At present, most of the old crushers used in various industries are backward in structure and crushing mechanism in the 1940s and 1950s, and many manufacturers even borrow the equipment used for crushing ore in mines. The crushing effect of the above two are very poor: (1) the powder rate is high, generally 25 to 30%, and a large part of the useful material becomes useless powder after being crushed; (2) The primary yield is less than 50%, the proportion of super-particle size is large, and it needs to be broken twice; (3) The equipment maintenance fee is high. The result is great economic loss and industrial energy waste. In the ferroalloy system alone, the direct economic loss of using the old crusher is 30 million yuan per year, and other systems are even worse. To change this situation. At present, the model is about to form a product series. And can be designed according to the user's different requirements for particle size and yield.
Structure principle and characteristics
1.1 Brief description of structure and principle, mineral sizers consists of power, crushing and transmission three parts, the transmission system is: a motor coupling, a reducer, a coupling - crusher drive shaft (fixed tooth roller), a gear transmission mechanism, a crusher driven shaft (movable tooth roller). All components are installed on the welded box base, crushing principle. A V-shaped crushing chamber is formed between the two relatively rotating tooth rollers. After the material is added from the top mouth, it goes down with the rotation of the roller. The two rollers can rotate at the same speed or at a different speed. Different grain size can be obtained by adjusting the gap between the two teeth, and the enlarged roll width caused by the wear of the teeth can be compensated.
1.2 Main technical parameters Feed size: 40~80mm Discharge size: 8~25mm powder rate (< 8mm):< 1.3.1 Roll tooth shape and tooth layout after the test optimization, the crusher has a unique crushing effect and good casting performance of the pyramid teeth, the tooth shape Angle is also optimized, with a small crushing force can be broken into 34 small pieces, superior to other tooth shape. At the same time, only one kind of tooth plate can realize the staggered arrangement of the upper teeth of the two rollers, forming a qualified particle size tolerance space, and splitting the material. The old crusher is mostly axial strip teeth, and the two mixed materials for extrusion crushing, crushing particle size can not be guaranteed, a low yield, high powder rate. SGP crusher with a new tooth shape and tooth layout design to eliminate the disadvantages of the above old crusher.
1.3.2 Roll Assembly mineral sizers Each roll consists of eight high chromium cast iron plates fastened to the number of octagonal wheels with T-bolts. When the tooth plate is worn to the point that it can no longer be used, the explosive bolt can be removed and disassembled one by one, and the entire shafting composed of shaft, wheel number, tooth plate, bearing, etc., does not have to be lifted up and down, so the installation is very convenient. At present, the tooth roller of the more advanced international crusher in the United States is assembled by a number of tooth rings along the axis, the roller teeth can be repaired after wear, that is, surfacing a layer of 3~4mm tungsten carbide on the tooth surface, the repair cost is similar to the replacement of high chromium cast iron tooth plate, the wear resistance is also close, but because of the need to lift the entire shafting back and forth, maintenance inspection is inconvenient, and the repair period is long, when the production is tight, Disassembly and replacement of tooth plate is timely and convenient.
1.3.3 Transmission mechanism The transmission mode of the old crusher is mostly two rollers with a pair of non-standard ultra-long teeth gear transmission, when the wheelbase changes, the long teeth can still maintain mesh, so that the two roll teeth have a relatively fixed position relationship, but because the center distance changes, the gear can not ensure normal mesh. The drive is not smooth, noisy, and the gear life is short. mineral sizers consists of four gears supported at one end of the two rolls, and four gears supported at the other end of the gear bracket. The two rolls are interlinked by the four gear brackets. This system ensures that the normal meshing of the transmission gears remains constant when the two rolls are adjusted to air. This eliminates the problems of unstable transmission, loud noise and short gear life caused by the old long-tooth transmission, realizes smooth transmission and improves transmission efficiency.