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| 1 | Assessment of pH-responsive nanoparticles performance on laboratory column flotation cell applying a real ore feed显示文摘Nanoparticles(NPs)can promote the column flotation process in mining industry.Nanoparticles'effects on column flotation process(copper recovery,grade and flotation rate constant)are assessed in Sarcheshmeh Copper Complex,Iran,through response surface methodology(RSM)optimization technique.The c-Al2O3,a-Fe2O3,SiO2,and TiO2 nanoparticles are selected for these experiments.A flotation rate constant is chosen as a response to assess the effect of nanoparticles on flotation in its kinetic sense.The process p H and nanoparticle dosage are selected as the influential parameters.Results obtained from RSM indicated that the maximum percentage of Cu recovery and grade is obtained at p H of 12 and nanoparticle dosage of 6 kg/t,through a-Fe2O3 and c-Al2O3 nanoparticles,respectively.Applying nanoparticles in particular c-Al2O3 and a-Fe2O3 increases the Cu recovery by 8–10%together with the grade by 3–6%in a significant manner.It is revealed that nanoparticles could effectively be applied in enhancing the flotation performance. | Samiramis Nasirimoghaddam Ali Mohebbi Mohsen Karimi M.Reza Yarahmadi | 2020 | International Journal of Mining Science and Technology2020，30，2： | 19 |
| 2 | 基于针铁矿法对石棉尾矿酸浸液高效除铁显示文摘石棉尾矿酸浸分离制备系列高纯硅镁化合物粉体材料是石棉尾矿高值化利用的重要途径,但石棉尾矿的酸浸液中除主要含有Mg^(2+)外,还含有如Fe^(3+)、Fe^(2+)等杂质离子。以石棉尾矿经焙烧、酸浸后的高镁酸性滤液为原料,氨水为中和剂,对滤液进行沉淀除铁,采用分光光度法测定滤液中铁离子的浓度,XRD、FT-IR等分析沉淀产物的物相结构变化。结果表明,在反应终点pH=4.5、反应温度80℃、反应时间10 min条件下,沉淀物主要由针铁矿和黄铵铁矾构成,铁的去除率可达99.71%,镁损失率仅为3.39%,悬浊液的过滤速度为3.46 mL/min,产物过滤性能好,铁离子去除率高。 | 储凌燕 孙红娟 彭同江 | 2022 | 有色金属(冶炼部分)2022，，11： | 0 |
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