粉煤灰盐酸法提取氧化铝分离除杂技术综述

Review on Separation and Purification Technology of Alumin-A Extracted from Coal Ash by Hydrochloric Acid Method

粉煤灰中富含氧化铝,是一种潜力巨大的铝土矿替代资源。粉煤灰酸法提取氧化铝是一种可行的工艺路线,但粉煤灰中与铝共存的杂质元素影响了氧化铝的纯度,如何有效实现杂质元素的分离除杂是整个工艺实现工业化的关键点之一。文章从整体工艺流程出发,对涉及到的除杂技术的原理、适用范围、实施效果等进行描述,并对未来除杂工艺的发展方向进行了展望。

Alumina is rich in coal ash,which is a potential substitute for bauxite.Acid extraction of alumina from coal ash is a feasible technique route,but the coexistence ofimpurity elements and aluminum affect the purity of aluminum oxide,how to effectively implement the separation ofimpurity elements is one key point ofindustrialization.This paper starts from the overall process flow,then the principle of the purification technology,the applicable scope and implementation effect is discussed,the future development of purification process is prospected.