CN104014721B - A kind of light dolomite alcohol-base foundry coating and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of light dolomite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: phosphoric acid 0.4-0.7, polystyrene foam ball 1.2-3.5, light dolomite 2.1-3.2, graphite 40-55, chromite 55-60, attapulgite clay 1-2, zinc dithiophosphate 0.2-0.4, cocamido propyl betaine 0.1-0.3, glass fibre 2-4, Herba Eichhorniae 11-14, phenolic resin 1-4, hexamethylenetetramine 2-3, ethanol 40-50, auxiliary agent 3-6; The present invention will add in raw material after Herba Eichhorniae high-temperature process, add the comprehensive utilization scope of Herba Eichhorniae, reduce cost, utilize the coating that the present invention prepares to have the advantages such as high temperature resistant, good flame resistance, caking property, coating, suspension are excellent, be easily coated with, anti-burnon is effective.

Description

A kind of light dolomite 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 light dolomite alcohol-base foundry coating and preparation method thereof.

Background technology

Cast paint refers to for being coated in die cavity or core surface, material is assisted in casting to change the performances such as its surface 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 includes the compositions such as refractory material, suspending agent, carrier, binding agent and special additive. Require when acting on foundry goods that coating has good processing performance, service behaviour, quality stability and applies repeatability, can play heat insulation on the one hand, equalization temperature, exempt the purpose of impingment corrosion of molten metal, be possible to prevent the defects such as cracking that cast product causes because Local cooling is too fast, sand holes, white iron formation 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 ignited both curable after application, does not need to dry, can shorten the production cycle, and Simplified flowsheet reduces drying plant investment, is be cast a kind of quick drying paint that boundary is widely used, is widely used in the production of steel, ferrum, coloured foundry goods.

But alcohol-base foundry coating has many defects in prior art, such as: suspension stability is poor, long-distance transport and deposit easily layering in process, resistance to elevated temperatures is poor, hardness is low, poor chemical stability, anti-metal performance of flushing grittiness low, anti-stick is weak, make alcohol-base foundry coating function singleness, it is impossible to meet large-scale industrial production.

Summary of the invention

It is an object of the invention to provide a kind of light dolomite 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 light dolomite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: phosphoric acid 0.4-0.7, polystyrene foam ball 1.2-3.5, light dolomite 2.1-3.2, graphite 40-55, chromite 55-60, attapulgite clay 1-2, zinc dithiophosphate 0.2-0.4, cocamido propyl betaine 0.1-0.3, glass fibre 2-4, Herba Eichhorniae 11-14, phenolic resin 1-4, hexamethylenetetramine 2-3, ethanol 40-50, auxiliary agent 3-6.

Described auxiliary agent is made up of following raw materials in part by weight: Os Sus domestica 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, Radix Angelicae Sinensis powder 0.6-1.2, carboxymethyl starch sodium 0.4-0.9, carboxymethyl cellulose 4-7, suitable quantity of water, its preparation method is by Os Sus domestica, rectorite, metakaolin is put in calcining furnace and is calcined 2-3 hour at 560-680 DEG C, take out, put in the hydrochloric acid solution of 8-12% and soak 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add nano carborundum powder, Ludox, carboxymethyl starch sodium grinds, spray drying prepares xeraphium, take silicon ash, Radix Angelicae Sinensis powder adds Silane coupling reagent KH-570 stirring and makes slurry, and plus nano ferroso-ferric oxide grinds 20-30 minute, prepares modified silicon ash, add water grinding pelletize by above-mentioned prepared xeraphium, modified silicon ash and other residual componentss, drying.

The preparation method of described a kind of light dolomite alcohol-base foundry coating, it is characterised in that comprise the following steps:

(1) put into after Herba Eichhorniae being dried in retort at 405-520 DEG C calcination processing 3-4 hour, take out, put in the hydrochloric acid solution of 10-12% and soak 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize;

(2) pulping heating are stirred to 140-160 DEG C together with the product and the attapulgite clay that above-mentioned steps are prepared, the ethanol of 1/4 weight, add polystyrene foam ball, zinc dithiophosphate keeps temperature to stir 1-2 hour, being cooled to 50-60 DEG C and add phosphoric acid grinding 30-40 minute, spray drying prepares xeraphium;

(3) light dolomite and chromite are put in calcining furnace calcine 2-4 hour at 530-680 DEG C, take out cooling, pulverize, the ethanol adding 1/5 weight stirs, stand 10-12 hour, be subsequently adding cocamido propyl betaine, phenolic resin, hexamethylenetetramine heating to 70-80 DEG C stir 30-40 minute;

(4) graphite is put in reactor, the ethanol agitation grinding of addition glass fibre and surplus 10-15 minute, add step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly increased to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches less than 50 ��m.

The present invention has following beneficial effect: the present invention will add in raw material after Herba Eichhorniae high-temperature process, add the comprehensive utilization scope of Herba Eichhorniae, reduce cost, utilize the coating that the present invention prepares to have the advantages such as high temperature resistant, good flame resistance, caking property, coating, suspension are excellent, be easily coated with, anti-burnon is effective.

Detailed description of the invention

Described a kind of light dolomite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: phosphoric acid 0.7, polystyrene foam ball 2.2, light dolomite 2.1, graphite 40, chromite 56, attapulgite clay 1, zinc dithiophosphate 0.2, cocamido propyl betaine 0.1, glass fibre 2, Herba Eichhorniae 14, phenolic resin 1, hexamethylenetetramine 2, ethanol 45, auxiliary agent 3.

Described auxiliary agent is made up of following raw materials in part by weight: Os Sus domestica 27, rectorite 42, metakaolin 85, silicon ash 30, Silane coupling reagent KH-570 2, Ludox 0.4, nano carborundum powder 1, nano ferriferrous oxide 1.2, Radix Angelicae Sinensis powder 1.2, carboxymethyl starch sodium 0.4, carboxymethyl cellulose 4, suitable quantity of water, its preparation method is by Os Sus domestica, rectorite, metakaolin is put in calcining furnace and is calcined 2-3 hour at 560-680 DEG C, take out, put in the hydrochloric acid solution of 8-12% and soak 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add nano carborundum powder, Ludox, carboxymethyl starch sodium grinds, spray drying prepares xeraphium,Take silicon ash, Radix Angelicae Sinensis powder adds Silane coupling reagent KH-570 stirring and makes slurry, and plus nano ferroso-ferric oxide grinds 20-30 minute, prepares modified silicon ash; Add water grinding pelletize by above-mentioned prepared xeraphium, modified silicon ash and other residual componentss, drying.

Manufacture method comprises the following steps:

(1) put into after Herba Eichhorniae being dried in retort at 405-520 DEG C calcination processing 3-4 hour, take out, put in the hydrochloric acid solution of 10-12% and soak 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize;

(2) pulping heating are stirred to 140-160 DEG C together with the product and the attapulgite clay that above-mentioned steps are prepared, the ethanol of 1/4 weight, add polystyrene foam ball, zinc dithiophosphate keeps temperature to stir 1-2 hour, being cooled to 50-60 DEG C and add phosphoric acid grinding 30-40 minute, spray drying prepares xeraphium;

(3) light dolomite and chromite are put in calcining furnace calcine 2-4 hour at 530-680 DEG C, take out cooling, pulverize, the ethanol adding 1/5 weight stirs, stand 10-12 hour, be subsequently adding cocamido propyl betaine, phenolic resin, hexamethylenetetramine heating to 70-80 DEG C stir 30-40 minute;

(4) graphite is put in reactor, the ethanol agitation grinding of addition glass fibre and surplus 10-15 minute, add step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly increased to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches less than 50 ��m.

The use technical specification being processed the cast paint obtained by above-described embodiment is as follows:

(1) solid content: 31.15%;

(2) gas forming amount: 14.1mL/g;

(3) 24 hours coating suspension rates are placed: 98%;

(4) normal temperature strength of coating: 805g/mm;

(5) the room temperature breathability of coating: 12.05cm²��(kpa��min)^-1;

(6) appearance of coat after coating, drying, cooling: the uniform coating of flawless, nothing foaming and macroscopic pin hole.

Claims (1)

1. a light dolomite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: phosphoric acid 0.4-0.7, polystyrene foam ball 1.2-3.5, light dolomite 2.1-3.2, graphite 40-55, chromite 55-60, attapulgite clay 1-2, zinc dithiophosphate 0.2-0.4, cocamido propyl betaine 0.1-0.3, glass fibre 2-4, Herba Eichhorniae 11-14, phenolic resin 1-4, hexamethylenetetramine 2-3, ethanol 40-50, auxiliary agent 3-6, described auxiliary agent is made up of following raw materials in part by weight: Os Sus domestica 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, Radix Angelicae Sinensis powder 0.6-1.2, carboxymethyl starch sodium 0.4-0.9, carboxymethyl cellulose 4-7, suitable quantity of water, its preparation method is by Os Sus domestica, rectorite, metakaolin is put in calcining furnace and is calcined 2-3 hour at 560-680 DEG C, take out, put in the hydrochloric acid solution of 8-12% and soak 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, add water stirring pulping, simultaneously, add nano carborundum powder, Ludox, carboxymethyl starch sodium grinds, spray drying prepares xeraphium, take silicon ash, Radix Angelicae Sinensis powder adds Silane coupling reagent KH-570 stirring and makes slurry, and plus nano ferroso-ferric oxide grinds 20-30 minute, prepares modified silicon ash,Add water grinding pelletize by above-mentioned prepared xeraphium, modified silicon ash and other residual componentss, drying;

The manufacture method of described a kind of light dolomite alcohol-base foundry coating, comprises the following steps:

(1) put into after Herba Eichhorniae being dried in retort at 405-520 DEG C calcination processing 3-4 hour, take out, put in the hydrochloric acid solution of 10-12% and soak 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize;

(2) pulping heating are stirred to 140-160 DEG C together with the product and the attapulgite clay that above-mentioned steps are prepared, the ethanol of 1/4 weight, add polystyrene foam ball, zinc dithiophosphate keeps temperature to stir 1-2 hour, being cooled to 50-60 DEG C and add phosphoric acid grinding 30-40 minute, spray drying prepares xeraphium;

(3) light dolomite and chromite are put in calcining furnace calcine 2-4 hour at 530-680 DEG C, take out cooling, pulverize, the ethanol adding 1/5 weight stirs, stand 10-12 hour, be subsequently adding cocamido propyl betaine, phenolic resin, hexamethylenetetramine heating to 70-80 DEG C stir 30-40 minute;

(4) graphite is put in reactor, the ethanol agitation grinding of addition glass fibre and surplus 10-15 minute, add step (2), (3) product, auxiliary agent, temperature of reaction kettle is slowly increased to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grind until fineness reaches less than 50 ��m.