CN104475670A - Modified municipal sludge casting coating and manufacturing method thereof - Google Patents

Abstract

The invention discloses a modified municipal sludge casting coating which is characterized by being prepared from the following raw materials, by weight, 75-95 parts of high-aluminum powder, 4-7 parts of titanium dioxide, 1-2 parts of organobentonite, 1.1-2.3 parts of polybenzimidazole, 0.3-0.6 part of a 2020 thickening agent, 0.4-0.8 part of a titanate coupling agent, 0.5-1.2 parts of potassium metasilicate, 1.3-3.2 parts of polycarbonate, 19-23 parts of coal ash, 20-26 parts of waterweed, 18-27 parts of municipal sludge, 2-4 parts of rosin, 55-65 parts of ethanol and 2-5 parts of an auxiliary agent. According to the casting coating provided by the invention, modified municipal sludge is added to raw materials. Thus, production cost is reduced, the circular economic effect of changing waste into wealth is realized, and the environment is protected.

Description

A kind of modification municipal sludge cast paint and preparation method thereof

Technical field

The present invention relates to cast paint field, be specifically related to a kind of modification municipal sludge 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 modification municipal sludge 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 modification municipal sludge cast paint, it is characterized in that, be made up of the raw material of following weight portion: high-alumina fly 75-95, titanium dioxide 4-7, organobentonite 1-2, polybenzimidazoles 1.1-2.3,2020 thickener 0.3-0.6, titanate coupling agent 0.4-0.8, potassium silicate 0.5-1.2, Merlon 1.3-3.2, coal ash 19-23, pasture and water 20-26, municipal sludge 18-27, rosin 2-4, ethanol 155-165, auxiliary agent 2-5.

Described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 8-13, pearl mica 75-85, hydrotalcite 55-70, sodium phosphate trimer 0.1-0.4, organobentonite 1-2, thymol 0.2-0.4, dimethicone 2-4, 1-Methoxy-2-propyl acetate 0.3-0.6, nano silicon 0.8-2.1, brown iron oxide 3-6, polyethylene glycol oxide 2.3-3.1, brown sugar 1.2-3.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 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, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

The preparation method of described a kind of modification municipal sludge cast paint, is characterized in that comprising the following steps:

(1) put into retort calcination processing 3-4 hour at 420-530 DEG C after being dried by pasture and water together with high-alumina fly, 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, the mixed powder of obtained modification;

(2) by add after municipal sludge high-temperature calcination process modification mixed powder that above-mentioned steps obtains, coal ash, 1/4 weight ethanol stir pulping together and be heated to 140-160 DEG C, add titanate coupling agent, polybenzimidazoles, Merlon maintenance temperature stirring 1-2 hour, be cooled to 50-60 DEG C and add potassium silicate grinding 30-40 minute;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add rosin heating and stir 30-40 minute to 70-80 DEG C;

(4) titanium dioxide is dropped in reactor, add the ethanol agitation grinding 10-15 minute of surplus, add step (2), (3) product, 2020 thickeners, 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:

Cast paint provided by the invention, not only reduces modified for municipal sludge adding in raw material the recycling economy effect that production cost also achieves " turning waste into wealth ", protects environment; The cast paint utilizing the present invention to obtain have chemical stability by force, not mutability, the good advantage of gas permeability, meanwhile, its viscosity, far below existing product, can not produce material and stick, the surface integrity of casting mold cavity or core can be ensured, improve the smooth degree of product.

Detailed description of the invention

Described a kind of modification municipal sludge cast paint, it is characterized in that, be made up of the raw material of following weight portion: high-alumina fly 79, titanium dioxide 4, organobentonite 1, polybenzimidazoles 1.1,2020 thickener 0.3, titanate coupling agent 0.4, potassium silicate 0.5, Merlon 1.3, coal ash 19, pasture and water 20, municipal sludge 18, rosin 2, ethanol 165, auxiliary agent 5.

Described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 11, pearl mica 78, hydrotalcite 57, sodium phosphate trimer 0.14, organobentonite 1, thymol 0.2, dimethicone 2, 1-Methoxy-2-propyl acetate 0.3, nano silicon 1.1, brown iron oxide 3, polyethylene glycol oxide 2.3, brown sugar 1.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 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, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

Preparation method comprises the following steps:

(1) put into retort calcination processing 3-4 hour at 420-530 DEG C after being dried by pasture and water together with high-alumina fly, 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, the mixed powder of obtained modification;

(2) by add after municipal sludge high-temperature calcination process modification mixed powder that above-mentioned steps obtains, coal ash, 1/4 weight ethanol stir pulping together and be heated to 140-160 DEG C, add titanate coupling agent, polybenzimidazoles, Merlon maintenance temperature stirring 1-2 hour, be cooled to 50-60 DEG C and add potassium silicate grinding 30-40 minute;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add rosin heating and stir 30-40 minute to 70-80 DEG C;

(4) titanium dioxide is dropped in reactor, add the ethanol agitation grinding 10-15 minute of surplus, add step (2), (3) product, 2020 thickeners, 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) solid content: 26-31%;

(2) 24 hours coating suspension rates are placed: 98.34%;

(3) coating density: 1.41g/cm3;

(4) hot permeability of coating: 21cm2 (kpamin)-1;

(5) apply, dry, appearance of coat after cooling: flawless, without bubbling and the uniform coating of macroscopic pin hole.

Claims (2)

1. a modification municipal sludge cast paint, it is characterized in that, be made up of the raw material of following weight portion: high-alumina fly 75-95, titanium dioxide 4-7, organobentonite 1-2, polybenzimidazoles 1.1-2.3,2020 thickener 0.3-0.6, titanate coupling agent 0.4-0.8, potassium silicate 0.5-1.2, Merlon 1.3-3.2, coal ash 19-23, pasture and water 20-26, municipal sludge 18-27, rosin 2-4, ethanol 155-165, auxiliary agent 2-5, described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 8-13, pearl mica 75-85, hydrotalcite 55-70, sodium phosphate trimer 0.1-0.4, organobentonite 1-2, thymol 0.2-0.4, dimethicone 2-4, 1-Methoxy-2-propyl acetate 0.3-0.6, nano silicon 0.8-2.1, brown iron oxide 3-6, polyethylene glycol oxide 2.3-3.1, brown sugar 1.2-3.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 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, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

2. the preparation method of a kind of modification municipal sludge cast paint according to claim 1, is characterized in that comprising the following steps:

(1) put into retort calcination processing 3-4 hour at 420-530 DEG C after being dried by pasture and water together with high-alumina fly, 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, the mixed powder of obtained modification;

(2) by add after municipal sludge high-temperature calcination process modification mixed powder that above-mentioned steps obtains, coal ash, 1/4 weight ethanol stir pulping together and be heated to 140-160 DEG C, add titanate coupling agent, polybenzimidazoles, Merlon maintenance temperature stirring 1-2 hour, be cooled to 50-60 DEG C and add potassium silicate grinding 30-40 minute;

(3) ethanol of organobentonite and 1/5 weight is stirred, leave standstill 10-12 hour, then add rosin heating and stir 30-40 minute to 70-80 DEG C;

(4) titanium dioxide is dropped in reactor, add the ethanol agitation grinding 10-15 minute of surplus, add step (2), (3) product, 2020 thickeners, 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.