nano cuprous oxide 0.3-0.6, attapulgite 1-2, peat 6-10, pine needle oil 2-4, polyvinyl alcohol carboxylic butyraldehyde 6-9, ethanol 50-60, auxiliary agent 3-6, described auxiliary agent is made by following raw materials in part by weight: building waste 21-30, attapulgite clay 6-9, kaolin 75-95, Silane coupling reagent KH-570 1.2-3.5, nanometer silicon carbide 0.5-1.1, brown iron oxide 2-5, carboxymethyl cellulose 3-6, nanometer titanium dioxide zinc 0.6-1.3, glass microballoon 2-6, wollastonite 6-9, polyvinyl acetate emulsion 2.5-4.1, suitable quantity of water, its preparation method is by building waste, attapulgite clay, kaolin is put into calcining furnace and calcine 2-3 hour at 550-680 ℃, 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, add water and stir pulping, simultaneously, add nanometer titanium dioxide zinc, brown iron oxide grinds, the dry xeraphium that makes of spraying, Silane coupling reagent KH-570 is heated to 200-230 ℃, stirs 10-20 minute, be cooled to 60-80 ℃ and add nanometer silicon carbide, glass microballoon high-speed stirred within 20-30 minute, to make mixture, wollastonite is pulverized, add polyvinyl acetate emulsion to stir 5-10 minute, then add the above-mentioned xeraphium making, mixture and other residual components to grind granulation, dry and get final product.

2. the preparation method of a kind of dispellable mould casting alcohol-base foundry coating according to claim 1, is characterized in that comprising the following steps:

(1) Iron-ore Slag and ferrovanadium dregs are put into retort calcination processing 3-4 hour at 480-640 ℃, take 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, sprinkling pine needle oil stirs and evenly mixs, and makes the slag powders of modification;

(2) together with the ethanol of Treated By Modified Slag powder above-mentioned steps being made and attapulgite, nano cuprous oxide, 1/4 weight, stir pulping and be heated to 100-120 ℃, keep temperature to stir 1-2 hour, be cooled to 50-60 ℃ and add basic zirconium phosphate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of peat and 1/5 weight is stirred, standing 10-12 hour, then adds tungsten disulfide, polyvinyl alcohol carboxylic butyraldehyde to be heated to 70-80 ℃ and stirs 30-40 minute;

(4) zirconium mullite is pulverized and dropped in reactor, the ethanol agitation grinding 10-15 minute that adds metallic silicon power and surplus, add again step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly risen to 75-85 ℃ simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches 50 μ m below.