Copper ore stage grinding and selection is a flotation process that adopts a multi-stage grinding and flotation process based on the uneven distribution of ore. This method improves the recovery rate of useful minerals and concentrate grade by re grinding and re selecting the flotation products. The common stage grinding and flotation processes mainly include concentrate regrinding process, intermediate ore regrinding process, and tailings regrinding process.

Copper ore stage grinding and selection process

1.Concentrate regrinding process:For concentrates with finer embedded particle size or higher useful mineral content, re grinding and re selection can further improve the concentrate grade and recovery rate.

2.Intermediate ore re grinding process：For medium ores with coarse embedded particle size or low useful mineral content, re grinding and re selection can improve the recovery rate of useful minerals and concentrate grade.

3.Tailings regrinding process：For tailings with coarse embedded particle size or low useful mineral content, re grinding and re selection can improve the recovery rate of useful minerals and concentrate grade.

The advantages of stage grinding and selection process

It can prevent useful minerals and gangue minerals in the ore from being crushed or slimed, which is beneficial for protecting useful minerals and improving flotation efficiency.

Tailings can be discharged as early as possible in a coarser and finer condition, reducing grinding energy consumption and equipment wear, and lowering production costs.

Copper ore stage grinding and selection is an effective flotation process that can adopt a multi-stage grinding and flotation process based on the uneven distribution of ore. Through methods such as concentrate regrinding, intermediate ore regrinding, and tailings regrinding, the recovery rate of useful minerals and concentrate grade can be improved. This method is beneficial for protecting useful minerals, reducing production costs, and improving the economic benefits of mines.

Typical beneficiation plant

Gansu Baiyin Copper Mine Dressing Plant: The ore composition is complex, with both block and disseminated ores, primary and secondary ores, sulfide and oxide ores; The particle size of copper ore embedded in the primary ore is uneven, and the ore structure is complex. The stage grinding and selection process is adopted. Firstly, some copper minerals with similar floatability and some copper zinc ligands in the lump ore are floated out at a coarse particle size. Then, the mixed concentrate is re ground and re selected to obtain copper concentrate and zinc concentrate, respectively. The specific process is as follows: