To improve the mixing precision of horizontal fertilizer blenders, optimization in four key areas is crucial: material feeding, structure, operation, and maintenance. This ensures uniform mixing of nitrogen, phosphorus, potassium, trace elements, and organic fertilizer raw materials.

First, standardize the feeding sequence and proportions. Add the largest quantities of main materials first, then the smallest quantities of auxiliary materials, and finally the trace additives to prevent clumping. Control the material moisture content within a reasonable range; excessive dryness leads to stratification, while excessive moisture leads to caking, both reducing uniformity. During batch production, strictly adhere to the formula for weighing, avoiding arbitrary increases or decreases to ensure consistent batch proportions.

Second, optimize the mixing structure and parameters. Use a double-ribbon mixer model, ensuring a reasonable gap between the inner and outer ribbons. The smaller the gap with the cylinder wall, the more thorough the mixing and the less residue. Adjust the speed according to the material characteristics; too low a speed results in uneven mixing, while too high a speed can cause centrifugal stratification. For materials prone to sticking to the walls, a wall scraper can be installed to reduce dead zones.

Finally, control the mixing time. Too short a time results in uneven mixing, while too long a time wastes energy and exacerbates material breakage. Generally, fertilizer mixing should last 5-10 minutes. The optimal time can be determined through sampling and testing to ensure both uniformity and efficiency.

Proper equipment maintenance is also crucial. Regularly inspect the screw conveyor and blades for wear and deformation. Severe wear can lead to weak mixing and missed areas. Replace damaged parts promptly to ensure smooth transmission. Lubricate bearings and reducers regularly to prevent material segregation caused by equipment vibration.

Finally, avoid overloading and foreign objects. Do not exceed the feed capacity to prevent excessive mixing load and impaired rotation. Strictly prohibit the entry of stones, metal, and other hard objects to protect the mixing components and ensure stable equipment operation.

By implementing these measures, the mixing accuracy of the horizontal mixer can be significantly improved, meeting the uniformity requirements of the bio-organic fertilizer produciton lines.