聚硅酸铁浮选抑制煤系黄铁矿的研究

The depression characteristics of polymers of ferric-polysilicate on coal-pyrite during flotation

将自制的具有良好稳定性的、不同铁硅比的聚硅酸铁作为煤系黄铁矿的抑制剂,在自制微型浮选柱中进行了系列浮选试验,发现聚硅酸铁对煤系黄铁矿有良好的抑制作用,在适当的铁量和聚合时间下,黄铁矿的抑制率最高可达80%以上.聚合时间、铁量是决定聚硅酸铁抑制性能的关键因素,最佳聚合时间是3-13 d,最佳铁量是3-5 kg/t.硅量对抑制效果也有一定的影响,硅量较大的抑制效果较好.

Polymers of ferric-polysilicate （PFS） of different Fe/Si mole ratio, with good stability, were prepared and applied in the flotation of coal-pyrite as a depressant. All the experiments were carried out in flotation mini-column made in laboratory. These PFS products showed extremely significant depression effect on the coal-pyrite flotation. The depression ratio can reach 80% or more when iron consumption and curing time are both proper. It is almost certain that iron consumption and curing time are the most critical factors determining PFS＇ s depression characteristics. The most proper curing time is between 3 to 13 days. The most effective iron consumption is about 3 to 5 kg/t. The silicon consumption has some effect on the depression characteristics of PFS since greater silicon consumption showed slightly better depression effect on coal-pyrite.