Mineral sizers is a device that crushes materials by using the squeezing and grinding shear force generated by two sets of separately driven rolls, which can be used for fine crushing of ores, rocks and refractory materials with high or medium hardness in industrial sectors such as mineral processing, chemical industry, cement, refractory materials, abrasives and construction materials. In the working process of mineral sizers, the roller teeth are a key wearable part, which often appear wear.
2）Increase the hardness of the roller teeth To increase the hardness of the roller teeth, overlay welding is carried out on the surface of the roller teeth to make the hardness of the tooth surface reach above HRC58.

2）Roller tooth surface overlay welding Because the material of the roller tooth is high manganese steel alloy steel, the welding performance is relatively poor. The technical content of the welding rod material selection and overlay welding construction requirements is high. After choosing the suitable wear-resistant welding rod, overlay welding is carried out directly on the surface of the roller teeth. 5mm transition layer and 15mm wear-resistant layer of overlay welding are used for high teeth, and 2mm~5mm repair is carried out for low teeth.
3）Reasonable distribution of high and low teeth due to the abnormal wear of the roller teeth, all the teeth are worn into the same height, it is impossible to distinguish the specific position of the original high teeth and low teeth. According to the number and arrangement principle of high and low teeth, we can make a distribution plan and mark the place of high teeth, so that we can construct accurately in welding.
4）The mineral sizers overlay welding method first remove the tooth plate from the crusher rotor and put it down flat. Will need to overlay welding of all parts of the polishing machine with polishing now metal color. Use DC welding machine, welding line reverse connection, overlay welding with a single break welding process welding, wear-resistant layer current control in 150 ~ 180A, the transition layer current control in 90 ~ 110A. Control the temperature of the welding layer in 100 degrees Celsius below, layered overlay welding to the required thickness, single layer thickness control in 1.5mm ~ 2.0mm.

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