Graphite Beneficiation Process

Graphite beneficiation process

Graphite flotation is commonly used for purifying graphite minerals. Because the graphite surface is not easily wetted by water, it has good floatability and is easy to separate from impurity minerals.

In China, the flotation method is basically used for graphite ore dressing.
The flotation of graphite ore is generally carried out by positive flotation followed by reverse flotation of the flotation concentrate. A higher grade graphite concentrate can be obtained by flotation. Flotation graphite concentrate grades can usually reach 80%-90%, using multi-stage grinding, the purity can reach 98%.

Flotation reagents for graphite beneficiation process

The commonly used collectors for flotation crystal graphite are kerosene, diesel oil, heavy oil, sulfonate, sulfate, phenol and carboxylate. The common foaming agents are 2# oil, 4# oil, pine oil, alcohol and Butyl oil, etc., the adjusting agent is lime and sodium carbonate, and the inhibitors are water glass and lime.

The commonly used collector for the flotation of cryptocrystalline graphite is coal tar. Commonly used foaming agents are eucalyptus oil and pine oil. The commonly used regulator is sodium carbonate. The commonly used inhibitors are water glass and sodium fluorosilicate. Flotation agent preparation method

Graphite flotation process

The scale graphite flotation process is generally a closed-circuit process of multi-stage grinding, multi-stage sorting, and medium-mine order (or centralized) return.

There are three forms of multi-stage processes, namely re-grinding of concentrates, re-grinding of mines and re-grinding of tailings. Crystalline graphite is mostly used in the re-grinding process of concentrates. Under normal circumstances, the recovery rate of mineral processing operations can reach about 80%. Some mines have also tried the re-grinding process in the mine, but the effect is not obvious.

Some small factories also use open or semi-open flotation processes. Due to excessive disposal of tailings, the ore recovery rate is very low, generally only 40%-50%.