Some important parameters in dry rolling granulation

The dimensions and operating conditions of the extrusion surface are determined by various parameters, which include the following three parts:

1. The nature of the material itself, such as: brittleness, hardness, wear resistance coefficient, density

Take urea and superphosphate, for example, both tend to soften when pressed. In the case of a lower mixing content, it can act as a binder. However, when the content exceeds a certain amount, the plate will become soft. Only after a long period of aging can the raw material become brittle and easy to granulate.

The hardness of the raw material determines the force and energy consumption required in the extrusion.

Wear resistance coefficient is the main factor to make the roll surface wear, the original is very resistant to wear, the roll will use special steel.

The actual density of the raw material determines the apparent density of the plate and the production capacity of the machine.

2. The environmental characteristics of the material, such as: bulk density, humidity, temperature, particle shape, particle size range, material flow properties

The size of raw material powder should be suitable for granulation. It is recommended to 200 it.

Humidity is generally not more than 2%, the material is not the same, to adapt to the humidity is not the same.

3. The characteristics of the equipment, such as: extrusion force, roller shaft speed

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