Coal ash casting paint

Abstract

The invention belongs to the technical field of foundry, and relates to fly ash foundry coating. The invention provides foundry coating which is prepared through taking solid waste, namely the fly ash, which is produced after coal is burned as refractory aggregate, and the foundry coating is used for various nonferrous alloys and sand molds (cores) of iron castings. The foundry coating is prepared by materials according to the following weight proportion, the fly ash wt 20-100% and refractory powder wt 0-80% are taken as the refractory aggregate, and suspension concentrate, binder, thickener and carrier liquid are added to manufacture the foundry coating. The beneficial effects of the invention are that the invention provides the fly ash with an approach of waste secondary utilization, undisturbed fly ash is processed into refractory aggregate particle sizes which can be used for the foundry coating, the fly ash foundry coating which is manufactured can be applied to various different casts, performances such as coating high temperature crack resistance, coating surface strength, gas forming amount are good, and various requirements of the forging can be satisfied.

Description

(1) Technical field [0001] The invention belongs to the technical field of casting, and relates to a fly ash casting coating, which provides a kind of sand mold for various non-ferrous alloys and iron castings prepared by using the solid waste fly ash after coal combustion as refractory aggregate. (core) of the casting coating. (2) Background technology [0002] Fly ash refers to the solid residue after coal is burned in the boiler, and its main sources are pulverized coal power generation boilers in large and medium-sized thermal power plants and pulverized coal boilers for central heating in cities. Because coal occupies a dominant position in my country's energy consumption, a large amount of fly ash will be produced every year. At present, the main treatment method of fly ash is wet stacking, which is very harmful: first, it occupies land and wastes water resources; second, it pollutes the atmosphere; third, it pollutes the surface and fresh water resources. For sustai...

AI Technical Summary

Problems solved by technology

At present, the main treatment method of fly ash is wet stacking, which is very harmful: one is to occupy land and waste water resources; the other is to pollute the atmosphere; the third is to pollute the surface and fresh water resources, etc.