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多年来,胡家峪选矿厂根据矿石特点,改革工艺流程结构,提高了精矿品位,其效果是:增加一次粗选作业,直接产出精矿产品,将铜精矿品位由13～14%提高到17～18%;增加一次精选作业实行粗精矿难易分别精选,精矿品位由17～18%提高到21～22%;最近又增加到二次精选,将精矿品位提高到25～26%。(一)矿石性质入选矿石是低硫易选的原生硫化铜矿石。围岩主要为硅化大理岩、黑色片岩和石英片岩。主要金属矿物有:黄铁矿、黄铜矿、镜铁矿、闪锌矿、磁黄铁矿、辉铜矿、斑铜矿、铜蓝等。黄铜矿粒度一般在0.1～0.5毫米,在+0.074毫米含量占80.%以上;黄铁矿一般在0.1～0.5毫米
Over the years, Hu Jiayu beneficiation plant according to the characteristics of ore, the reform process structure, improve the concentrate grade, the effect is: an increase of roughing operations, direct production of concentrate products, the copper concentrate grade from 13 to 14% 17 ~ 18%; increase a selection of rough concentrate concentrate difficult to separate, concentrate grade increased from 17 to 18% to 21 to 22%; recently added to the second selection, the concentrate grade to 25 ~ 26%. (A) the nature of the selected ore ore is low sulfur easily selected primary copper sulfide ore. Surrounding rocks are mainly silicified marble, black schist and quartz schist. The main metal minerals are: pyrite, chalcopyrite, specular iron ore, sphalerite, pyrrhotite, chalcocite, bornite, copper blue and so on. Chalcopyrite particle size is generally 0.1 to 0.5 mm, at +0.074 mm content accounted for more than 80.%; pyrite is generally 0.1 to 0.5 mm