CN104475669A - Anti-burn on casting coating and manufacturing method thereof - Google Patents

Abstract

The invention discloses an anti-burn on casting coating which is characterized by being prepared from the following raw materials, by weight, 55-75 parts of high alumina bauxite, 45-65 parts of natural zircon sand, 2-4 parts of silicon carbide, 6-9 parts of light calcium, 2-3 parts of clay, 1-4 parts of silicone oil, 13-16 parts of sesame straw, 1-2 parts of li-bentonite, 0.3-0.6 part of calcium superphosphate, 5-8 parts of ethyl silicate, 45-60 parts of ethanol and 4-7 parts of an auxiliary agent. By adding modified sesame straw into raw materials, defects in the prior art are effectively solved. The anti-burn on casting coating has good effects in aspects of high-temperature strength, anti-burn on performance, brushability, high-temperature crack resistance, suspension property and the like. By coating the surface of a casting with a layer of the casting coating, defects of sand burning, sand inclusion, blowholes and the like on casting surface can effectively be prevented and reduced, and surface roughness of a casting can be decreased. In addition, the casting coating has advantages of simple and fast technology, short production period, low cost and good market prospect.

Description

A kind of anti-burnon cast paint and preparation method thereof

Technical field

The present invention relates to cast paint field, be specifically related to a kind of anti-burnon cast paint 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 anti-burnon cast paint 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 anti-burnon cast paint, it is characterized in that, be made up of the raw material of following weight portion: alumine 55-75, natural zircon sand 45-65, carborundum 2-4, fine particle calcium carbonate 6-9, clay 2-3, silicone oil 1-4, sesame stalk 13-16, lithium bentonite 1-2, calcium superphosphate 0.3-0.6, silester 5-8, ethanol 45-60, auxiliary agent 4-7.

Described auxiliary agent is made up of following raw materials in part by weight: plant ash 15-17, graphite 85-100, ice crystal 20-25, cyclodextrin 1.4-3.6, natural coating agent which has to be dissolved in alcohol before use 2.4-3.8, ethanol 25-30, lithium bentonite 1-2, nanometer silicon carbide 0.7-1.3, brown iron oxide 2.1-3.6, nano-calcium carbonate 3-5, chitin 0.9-2.1, paper pulp 12-17, suitable quantity of water, its preparation method is by graphite, ice crystal 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, nano-calcium carbonate grinds, spraying dry obtains xeraphium, cyclodextrin, natural coating agent which has to be dissolved in alcohol before use are joined in ethanol and heat stirring and dissolving, adds plant ash, lithium bentonite, nanometer silicon carbide high-speed stirred 10-20 minute, until fineness reaches the lithium bentonite that less than 50 μm obtain modification, xeraphium, modification lithium bentonite, chitin, paper pulp are added suitable quantity of water grinding granulation, dries and get final product.

The preparation method of described a kind of anti-burnon cast paint, is characterized in that comprising the following steps:

(1) sesame stalk is put into retort calcination processing 3-4 hour at 450-550 DEG C, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spray the sesame powder of straw that silicone oil stirs and evenly mixs obtained modification;

(2) modification sesame powder of straw above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of clay, 1/4 weight, temperature is kept to stir 1-2 hour, be cooled to 50-60 DEG C and add calcium superphosphate grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add fine particle calcium carbonate, silester be heated to 70-80 DEG C stir 30-40 minute;

(4) alumine, natural zircon sand are dropped in reactor, add the ethanol agitation grinding 10-15 minute of carborundum 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:

The present invention is by adding in raw material modified sesame stalk to efficiently solve prior art defect, good effect is had in elevated temperature strength, anti-stick grittiness, brushability, high-temperature resistant property, suspension etc., cast(ing) surface applies one deck cast paint, can effectively prevent and reduce scab, the defect such as burning into sand, sand holes, reduces surface roughness; And technique simple and fast, with short production cycle, cost is low, market prospects are good.

Detailed description of the invention

Described a kind of anti-burnon cast paint, it is characterized in that, be made up of the raw material of following weight portion: alumine 56, natural zircon sand 49, carborundum 2, fine particle calcium carbonate 9, clay 3, silicone oil 1, sesame stalk 13, lithium bentonite 1, calcium superphosphate 0.3, silester 5, ethanol 45, auxiliary agent 4.

Described auxiliary agent is made up of following raw materials in part by weight: plant ash 17, graphite 89, ice crystal 22, cyclodextrin 1.6, natural coating agent which has to be dissolved in alcohol before use 2.4, ethanol 25, lithium bentonite 1, nanometer silicon carbide 0.8, brown iron oxide 2.5, nano-calcium carbonate 3, chitin 0.9, paper pulp 12, suitable quantity of water, its preparation method is by graphite, ice crystal 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, nano-calcium carbonate grinds, spraying dry obtains xeraphium, cyclodextrin, natural coating agent which has to be dissolved in alcohol before use are joined in ethanol and heat stirring and dissolving, adds plant ash, lithium bentonite, nanometer silicon carbide high-speed stirred 10-20 minute, until fineness reaches the lithium bentonite that less than 50 μm obtain modification, xeraphium, modification lithium bentonite, chitin, paper pulp are added suitable quantity of water grinding granulation, dries and get final product.

Preparation method comprises the following steps:

(1) sesame stalk is put into retort calcination processing 3-4 hour at 450-550 DEG C, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spray the sesame powder of straw that silicone oil stirs and evenly mixs obtained modification;

(2) modification sesame powder of straw above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of clay, 1/4 weight, temperature is kept to stir 1-2 hour, be cooled to 50-60 DEG C and add calcium superphosphate grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add fine particle calcium carbonate, silester be heated to 70-80 DEG C stir 30-40 minute;

(4) alumine, natural zircon sand are dropped in reactor, add the ethanol agitation grinding 10-15 minute of carborundum 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) 24 hours coating suspension rates are placed: 98.98%;

(2) intensity of paint coatings after 1200 DEG C of roastings: 810g/mm;

(3) the normal temperature gas permeability of coating: 11.4cm2 (kpamin)-1.

Claims (2)

1. an anti-burnon cast paint, it is characterized in that, be made up of the raw material of following weight portion: alumine 55-75, natural zircon sand 45-65, carborundum 2-4, fine particle calcium carbonate 6-9, clay 2-3, silicone oil 1-4, sesame stalk 13-16, lithium bentonite 1-2, calcium superphosphate 0.3-0.6, silester 5-8, ethanol 45-60, auxiliary agent 4-7, described auxiliary agent is made up of following raw materials in part by weight: plant ash 15-17, graphite 85-100, ice crystal 20-25, cyclodextrin 1.4-3.6, natural coating agent which has to be dissolved in alcohol before use 2.4-3.8, ethanol 25-30, lithium bentonite 1-2, nanometer silicon carbide 0.7-1.3, brown iron oxide 2.1-3.6, nano-calcium carbonate 3-5, chitin 0.9-2.1, paper pulp 12-17, suitable quantity of water, its preparation method is by graphite, ice crystal 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, nano-calcium carbonate grinds, spraying dry obtains xeraphium, cyclodextrin, natural coating agent which has to be dissolved in alcohol before use are joined in ethanol and heat stirring and dissolving, adds plant ash, lithium bentonite, nanometer silicon carbide high-speed stirred 10-20 minute, until fineness reaches the lithium bentonite that less than 50 μm obtain modification, xeraphium, modification lithium bentonite, chitin, paper pulp are added suitable quantity of water grinding granulation, dries and get final product.

2. the preparation method of a kind of anti-burnon cast paint according to claim 1, is characterized in that comprising the following steps:

(1) sesame stalk is put into retort calcination processing 3-4 hour at 450-550 DEG C, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filter and take out, use clear water cyclic washing, dry and pulverize, spray the sesame powder of straw that silicone oil stirs and evenly mixs obtained modification;

(2) modification sesame powder of straw above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of clay, 1/4 weight, temperature is kept to stir 1-2 hour, be cooled to 50-60 DEG C and add calcium superphosphate grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add fine particle calcium carbonate, silester be heated to 70-80 DEG C stir 30-40 minute;

(4) alumine, natural zircon sand are dropped in reactor, add the ethanol agitation grinding 10-15 minute of carborundum 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.