Progress in theory and basic research of molybdenum ore beneficiation

Wang Hui, Central South University, etc., through the calculation of the free energy of a series of interfacial interactions between minerals and water, collectors and water, minerals and bubbles, minerals and collectors in the molybdenum flotation system, The interfacial thermodynamic behaviors such as van der Waals force, hydrophobic gravity and hydration repulsion were studied. The results show that van der Waals gravitation and hydrophobic attraction exist between the surface of each mineral and water. The hydrophobic attraction between molybdenite and water is lower than the hydrophobic attraction between gangue mineral and water. Collector and water molecules The hydrophobic attraction is the main force causing the collector to disperse in the aqueous solution; the strong hydrophobic attraction between the molybdenite and the bubble is the root cause of the natural floatability of the molybdenite; the molybdenite and the capture in the aqueous medium Van der Waals force between the collections is gravitational, but van der Waals force is not the main force between the molybdenite and the collector. The main factor for the capture is the hydrophobicity caused by the interaction of Lewis acid-ba se (AB). gravitational.

Tsang Kam Ming-hui in order to better understand the copper ore, molybdenite and principles and the role of agents, through first-principles theory in quantum chemistry, electronic structure chalcocite and molybdenite were studied using the Materials Studio 5.5 software. The results show that the differences in the electronic structural properties (energy band structure, density of states, Mulliken population, charge density, etc.) of the chalcopyrite and molybdenite directly affect its interaction with the agent. From the frontier orbital energy of minerals and chemicals, the surface energy of minerals, the adsorption energy of minerals and chemicals, the strength of minerals and chemicals was analyzed. The results showed that thioglycolic acid and chalcopyrite had the strongest effect, and it interacted with molybdenite. The weakest, indicating the use of thioglycolic acid as an inhibitor in the separation of copper and molybdenum has good feasibility.

Zhang Lirong conducted a potential-controlled flotation separation study on molybdenum ore, investigated the effect of potential on molybdenite flotation, systematically controlled the flotation of molybdenum ore, and controlled the flotation of molybdenum potential. The mechanism was studied. From the E-pH diagram of Na2S and MoS2 in the water system, it is known that the product on the surface of the material is controlled by the potential at different pH values. The E-pH diagram of Na2S and MoS2 shows that when the pH is about 11 and the potential is between 0.22-0.3 V, the active components of both in the flotation solution are S0. Electrochemical testing, analysis and research of the system were carried out using MoS2 mineral electrodes. Cyclic voltammetry results show that in the presence or absence of the collector system, the surface oxidation products are different at different pH values â€‹â€‹and scanning potentials. At a potential of 0.2 V, the active components of MoS2 are H2MoO42- and S0. S0 is the main active component in each sorting process. The presence of elemental sulfur makes the mineral hydrophobic, which is the main factor for MoS2 to realize potential-controlled flotation.

In order to improve the floatability of the fine-grained refractory molybdenum ore, Laskowsid.JS uses a selective flocculant to agglomerate fine-grained molybdenum ore into a large-grain molybdenite, thereby improving the floatability and recovery of molybdenum ore. It also improves the filtration performance of molybdenum concentrate, reduces the moisture of molybdenum concentrate, and saves drying energy and cost.

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