Dry phosphogypsum used specific digestion solution with microwave digestion to produce barium sulfate, the precipitation used glass sand core crucible vacuum filtering and reoccupy microwave constant for heavy precipitation. Obtained the experimental data, glass sand core crucible was low cost, using biodegradable poly epoxy succinic acid PESA ( salt) for soaking and washing, the recycling of glass sand core crucible was realized, the method was simple, analysis cycle was short, with energy saving and easy to operate, cheap instrument repairing, it was easy to promote.%干料磷石膏用特定的消解液微波消解，生成硫酸钡沉淀用玻璃砂芯坩埚负压抽滤，再用微波恒重沉淀，得出实验数据，玻璃砂芯坩埚用成本低、可降解的聚环氧琥珀酸PESA (盐)浸泡洗涤，实现了玻璃砂芯坩埚的再生利用，方法简便、分析周期短、节能易操作，仪器廉价易修，便于推广。
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