刘丽艳,赵聪,李盛楠,汪洋.双絮凝剂对细粒红土镍矿酸浸矿浆沉降性能的影响研究[J].矿冶,2019,28(4):.
双絮凝剂对细粒红土镍矿酸浸矿浆沉降性能的影响研究
Settling Performance Study on Acid Leaching Pulp of Fine Laterite Nickel Ore with Dual-Flocculant
投稿时间:2018-07-23  修订日期:2019-05-31
DOI:
中文关键词:  红土镍矿  酸浸矿浆  沉降  过滤
英文关键词:laterite nickel ore  leaching pulp  settling  filtration
基金项目:
           
作者单位
刘丽艳 天津大学化工学院
赵聪 天津大学化工学院
李盛楠 天津大学化工学院
汪洋 天津大学化工学院
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中文摘要:
      在传统的红土镍矿冶炼过程中,针对低品位红土镍矿,通常采用酸性浸出法进行冶炼。在红土镍矿酸浸矿浆中,由于矿粒粒径过小,存在固液分离时间长、效率低等问题。针对固液分离困难的问题,采用阳离子型聚丙烯酰胺和聚合硫酸铁复合作用对红土镍矿酸浸矿浆进行处理,通过比较不同絮凝剂组合作用下自然沉降时间、真空抽滤时间探究双絮凝剂对酸浸矿浆沉降性能的影响。实验结果表明,絮凝剂组合为2 ? 阳离子性聚丙烯酰胺和5 ?中性聚合硫酸铁对酸浸矿浆沉降性能提升最大,沉降速率提高25.5倍,减小絮凝沉降上清液浊度97.6%,真空抽滤时间缩短83.5%,滤饼含水率降低19.8%,降低了后续工艺处理难度。通过本实验研究,为细粒矿浆沉降、过滤困难的问题提供了一种可行的解决方案,对实际工程应用存在较大的指导意义。
英文摘要:
      Aiming at low grade laterite nickel ore, acid leaching is usually used to smelt minerals. In the acidic leaching pulp of laterite nickel ore, the separation of solid and liquid is difficult due to the small particle size. To solve the problem of long separation time and low efficiency of solid liquid separation of laterite nickel ore after acid leaching, the leaching solution was treated by the combination of cationic polyacrylamide and polymeric ferric sulfate. The sedimentation rate of the leaching solution was increased by 25.5 times, the vacuum pumping time was shortened by 60%, the water content of the filter cake was reduced by 10%, and the difficulty of the subsequent process was reduced. This experiment provides an effective solution for solid-liquid separation of suspension, which has great guiding significance for practical engineering application.
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