某磁选铁精矿浮选柱阳离子反浮选试验

冀东某选矿厂磁选铁精矿粒度较细(-0.074 mm占91.60%),铁矿物单体解离度高达94.4%,且在细粒级明显富集。为了进一步提高该精矿铁品位,以现场流程精矿为试样、以微泡逆流接触式浮选柱为分选设备、以GE-609为阳离子反浮选捕收剂,进行了提铁降硅试验。结果表明,在粗选给矿浓度为35%、给矿速度为893 mL/min、GE-609用量为60 g/t、充气量为2.0 L/min、泡沫层高度为30 cm情况下,采用1粗2扫、中矿顺序返回流程处理该试样,可获得铁品位为68.12%、铁回收率为98.88%的铁精矿,尾矿铁品位仅为9.92%,表明微泡逆流接触式浮选柱和阳离子捕收剂GE-609适用于该试样的反浮选提铁降硅。

Cationic Reverse Flotation of a Magnetic Iron Concentrate Using Flotation Column

The magnetic iron concentrate (91.60% -0.074 mm) of an iron plant in eastern Hebei province is fine disseminated.Its degree of iron liberation reaches 94.4%，and is obviously enriched in fine fractions.In order to increase the iron grade of the concentrate，iron increase and silicon reduction experiments was carried out with on-site concentrate as the object，micro-bubble countercurrent contacting flotation column as equipment，and GE-609 as the cationic reverse flotation collector.The results showed that iron concentrate with iron grade of 68.12%，recovery of 98.88% were obtained with pulp density of 35%，feeding speed of 893 mL/min，GE-609 dosage of 60 g/t，inflating volume of 2.0 L/min，foam layer of 30 cm through process of one roughing，two scavenging，middles back to the flow-sheet in turn,and 9.92% iron in iron tailings.It indicates that it is rational to deal the ore with micro-bubble countercurrent contacting flotation column and cationic collector GE-609.