【摘要】 后坪磷矿是湖北省内发现的特大型磷矿床，磷矿资源量超2亿t,且P₂O₅品位较高。然而，该磷矿原矿中的倍半氧化物含量高，开发利用难度较大。本文利用矿物自动分析仪（Mineral liberation analyser, MLA）对该磷矿的工艺矿物学特征进行了分析，在此基础上开展了反浮选试验研究，结果表明：该磷矿中主要脉石矿物为钾长石、石英和白云石，有用矿物磷灰石嵌布粒度较粗，较易实现单体解离；混合反浮选流程采用十二胺和MON-135复合捕收剂，在其用量分别为500、1.5 kg/t,磨矿细度-0.074 mm占69.54%的条件下，经“1粗2扫”反浮选闭路流程，获得了P₂O₅品位为29.46%、回收率为82.04%的磷精矿；该浮选工艺药剂制度简单，泡沫易破裂，可为后坪磷矿的高效开发提供技术参考。更多还原

【Abstract】 Houping phosphate rock is a super-large phosphate deposit discovered in Hubei Province. The resource of phosphate rock is more than 200 million tons, and the grade of P₂O₅ is high. However, the content of sesquioxide in the phosphate ore is high, and it is difficult to develop and utilize. In this paper, the process mineralogy characteristics of the phosphate rock were analyzed by mineral liberation analyser（MLA）. On this basis, the reverse flotation test was carried out. The results show that the main gangue minerals in the phosphate rock are potassium feldspar, quartz and dolomite, and the useful mineral apatite has a coarse particle size, which is easy to realize monomer dissociation. The mixed reverse flotation process used dodecylamine and MON-135 composite collectors. Under the conditions of 500 kg/t and 1.5 kg/t, respectively, and the grinding fineness of-0.074 mm was 69.54%, the phosphate concentrate with P₂O₅ grade of 29.46% and recovery of 82.04% was obtained by ‘one roughing and two scavenging’ reverse flotation closed-circuit process. The reagent system of the flotation process is simple and the foam is easy to burst, which can provide technical reference for the efficient development of Houping phosphate rock.更多还原