33results about How to "Good sand resistance" patented technology

The invention discloses a cast steel alcohol-based paint, as well as a preparation and application method thereof. The cast steel alcohol-based paint comprises the following components: 12-18 wt% of ethyl alcohol, 4.5-8 wt% of isopropanol, 0.4-2.5 wt% of black rosin, 0.35-3 wt% of solvent naphtha, 0.9-2.5 wt% of aluminium-magnesium silicate, 0.5-2.6 wt% of phenolic resin, 0.05-0.5 wt% of poval, 0.1-1 wt% of white carbon black, 0.15-2.5 wt% of attapulgite, 40-60 wt% of zircon powder, 10-25 wt% of fused alumina zirconia powder, 0.1-0.5 wt% of kunzite, 0.8-2.5 wt% of ludox and 0.5-3.5 wt% of pyrophyllite powder. The specific preparation and application method are shown in the specification. The cast steel alcohol-based paint has the following benefits: the refractoriness is high, sintering is easy, and the sand burning resistance is good; in addition, the solid content is high, the suspension property is good, the gas content is low and excellent thixotropic property is realized; moreover, after a coating is hardened, the strength is high, and the hygroscopicity resistance is good.

The invention relates to alcohol-based coating for large castings and a preparation method of the alcohol-based coating, in particular to casting coating for large nuclear power steel castings for basic phenolic resin sand molding production, and belongs to the field of casting coating. The casting coating is prepared from modified zirconium powder, lithium-based bentonite paste, magnesium aluminum silicate paste, alcohol soluble alky acid modified resin, modified rosin, low-viscosity polyvinyl butyral resin and carrier liquid. As for the coating, the suspension property (24 hours) is larger than 98%, the adhesive force is level 1, the gas volume is smaller than 10 ml / g, the solid content is larger than 73%, the coating abrasion performance is 0.06 g, and no burnt-on sand exists on the surfaces of the nuclear power castings of 200 tons of molten steel or above.

The invention relates to a quick-drying water-based casting coating for large steel castings and a preparation method thereof, and belongs to the technical field of foundry coatings. The quick-dryingwater-based casting coating for the large steel castings comprises the following materials, by mass, 100 parts of modified zircon powder, 1 to 5 parts of lithium-based bentonite paste, 1 to 5 parts ofaluminum magnesium silicate paste, 0.2 to 3 parts of water-soluble modified phenol resin, 0.1 to 1 part of water-soluble modified silicone resin, 0.1 to 0.5 part of the low-viscosity polyvinyl butyral resin and 20 to 40 parts of water. The quick-drying water-based casting coating for the large steel castings is characterized in that the suspension property is higher than or equal to 98% / (24H), the gas generation amount is smaller than 5 ml / g, the solid content is larger than 73%, the coating wear resistance is 0.02 g, coating is smooth without flowing, baking and coating can be repeatedly carried out many times, the baked coating is fully dried, the coating has no defects such as cracks, bubbles, pores and delamination, and the good sand resistant function is achieved during molten steelerosion and etching.

The invention discloses a magnesium aluminum spinel powder alcohol-based coating for heavy section steel castings, and relates to a casting coating. The alcohol-based coating comprises the following components in percentage by weight: 55 to 60 percent of magnesium aluminium spinel powder, 0.5 to 1.2 percent of binder, 0.11 to 0.18 percent of suspended thickening agent, 1.1 to 1.8 percent of suspending agent, 2.7 to 4.2 percent of fluxing agent, and the balance of organic solvent. In the magnesium aluminum spinel powder alcohol-based coating, the particle size of the magnesium aluminum spinel powder is between 270 and 320, and Al2O3 is more than or equal to 78 percent. The magnesium aluminum spinel powder is synthesized by electric smelting technology, has the characteristics of low expansion and high smelting point, and meets the requirement of serving as refractory aggregate of the coating for the steel castings; and the magnesium aluminum spinel powder has obvious price and resource advantages than zircon powder.

The invention provides an environment-friendly alcohol group ceramic casting coating. The environment-friendly alcohol group ceramic casting coating comprises, by weight, 250-350 parts of high-alumina powder, 50-150 parts of silica powder, 150-200 parts of pyrophillite powder, 30-50 parts of cosolvent, 20-30 parts of suspending agents, 8-15 parts of binding agents, 1-3 parts of surfactant and 250-350 parts of solvent. The environment-friendly alcohol group ceramic casting coating overcomes the defects in the prior art and is high in refractoriness, good in sintering stripping effect, low in price and excellent in comprehensive performance.

The invention discloses a cast steel alcohol-based paint, as well as a preparation and application method thereof. The cast steel alcohol-based paint comprises the following components: 12-18 wt% of ethyl alcohol, 4.5-8 wt% of isopropanol, 0.4-2.5 wt% of black rosin, 0.35-3 wt% of solvent naphtha, 0.9-2.5 wt% of aluminium-magnesium silicate, 0.5-2.6 wt% of phenolic resin, 0.05-0.5 wt% of poval, 0.1-1 wt% of white carbon black, 0.15-2.5 wt% of attapulgite, 40-60 wt% of zircon powder, 10-25 wt% of fused alumina zirconia powder, 0.1-0.5 wt% of kunzite, 0.8-2.5 wt% of ludox and 0.5-3.5 wt% of pyrophyllite powder. The specific preparation and application method are shown in the specification. The cast steel alcohol-based paint has the following benefits: the refractoriness is high, sintering is easy, and the sand burning resistance is good; in addition, the solid content is high, the suspension property is good, the gas content is low and excellent thixotropic property is realized; moreover, after a coating is hardened, the strength is high, and the hygroscopicity resistance is good.

The invention discloses high-breathability alcohol-based evaporative pattern coating. The high-breathability alcohol-based evaporative pattern coating comprises the following raw materials in percent by mass: 20-40% of an alcohol-based solvent, 40-60% of refractory aggregates, 0.5-5% of polyvinyl formal, 0.5-5% of silica sol, 0.5-5% of a suspending agent, 0.05-0.2% of a surfactant and 0.1-1% of an auxiliary agent, altogether 100%. The invention further discloses a preparation method of the high-breathability alcohol-based evaporative pattern coating. The high-breathability alcohol-based evaporative pattern coating is prepared by mixing the weighed raw materials according to a certain adding sequence and uniformly stirring the raw materials. The high-breathability alcohol-based evaporative pattern coating can achieve a rapid self-drying effect in the case of no drying; when the added polyurethane foam microbeads or foamable polymethyl methacrylate microbeads encounter high temperature in the casting process, liquid metal is gasified and small holes are formed in a coating layer, so that the breathability of the high-breathability alcohol-based evaporative pattern coating is greatly improved; the high-breathability alcohol-based evaporative pattern coating is good in adhesion and sand-sticking resistance.

The invention provides a method for producing precise foundry sand from high-aluminum coal ash. The method comprises the following steps of: purifying high-aluminum coal ash, pelletizing, drying, roasting and post-treating the purified high-aluminum coal ash to obtain the precise foundry sand, wherein the step of purifying the precise foundry sand adopts an acid activation-alkali desilicication-diluted acid washing process. The precise foundry sand obtained by the method has the advantages of good mobility, high refractoriness, high strength, a low thermal expansion coefficient, good sand sticking resistance, solves the raw material problem in a production process of the precise foundry sand, successfully treats industrial solid waste, achieves the purpose of changing waste into things of value, and has a good economic and social value.

The invention relates to a manufacturing method in a production technique of paint for casting, in particular to a production technique of sand-type water based paint for casting, wherein the sand-type water based paint belongs to a casting accessory. The production technique comprises the following steps of: adding water, tributyl phosphate and CMC (carboxy methylated cellulose) in a dissolving pot firstly, stirring uniformly, dissolving the materials completely; filtering insoluble materials by a filter screen; adding water, sodium benzoate, a sodium base bentonite suspending agent, acetic acid and reducing glue in a stirring kettle, starting up electric stirring; slowly adding white corundum, sodium lignin sulfonate and water in the stirring kettle, stirring for 15-20min; adding water on the basis of the dilution situation, wherein the baum degree of the paint is higher than 95 after being stirred uniformly; transferring the paint prepared by the steps in a colloid mill, continuously milling for 2h, discharging and packaging into barrels to obtain the paint. The invention provides the novel production technique of the sand-type water based paint for casting, which has the following characteristics of environment friendliness, high coating strength and excellent painting property.