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Click to add WeChatGold-antimony ore is an important mineral resource, containing two main metal elements, gold and antimony. Usually, gold exists in the ore in the form of natural gold, gold-silver alloy, etc., while antimony mainly exists in the form of antimony minerals such as stibnite. In addition to these two minerals, it may also contain other impurity minerals, such as quartz, feldspar, mica, etc., and the mineral composition is relatively complex. With the development of the economy and the continuous increase in demand for metals, the efficient development and utilization of gold-antimony ore resources has important practical significance. This article mainly introduces the value of gold and antimony and the mixed flotation process of gold-antimony ore.
The value of gold:Gold is a rare and precious metal with extremely high economic value. In the financial field, gold is used as a reserve currency and investment tool; in the industrial field, gold is widely used in electronics, aerospace, jewelry and other industries. Recovering gold from gold antimony ore can provide the country with important gold resources to meet the needs of economic development.
The value of antimony:Antimony is an important strategic metal with multiple uses. In the field of flame retardants, antimony oxides are widely used in flame retardant materials such as plastics and rubber; in the field of alloys, antimony can improve the hardness and strength of alloys; in the chemical field, antimony compounds are used to make catalysts, pigments, etc. Recovering antimony from gold-antimony ore can meet the demand for antimony in industrial production and promote the development of related industries.
Flotation is a mineral processing method that utilizes the difference in physical and chemical properties of the mineral surface and adds flotation agents to selectively attach the target minerals to the bubbles, thereby achieving mineral separation. For gold-antimony ore, flotation mainly utilizes the difference in wettability between the surface of gold and antimony minerals and other impurity minerals, so that the gold-antimony minerals can be adsorbed by the flotation agent, attached to the bubbles and float to the surface of the slurry to form a foam product, while the impurity minerals remain in the slurry and become tailings.
Collectors, frothers and regulators are often used in the mineral processing process. Among them, the role of collectors (xanthate, black frother, sulfur and nitrogen) is to selectively adsorb on the surface of the target mineral during the flotation process to make it hydrophobic; the role of frothers (pine oil, No. 2 oil) is to reduce the surface tension of the pulp and make the air form stable bubbles in the pulp; the role of regulators (pH regulators, inhibitors, activators (activating the target mineral)) is to adjust the physical and chemical properties of the pulp and improve the flotation effect.
Gold Antimony Ore Mixed Flotation Process is a beneficiation method that first floats out gold and antimony minerals at the same time to obtain mixed gold ore, and then separates them. During flotation, gold and antimony minerals have similar floatability under the action of flotation agents. By adding appropriate flotation agents, gold and antimony minerals can be adsorbed by bubbles at the same time and float to the surface of the slurry to form a mixed concentrate. Then, through subsequent separation processes, gold and antimony minerals are separated respectively to obtain gold concentrate and antimony concentrate. The process is as follows:
Crushing and grinding: First, crush and grind the gold-antimony ore to make the minerals in the ore reach a monomer dissociation state. Crushing is to use mechanical force to divide large pieces of material into smaller particles. According to the particle size requirements, it can be divided into coarse crushing, medium crushing and fine crushing; grinding is to grind it after crushing, and its purpose is to continue to reduce the ore particles until the appropriate particle size distribution is achieved. Similarly, according to the particle size requirements of the final product, open-circuit circulation system and closed-circuit circulation system can be selected.
Floatation: The product after grinding is fed into the flotation machine for flotation. During the flotation process, it is necessary to add a regulator first to adjust the physical and chemical properties of the pulp, and then add a collector and a frother so that the gold-antimony minerals can be adsorbed by bubbles and float to the surface of the pulp to form a mixed concentrate. During the flotation process, it is necessary to control the parameters such as the amount of flotation reagents, flotation time, and flotation temperature to ensure the flotation effect.
Mixed concentrate treatment: The mixed concentrate obtained by flotation needs to be further treated to separate gold and antimony minerals. Generally speaking, gravity separation, magnetic separation, chemical separation and other methods can be used for separation. Among them, gravity separation and magnetic separation mainly use the density and magnetic differences of gold and antimony minerals for separation, while chemical separation uses chemical reactions to separate gold and antimony minerals. Tailings treatment: The tailings after flotation contain a certain amount of valuable metals and other impurity minerals, which need to be reasonably treated and utilized. Generally speaking, tailings dry stacking, tailings filling and other methods can be used for treatment to reduce pollution to the environment and improve resource utilization.
The mixed flotation process of gold-antimony ore is suitable for various types of gold-antimony ores, and has relatively low requirements on the grade, particle size, and mineral composition of the ore. This process can adjust the type and dosage of flotation reagents according to different ore properties and requirements to obtain ideal flotation effects. In practical applications, it is necessary to reasonably select flotation reagents and process flows according to the properties and requirements of the ore to achieve suitable flotation effects.
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