Mineral sizers is a two-roll machine type, the shape of the roll can be divided into coarse fine-toothed rolls, can be adjusted according to the size of the material needs, suitable for brittle and soft materials. Double-toothed rod crusher is suitable for sinter, coal, cement, silicate, glass, ceramics and other industries, suitable for the crushing of brittle materials below medium hardness, mainly used for ore crushing operation. Since mineral sizers roll crusher was put into operation, with the replacement of gear rings, the following problems have appeared: For different batches of gear rings, once the cumulative error of each roll gear ring exceeds the tooth clearance, it can only be determined that the gear ring is unqualified, which puts forward higher requirements for the production accuracy of gear rings; during installation, due to the uneven clearance between the two sides of the gear ring, it is necessary to spend a lot of time cutting gas welding; slight axial movement of the roll system in production leads to equipment failure. Through the analysis, it is believed that the above problems are all caused by the different sides of the fixed shaft end ring of the main and driven roller.
1. Mineral sizers improvement plan: mineral sizers passive roller adjustment, fixed shaft end ring moving position tooth ring meshing clearance, can solve the overall problem. The scheme has the following four beneficial factors: (1) Because the two rollers are used for one standby, the spare rolling system is changed first, and the replacement roll system is changed after installation, so as to complete the improvement in normal production. (2) When replacing, remove the accessories on the shaft, cut the lathe to the required size, and then assemble, keep the positioning accuracy accurate, while replacing and maintaining the bearing. (3) The position of the passive roller remains unchanged. (4) Maintain the integrity of the original equipment and ensure the matching accuracy of the parallelism of the two rollers. After the improvement of mineral sizers, the cumulative error of tooth ring installation in the same batch is extended in the same direction, the tooth side clearance is uniform, the meshing is reasonable, and the crushing particle size is uniform.
2. Mineral sizers improvement results: After the improvement, the installation production results are obvious, completely solve the uneven phenomenon of tooth clearance during the installation process, reduce the labor intensity of workers; The production precision of the ring is reduced, the wear resistant material is improved, the production cost is reduced, the service life is increased from the original 3 months to 6 months, and the economic benefits are obvious; Good for the overstocked dental circle. After installation, mineral sizers do not have any downtime caused by tooth meshing. Production is improved and uniform coke particles meet the production needs of blast furnaces in time.
