新型硫抑制剂HD12替代石灰的试验研究

Experimental Study of Novel Surfur Depressant HD12 Replacing Lime

内蒙古锡盟地区含锌硫化矿石含锌1.46%、含铁22.07%。矿石中主要金属矿物为闪锌矿、磁铁矿、黄铁矿和磁黄铁矿等,主要脉石矿物为石英、钙铁石榴石、方解石、云母、闪石等。为解决该矿石浮选过程中大量使用石灰所导致的安全、环保等问题,采用自主研发的新型硫抑制剂HD12替代石灰,开展了浮选试验研究。在磨矿细度为-0.074 mm占75%的条件下,通过条件试验确定锌粗选适宜的药剂制度为:HD12用量10 g/t,硫酸铜用量240 g/t,丁基钠黄药用量80 g/t。在此基础上,采用“1粗2精3扫”的闭路浮选工艺流程处理该矿石,获得了锌品位50.04%、锌回收率88.97%的锌精矿,实现了含锌硫化矿中锌资源的高效回收。HD12为硫抑制剂时锌选别指标优异,同时显著降低了药剂用量,可替代石灰用于闪锌矿与黄铁矿、磁铁矿的分离。

The zinc sulfide ores in Ximeng area of Inner Mongolia contains zinc of 1.46%and iron of 22.07%.The main metallic minerals in ores are sphalerite,magnetite,pyrite and pyrrhotite.The gangue minerals in ores are mainly quartz,calcium iron garnet,calcite,mica and amphibole.In order to solve the safety and environmental problems caused by the large amount of lime used in the flotation process of the ore,an novel surfur depressant HD12 was used to replace lime and the beneficiation experiment was carried out.The appropriate reagent system was determined by condition tests as follow:HD12 of 10 g/t,copper sulfate of 240 g/t,sodium butyl xanthate of 80 g/t in the grinding fineness of-0.074 mm accountng for 75%.On this basis,the closed-circuit flotation process of"one roughing flotation,two cleaning flotation and three scavenging flotation"was adopted to treat the ore.Finally,the zinc concentrate with Zn grade of 50.04%and Zn recovery rate of 88.97%could be obtained.The efficient recovery of zinc resources from the zinc sulfide ores is realized.Using HD12 as a sulfur inhibitor,the zinc separation index is excellent,and the dosage of the reagent is significantly reduced,which could replace lime for the separation of sphaler-ite from pyrite and magnetite.