Comparing with the domical traditional slurry-spraying granulation processes,this paper discussed the processes advantage and application prospect of ammoniation-granulation processes in pipe reactor in the production of S-based compound fertilizer.

Technological features of urea melt spheroidizing(spraying granulation) process for production of high N compound fertilizer;

Troubles encountered in operation of 100 kt/a compound fertilizer plant by urea melt spraying granulation process and method for shooting;

Consideration of some problems present in 50 kt/a urea melt spraying granulation plant;

Based on the existing granule-method compound and mixed fertilizer production,more varieties of compound and mixed fertilizers can be produced using the urea melting and spray granulation process.

This article introduces the energy-saving and consumption-reducing measures for fused salt granulation process, spray granulation process and urea solution production process in urea-base compound fertilizer production.

The manufacture of high N & K by melted urea spray granulation are presented in process,equipment and specification,especially against 2 specialty fertilizers(vegetable 20-7-18 and fruit trees 18-7-20),and the possible problems as well as their counter measures are summarized such as nutrient fluctuation,low granulation rate,powder material into products,scaling of product.

This article introduce the urea solution spray granulating process to produce compound fertilizer.

Discussion on some design problems of tower for melting spraying granulation;