50000-500000ty Rotary Drum Granulate Process&Complete Set Equipments
■ Process characteristics
◎ The quality indicators of the products produced and processed by this process meet the requirements of GB15063-2009 national standard for inorganic compound fertilizer.
◎ The comprehensive emission index of air pollutants of the process production system conforms to GB16297-1996.
◎ Comprehensive sewage discharge index conforms to GB8978-1996.
◎ The high allowable concentration of atmospheric pollutants to protect crops conforms to GB9137-88.
■ Process description
◎ The inorganic raw materials such as powder N, P, K, fillers (mainly binder) are measured and enter the mixing process, and the evenly mixed material is transported to the granulator.
◎ Although the material after granulation has formed particles, but at this time the particle moisture is high, can not meet the requirements of packaging and transportation, the material is transported to the rotary dryer for drying.
◎ The material temperature of the dryer is high, and the cooling treatment is carried out by the rotary cooling machine to further improve the particle strength and reduce the moisture. After the coarse screening and fine screening, the large particles and fine powder are screened to obtain the finished product. After the large particle return is crushed by the return crusher, it is returned to the granulator together with the fine powder under the fine screen to participate in the granulation process again.
◎ After heating and melting the anti-caking agent according to a certain ratio, quantitative pressure is applied by the metering pump, and the particle surface is sprayed by the nozzle to form a film to prevent the fertilizer from contacting the air to prevent caking.
◎ The coated granular material is transported to the automatic quantitative packaging scale for packaging and storage.
