Ultrafine grinding technology development background
Such as ball mill, the hanging roller mill (also known as ring rolling grinder or put a wheel grinding machine, commonly known as Raymond), high-speed hammer mill, centrifugal mill, a variety of universal mill, vibration mill mechanical crushing device, in some cases, the lower hardness of brittle materials, but also can play a role of some degree of ultra-fine powder; or, for some materials in the form of aggregates or condensates can play some degree of ultrafine grinding. However, these mills on the product fineness, or on the product particle size distribution, or the purity of the product is difficult to achieve the above requirements. Type of grinding equipment is basically used for micro-crush Thus, the ultrafine grinding is the main purpose of the air jet mill technology came into being.
Impact crusher composition structure and optimization, production methods
By inlet 7 down to the broken body of material. In order to prevent broken blocks of material from inlet to fly out, with a row of chain at the inlet. Into blocks of material falls to the grid on the screen. Small pieces via sieve straight exhaust port, large chunks of material along a fell on the rotor. Rotor plate hammer is equipped with a raised above a certain height. Row of flat hammer according to the size of a rotor diameter of 4~6. After coupling and shaft-driven rotor rotor motor rotation. Board blocks in high-speed rotating hammer and broken back and forth between counterattack plate collisions, the grid screen, rotor, the first counterattack plate and the composition of the feed chain formed a strong impact in the space area, material breaking back to counterattack after counterattack plate and rotor and l the second impact further in the region was composed of impact crushing. After broken material below the rotor discharge port.
Since the mill working principle and structure
Mill is a very large cylinder diameter, slow rotation of the grinding machine, its barrel length can be long or short; materials through to the end of the hollow axle into the machine, in simple body, movement of material and material movement in the ball mill and Rod mill are similar. Under the interaction between material, fineness of grinding to certain materials through the end of the hollow shaft neck rows away, residual barrel and larger-grained materials, as well as of some new material in the coarse fraction, on relatively small items continue to grind, so keep cycling.
The first grinding stage of the mining process
The main advantage of a period of grinding process is: a small number of the grading machine, lower investment; easy adjustment is simple; transport of intermediates between the segments, and series of grinding machine can be placed at the same level , thus the configuration of the device is relatively simple; stage grinding machine or grading machine downtime will not affect the work of another grinding section, and thus to lay-off loss; each series can be installed on larger equipment. By stage grinding process, the mill open easily crush phenomenon. Typically, mill and grading agencies into a closed loop. Commonly used process has the following three types: Figure 3-16.
Silicon carbide mill performance characteristics and working principle
Silicon carbide mill production process
Material moisture content on the impact of screening efficiency
The moisture content of materials, also known as the humidity or moisture. External moisture attached to the surface of the material particles have a significant impact on materials screening; moisture in the material cracks and moisture, combined with the material no effect on the screening process.
The basic structure and working principle of the squirrel-cage crusher
Traditional squirrel cage crusher from the base, the size of the squirrel cage wheel up and down the hood, pulleys and motor parts. The size of the squirrel cage wheel from the inside perimeter and twice hit stick. The hit stick riveted squirrel cage formed in the ring plate. Flange on the squirrel-cage key and squirrel axle assembly composed of two sets of empty sets with cage wheel. Have the squirrel cage axle mounted on an adapter sleeve Double row spherical roller bearings (self-aligning type), bearing through the bearing fixed in the seat, the other end of the shaft is equipped with pulleys, by Triangle tape and motor connection. Squirrel cage wheel at the top and sidewalls fitted with scraper cleaning machine in operation cast positive material. Squirrel cage wheel mounted on the hood, the hood is fixed to the base unit. Hood equipped with a chamber board at the top can be replaced after wear. Hood open valve, used to clean up the plot material glued to the machine housing. Valve is locked when the machine is running. Feed inlet on the side of the hood, the discharge port built-in adjustable feed position adjusting plate (cutting tongue). Discharge port open off the entrance and exit, the output of the crushed material from the transport machinery.
Development direction of cone crusher
(1) hydraulic system, hydraulic protection and hydraulic regulating discharge opening;
Improvement of cone crusher
Cone Crusher has over 20 years of production in our country's history. In order to improve the productive capacity and operation of medium and fine crushing cone Crusher reliability in recent years, according to production practices of its argument, structures had a greater improvement. Eliminates low spring pressure of the old series, was badly damaged and a series of mechanical problems. Crusher is more complete, and production capacity increased 20-30% of the Crusher.