Closed circuit grinding consisted of ball mill and cyclone is adopted in the first grinding. This ensures the separation efficiency, particle size and part of qualified concentrate, and it also abandons part of low grade tailings which reduce the grinding volume of medium ore and the loss of metal.
Magnetic separation sorts out the coarse concentrate and tailings, and reduces the working of flotation operation.
Strong magnetic process recycles fine iron minerals, which can play a dual role of de-sliming and tailings out creating good conditions for flotation. Reverse flotation process system is simple, which can significantly reduce the flotation reagents into pulp and decrease the adverse effect on the flotation process.
This hematite iron minerals are mainly composed of magnetite, hematite with uneven distribution, and gangue minerals are quartz. After comprehensive analysis of ore properties Xinhai designed the stages grinding, gravity – magnetic – reverse flotation process— about 60% coarse concentrate and tailings obtained by grinding; gravity separation timely selected qualified coarse concentrate and got rid of coarse tailings; fine-grained treated by the strong magnetic – reverse flotation process.
This process has reasonability in economy and advance in technology. The final indexes: feeding grade 23.15%, concentrate grade 65.95%, tailings grade 10.05%; this result wins the praise of clients.
Xinhai sets a sample in mines industry relying on its advanced technology and rich experience, and many mine owners ask for cooperation with Xinhai. Xinhai dedicates to provide the best project for clients and now it has been the star in mine industry
Xinhai has many iron separation process cases! Welcome clients to visit our company, and we will company you to visit the production lines we designed.
A hematite in Philippines, annual output of 700000 tons; Xinhai designed two stages desliming process; riffling treated by one roughing, one cleaning and three scavenging; the middling of first scavenging returned to second desliming process. Comprehensive indexes are 69.7% concentrate grade and 65.4% recovery rate.
A hematite in Jiangxi with extremely fine particles distribution was colloidal hematite, which is very difficult to separate. Xinhai designed magnetic roasting-magnetic separation process. Finally, the concentrate grade reached nearly 62%, the recovery rate was 80%.
A hematite ore dressing plant in America, daily output of about 2100t, gangue minerals are quartz, calcium magnesium minerals, Xinhai adopted one stage crushing, one stage autogenous grinding and two stages pebble grinding, and the final grinding size was -0.025mm accounted for 80%.