Inorganic salt regulators eliminate the adverse effects of interfering ions on the efficient flotation enrichment of phosphate ores

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-07-03 DOI:10.1016/j.colsurfa.2025.137676

Shengzong Lan , Liuyang Dong , Tianfu Zhang , Dianwen Liu , Zhengchang Shen

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引用次数: 0

Abstract

This study investigates the role of Na₂SO₄ as an inorganic regulator in enhancing the flotation separation efficiency of apatite from dolomite by mitigating the adverse effects of interfering ions. Micro-flotation tests revealed that adding 3 × 10⁻⁴ mol/L Na₂SO₄ significantly increased the recovery of dolomite from 77.52 % to 91.26 %, while reducing the recovery of apatite by 16.31 %. The MgO content in the mixed concentrate rose from 9.69 % to 15.05 %, with its removal rate increasing from 54.76 % to 82.53 %. Importantly, the loss rate of apatite in the mixed concentrate was reduced by 33.37 %. Characterization techniques and solution properties analysis elucidated the mechanism: Na₂SO₄ prevents the formation of precipitates between interfering ions and sodium oleate (NaOL), reducing NaOL adsorption on apatite surfaces while enhancing and evenly distributing NaOL adsorption on dolomite surfaces. molecular dynamics simulations further showed that Ca²⁺ and Mg²⁺ promote NaOL agglomeration, whereas Na₂SO₄ disperses NaOL uniformly in solution. This study provides an innovative for enhancing the anti-interference ion ability of flotation reagents.

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无机盐调节剂消除了干扰离子对磷矿高效浮选富集的不利影响

研究了无机调节剂Na2SO4对磷灰石与白云石浮选分离效果的影响，减轻了干扰离子的不利影响。微浮选试验结果表明，添加3 × 10−4 mol/L Na2SO4后，白云石回收率由77.52 %显著提高至91.26 %，磷灰石回收率降低16.31 %。混合精矿中MgO含量由9.69 %提高到15.05 %，去除率由54.76 %提高到82.53 %。重要的是，混合精矿中磷灰石的损失率降低了33.37 %。表征技术和溶液性质分析阐明了其作用机理：Na2SO4阻止干扰离子与油酸钠（NaOL）之间形成沉淀，减少NaOL在磷灰石表面的吸附，增强NaOL在白云石表面的吸附并使其均匀分布。分子动力学模拟进一步表明，Ca2+和Mg2+促进NaOL团聚，而Na2SO4使NaOL在溶液中均匀分散。本研究为提高浮选药剂的抗离子干扰能力提供了创新思路。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.