What is quartz powder coating modification?

The coating modification of quartz powder is a method of surface modification by using polymers or resins to "film" the surface of quartz powder. For example, coating quartz sand with phenolic resin to improve the bonding performance of fine casting sand. This coated casting sand can not only achieve high investment casting speed, but also maintain high resistance to shell rolling and cracking during mold and core production; Quartz sand coated with furan resin can be used for oil well drilling to increase oil well production.