• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Use of flocculant-assisted hydrocyclone for mine backfill preparation from mill tailings.
【24h】

Use of flocculant-assisted hydrocyclone for mine backfill preparation from mill tailings.

机译：使用絮凝剂辅助的水力旋流器从磨矿尾矿制备矿山回填土。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Potential benefits of flocculant usage were investigated in hydrocyclones for mine backfill preparation from A-Ltd.'s copper-nickel mill tailings. The study was prompted by the need to reduce or eliminate the backfill deficit experienced at A-Ltd.'s Mine-X.; The tailings feed to the Mine-X Sand Plant which prepares the backfill does not remain uniform, and when its pulp density drops below 15%, solid recovery to hydrocyclone underflow falls short of meeting the backfill requirements of the mine. By adding flocculant to the tailings feed prior to the hydrocyclones, some of the fines in hydrocyclone overflow could also be captured and used for backfill as a way of compensating for recovery loss due to low tailing pulp density.; Through a series of cylinder settling and hydrocyclone tests, a variety of flocculants were examined in terms of their effectiveness for this application, and "Core Shell(TM) 71302" from Nalco was found to yield the best results. With this flocculant, it was possible to achieve solid recovery increases of up to 11% depending on the flocculant dosage employed. However, it was also noted that over-dosage of flocculant could have an adverse effect.; Addition of fines to the hydrocyclone underflow product modifies the particle size distribution of the backfill material, but some increase in the fines fraction is considered to be advantageous.; Apart from improving the solid recovery and size distribution, a further benefit was observed with the use of flocculant. Uniaxial compressive strength (UCS) tests showed that flocculant can also significantly enhance the backfill strength. For example, a backfill prepared using a flocculant dosage of 50 g/t, a cement ratio of 30:1 and a curing time of 28 days had an 85% higher UCS value compared to that obtained without flocculant. This implies that savings could be made in cement consumption and that could further contribute to the economic viability of flocculant use for backfill preparation.
机译：在A-Ltd。的铜镍厂尾矿中，在水力旋流器中研究了使用絮凝剂的潜在益处，该水力旋流器用于矿井回填。该研究是由于需要减少或消除A-Ltd。的Mine-X的回填量不足而引起的。向准备回填的Mine-X砂厂输送的尾矿不能保持均匀，当其纸浆密度降至15％以下时，回收到水力旋流器底流的固体量不足以满足矿山的回填要求。通过在水力旋流器之前向尾矿进料中添加絮凝剂，旋流器溢流中的一些细粉也可以被捕集并用于回填，以补偿由于尾矿浆密度低而造成的回收损失。通过一系列的气瓶沉降和水力旋流器测试，检查了各种絮凝剂对本应用的有效性，发现纳尔科公司的“ Core ShellTM 71302”产生了最佳结果。使用该絮凝剂，根据所使用的絮凝剂用量，可以使固体回收率提高多达11％。但是，也有人指出，过量使用絮凝剂可能会产生不利影响。将细粉添加到水力旋流器底流产物中可改变回填材料的粒度分布，但是细粉含量的一些增加被认为是有利的。除了改善固体回收率和尺寸分布外，使用絮凝剂还观察到了进一步的好处。单轴抗压强度（UCS）测试表明，絮凝剂还可以显着提高回填强度。例如，与没有絮凝剂的情况相比，使用50 g / t絮凝剂，水泥比例为30：1和固化时间为28天制得的回填具有更高的UCS值85％。这意味着可以节省水泥消耗量，并且可以进一步提高絮凝剂用于回填制备的经济可行性。

著录项

  • 作者

    Ni, Wenchang.;

  • 作者单位

    Laurentian University (Canada).;

  • 授予单位 Laurentian University (Canada).;
  • 学科 Engineering Mining.
  • 学位 M.A.Sc.
  • 年度 2007
  • 页码 138 p.
  • 总页数 138
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 矿业工程;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号