Sintered strippable light-colored casting coating and preparation method thereof

The invention discloses and provides a sintered strippable light-colored casting coating which is wide in application range, pollution-free, low in cost and good in sintering stripping performance and stability, and a preparation method thereof. The coating provided by the invention completely does not contain graphite powder; composite zirconium-containing silicate mineral powder is adopted as a main fireproof base material and a suspending agent, a bonding agent, a de-foaming agent and the like are added at the same time; the raw materials are low in price and sufficient in source; the coating is excellent in sintering stripping performance, sand bonding resistance and suspension stability, unlikely to generate deposits in long-term storage and transportation processes, low in production cost and free of environmental pollution, and can be used for producing various cast steel parts and various cast iron and non-ferrous cast parts; especially the sintering stripping performance of the coating is wide in adaptability and breaks through the limitation of narrow adaptation range of the sintering stripping performance ubiquitous in a conventional sintered strippable coating. The coating is applied in the technical field of casting coatings.