SINO iron mine annual designed processing capacity is 84 million tons, the whole mineral technic is formed by 6 production lines. After put into operation, SINO iron mine will become the world largest magnetite production basement, with annual output 24 million tons of high grade concentrate magnetite. The project started in 2006, put into production by the end of 2012. Since 2013, when NO.1 and NO.2 production line has put into production for 3 years, an international brand hydrocyclone which configured in A section of grinding classification was serious blockage, also with low treatment capacity, totally couldn’t meet the production demand. Haiwang was invited to undertake A section of grinding classification’s technical transformation since April 2015. Our experts team closely cooperated with SINO field experts, combined with the powerful clients database of haiwang, after repeated discussion and demonstration, we decided to use our owned patent new type FX840-P hydrocyclone to replace Gmax33 hydrocyclone. After reformation the hydrocyclone operated stably with excellent index, the production capacity of grinding classification system also has improved. SINO recognized and highly praised our hydrocyclone’s performance and practicality. At the present time, 84 sets of haiwang FX840-P hydrocyclone has been applied in all 6 series of mineral processing of Sino iron mine. 6 lines are all in stable and high efficient operation with the longer service life equipments.