As everyone knows, the disc granulator machine is commonly used in the NPK fertilizer production line
and organic fertilizer production line.
When in production, the factors affecting the granulation of the disc fertilizer granulator machine
are mainly the disc diameter, the inclination of the disc, the disc edge height, the rotation speed, the material liquid spraying position, and the position of the scraper plate.
The inclination angle of the disc granulator is determined according to the natural angle of repose of the wetting powder before granulation. For example, the natural angle of repose of potassium chloride is 36 °, the inclination angle of dipotassium phosphate is 31 °, and the angle of repose of heavy calcium is 31 °~ 35 ° and so on. When the angle of inclination is less than the natural angle of repose of the wet powder, the material will stick to the disc and rotate with the disc; as the inclination increases, the rotation speed should increase, otherwise the material will easily accumulate on the lower part of the disc and slide, and no drop and upper and lower Scroll down. However, with the increase of the inclination angle, the rotation speed increases, the material residence time becomes shorter, and the particle size of the overflowing particles becomes smaller, so it should be determined according to specific conditions, generally 40 ° ~ 60 °, which can be adjusted by the granulating machine inclination angle adjustment handwheel .
The ratio of the edge height of the disc granulator to the diameter of the disc is generally 0.12 to 0.17, and its diameter can be calculated from the production intensity obtained by experiments or actual production assessment.
The disc granulator has many advantages: uniform product particles, good automatic classification ability, can control the solution to be sprayed on fine particles, so the granulation efficiency is high, large particles are generated less, and the return ratio is small; all operations Intuitive and easy to control, so that the operating conditions can be found relatively quickly during operation, timely adjustment, and strong adaptability to the flexible change of the formula; the production of various products has greater flexibility, a wide range of granularity control; simple structure, Equipment investment and operating costs are relatively low, and are widely used in medium and small compound fertilizer plants. However, there are also some disadvantages: mainly the collection of dust and smoke is difficult, and the ammoniation cannot be performed efficiently. Dust and exhaust gas are prone to spills, and practical measures must be taken to control it. At the same time, it is limited to granulation using slurry or melt with low viscosity.