1938年大峪口选矿扩大试验、尾矿库工程地质详细勘探、磷石膏堆场水文地质初勘实行公开招标,取得了很好效果。 大峪口选矿扩大试验规模为1～2吨/日连续性试验,要求指标为磷精矿品位≥34％,回收率≥86％,镁磷比≤5％,精矿含水在30％左右,精矿成本80元/吨左右,尾矿水排放符合国家标准,要求在6月底以前完成。 元月份,我们向四家有资历单位发出了招标书,一个月之内各单位均寄来投标书。从投标的内容来看,有两个单位没有满足标书中的技术经济指标要求,且费用偏高。另外两个单位均能满足上述要求,其中一个单 Large Meiyukou ore dressing in 1938 to expand the pilot project, detailed exploration of tailings pond engineering geology, preliminary investigation of hydrogeology of phosphogypsum yard, open bidding and achieved good results. Dayukou beneficiation expansion test scale of 1 ~ 2 tons / day continuity test, the required indicators for the phosphate concentrate grade ≥ 34%, recovery ≥ 86%, magnesium and phosphorus ≤ 5%, concentrate water content of about 30% Concentrate costs 80 yuan / ton, tailings water discharge in line with national standards, requirements completed by the end of June. In January of the same month, we issued tenders to four qualified units and all units sent tenders within one month. From the bidding content, there are two units did not meet the tender technical and economic indicators, and the high cost. The other two units can meet the above requirements, one of the single