A novel collector 2-(4-Butoxyphenyl)acetohydroxamic acid (BAHA) was actively considered in the flotation of rhodochrosite. Flotation behaviors and BAHA adsorption concerning rhodochrosite, calcite and dolomite were systematacially investigated through microflotation tests, adsorption experiments, zeta potential measurements, FTIR and XPS analyses. Microflotation results showed that rhodochrosite performed a better floatability than calcite and dolomite at pH 8.0–10.0. Also, the adsorption amounts of BAHA collector on the rhodochrosite surface were obviously greater than those of calcite and dolomite. The results of zeta potential, FTIR and XPS analyses indicated that BAHA adsorbed onto rhodochrosite surfaces through chemisorption, electrostatic attraction and intermolecular hydrogen bonding, chemisorption and electrostatic attraction for calcite, and only chemisorption for dolomite. The interaction mechanisms between BAHA collector and mineral surfaces were responsible for the differences in the BAHA adsorption and floatability between rhodochrosite and two gangues. The flotation separation tests of three minerals confirmed that the rhodochrosite concentrate with Mn grade of 24.64% and recovery of 87.94% could be obtained. BAHA is a high selective collector and can realize the flotation separation of rhodochrosite against dolomite and calcite.

一种新型捕收剂 2-(4-丁氧基苯基) 乙酰异羟肟酸 (BAHA) 在菱锰矿的浮选中被积极考虑。通过微浮选试验、吸附实验、zeta 电位测量、FTIR 和 XPS 分析，系统地研究了菱锰矿、方解石和白云石的浮选行为和 BAHA 吸附。微浮选结果表明，在 pH 8.0–10.0 时，菱锰矿的可浮性优于方解石和白云石。此外，BAHA 捕收剂在菱锰矿表面的吸附量明显大于方解石和白云石。Zeta电位、FTIR和XPS分析结果表明，BAHA通过化学吸附、静电引力和分子间氢键作用吸附在菱锰矿表面，对方解石的化学吸附和静电引力，并且仅对白云石进行化学吸附。BAHA 捕收剂与矿物表面之间的相互作用机制是导致菱锰矿和两种脉石之间 BAHA 吸附和可浮性差异的原因。三种矿物的浮选分离试验证实，可得到锰品位为24.64%、回收率为87.94%的菱锰矿精矿。BAHA是一种高选择性捕收剂，可实现菱锰矿与白云石、方解石的浮选分离。64%，回收率为 87.94%。BAHA是一种高选择性捕收剂，可实现菱锰矿与白云石、方解石的浮选分离。64%，回收率为 87.94%。BAHA是一种高选择性捕收剂，可实现菱锰矿与白云石、方解石的浮选分离。