加拿大魁北克某铁矿选矿厂总尾矿品位8～9％,MET—CHEM公司提供该矿矿样90kg,委托北京矿冶研究总院设备研究所,用螺旋溜槽进行尾矿再选探索试验。该矿样为选矿厂的尾矿经旋流器分级后的溢流产品,粒度为-0.104mm,品位为17％左右,有用金属主要分布在细粒中,-40μm+20μm粒级中铁品位20％左右。选别工艺为一粗一精两段选别,采取单机试验。用(?)600mm螺旋溜槽进行粗选和精选。由于矿样太少,采用开路流程,即粗选后的中矿及精选后的中、尾矿均不返回原流程,这样就影响了总的回收率。 Canada, Quebec, an iron ore beneficiation plant total tailings grade 8 ~ 9%, MET-CHEM company to provide the ore sample 90kg, commissioned by Beijing Institute of Mining and Metallurgical Equipment Institute, with spiral chute tailings re-exploration test. The ore sample is the overflow product of the tailings of the concentrator after cyclone grading, the grain size is -0.104mm, the grade is about 17%, the useful metals are mainly distributed in the fine grains, and the grain size of the iron with the size of -40μm + 20μm is 20 %about. Selection process for a rough and a fine two-selections, take a stand-alone test. Use (?) 600mm spiral chute rough selection and selection. As the mine is too small, the use of open-loop, that is, after the roughing of the mine and the selected after the tailings are not returned to the original process, thus affecting the overall recovery rate.