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Types of molybdenum mineral processing reagents

2023-04-20View Original

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Molybdenum mineral processing generally employs flotation, that is, by adding mineral processing agents to alter the physicochemical properties of the mineral surfaces, adjusting their flottability or increasing the differences in flottability among various minerals in order to achieve mineral separation. In industrial production, the common reagents used in molybdenum mineral processing include collectors, foaming agents, inhibitors, dispersants, etc. The molybdenum collectors chosen are mainly hydrocarbon oils, typically kerosene, diesel, etc ; Foamers are generally 2# oil, fusel oils, or ether alcohols ; Inhibitors are generally sodium thioglycolate, phenoxysulfon, etc ; Dispersants are generally water glass and the like. The collector xanthate is a light yellow powder; its color may be darker due to the presence of impurities, and it is composed of hydrocarbyl dithiocarbonates. In molybdenum production, to prevent the decomposition and loss of xanthate, it is often used in alkaline pulp ; It decomposes easily when exposed to heat, and the higher the temperature, the faster the decomposition occurs ; It is prone to oxidation; if stored for too long, in addition to decomposing and becoming ineffective, it will oxidize into xanthate, which reduces its effectiveness. To prevent decomposition, xanthate must be stored in a sealed container to avoid contact with humid air ; Be careful to prevent fires; it should not be exposed to direct sunlight ; Not suitable for long-term storage ; The prepared xanthate solution should not be left for too long, and it must not be prepared using hot water. It is easily captured by minerals such as mercury, gold, bismuth, antimony, copper, lead, and cobalt. Foaming agent 2# oil, also known as pinene oil, is a brownish-yellow or dark brown oily liquid that is flammable and can catch fire when exposed to open flames or high temperatures. In mineral processing, it helps to disperse air in the pulp, resulting in bubbles of appropriate size, good toughness, and stable properties, which serve as carriers for the flotation of molybdenum concentrate and enable the separation of minerals. The inhibitor phosphonox is a product of the reaction between phosphorus pentasulfide and sodium hydroxide, and it exhibits a significant lead-inhibiting effect in molybdenum ore flotation. Sodium thioglycolate belongs to the class of sodium thioglycolate salts; it is clear, transparent, and pale green in color, and is a slightly alkaline substance. Sodium thioglycolate has a better inhibitory effect on galena and chalcocite. Dispersant water glass is an inorganic colloidal agent, and its aqueous solution is alkaline. In flotation, it acts as an inhibitor for gangue minerals such as quartz and silicates, a good flocculent dispersant, a regulator of the pulp pH value, and also an effective sedimentation aid. Changes in the reagent system, such as the types of mineral processing chemicals, their dosage, preparation methods, addition locations, and addition methods, can all affect the results of mineral processing. Cao Qingfu 13658620726

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