大宝山多金属硫化矿尾矿综合利用途径研究

大宝山是我国华南大型的含硫化矿物多金属矿山。对该矿山尾矿的研究表明，尾砂中富含黄铁矿、磁黄铁矿、闪锌矿、黄铜矿、方铅矿等金属硫化物矿物及石英、黏土等，其中金属元素Zn具有回收价值。根据尾砂的成分特征和现有尾矿回收利用技术，本研究针对大宝山金属硫化物尾矿提出一种综合利用途径，即首先对尾砂进行筛分和重选，分离轻、重矿物。针对重矿物，通过浮选富集回收金属元素Zn，通过氧化焙烧回收硫，通过氯化焙烧回收其它金属元素以及磁化回收铁矿物。重选后的轻矿物可以直接利用和筛分利用。该工艺实现尾矿资源化的同时不会对环境造成污染，可以达到无尾矿矿山的目标。

Research on the Comprehensive Utilization of Dabaoshan Polymetallic Sulfide Tailings

Dabaoshan Mine is a large polymetallic sulfide deposit in the South China.The analysis shows its tailings contain abundant metal sulfides such as pyrites, pyrrhotite, sphalerite, chalcopyrite and galena, and also quartz and clay minerals, of which the content of metal element Zn is of the recovery value.In light of the tailings composition characteristics of and the available recovery technology for tailings, a new method for recovering Dabaoshan metal sulfide tailings is proposed as a result of the research, in which, the tailings are screened and gravity-separated into light and heavy fractions.The heavy minerals are treated by flotation to recover the metal element Zn, by oxidation and roasting to recover sulfur, by chlorination-roasting to recover other metal elements and by magnetization to recover iron minerals.The light fraction of gravity separation can be directly utilized or screened prior to utilization.This process can make use of tailings as resource without polluting the environment, realizing the aim of non-tailing mine.