Abstract:

In order to rationally develop and utilize a low-grade phosphate rock resource in Yichang，

X-ray preselection test was carried out. The results show that under the condition that the phosphate rock

sample with P2O5 grade of 18.74% is crushed to 40～0 mm，the screening (screen hole width of 10 mm)，40~

10 mm particle size X-ray pre-selection and discarding，pre-selected block concentrate and 10～0 mm par⁃

ticle size fine ore are combined，the comprehensive concentrate with P2O5 grade of 25.45% and P2O5 recov⁃

ery of 91.03% was obtained. The research target requirement of phosphorus product P2O5 grade ≥ 25% and

P2O5 recovery rate ≥ 80% are achieved. The medium-low grade phosphate rock was treated by screening and

X-ray preselection process，which is not only environmentally friendly，efficient，low production cost，high

comprehensive utilization rate of resources，but also stable and reliable of the process. The application of

waste rock in underground filling can effectively solve the problem of goaf collapse and eliminate the poten⁃

tial secondary disasters of industrial solid waste.

Key words:

phosphorites, low grade phosphate rock, massive ore, X-ray preselection