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张家洼选矿厂所处理的矿石属高湿热液接触交代含铜、钴磁铁矿,其次为镁磁铁矿、赤铁矿、褐铁矿和可综合回收的铜,脉石矿物主要为蛇蚊石、透辉石、透闪石、方解石,蛭石等。采矿方法为无底柱分段崩落法,实际贫化率为25％左右,高的可达35％。 初步设计选矿采用球磨、自磨两段磨矿和脱泥、弱磁选、重选、浮选流程,产品为铁精矿,副产铜精矿。为了稳定和提高入选原矿品位,降低能耗,选厂于1988年4月增加了原矿预选作业,该作业包括采用电磁水冷式干选磁滑轮抛尾作业和从干选尾矿中手选回收红铁矿块作业。
The ore handled by Zhangjiawa Concentrator belongs to the high-wet hydrothermal contact metasomatism containing copper and cobalt magnetite, followed by magnesium magnetite, hematite, limonite and copper which can be synthetically recovered. The gangue minerals are mainly serpentine Mosquito, diopside, tremolite, calcite, vermiculite and the like. The mining method is a pillarless caving method with an actual depletion rate of about 25% and a high of 35%. The preliminary design beneficiation adopts ball mill, two stages of grinding and desliming from the mill, the weak magnetic separation, the re-election and the flotation process. The products are iron concentrate and by-product copper concentrates. In order to stabilize and enhance the selected ore grade and reduce energy consumption, the beneficiation plant added ore pre-selection operations in April 1988, which included the use of electromagnetic water-cooled dry magnetic pulley throwing operations and hand sorting of recovered tailings from dry tailings Iron ore work.