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Adsorption of bis(2-hydroxy-3-chloropropyl) dodecylamine on quartz surface and its implication on flotation
Results in Physics ( IF 4.4 ) Pub Date : 2018-06-01 , DOI: 10.1016/j.rinp.2018.04.014
Wengang Liu , Wenbao Liu , Shujuan Dai , Benying Wang

Abstract In order to clarify the effect of polar group modification on flotation performance of amine collector, flotation properties of quartz and hematite using bis(2-hydroxy-3-chloropropyl) dodecylamine (N23) as a collector were investigated. And the adsorption mechanism of N23 on quartz surface was established by zeta potential measurements, SEM/EDS measurements, and molecular structure analysis. Single mineral flotation results indicated that N23 showed stronger collecting ability on quartz and hematite than DDA-CH 3 COOH. However, starch could depress the flotation of hematite. Flotation recovery of 98.10% for quartz could be achieved, when N23 concentration was 43.33 mg/L and starch concentration was 16.67 mg/L at natural slurry pH. Separation of artificially mixed minerals of hematite and quartz was achieved effectively using N23 as the collector. The optimized separation result with 66.29% iron grade and 90.06% iron recovery in concentrate was obtained when slurry pH was 7.34 with 43.33 mg/L N23 and 23.33 mg/L starch. The interaction energies of N23 with mineral surface also showed well consistency with flotation results. SEM/EDS analyses and zeta potential measurements revealed that N23 could absorb on quartz surface in the forms of strong electrostatic and hydrogen bonding interaction. Compared with DDA, N23 had a higher HLB value and better water-solubility, which resulted in better dispersion in water and stronger adsorption on mineral surface.

中文翻译:

双(2-羟基-3-氯丙基)十二胺在石英表面的吸附及其对浮选的意义

摘要 为阐明极性基团改性对胺类捕收剂浮选性能的影响,研究了以双(2-羟基-3-氯丙基)十二胺(N23)为捕收剂对石英和赤铁矿的浮选性能。并通过zeta电位测量、SEM/EDS测量和分子结构分析建立了N23在石英表面的吸附机理。单矿物浮选结果表明,N23对石英和赤铁矿的捕收能力强于DDA-CH 3 COOH。然而,淀粉会抑制赤铁矿的浮选。当 N23 浓度为 43.33 mg/L 和淀粉浓度为 16.67 mg/L 在天然浆液 pH 下时,石英的浮选回收率为 98.10%。以N23为捕收剂,有效实现了赤铁矿和石英人工混合矿物的分离。当浆液 pH 值为 7.34、N23 为 43.33 mg/L 和淀粉为 23.33 mg/L 时,得到了优化的分离结果,其中铁品位为 66.29%,精矿中铁回收率为 90.06%。N23与矿物表面的相互作用能也与浮选结果表现出良好的一致性。SEM/EDS 分析和 zeta 电位测量表明,N23 可以以强静电和氢键相互作用的形式吸附在石英表面。与DDA相比,N23具有更高的HLB值和更好的水溶性,在水中的分散性更好,在矿物表面的吸附性更强。当浆液的 pH 值为 7.34,含 43.33 mg/L N23 和 23.33 mg/L 淀粉时,浓缩物中铁的回收率为 06%。N23与矿物表面的相互作用能也与浮选结果表现出良好的一致性。SEM/EDS 分析和 zeta 电位测量表明,N23 可以以强静电和氢键相互作用的形式吸附在石英表面。与DDA相比,N23具有更高的HLB值和更好的水溶性,在水中的分散性更好,在矿物表面的吸附性更强。当浆液的 pH 值为 7.34,含 43.33 mg/L N23 和 23.33 mg/L 淀粉时,浓缩物中铁的回收率为 06%。N23与矿物表面的相互作用能也与浮选结果表现出良好的一致性。SEM/EDS 分析和 zeta 电位测量表明,N23 可以以强静电和氢键相互作用的形式吸附在石英表面。与DDA相比,N23具有更高的HLB值和更好的水溶性,在水中的分散性更好,在矿物表面的吸附性更强。SEM/EDS 分析和 zeta 电位测量表明,N23 可以以强静电和氢键相互作用的形式吸附在石英表面。与DDA相比,N23具有更高的HLB值和更好的水溶性,在水中的分散性更好,在矿物表面的吸附性更强。SEM/EDS 分析和 zeta 电位测量表明,N23 可以以强静电和氢键相互作用的形式吸附在石英表面。与DDA相比,N23具有更高的HLB值和更好的水溶性,在水中的分散性更好,在矿物表面的吸附性更强。
更新日期:2018-06-01
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