We usually applying multi-stage grinding process to protect graphite flake from damaged. Applying multiple grinding and separation to meet the customers requirements. we regularly use the flotation machine to remove the waste,and hydrocyclone can be used at the thickening stage,which keep the grinding density at 40% to 50% for better grinding efficiency. At the multi-flotation stage, No.2 oil, No.4 oil, ether glycol and butyl ether oil are the common foaming agents. As for collectors, mainly use kerosene, diesel oil, heavy oil, fat sulfonic acid ester, acid,etc.
For graphite ore accompanied with heavy minerals, we will adopts the process of mixing gravity separation and flotation. That is, separate the heavy minerals with gravity separation then process the heavy separation tailings with flotation method.
Through the mineral processing test before beneficiation, technical staff make the conclusion that the graphite has great washability, so that the commonly used flotation process of single flotation and multi-stage grinding with multi-stage concentrating is feasible in technology, this process also characterised by simple reagents system, advanced and reliable beneficiation index.The program finally receives 14.2% productively,and its fixed carbon content is 92.30%,the recovery rate reaches 87.91%, which creates huge economical and society profits, and receives high praise from the partners.
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