This rotary cooler equipment can quickly cool higher-temperature of granular compound fertilizer directly Approximately to normal atmospheric temperature, which is convenient for timely and quick packing and Prevents compound fertilizer from forming block during store. It can achieve adverse Flow cooling, which can reduce pollution and improve working environment. It has many characteristics such as reasonable structure, stable run, strong adaptability etc.. Features of cooler: 1.High cooling efficiency 2.Simple structure, low rate malfunction, convenient operation, low cost of maintenance, stable operation. 3.Wide usage, can be used for the drying of different materials in powder, granule, strip, lump, large elasticity Of operation. Output is allowed to have larger fluctuations in manufacturing, but not allowed to influence the Quality of the products. 4.Easy to install and remove Application range of cooler: 1. Chemical industry: ammonium sulfate, sodium sulphide, anfu powder, ammonium nitrate, Urea, oxalic acid, bichromate potassium, pvc, nitrophosphate fertilizer, fytic acid, Phosphate compound fertilizer. 2. Food industry: glucose, salt, sugar, vitamin malted milk, granular sugar. 3. Mining products: ceramic sand , coal, coal slime, manganese ore, limestone, pyrite, peat, etc. 4. Others: iron powder, flat soybean