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Molybdenum ore beneficiation equipment needs to be determined based on the properties of molybdenum ore, ore type and other conditions. The molybdenum ore beneficiation process must be determined first before the equipment used can be determined. At present, the common types of molybdenum ore include molybdenite, copper-molybdenite, talc-type molybdenum ore, molybdenum oxide ore, and carbon-containing nickel-molybdenum ore. Let’s take a look at what mineral processing equipment is required for different types of molybdenum ore beneficiation processes?
Molybdenite is the main resource for obtaining molybdenum. Due to the particularity of its mineral structure, it is mainly separated by flotation. Generally, a single molybdenum ore plant mostly adopts the process of crushing-coarse grinding and rough separation-regrinding and then separation. In the coarse grinding and rough selection stage, the rough selection is to regrind a large amount of continuous coarse concentrate produced after rough grinding to fully dissociate it, and then carry out multiple selection operations.
Crushing: Generally, a three-stage and one closed-circuit process is adopted, and the final product particle size is 12~15mm. The main equipment is jaw crusher, cone crusher, and circular vibrating screen;
Coarse grinding-regrinding:Generally, rod mills and hydrocyclones are used for coarse grinding, while wet overflow ball mills and spiral classifiers are often used for regrinding;
Flotation: The preferential flotation method is often used to select rough molybdenum concentrate, rough sweep the tailings to recover associated ores (or discard them), and multiple selections are used to obtain molybdenum concentrate. , the flotation equipment is mainly XCF flotation machine and KYF flotation machine.
Copper-molybdenum ore can not only recover molybdenum, but also copper. The mixed flotation method is often used, and it is first roughed to obtain copper-molybdenum coarse material. Concentrate, and then flotation separates copper and molybdenum to obtain each concentrate. There are two methods: first flotation of copper to suppress molybdenum and first flotation of molybdenum to suppress copper. The main flotation equipment is JJF flotation machine, SF flotation machine, chemical stirring tank and flotation chemicals.
Molybdenum suppression by floating copper: It is to recycle molybdenum ore as a by-product, and combine chalcocite with lime The ore is classified during grinding, and flotation is carried out using ethyl xanthate and black powder as collectors. After flotation, the overflow is concentrated and dextrin is added to suppress the molybdenite, and copper is flotted out. The tailings are processed to obtain molybdenum concentrate. .
Floating molybdenum suppresses copper:After roughing to obtain copper-molybdenum coarse concentrate, it is desludged with a hydrocyclone, and the overflow is merged with the copper concentrate, and the underflow molybdenum coarse concentrate The ore is refined several times, and the tailings obtained are returned to the copper-molybdenum mixed ore for further separation. The selected concentrate is filtered, dried, and lightly burned before being slurried, and a foaming agent is used to reverse flotation the talc. The talc (containing some copper ) and copper concentrate are combined into copper concentrate, and the reverse flotation tailings are the final molybdenum concentrate.
Talc-type molybdenum ore contains a certain amount of talc, which is very similar to molybdenum ore in floatability. Usually, coarse grinding-magnetic grinding can be used Separation - magnetic separation tailings desliming - molybdenum rough selection - fine grinding - molybdenum selection process to achieve separation. Its equipment mainly includes grid ball mill (or autogenous grinding machine), wet magnetic separator, thickener, filter press, BF flotation machine, coarse particle flotation machine, etc.
Coarse grinding: Mainly adopts three-stage crushing-closed circuit grinding-grading operation; p>
Magnetic separation:Use high gradient magnetic separator to remove iron impurities;
Desliming: Cyclone graded overflow product Put it into a strong stirring barrel, add methyl isobutyl methanol as a talc-removing collector, and the flotation foam is the removed talc;
Molybdenum roughing:Remove talc Afterwards, the molybdenum coarse-grained slurry in the flotation tank is stirred and roughed for a second time. The obtained roughing foam enters pre-selection, and the roughing underflow enters scavenging. The pre-selection foam is molybdenum coarse concentrate and enters molybdenum beneficiation operation. , the bottom flow of scavenging is rough selection tailings;
Fine grinding: Finely grind the roughly selected molybdenum coarse concentrate until it is finely ground to below 0.038mm, accounting for 75%~ After 95%, it enters the selection operation;
Molybdenum selection:The process of fine rough selection-fine sweeping selection-selection is often used, and the molybdenum fine rough selection foam enters the selection process, and the molybdenum selection The underflow of fine and coarse separation enters the molybdenum fine sweep; finally, the molybdenum concentrate is obtained, and the fine sweep underflow is the fine tailings;
Molybdenum oxide is made of It is derived from the alteration of pyrite and has low floatability. It is a refractory molybdenum mineral. Its mineral composition includes ferromolybdenum, goethite, pyrite, tungsten molybdenite, tungsten molybdenum lead, and colored molybdenum lead. Mine etc.
Iron-containing molybdenum oxide ore: The flotation-magnetic-gravity separation method can be used, using fatty acid and kerosene flotation, high field intensity wet magnetic separation, and jig gravity separation;
Other molybdenum oxide ores: A flotation process of one coarse and two sweeps can be used, using kerosene as the collector and pine alcohol oil as the foaming agent, and then in the ball mill Add an appropriate amount of water glass as a dispersant and induce flotation through sodium sulfide; or you can use the process of one rough selection, three sweeps, three selections, and one fine sweep.
In addition to the common molybdenum ore types mentioned above, there are also some carbon-containing nickel molybdenum ores. This type of molybdenum ore is made of nickel (nickel disulfide, Nickelite, nickelite) is mainly molybdenum and contains vanadium, uranium and a variety of recycled It is a valuable symbiotic mineral of rare and precious metals, among which molybdenum is mainly molybdenum sulfide ore. This type of molybdenum ore cannot obtain high-quality nickel and molybdenum concentrates using conventional flotation methods. It needs to be effectively separated by chemical methods. The commonly used method is the process of crushing-grinding-sodium hypochlorite decomposition-ion exchange-purification-crystallization-drying. .
The above is an introduction to the beneficiation processes and equipment commonly used for various types of nickel minerals. Xinhai Mining has more than 20 years of experience in molybdenum ore beneficiation. If necessary, you can consult for customization.
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