Graphite Processing

Graphite Beneficiation Technology

Every graphite mine has unique characteristics which need to be determined in advance. Therefore, it is of crucial importance to determine graphite flake morphology, primary flake size and liberation size. Typical flake graphite deposits are gneissic and consist mainly of feldspar, quartz and mica. The size of the graphite flake is a very important fact under commercial consideration. Therefore, it is in the best interest of a flake graphite producer to maximize the amount of large flake. Prominer is experienced in choosing the suitable grinding mill to reserve high yield rate of big flake graphite.

Stage Grinding-Flotation Process

It is necessary to undertake the lab test or even pilot test for determining primary flake size and liberation size, improving the TGC grade as high as possible, meanwhile to find the suitable grinding-flotation way to reserve the big flake size graphite. It means that any processing reducing the size of constituent flake must be minimized. The ball mill is used for the primary grinding stage, thereafter the vertical stirred mill with ceramic grinding media is the best choice for intermediate regrinding stages.

Thermal Purification And Chemical Purification

Graphite purification furnace is used for continuous high temperature purification of graphite powder to match increasingly stricter environmental protection requirements. We have continuous type and pusher type for different purpose purification process. It is continuous loading and discharging under high temperature reducing the energy consumption and shortening the production cycle. The furnace adopts electrical resistant or induction heating that the temperature can reach up to more than 2600°C. Most of the impurities become gas, but the graphite will remain because of its heat resisting property. Both high temperature and chemical method can be used to satisfy the high purity requirement. The furnace uses high efficiency filter system, which can trap the dust and corrosive gases coming from the purification process.

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