Ultrafine talcum powder production process

Ultrafine talcum powder production process

Superfine talcum powder is mainly used in PU bright primer and PU solid color finish in solvent wood coating. The use of industrial coatings is appropriate, and is primarily used to reduce costs and advance the filling function of the primer. In the water-based latex coating, it can impart good paintability, leveling, gloss retention and flexibility to the coating, and at the same time effectively advance the corrosion resistance and dryness of the coating.

What kind of process is produced by such a “greatly” superfine talcum powder?

Talc beneficiation can be divided into flotation, hand selection, magnetic separation, and photoelectric selection. Nowadays, due to some shortcomings in flotation skills, the whole industry basically does not use flotation beneficiation; the hand selection is based on the different grindiness of talc and gangue minerals, and the choice of workers to choose the experience of hand-mixing is more commonly used now. Method. The method of sorting using the different properties of the surface optical industry of talc and impurity deposits is called photoelectric detection, and this method is now more and more valued and applied by enterprises.

After the classification of the ore into the warehouse, the batch enters the workshop for crushing and coarse grinding before ultra-fine grinding: the first is to perform hammer crushing, then vertical grinding, iron removal, and into the bag.

With the advancement of technology and the continuous advancement of the use of shopping malls, fine grinding and ultra-fine grinding talc has become a wind vane to measure the quality of talc powder products. Talc has a Mohs hardness of 1, which is naturally breakable and grindable. Ultra-fine grinding of talc, now the domestic and international shopping malls basically choose two methods: one is the air flow damage grinding, but the vertical grinding plus grading screening grinding; of course, there are other processing methods such as water mill, ring barrel grinding, etc., but It is not a mainstream method. Firstly, the airflow destroys the grinding process: coarse powder – air flow destruction – iron removal – product powder. The fine powder of this method can reach 1250-5000 mesh (D97=30-5um). Followed by the vertical grinding and grading production process: vertical grinding fine powder – grading equipment screening – 1 to 2 screening – iron removal – product powder, this method of grinding fine powder after all products fineness can reach 1250-2500 mesh (D97=30-8um).

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