Horizontal fertilizer mixers have a specific, defined operating range regarding the moisture content of raw materials. By properly controlling moisture levels, issues such as material sticking to the walls, clumping, clogging, and discharge difficulties can be avoided, thereby ensuring mixing uniformity and the stable operation of the fertilizer produciton machine.

For raw materials used in organic fertilizers and bio-organic fertilizers, the horizontal mixer is designed to accommodate a moisture content range of 30% to 45%. At this humidity level, the materials remain loose and non-cohesive, allowing for smooth turnover during ribbon-style mixing. This ensures the thorough blending of materials—such as manure, crop stalks, and microbial agents—without causing them to adhere to the mixer walls or blades, thereby reducing the frequency of cleaning required.

When processing dry materials—such as those used in compound fertilizers and blended fertilizers—the raw material moisture content should be controlled within the range of 8% to 15%. In this state, the materials are dry, loose, and possess good flowability, facilitating rapid mixing speeds. This effectively prevents the agglomeration of powdery materials, ensures a uniform nutrient distribution ratio, and prevents equipment corrosion or material spoilage that can result from prolonged exposure to high humidity.

Conversely, if the material moisture content is excessively high—exceeding 50%—it becomes highly prone to caking and adhering to the mixing shaft. This increases the equipment load, potentially triggering malfunctions such as motor overload and significant material residue remaining after discharge. Conversely, if the moisture content is too low—meaning the materials are excessively dry—it can easily lead to airborne dust generation, resulting in raw material loss and environmental pollution within the production facility.

In actual production practice, moisture levels can be fine-tuned based on the specific texture of the materials, utilizing auxiliary devices such as water-spraying systems or drying equipment for adjustment. Additionally, regular inspections of the mixing blades for wear and of the sealing structures are recommended. By combining these maintenance practices with proper moisture control, mixing efficiency can be enhanced, the service life of the horizontal mixer can be extended, and the equipment can be optimally adapted for continuous-flow fertilizer processing and production operations.