冀南邯-邢地区中小规模铁选厂选矿技术特征

冀南邯-邢地区中小规模铁选厂破碎阶段多采用两段破碎工艺,破碎设备主要为颚式破碎机。最终破碎产品粒度较大,最大粒度不小于50mm。破碎阶段普遍配置磁滑轮干式预选。采用开路磨矿或闭路磨矿,磨矿段数为一段或两段,磨矿设备多采用中小规格湿式球磨机。广泛采用高频细筛进行分级,部分选厂采用螺旋分级机。采用两段或三段磁选,磁选设备为永磁筒式磁选机,型号多样。选别流程有直接磁选和阶段磨矿阶段磁选等方式。精矿脱水采用真空过滤机或沉降池,尾矿处理采用直接排放、水力旋流器浓缩排放或浓缩过筛后固态堆存。该地区铁选厂选矿技术还有有很大的发展空间。

The mineral processing technology characteristics of middle and small size concentrators for Iron ore separation in Handan-Xintai area,south Hebei province

Two-stage crushing and jaw crusher are used in the technological process in middle and small size concentrators in Handan-Xintai area,south Hebei province.The maximum partical size of crushed product is not less than 50mm.Dry magnetic separation is used in the crushing stage.Open or closed circuit grinding,one-stage or two-stage grinding,as well as middle and small type ball mills are used in grinding stage.High frequency fine screen and mechanical classifier are the most commom used classifier.Two-stage or three-stage magnetic separation with permanent drum magnetic separators is used in the technological process.Separation directly and stage grinding & separation are the separation process.Vaccum filter or subside pool is widely adopted in concentrate dewatering progress.Tailing dosposal methods are as follows:discharge directly,discharge after concentrate with hydrocyclone and storage after concentrate and screening.There is a broad developing space on mineral processing technology of middle and small size concentrator in Handan-Xintai area,South Hebei province.