一种用霞石正长岩提铝硅钙渣制备硅灰石的新方法

A new way for preparing wollastonite by sintering alumina-extracted residue of nepheline syenite

在充分考虑了云南个旧霞石正长岩硅钙渣的物质组成特点的基础上，不添加额外的硅源和钙源，以较低的温度（800～900℃），煅烧1h，将个旧霞石正长岩硅钙渣合成为质量分数80％～85％的硅灰石。制品符合中国行业标准DZ／T0207-2002的要求。

By sintering alumina-extracted residue of nepheline syenite at lower temperature（ 800 - 900℃ ） for 1 hour a product containing 80% - 85% （mass ratio） of wollastonite is synthesized. The product can meet the Geology and Mineral Resources Industry Standard DZ/T 0207-2002 well.