The grade of aggregate concentrate should be increased by 24% ~ 25% to 36% ~ 40% after the jigging tailings and washed ores with diameters less than 3mm are ground to less than 1m and separated by high-intensity magnetic separator.

Combination of high intensity Raymond mill aggregate mine adopts high intensity Raymond mill technology, it mainly processes with aggregate carbonate ore with low content of aggregate, low content of phosphorus, and high content of iron.

Ore grinding machine has rod mill and ball mill, all in wet type grinding machines, combines with the SHP-2000 type strong magnetic machine and CHF pneumatic flotation machines. After many years of production test, it turns out that the Raymond mill processing method is suitable for coarse aggregate dressing application.