北洺河铁矿稳定铁精矿产品质量的实践

北洺河铁矿选矿厂投产初期,由于选矿工艺流程不太完善,使得铁精矿产品质量不太稳定。针对这一问题,通过详细的原因分析、要因确认、制定整改方案、实施改造措施等一系列过程,现在能稳定生产出66.5%品级的铁精矿,取得相当可观的经济效益和社会效益。

盘式真空过滤机在铁精矿脱水作业中的应用

通过对铁精矿物料性质分析,用盘式真空过滤机进行室内脱水实验,实验结果表明盘式真空过滤机的滤饼水分小于11%。通过工业生产实现了降低铁精矿产品外运水分的目标,全年可减少损失13万元,表明盘式真空过滤机是降低细粒铁精矿过滤水分的有效设备。

Fe extraction from high-silicon and aluminum cyanide tailings by pretreatment of water leaching before magnetic separation

Pretreatment of high content of Si- and Al-containing cyanide tailings by water leaching to remove some impurities, such as the major impurities minerals of Si and A1, as well as its effect on Fe extraction in the water leaching process was investigated. The effects of different parameters on iron recovery were studied, and the reaction parameters were proposed as follows： sodium carbonate content of 30%, water leaching at 60 ~C for 5 min, liquid/solid ratio of 15：1, and exciting current of 2 A. Under these optimal conditions, magnetic concentrate containing 59.11% total iron and a total iron recovery rate of 76.12% was obtained. In addition, the microstructure and phase transformation of the process of water leaching were studied by X-ray powder diffraction technique （XRD）, Electronic image of backscattering （BEI）, X-ray fluorescence （XRF）, and energy dispersive spectrometry （EDS）. The results indicate that the soluble compound impurities generated in the roasting process are washed out, and the dissoluble substances enter into nonmagnetic materials by water leaching, realizing the effective separation of impurities and Fe.

国产辊套对程潮铁矿球团厂进口辊压机的修复效果

程潮铁矿球团厂采用中钢安徽天源科技股份有限公司生产的辊套对辊面磨损后的德国洪堡公司产RP—P3．6—120／50B型辊压机进行修复，不仅节约了3／4的修复费用并大大缩短了修复周期，而且修复后辊压机的使用效果与辊面未磨损时相当，即辊磨铁精矿的比表面积平均可比未辊磨铁精矿的比表面积增大320cmZ／g，辊磨铁精矿所制生球的落下强度可比未辊磨铁精矿所制生球的落下强度提高1．2—2．5次。