摘要
湖南某锡多金属矿石矿物组成复杂,主要有价金属矿物为锡石、方铅矿、脆硫锑铅矿、黄铜矿和闪锌矿,主要脉石矿物为石英、黄玉、长石、云母、绿泥石。矿石中的锡石呈粗细不均匀嵌布,碎磨过程中易过粉碎。为了提高矿石中锡石的回收效果,以试验结果和原生产工艺为依据,对新建系统的选锡工艺进行了优化设计。设计采用高频细筛为分级设备,以减少锡石的过粉碎;采用分级重选工艺,以改善锡石的摇床分选效果;对于重选难以回收的微细粒锡石,采用脱泥后浮选+离心选矿机精选工艺进行回收,获得了锡品位55%、回收率68.4%的综合锡精矿,生产指标和经济效益均优于原工艺。
The mineral composition of a tin polymetallic ore in Hunan Province is complex,among which the main valuable metallic minerals are cassiterite,galena,brittle antimonite,chalcopyrite and sphalerite,and the main gangue minerals are quartz,topaz,feldspar,mica and chlorite.The cassiterite in the ore is distributed unevenly and easy to be crushed in the grinding process.In order to improve the recov ery effect of cassiterite,in the new system,the SnO2 beneficiation process was optimized based on the test results and the original production process.High frequency fine screen was used as classification equipment to reduce the overcrushing of cassiterite.The classification-gravity separation technology was introduced to improve the separation of cassiterite by shaking.For the microfine cassiterite which was difficult to be recov ered by gravity separation,the tin concentrate with Sn grade of 55%and recovery rate of 68.4%was ob tained by flotation-centrifuge separator cleaning process after desliming.The production indexes and eco nomic benefits by the new process are better than those by the original process.
作者
胡晖
张政军
HU Hui;ZHANG Zhengjun(Changsha Non-ferrous Metallurgical Design and Research Institute Co.,Ltd.)
出处
《现代矿业》
CAS
2023年第4期119-122,共4页
Modern Mining
关键词
锡多金属矿石
筛分
分级
重浮联合选矿
tin polymetallic ore
screening
classification
gravity-flotation combination beneficiation
