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Click to add WeChatMost of the commonly used beneficiation processes for graphite ore are flotation, gravity separation, acid leaching, etc. However, the specific process needs to determine the ore properties based on the beneficiation test and customize a suitable beneficiation process based on the actual situation. This article will take a graphite mine as an example to introduce its mineral processing process (with a graphite mineral processing process flow chart attached).
The graphite is mainly in the form of flakes or flake aggregates embedded in gangue in minerals. The main minerals of graphite ore are ink, quartz, feldspar and sericite, etc. Its metal minerals are very small in number, including pyrite, pyrrhotite, magnetite, limonite and other minerals.
Since the mine is a single graphite ore, considering that the graphite ore has good natural floatability and the size of the graphite flakes Affects the quality of graphite products, so it is necessary to obtain qualified graphite products while protecting the size of graphite flakes as much as possible. Through mineral processing test analysis, the graphite ore processing process designed by this mineral processing plant is: Crushing and screening-stage grinding-stage mineral processing process.
According to the soft hardness and easily broken nature of graphite ore, in order to protect large-sized graphite flakes, reduce grinding energy consumption, and facilitate production, operation and Management, design the crushing process as a two-stage and one closed-circuit crushing process. The equipment uses Impact Crusher and Cone Crusher, with a designed ore feeding particle size of 1000~0mm and a product particle size of -15mm. This crushing process has low investment, small floor space, simple process and convenient configuration. During the crushing process, the particle size of the ore entering the grinding process can be greatly reduced, grinding energy consumption is reduced, mineral processing costs are reduced, and the economic benefits of the enterprise are improved.
This stage uses one stage of coarse grinding and two stages of Regrinding Process. Among them, the first section of coarse grinding uses a long barrel overflow mill and a spiral classifier to form a closed-circuit grinding, which can avoid damage to large scales and also It can ensure the appropriate grinding fineness, and the coarse grinding fineness is -0.15mm60%. The second-stage grinding adopts a closed-circuit grinding process composed of a wet rod mill and a spiral classifier to prevent graphite flakes that have met the particle size requirements and have been dissociated from monomers from entering the mill again, which can effectively reduce damage to large flakes.
The graphite separation stage is1 rough-7 fine-2 sweep Multi-stage flotation process. The graphite after coarse grinding in the first stage is fed into the stirring tank, and mixed chemicals are added for stirring at the same time, and then fed into the flotation machine for the rough selection stage. The roughly selected foam products are fed into the first stage of fine flotation (adding water Glass), the rougher tailings enter the 1st stage of scavenging operation, and the flotation products enter the 2nd stage of scavenging. The selected products of both stages are sent to the roughing stage for re-selection, and the tailings products are directly piled into the tailings pond. .
After the 1st stage of selection, the foam products enter 2~7 stages of selection operation at a time, including the 2nd and 4th stages of selection. , all have set up a staged regrinding process. The tailings in each stage continue to return to the previous stage of flotation process, and finally graphite concentrate and tailings are obtained. In the end, the graphite ore concentrator obtained a flotation concentrate grade of 95.50% and a recovery rate of 85.00%~87.00%. Not only did the production indicators meet the qualification requirements, but at the same time, the product swath rate was effectively protected.
The above is an introduction to the graphite ore beneficiation process. In the actual mineral processing plant, because the properties of each graphite ore are different, the process flow used is also different. Through test analysis, a suitable process flow can be designed. In addition, a complete set of graphite ore beneficiation equipment can also be customized.
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