国外某滨海砂矿锆钛高效回收选矿试验研究

Experimental Study on High Efficiency Recovery of Zirconium and Titanium from a Coastal Placer A broad

国外某海滨砂矿中TiO_(2)、ZrO_(2)含量分别为7.55%和0.74%,其中钛主要以钛铁矿、金红石等工业可利用矿物形式存在,锆主要以锆英石形式存在,嵌布粒度范围主要集中在0.04~0.16 mm,属于物理选矿适宜回收的粒度范围,是典型的锆钛共生砂矿。针对该矿,进行了工艺矿物学和选矿小型试验研究,采用“锆钛矿物重选预富集—钛铁矿与非磁性锆钛矿物磁选分离—锆钛矿物重选再富集—金红石与锆英石干式磁电选分离”的全工艺流程,分别获得了钛品位大于52%的钛铁矿精矿、钛品位大于77%的含铁金红石精矿、钛品位大于75%的金红石精矿以及锆品位大于63%的锆英石精矿,钛锆回收率分别达到了81%和74%,实现了该矿床中钛锆资源的高效利用,可为同类矿山的开发利用提供借鉴。

The content of TiO_(2)and ZrO_(2)in a coastal placer abroad reached 7.55%and 0.74%respectively.Titanium mainly existed in the form of ilmenite,rutile and other industrial usable minerals,zirconium mainly existed in the form of zircon,and the embedded particle size range was mainly 0.04-0.16 mm.It belonged to the particle size range suitable for physical ore dressing and was a typical zirconium titanium symbiotic placer.A small-scale experimental study on process mineralogy and beneficiation was carried out.Using the whole process of“gravity concentration and preconcentration of zirconium and titanium minerals-magnetic separation of ilmenite and non-magnetic zirconium and titanium minerals-gravity concentration and preconcentration of zirconium and titanium minerals-dry magnetoelectric separation of rutile and zircon”,ilmenite concentrate with titanium grade of more than 52%,rutile concentrate with titanium grade of more than 77%iron,rutile concentrate with titanium grade of more than 75%and zirconium concentrate with zirconite grade of more than 63%were obtained respectively.The recoveries of titanium and zirconium were up to 81%and 74%,realizing the efficient utilization of titanium and zirconium resources in this deposit,which could provide reference for the development and utilization of similar mines.