Method for removing impurity barium in crystallization layer of waste quartz crucible, method for preparing high-purity quartz sand and high-purity quartz sand

The invention relates to a method for removing impurity barium in a crystallization layer of a waste quartz crucible, a method for preparing high-purity quartz sand and the high-purity quartz sand, and the method for removing impurity barium comprises the following steps: S1, separating the crystallization layer of the waste quartz crucible from a waste quartz crucible body to obtain the separated crystallization layer; s2, performing acid corrosion on the separated devitrification layer to obtain a corroded devitrification layer; the acid used in the acid corrosion is one of hydrochloric acid, sulfuric acid or hydrofluoric acid. According to the method, the crystallization layer on the surface of the waste quartz crucible is separated from the quartz crucible body, and then the crystallization layer is subjected to acid corrosion purification treatment, so that the impurity barium element in the crystallization layer of the waste quartz crucible can be fully removed. 本公开涉及一种废石英坩埚析晶层中杂质钡的去除方法及制备高纯石英砂的方法和高纯石英砂