Ultrafine milling equipment in the application of rare earths
Monazite concentrate grinding to a certain size the size requirements for solid-liquid heterogeneous reaction, usually the smaller solid particles, particles larger than the surface area, liquid-solid two-phase contact with the more fully, the reaction speed is also faster if the particles too; less, two-phase contact area is small, not only affects the reaction rate, but due to the particle surface layer of insoluble hydroxide film, mineral particles more difficult to access with NaOH, resulting in lower decomposition rate by solid-liquid two-phase reaction dynamic equations can be seen, the reaction speed and concentrate particles is inversely proportional to the square of the radius, so concentrate particle size, a great influence on the reaction rate. through, over industrial practice, usually finely ground concentrate to 325 the following (a 0.044mm 95%:).
Crushed monazite concentrate, can be used to raymond mill, ball mill, vibration mill, tower mill and mix mill turned out alone; Raymond Stone to use more machines, through the technological transformation in recent years, are gradually being established spiral mixing mill and other equipment instead.
Prior to 1999, has used two sets of finely ground monazite raymond machine, the entire plant dust flying, and energy consumption, harsh operating environment of workers, and about 5% of finely ground product loss, through technological innovation, the use of 2 JM-600-type legislation: spiral mixing mill wet grinding, not only production: grain size to meet the requirements, no dust flying, low noise, and no material loss is shown in Figure 12-3l vertical screw mixing mill finely ground monazite process.