铌钙矿及其主要脉石矿物浮选的抑制与分离

Depression and Separation of Fersmite and Dominant Gangue by Floatation

用 4种抑制剂研究铌钙矿及其主要脉石矿物的浮选工艺。结果表明 ,淀粉对铌钙矿的抑制强于褐铁矿 ,可用于从粗选精矿中反浮选除去褐铁矿。六偏磷酸钠 ,草酸和羧甲基纤维素 3种抑制剂都可选择性地抑制白云石 ,选择性抑制效果顺序为 :六偏磷酸钠 >羧甲基纤维素 >草酸。六偏磷酸钠用量为 1 0mg/L时 ,白云石上浮率降至 3 0 %以下。羧甲基纤维素对铌钙矿没有抑制作用 ,草酸选择性相对较差。

The floatation process of the fersmite and its intergrowth gangue is investigated with 4 depressants. The depression effect of starch on fersmite is much stronger than that on limonite, it can be used in reverse flotation of the fersmite concentrate for removal the limonite. The hexmetaphosphate, oxalic acid and methycellulose are the selective depressants for dolomite, and the sequence of the selectivity is hexmeta phosphate>methycellulose>oxalic acid. The recovery of the dolomite is less than 3 0% while the dosage of the hexmetaphosphate is 1 0mg/L. There is no depression effect of methycellulose on fersmite, and the selectivity of the oxalic acid is weaker. And the flowsheet with 2 stage direct floatation and 1 stage reverse floatation for the fersmite recovery is recommended.