BB fertilizer raw materials often contain saline fertilizers such as potassium chloride and ammonium chloride, which are highly susceptible to moisture absorption and corrosion of fertilizer production machine. Therefore, delaying rust and aging of the BB fertilizer produciton line requires measures focusing on four aspects: material selection, daily cleaning, environmental control, and maintenance. Prioritize the use of 304 stainless steel for material contact surfaces. Replace carbon steel components on the inner walls of the silos, mixer blades, and discharge chutes. Apply corrosion-resistant and anti-corrosion paint to exposed carbon steel frames to reduce the rate of salt corrosion at the source.

Persist in cleaning the silos and machines every shift. Empty the silos of residual material after production ends. Residual saline fertilizer, when exposed to moisture, will form scale that continues to corrode the silo walls and seals. Before switching to different formulas, clean the remaining material inside the mixer to prevent salt accumulation. Wipe away any powder adhering to belts and flexible discharge connections promptly to prevent fertilizer buildup from corroding rubber and metal bases.

Strictly control the humidity in the workshop environment. Ensure the raw material warehouse is protected from rain and moisture. Dry any damp, clump-forming raw materials before feeding them into the workshop to reduce the dispersion of high-humidity dust. Install exhaust systems in the workshop to reduce the concentration of salt spray and moisture in the air, minimizing corrosion of steel structures and electrical control boxes. Use corrosion-resistant grease for all transmission bearings and add grease regularly to prevent dust and moisture intrusion.

Regularly inspect, remove rust, and touch up paint. Promptly grind and remove rust spots and repaint exposed steel frames. Replace belts, sealing rings, and other rubber and plastic parts as needed to prevent damage, leakage, and further corrosion. Calibrate the batching scale monthly and promptly repair leaks in silos and chutes to prevent fertilizer leakage and prolonged immersion of equipment. Systematic management can effectively extend equipment life by two to three years and reduce replacement costs.