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Molybdenum Ore Beneficiation Process Flowchart
DETALLES
| Introducción detallada
Process Introduction
The primary beneficiation method for molybdenum ore is flotation, and the recovered molybdenum mineral is molybdenite. Occasionally, to improve the quality of the molybdenum concentrate and remove impurities, the concentrate undergoes further chemical beneficiation treatment.
Molybdenite exhibits good natural floatability. However, its floatability decreases when overground. Although the addition of a certain amount of polar collectors, such as xanthates, can facilitate the recovery of molybdenite under these conditions, the newly formed slime generated by overgrinding adversely affects flotation performance. Therefore, in the beneficiation of molybdenite, it is crucial to avoid and prevent overgrinding. In industrial practice, it is necessary to adopt a staged grinding process combined with multi-stage separation flows, gradually achieving single-mineral liberation and ensuring high recovery rates of molybdenum concentrate.
Process flow
The crushing of molybdenum ore typically employs a three-stage, closed-circuit process, with the final product particle size ranging from 12 to 15 millimeters. Grinding is usually carried out using ball mills or rod mills. Flotation is conducted using preferential flotation. The rougher flotation step yields a molybdenum concentrate, while the tailings from the rougher scavenging stage are either used to recover associated minerals or discarded. The crude molybdenum concentrate undergoes two or three stages of regrinding and four or five stages of cleaning to obtain the final molybdenum concentrate.
To ensure the quality of molybdenum concentrate, it is necessary to further separate heavy metal minerals such as copper, lead, and iron, as well as calcium oxide and carbonaceous minerals, that are present in the molybdenum concentrate.
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