The refinement of product mirabilite is an improvement of the mirabilite extraction by thermal process. It bas an effect on brine purification and mirabilite extraction without changing the technological process.

• 产品芒硝的精制是对热法提硝的改进，它在不改变原有工艺流程的前提下，通过产品精制取得了卤水净化提硝的效果。