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This technique is suitable for Nine Mile River HealthCare mine beneficiation of low grade of phosphorus ore, which is carried out on the basis of the results of a small pilot test of the system. Adopting a single reverse flotation, a rough and fine sweeping principle process, the process flow is simple. The continuity test was carried out by using five ore samples and other heavy ore. The main process conditions such as grinding size, chemical system, flotation time and backwater utilization were tested and good technical indicators were obtained: ore The selected grade is low, the P_2O_5 content is 19.01%, the harmful component MgO content is 10.83%; the P_2O_5 content of the ore dressing concentrate is 37.32%, the MgO content is reduced to 1.23%, and the recovery rate is more than 85%. All the test chemicals are industrial grade chemicals; the test water is all backwater and tap water; the test is carried out at a water temperature of 6-8 °C, so the process can be produced in winter. The results of the continuity test show that the beneficiation process is stable, the process is easy to control, the beneficiation index is good, and the technology is mature. Phosphate rock ore dressing agent, phosphate rock flotation agent ZN28:
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