Discussion on the mineral processing technology of molybdenum ore

The molybdenite crystal is a hexagonal layered or plate-like structure formed by the S-Mo-S structure along the interlayer of Fanshijian and the polar covalent bond S-Mo in the layer. The bond between the layers is weak, and the covalent bond bonding within the layer is very strong. Therefore molybdenite easily disintegrate the layer structure between in the form of sheet or plate output, which is the natural floatability Hui copper ore good reason. Practice has proved that under suitable grinding fineness, the dissociation of molybdenum crystal occurs between the S—Mo—S layers, and the hydrophilic S—Mo surface accounts for a small proportion. However, when over-grinding, the proportion of S-Mo surface increases, and the floatability decreases. Although a certain amount of polar collectors such as xanthate are added at this time, it is beneficial to the recovery of molybdenum ore, but the new slime produced by over-grinding Affect the flotation effect. Therefore, the selection of molybdenite should avoid and prevent over-grinding. In the production, it is necessary to adopt segmental grinding and multi-stage sorting process to gradually achieve monomer dissociation and ensure high recovery of molybdenum concentrate.

The crushing of molybdenum ore generally adopts a three-stage and one-closed process, and the final product has a particle size of 12 to 15 mm.

Grinding is usually carried out using a ball mill or a rod mill-ball milling process. Henderson is the only semi-self-grinding process. Flotation uses the preferred flotation method. Rough selection of molybdenum coarse concentrates, coarse sweeping of tailings to recover associated minerals or disposal. The molybdenum coarse concentrate is re-milled in two or three stages, and the final molybdenum concentrate is obtained in four or five times.

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