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石门东山峰磷矿开采条件好,具备建设大型矿山的条件。有用矿物为胶磷矿,P_2O_5含量偏低,矿石须经选矿富集后才能作高浓度磷肥的原料;这种矿石的选矿处理流程复杂,选别指标也不理想,如含P_5O_5 15.13％的原矿,选别后得含P_2O_5 29～30％、MgO4％的精矿,必须再作处理,才能供制磷酸所用。在浮选中,药剂耗量大,单碳酸钠就需10公斤/吨以上,所得磷精矿制磷酸浓度低,并过滤困难。针对石门磷矿品位低、含镁高的特点(MgO达8～10％),烧制钙镁磷肥是适宜的。在矿山原矿就地进行筛分,大部份块矿可作钙镁磷肥的原料,或作商品矿出售。余下
Shimen Dongshan phosphate rock mining conditions are good, with the conditions for the construction of large-scale mines. The useful minerals are colloidal phosphate rock and the content of P2O5 is low. The ore should be enriched by beneficiation before it can be used as the raw material of high concentration phosphate fertilizer. The beneficiation process of this ore is complicated and the sorting index is not ideal. For example, the crude ore containing 15-50% P5O5 , After the election to have P_2O_5 29 ~ 30%, MgO4% of the concentrate, we must make further treatment, for the preparation of phosphoric acid used. In the flotation, the consumption of large pharmaceutical, sodium carbonate on the need to 10 kg / ton, resulting in phosphoric acid phosphoric acid concentration is low, and filtering difficult. For Shimen phosphate rock low grade, high magnesium characteristics (MgO up to 8 ~ 10%), calcined magnesium phosphate is appropriate. Mine in the mine on-site screening, most of the lumps can be used as raw material of calcium magnesium phosphate, or for sale of commercial mines. The rest