In this paper, oleate sodium (NaOL) and benzohydroxamic acid (BHA) was introduced as a mixed collector for diaspore ores. The flotation behavior and the adsorption mechanism of mixed NaOL/BHA collector to diaspore and kaolinite was investigated by flotation tests, FTIR spectra analysis, zeta potential analysis, surface tension analysis and foam performance tests. The flotation results demonstrated that compared to NaOL, mixed NaOL/BHA collector exhibited superior collecting property and selectivity to diaspore against kaolinite. In detailed, the recovery of kaolinite reduced by 20.01% and the aluminum–silicon ratio (A/S) increased by 9.42 in micro-flotation tests; the total recovery rate was increased from 86.42% to 90.85%, and the A/S was increased from 10.68 to 15.27 in bench-scale flotation of a bauxite ore. The FTIR spectra and zeta potential analysis shows that BHA can promote the adsorption of NaOL on diaspore, and inhibit the adsorption of NaOL on kaolinite. The mixed NaOL/BHA collector not only has a significant effect on mineral selective adsorption, but also affects the surface activity of gas–liquid interface and flotation foam characteristics, thus affecting the flotation separation of these two minerals. The addition of BHA ensures that NaOL has good foaming properties and at the same time makes the foam less sticky, which can reduce the gangue minerals entrained in the foam product and is beneficial to the subsequent treatment of foam products such as filtration and dehydration.

本文介绍了油酸钠 (NaOL) 和苯异羟肟酸 (BHA) 作为水铝石矿的混合捕收剂。通过浮选试验、FTIR光谱分析、zeta电位分析、表面张力分析和泡沫性能试验研究了混合NaOL/BHA捕收剂对水铝石和高岭石的浮选行为和吸附机理。浮选结果表明，与 NaOL 相比，混合 NaOL/BHA 捕收剂表现出优异的捕收性能和对水铝石对高岭石的选择性。具体来说，微浮选试验中高岭石的回收率降低了20.01%，铝硅比（A/S）提高了9.42；铝土矿小型浮选的总回收率从 86.42% 提高到 90.85%，A/S 从 10.68 提高到 15.27。FTIR光谱和zeta电位分析表明，BHA可以促进NaOL在水铝石上的吸附，抑制NaOL在高岭石上的吸附。NaOL/BHA混合捕收剂不仅对矿物选择性吸附有显着影响，而且影响气液界面的表面活性和浮选泡沫特性，从而影响这两种矿物的浮选分离。BHA的加入保证了NaOL具有良好的发泡性能，同时使泡沫的粘性降低，可以减少泡沫制品中夹带的脉石矿物质，有利于泡沫制品的后续处理如过滤、脱水等。NaOL/BHA混合捕收剂不仅对矿物选择性吸附有显着影响，而且影响气液界面的表面活性和浮选泡沫特性，从而影响这两种矿物的浮选分离。BHA的加入保证了NaOL具有良好的发泡性能，同时使泡沫的粘性降低，可以减少泡沫制品中夹带的脉石矿物质，有利于泡沫制品的后续处理如过滤、脱水等。NaOL/BHA混合捕收剂不仅对矿物选择性吸附有显着影响，而且影响气液界面的表面活性和浮选泡沫特性，从而影响这两种矿物的浮选分离。BHA的加入保证了NaOL具有良好的发泡性能，同时使泡沫的粘性降低，可以减少泡沫制品中夹带的脉石矿物质，有利于泡沫制品的后续处理如过滤、脱水等。