Compositions and methods for the separation and recovery of one or more minerals from a mineral ore bulk material are provided. The compositions and methods include selectively depressing minerals utilizing an ammoniated polycarbamide as a separation aid. The ammoniated polycarbamide reduces, or eliminates, the conventional use of depressants such as sodium hydrosulfide (NaSH) in mining flotation processes, including copper-molybdenum (CuMo) separations.

Compositions and methods for the separation and recovery of one or more minerals from a mineral ore bulk material are provided. The compositions and methods include selectively depressing minerals utilizing an ammoniated polycarbamide as a separation aid. The ammoniated polycarbamide reduces, or eliminates, the conventional use of depressants such as sodium hydrosulfide (NaSH) in mining flotation processes, including copper-molybdenum (CuMo) separations.

An ore dressing process for medium-grade and low-grade mixed collophanite includes the following steps: S1; crushing ores to obtain crushed ores; S2: screening the crushed ores to obtain fine-fraction ores and coarse-fraction ores divided into at least two size fractions; S3: performing a photoelectric separation to the coarse-fraction ores of different size fractions to obtain photoelectric separation concentrates and photoelectric separation tailings of each size fraction; S4: combining the photoelectric separation concentrates of the each size fraction to obtain pre-enriched concentrates; S5: combining the fine-fraction ores and the pre-enriched concentrates, and then performing an ore grinding to obtain minerals to be separated; S6: adding water to the minerals to be separated to obtain a floatation pulp, and then performing a floatation to obtain phosphate concentrates and tailings.

An ore dressing process for medium-grade and low-grade mixed collophanite includes the following steps: S1; crushing ores to obtain crushed ores; S2: screening the crushed ores to obtain fine-fraction ores and coarse-fraction ores divided into at least two size fractions; S3: performing a photoelectric separation to the coarse-fraction ores of different size fractions to obtain photoelectric separation concentrates and photoelectric separation tailings of each size fraction; S4: combining the photoelectric separation concentrates of the each size fraction to obtain pre-enriched concentrates; S5: combining the fine-fraction ores and the pre-enriched concentrates, and then performing an ore grinding to obtain minerals to be separated; S6: adding water to the minerals to be separated to obtain a floatation pulp, and then performing a floatation to obtain phosphate concentrates and tailings.