东鞍山高碳酸盐铁矿石磁选精矿浮选工艺研究

东鞍山铁矿高碳酸盐矿石中的菱铁矿常使东鞍山烧结厂的反浮选工序“精尾不分”，导致这些高碳酸盐矿石不能入选。为此，采用纯矿物配成的人工混合矿研究了菱铁矿对假象赤铁矿与石英常规反浮选的影响，并进行了人工混合矿及东鞍山高碳酸盐赤铁矿石磁选混合精矿的分步浮选试验。其中磁选混合精矿的分步浮选闭路试验在第1步正浮选时预先除去了占总量9.13%的菱铁矿，使第2步反浮选获得了铁精矿品位为66.34%、回收率为71.60%的良好分选指标，从而证明分步浮选是东鞍山高碳酸盐铁矿石的有效浮选工艺。

Research on Flotation Processing of Concentrate from Magnetic Separation of Donganshan High Carbonates-Contained Iron Ores

Siderite among Donganshan carbonates-contained iron ore usually makes the non-separation of concentrates and tailings in the reverse flotation of Donganshan Sinter Plant, resulting in the loss of the high carbonates ore. Therefore, artificial mixed minerals were adopted to investigate the effect of siderite on the reverse flotation of martite and quartz. Then, stepped flotation experiments of artificial mixed minerals and mixed magnetic concentrate of Donganshan high carbonates-contained hematite ores were carried out, where about 9.13% of siderite are removed at the first step of direct flotation in the close-circuit tests of mixed magnetic concentrate, and good index with iron concentrate of Fe grade 66.34% and recovery 71.60% was obtained in close-circuit experiment of the reverse flotation at the second step. All these approved that the stepped flotation is an effective flotation process for Donganshan high carbonates-contained hematite ore.