有色金属选矿厂浓密机排矿闸门通常选用市购生铁螺杆闸门(即标准阀)。因作业场所潮湿,极易锈蚀,造成螺杆启闭困难,操作劳动强度大、失灵等问题,往往使金属流失。东西虽小,缺少它还不行,为攻克此关键,有的矿山分别革新成功转心式、压缩式及平面式等闸门以代替螺杆闸门, Non-ferrous metal concentrator thickener discharge gate commonly used commercially available pig iron screw gate (ie standard valve). Due to the wet workplace, extremely easy to rust, causing screw opening and closing difficulties, labor-intensive operation, failure and other issues, often make the metal loss. Although small things, it is not enough to lack it, in order to capture this critical point, some mines were successfully revolving heart-type, compression and flat-type gate to replace the screw gate,