混合捕收剂浮选难选钛铁尾矿

研究了油酸钠、硬脂酸钠和现场混合药剂FH三种捕收剂单独及混合作用于钛铁矿纯矿物、人工混合矿的浮选行为。探究了混合捕收剂对六安钛铁尾矿浮选行为的影响。结果表明 油酸钠与硬脂酸钠混合以及油酸钠与FH混合后浮选效果增强, 产生正协同作用, 药剂的最佳混合比例分别为7∶3和5∶5。当钛铁矿矿浆浓度为40%, FH油酸钠混合药剂用量为750 g/t, 硫酸用量为1 250 g/t 时, 钛铁矿回收率和品位分别为67.14%和32.60%, 相比单独使用两种捕收剂, 回收率分别提高了16.89%和8.97%, 品位分别提高了11.95%和6.02%。

Flotation of Refractory Ilmenite Tailings with Mixed Collectors

The flotation behaviors of pure ilmenite mineral and artificial mixed mineral were studied with the presence of single or mixed collectors including sodium oleate, sodium stearate and a mixed collector (FH). The effect of mixed collectors on the flotation behavior of the ilmenite tailings was investigated. The results showed that, using a mixture of sodium stearate and sodium oleate, or a mixture of FH and sodium oleate, the flotation efficiency was improved, testifying a positive synergistic effect generated between these collectors, and two kinds of mixed reagents are optimally in the ratio of 7∶3 and 5∶5, respectively. Testing with a pulp density of 40%, dosage of FH-sodium oleate mixture and sulfuric acid at 750 g/t and 1 250 g/t, respectively, resulted in an ilmenite with grade of 32.60% at a recovery of 67.14%, achieving an increase of 16.89% and 8.97% respectively in recovery, and an increase of 11.95% and 6.02% respectively in grade compared with a separate addition of FH and sodium oleate.