Organic fertilizer disk granulator machines are commonly used granulation equipment, but they have several limitations in actual disc ganulation production lines.

First, they have high requirements for raw materials. The moisture content, fineness, and ratio of the raw materials must be strictly controlled. Excessive moisture easily leads to sticking to the disc, clumping, and agglomeration; insufficient moisture makes it difficult to form pellets. Insufficient material fineness and high impurity content significantly reduce the granulation rate, making it less suitable than extrusion granulation.

Second, granulation is unstable and highly susceptible to human error. Slight changes in disc inclination angle, rotation speed, water spray volume, and feed amount result in uneven particle size, large color differences, and multiple grades in the finished product. Skilled workers are required to make real-time adjustments, resulting in a low degree of automation.

Third, the particles have low strength and are easily broken. Relying on water spray for bonding and forming results in a loose internal structure and poor hardness. During drying, conveying, and packaging, the particles are prone to breakage and powdering, affecting the appearance and storage of the finished product.

Fourth, production capacity is limited, making it unsuitable for large-scale production lines. Under the same floor space, disc granulation has lower capacity than roller granulation, weaker continuous production capability, and is not advantageous for multi-line, large-scale production.

Fifth, there is a greater loss of live bacteria. To ensure molding, the moisture content is often high, and the drying time and heating are long, which can easily cause the death of microorganisms in the bio-organic fertilizer, reducing fertilizer efficiency.

Sixth, there is a lot of dust, high losses, and high energy consumption. The granulation process involves more water spraying, more return material, and a high recycling rate, increasing the drying load and overall energy consumption. At the same time, there is a lot of dust on site, putting significant pressure on environmental protection.

Seventh, appearance is limited and added value is low. Roundness is generally poor, and there are many cracks, making it difficult to produce high-grade, high-quality granules, which is detrimental to branding and export sales.