四川广旺地区石煤资源开发利用研究

四川广旺含钒石煤主矿层属品位较富的钒矿资源，研究表明石煤中钒主要以Ｖ（Ⅲ）形式赋存于粘土矿物里。提钒过程中，焙烧是关键。它直接影响石煤中Ｖ（Ⅲ）向Ｖ（Ｖ）的价态转化率（ηｖ（ｖ））、Ｖ（Ｖ）进一步向可溶性的钒的转化率（η焙）及钒的浸出与沉淀。采用复合钠盐（ＮａＣｌ＋Ｎａ２ＳＯ４）焙烧比单一钠盐可提高焙烧转化率２％－５％。焙烧过程中钒的价态转化率与焙烧转化率存在着内在联系。

STUDY ON THE TECHNOLOGY FOR UTILIZATION OF VANADIUM BEARING CARBONACEOUS SHALE IN GUANG WANG DISTRICT OF SICHUAN

Vanadium bearing carbonaceous shale in Guang Wang of Sichuan is more rich vanadium ore. The results of a series of studies indicate that vanadium in carbonaceous shale is mainly occurred in clay minerals in V(Ⅲ) form. Roasting is the key factor in the process of extracting vanadium from carbonaceous shale. It affects directly the oxidization rate (η v(v) ) of V(Ⅲ) into V(V), the ratio (η roasting ) of dissolvable vanadium and all vanadium in products roasted, and leaching and depostion of vanadium. Using mixture of NaCl and Na 2SO 4(2.5∶1)to replace NaCl, the η roasting have been raised by 2%-5%. There are internal relation between both η v(v) and η roasting , the η roasting may be enhanced only when the η V(V) raised.