The scheme of spraying tungsten carbide coating on the surface of the ribbon mixer

       

Ribbon mixer is widely used in chemicals, battery raw materials, coatings, dyes, pesticides, pharmaceuticals, food, feed, additives, refractory materials, new materials, electronic plastics, ceramics, fertilizers, metallurgy, mining, dry mortar, special building materials, etc. Mixing of powder and solid, powder and liquid in various industries.

Figure (1) Ribbon mixer for lithium battery cathode material mixing

Influenced by the mixed materials during the operation of the ribbon mixer, two major problems will inevitably occur:



1: Raw materials are polluted 2: Mixing equipment is eroded by materials In response to this situation, the technicians of Beijing Naimer Technology Co., Ltd. have developed KN1300 ribbon tungsten carbide coating after years of market follow-up investigation and repeated tests Spraying, the specific plan is as follows:



1: Stirring paddles, blades:

The force-bearing surface of the blade is coated with nickel-based tungsten carbide alloy (70% nickel), the thickness is >1 mm, the wear resistance is 5-10 times that of stainless steel, and the temperature resistance is 600 degrees. The other parts of the blade are coated with tungsten carbide. never fall off

2: Tank body, inner wall:

Figure (2) On-site production of ribbon mixer coating to reduce the content of magnetic substances

The part in contact with the material is treated with integral tungsten carbide. The wear resistance of tungsten carbide is second only to diamond, the coating thickness is 0.2-0.35 mm, and the temperature resistance is 400 degrees.

3: The easy-to-wear and vulnerable parts of the equipment:

After spraying the battery material and equipment, the introduction of stainless steel wear impurities is reduced, and the proportion of battery self-discharge is greatly reduced. According to the different working environments of battery equipment, the most suitable coating is selected to minimize the impact of metal impurities on lithium battery materials. pollution.

Figure (3) The ribbon in the ribbon mixer is more worn and needs to be protected by a tungsten carbide coating

The surface of the ribbon is sprayed with KN1300 tungsten carbide coating with a bonding strength of more than 700 kg, which is the super-hard wear-resistant coating second only to diamond. The workpiece temperature during the coating production does not exceed 150 degrees without any deformation of the workpiece, and the coating hardness reaches above HRC70. It is mainly suitable for particle wear conditions. At present, sprayed tungsten carbide coatings have been widely used in the lithium battery industry to prevent metal ions from entering the powder. Wear-resistant and corrosion-resistant coatings can be selected according to different use environments.

KN1300 adopts JP8000 supersonic flame spraying, the impact energy of sprayed particles is large, the powder oxidation burning loss is small, and a coating with high density and excellent comprehensive performance can be obtained. Double the service life.