Horizontal ribbons and vertical discs: How to choose between organic and inorganic compound fertilizers?

The difficulty in mixing organic and inorganic compound fertilizers is "one light and one heavy" - organic materials are fluffy and low density, while inorganic fertilizers are dense and high density. The two are easily stratified, leading to nutrient segregation.

Horizontal ribbon mixer: relies on convection circulation to solve the density difference. The inner and outer layers of the spiral belt rotate in opposite directions. The outer layer pushes the material from both ends to the middle, and the inner layer pushes the middle part to both ends, forming axial convection. Forced circulation allows light organic materials and heavy inorganic salts to repeatedly exchange positions, which is especially effective for formulas with large density differences. The residual amount is small and there is little cross-contamination between batches, so it is suitable for switching between multiple varieties. The shortcoming is that it has poor adaptability to high-humidity and viscous materials.

Vertical disc mixer: forced stirring by the rotating disc at the bottom. The material enters from the top, and the bottom disc rotates at high speed to drive the paddle, throwing the material upward, tumbling and mixing. It has a simple structure and low power consumption. Its tolerance to materials with high moisture content is better than that of the ribbon machine, and it is not easy to stick to the wall. However, the mixing uniformity depends on the residence time of the materials in the tray. For formulas with large density differences, heavy inorganic salts are easy to sink to the bottom and light organic materials are easy to float. The batch stability is not as good as that of the ribbon machine.

The key to selection depends on the formula and moisture content. For formulas with a high proportion of organic matter, many types of inorganic salts, and large density differences, the horizontal ribbon machine is more reliable, but it requires pre-drying treatment. For production lines with a low proportion of organic matter, high moisture content, and a single variety, the vertical disc machine can save investment and be simple to operate, so it can also be used competently.

The fertilizer mixer machine does not directly determine the appearance of the particles, but it determines whether the nutrients in each particle are consistent.