The Role of Flotation Reagents in the Reverse Flotation of Carbonate-Containing Iron Ores

The Influence of pulp pH, dispersants and auxiliary collectors on reverse flotation of carbonate-containing iron ores were explored. Interactions between iron ores and quartz were theoretically analyzed by flotation solution chemistry and DLVO theory. The results indicated that the iron concentrate grade improved sharply when pH increased from 11.0 to 12.0, but changed unobviously when pH was larger than 12.0, which was related to solution chemistry of siderite and interactions among particles. Sodium tripolyphosphate was an effective dispersant and sodium dodecyl sulfate was an effective auxiliary collector of KS-III. Both recovery and grade enhanced by the action of sodium dodecyl sulfate or sodium tripolyphosphate when pH was 12.0.

高效新品种捕收剂RA—315的制取及应用研究

本文介绍高效新品种捕收剂RA—316的制取方法、生产工艺、物化常数测定及其选矿应用研究结果。RA—315捕收剂是以塔尔油(Tall oil)为主体原料,经氯化反应和氧化反应后进行进一步加工处理而得。它具有性能良好、原料来源广泛、生产工艺简单、价廉和无毒等特点。它不仅适合于作为我国鞍钢齐大山铁矿反浮选捕收剂,而且用它选别东鞍山难选铁矿、弓长岭铁矿及美国蒂尔登(Tilden)铁矿均获得了比其他药剂更为优越的经济技术指标。此外,它还可用于选别其他金属矿和非金属矿。目前,正在建设年产3000t规模的药剂工厂生产RA—315供选矿厂使用。

餐饮废油制备JZQ-F捕收剂及其铁精矿脱氟试验研究

餐饮废油作为餐厨垃圾处理过程中的产物二次食用对人类健康产生的潜在危害是众所周知的。经研究发现,餐饮废油中的成分与传统制备脂肪酸类捕收剂的原料的成分相近。通过预处理、皂化、酸化等步骤,进而合成制备出JZQ-F,红外光谱研究表明,JZQ-F是脂肪酸和脂肪酸盐的混合物,结构中含有不饱和C=O双键,在铁矿石反浮选脱氟试验中,获得了良好的浮选闭路试验指标:铁精矿中铁品位达到67.31%,铁回收率96.50%,氟品位降低到0.36%。