A common problem recently encountered with the increase in the rate of input feed at Enrichment Plant 2 of the Sarcheshmeh Copper Complex is the loss of value to the tails, translating to lower recoveries. The feasibility of the direct transfer of part of the high-grade concentrate from rougher stages to an appropriate position along the circuit was studied, and two positions were proposed for direct transfer of the concentrate. One position was the feed flow into cleaner cells, and the other was the feed flow into the recleaner cell. The results indicated that transferring the concentrate from the first unit of the rougher stage to the feed flow into the cleaner cells was feasible, with no limitations, while the second position required the installation of a set of hydrocyclones. It was found that the transfer of concentrate to the proposed positions not only addressed the problem of limited cell capacity, resulting in debottlenecking of the circuit, but also improved metallurgical separation efficiency up to 1.4%.

中文翻译：

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Sarcheshmeh 铜厂2 号浓缩厂浮选回路改造改进可行性研究

最近在 Sarcheshmeh Copper Complex 的浓缩厂 2 提高输入进料率时遇到的一个常见问题是尾矿价值损失，转化为较低的回收率。研究了将部分高品位精矿从粗矿阶段直接输送到回路中适当位置的可行性，并提出了两个位置直接输送精矿。一个位置是进入清洁单元的进料流，另一个位置是进入再清洁单元的进料流。结果表明，将精矿从较粗阶段的第一个单元转移到进料流进入清洁单元是可行的，没有限制，而第二个位置需要安装一组水力旋流器。