Molybdenum ore dressing technical information

Molybdenum Ore (processing of molybdenum ores)

The process of separating and enriching molybdenum minerals from molybdenum-containing ores. Mineral products molybdenum concentrate for smelting molybdenum alloy steel, molybdenum, molybdenum based alloys and chemical products.

Mineral resources of nature and molybdenum minerals are more than 30 kinds of industrial interest molybdenum minerals are molybdenite, molybdenum, tungsten, followed by calcium ore, lead ore color molybdenum, iron, molybdenum, China, etc. (see table). The molybdenum ore industry type has a single molybdenum ore, copper molybdenum ore, tungsten molybdenum ore, uranium molybdenum ore, and molybdenum-containing polymetallic ore. China's molybdenum resources are abundant and its reserves are among the highest in the world. The distribution of molybdenum mines is very wide, mostly concentrated in Shaanxi, Henan, Jilin and Liaoning provinces. The main molybdenum mines include Shaanxi Jinduicheng molybdenum mine, Liaoning Yangjiazhangzi molybdenum mine and Henan Luanchuan molybdenum mine. The characteristics of China's molybdenum mines are low grade, symbiotic mines and large reserves, mainly for underground mining. In addition, the world's molybdenum mines are mainly concentrated in the Cordillera Mountains in North and South America. Important molybdenum-producing countries include the United States, Canada, Chile, Peru, Mexico, Russia, and Armenia.

The process according to the molybdenum mineral hardness is small, the inlay size is fine, but the floatability is good. The molybdenum ore beneficiation mostly adopts the stage flotation and the selected process flow. The beneficiation process of molybdenum ore is divided into two types: single molybdenum ore beneficiation and molybdenum-containing polymetallic symbiotic ore beneficiation.

The single molybdenum ore beneficiation adopts a closed-circuit grinding rough selection, and the coarsely selected tailings are discharged through 2 to 3 sweeps to discharge the final tailings. After coarse grinding of the concentrate, the molybdenum concentrate is selected (4-12 times).

The molybdenum-containing polymetallic symbiotic ore beneficiation adopts different beneficiation processes according to the optional differences of associated minerals. Copper-molybdenum symbiotic ore mostly adopts copper-molybdenum mixed flotation, discards a large number of tailings, and the process of copper and molybdenum separation after mixing the concentrate and re-grinding; molybdenum-tungsten symbiotic ore, associated scheelite ore is preferential flotation, associated with wolframite The combined process of flotation re-election; the molybdenum-uranium symbiotic ore generally adopts a flotation-water-smelting combined process. Flotation is an effective method for recovering molybdenite and separating molybdenum minerals and associated metal minerals. Flotation the hydrocarbon oil (coal oil, transformer oil) as collector, pine oil, xylenol, higher fatty alcohols used as blowing agent. Inhibitors associated with sulfide ore are sodium cyanide, sodium sulfide, and Nokes. When the ore contains Mo 0.09% to 0.3%, the selected molybdenum concentrate molybdenum grade is 47% to 55%, and the recovery rate is 80% to 90%. The third ore dressing plant of the typical mineral processing plant Jinduicheng Molybdenum Company is located in Hua County, Shaanxi Province, China. It was put into operation in 1984 and its production scale is 15,000 t/d. It is the largest molybdenum ore selection plant in China. The main metal ores molybdenite minerals, followed by magnetite, chalcopyrite and galena, sphalerite, cassiterite bismuthinite and the like. Gangue minerals are quartz, feldspar, followed by fluorite, white mica, black mica, silk marble, calcite. The ore dressing process consists of three parts: crushing, rough selection and selection; broken into three sections and one closed road; rough selection is one rough selection, second selection, and second sweeping; selected as a section of re-grinding, nine selections . The original ore molybdenum grade is 0.118%, the concentrate molybdenum grade is 46.87%, and the recovery rate is 80.66%.

The Xiaosigou copper-molybdenum ore dressing plant is located in Pingquan County, Hebei Province, China. It was completed in 1971 and has been expanded and rebuilt several times. In 1991, the production scale reached 3000t/d. The Xiaosigou ore is a vein-infiltrated porphyry copper-molybdenum ore. The main gold 244 minerals are molybdenite, pyrite, chalcopyrite, followed by sphalerite, chalcopyrite, porphyrite and galena. The gangue minerals are mainly quartz and feldspar, followed by sericite, muscovite and chlorite. The beneficiation process consists of three sections and one closed road crushing ore, copper-molybdenum mixed flotation, and copper-molybdenum separation flotation process. The products are molybdenum concentrate and copper concentrate. In 1987, the index included Mo 0.064% of raw ore, containing CuO.129%; bismuth concentrate containing Mo46.67%, recovery rate of 74.96%; copper concentrate containing Cul6.15%, recovery rate of 50.91%.

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