CN104190860A - Pyroclastic rock alcohol-based casting coating and manufacturing method thereof - Google Patents

Abstract

The invention discloses a pyroclastic rock alcohol-based casting coating. The pyroclastic rock alcohol-based casting coating is characterized by being composed of, by weight, 40 parts to 50 parts of fluorite powder, 5 parts to 8 parts of floating beads, 50 parts to 60 parts of white corundum, 1 part to 2 parts of organobentonite, 18 parts to 28 parts of pyroclastic rock, 1.2 parts to 3.1 parts of colloidal silica, 2 parts to 4 parts of light calcium carbonate powder, 0.5 part to 0.8 part of heavy calcium carbonate powder, 1.2 parts to 3.2 parts of tributyl phosphate, 14 parts to 17 parts of rapeseed residue, 2 parts to 4 parts of phenolic resin, 3 parts to 5 parts of hexamine, 45 parts to 60 parts of ethyl alcohol and 3 parts to 6 parts of auxiliaries. The coating manufactured through the method is low in cost and simple in technology. Manual stirring or mechanical stirring can be adopted. The pyroclastic rock alcohol-based casting coating is suitable for being produced in a small scale or a large scale, and is easy to popularize, and the manufactured coating has the advantages of being high in strength, resistant to high temperature and good in air permeability.

Description

A kind of pyroclastic rock 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 pyroclastic rock 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.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 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 through lighting after 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.

But 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 pyroclastic rock 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 pyroclastic rock alcohol-base foundry coating, it is characterized in that, made by the raw material of following weight portion: Fluorspar Powder 40-50, float pearl 5-8, white fused alumina 50-60, organobentonite 1-2, pyroclastic rock 18-28, Ludox 1.2-3.1, precipitated calcium carbonate powder 2-4, heavy calcium carbonate 0.5-0.8, tributyl phosphate 1.2-3.2, rape slag 14-17, phenolic resins 2-4, hexa 3-5, ethanol 45-60, 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 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 brown iron oxide, calcium lignosulfonate grinds, the dry xeraphium that makes of spraying, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, add nano carborundum powder, coal tar, calcium carbonate to continue to stir 10-20 minute, make slurry, by the above-mentioned xeraphium making and slurry mix and blend 20-40 minute, then add the grinding granulation that adds water of other residual components, dry and get final product.

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

(1) by putting into retort calcination processing 3-4 hour at 450-550 DEG C after the oven dry of rape slag, take out, the acetum of putting into 10-12% soaks 3-6 hour, filters and takes out, and uses clear water cyclic washing, dries pulverizing, makes the rape ground-slag of modification;

(2) modification rape ground-slag above-mentioned steps being made stirs pulping and is heated to 140-160 DEG C together with the ethanol of pyroclastic rock, 1/4 weight, add and keep temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add precipitated calcium carbonate powder, heavy calcium carbonate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add tributyl phosphate, phenolic resins, hexa to be heated to 70-80 DEG C and stir 30-40 minute;

(4) white fused alumina is pulverized and dropped in reactor, add Fluorspar Powder, float the ethanol agitation grinding 10-15 minute of pearl and surplus, add again step (2), (3) product, Ludox, 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: pyroclastic rock alcohol-base foundry coating cost provided by the invention is low, technique is simple, can adopt artificial stirring or mechanical agitation, is suitable on a small scale or large-scale production, is easy to promote; In coating, refractory aggregate is mainly the pyroclastic rock of white fused alumina and modification, can reduce the defect of foundry goods cold shut and shrinkage porosite, simultaneously, because the carrier fluid of coating is industrial alcohol, volatilization is exceedingly fast, and is difficult for forming the gathering of gas in thin-walled die cavity, has greatly reduced the inspiratory capacity in casting pouring process, thereby reduce the defect level of pin hole, improved the quality of foundry goods; Utilize the coating that the present invention makes to have advantages of that intensity is high, high temperature resistant, gas permeability is good.

Detailed description of the invention

Described a kind of pyroclastic rock alcohol-base foundry coating, it is characterized in that, made by the raw material of following weight portion: Fluorspar Powder 44, float pearl 7, white fused alumina 56, organobentonite 1, pyroclastic rock 18, Ludox 1.2, precipitated calcium carbonate powder 2, heavy calcium carbonate 0.5, tributyl phosphate 2.2, rape slag 14, phenolic resins 2, hexa 5, 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 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 brown iron oxide, calcium lignosulfonate grinds, the dry xeraphium that makes of spraying, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, add nano carborundum powder, coal tar, calcium carbonate to continue to stir 10-20 minute, make slurry, by the above-mentioned xeraphium making and slurry mix and blend 20-40 minute, then add the grinding granulation that adds water of other residual components, dry and get final product.

Preparation method comprises the following steps:

(1) by putting into retort calcination processing 3-4 hour at 450-550 DEG C after the oven dry of rape slag, take out, the acetum of putting into 10-12% soaks 3-6 hour, filters and takes out, and uses clear water cyclic washing, dries pulverizing, makes the rape ground-slag of modification;

(2) modification rape ground-slag above-mentioned steps being made stirs pulping and is heated to 140-160 DEG C together with the ethanol of pyroclastic rock, 1/4 weight, add and keep temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add precipitated calcium carbonate powder, heavy calcium carbonate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add tributyl phosphate, phenolic resins, hexa to be heated to 70-80 DEG C and stir 30-40 minute;

(4) white fused alumina is pulverized and dropped in reactor, add Fluorspar Powder, float the ethanol agitation grinding 10-15 minute of pearl and surplus, add again step (2), (3) product, Ludox, 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 technical indicator of processing the cast paint obtaining by above-described embodiment is as follows:

(1) coating abrasion performance: 0.61;

(2) gas forming amount: 13.2mL/g;

(3) normal temperature strength of coating: 730g/mm;

(4) the normal temperature gas permeability of coating: 12.1cm2 (kpamin)-1;

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

Claims (2)

1. a pyroclastic rock alcohol-base foundry coating, it is characterized in that, made by the raw material of following weight portion: Fluorspar Powder 40-50, float pearl 5-8, white fused alumina 50-60, organobentonite 1-2, pyroclastic rock 18-28, Ludox 1.2-3.1, precipitated calcium carbonate powder 2-4, heavy calcium carbonate 0.5-0.8, tributyl phosphate 1.2-3.2, rape slag 14-17, phenolic resins 2-4, hexa 3-5, ethanol 45-60, 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 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 brown iron oxide, calcium lignosulfonate grinds, the dry xeraphium that makes of spraying, dimethicone, ferrocene are joined in Silane coupling reagent KH-570 and be stirred to dissolving, add nano carborundum powder, coal tar, calcium carbonate to continue to stir 10-20 minute, make slurry, by the above-mentioned xeraphium making and slurry mix and blend 20-40 minute, then add the grinding granulation that adds water of other residual components, dry and get final product.

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

(1) by putting into retort calcination processing 3-4 hour at 450-550 DEG C after the oven dry of rape slag, take out, the acetum of putting into 10-12% soaks 3-6 hour, filters and takes out, and uses clear water cyclic washing, dries pulverizing, makes the rape ground-slag of modification;

(2) modification rape ground-slag above-mentioned steps being made stirs pulping and is heated to 140-160 DEG C together with the ethanol of pyroclastic rock, 1/4 weight, add and keep temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add precipitated calcium carbonate powder, heavy calcium carbonate to grind 30-40 minute, the dry xeraphium that makes of spraying;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add tributyl phosphate, phenolic resins, hexa to be heated to 70-80 DEG C and stir 30-40 minute;

(4) white fused alumina is pulverized and dropped in reactor, add Fluorspar Powder, float the ethanol agitation grinding 10-15 minute of pearl and surplus, add again step (2), (3) product, Ludox, 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.