Graphite natural floatability is very good, generally using flotation method, can be harvested with neutral oil. However, the following points should be noted in the flotation: (1) First find out the type of graphite ore. Graphite ore is divided into flaky graphite ore and earthy graphite ore. The characteristics of flaky graphite ore are that the graphite is scaly or leaf-like, and the grade of the ore is not high, generally ranging from 3% to 5%, and the highest is not more than 20% to 25%. This type of graphite floatability good, after flotation, the grade up to 90%, so the ore grade of 2% to 3% can be mined. The flaky graphite has excellent properties and is generally used for the manufacture of high-grade carbon products. Earthy graphite is also known as cryptocrystalline graphite ore. The graphite crystal of this ore is small, generally less than 1 μm, the surface is earthy, lacks luster, and the industrial performance is inferior to scaly graphite. This graphite bit higher mineral ore product, typically 60% to 80%, but the poor floatability  by flotation, there will be significantly improved taste, therefore, less than 65% of the ore grade, is not normally mined The grade is between 65% and 80% , and can be used after sorting. So, graphite ore, ore not just look at their grade level, but should first understand its type, and then decide whether the use of flotation scheme. (2) Pay attention to the protection of large scales during the selection process. Large flake graphite wide use fewer resources, the higher the value, so care must be taken to protect large scale is not broken in production. Usually large scales refer to scaly graphite of +50 mesh, +80 mesh, +100 mesh. Measures to protect large flake is in the sorting process used repeatedly many times choose another grinding process. The graphite dissociated from the monomer obtained by each grinding is selected in time. If the ore is ground to a very fine particle size, the large scales are destroyed. For example, China's large graphite mine Nanshu graphite mine, which uses a rough selection, a sweeping, four grinding , six selected processes, not only protects the large scales from damage, but also makes the concentrate grade 90%. . (3) High requirements on product quality. Graphite products of high quality requirements, such as ordinary graphite flake required grade of 89% or more, graphite pencil grade requirements from 89% to 98%. Some electric carbon graphite requires a grade of 99%. In order to obtain high-grade concentrate of graphite, graphite flotation, featured several times more than normal. Casting Molding Machine,Sand Casting Molding Machine,Sand Molding Machine,Automatic Station Molding Equipment Changzhou Qiaojie Casting Equipment Co., Ltd. , https://www.jsqiaojie.com