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Click to add WeChatPyrite is mostly found in sedimentary pyrite deposits, polymetallic pyrite deposits and skarn-type pyrite deposits. Pyrite includes pyrite, marcasite, pyrrhotite and other minerals, among which pyrite is the more common. Pyrite resources are abundant, and the economic rationality of the mineral processing process needs to be considered when recycling.
In the mineral processing process, pyrite is generally separated by flotation. Depending on the properties of pyrite ore, single or combined processes such as flotation and gravity separation can be selected. Recycle. In this article, we will take you to understand Pyrite beneficiation process.
The single gravity separation process of pyrite is generally used in ores with simple properties, coarser particle size or uneven particle size. Ore, for pyrite in lead-zinc ore or chalcopyrite flotation tailings, can be recovered by a single flotation method. This process generally uses Jig, shaker, spiral chute, Hydrocyclone and other gravity separation equipment have the characteristics of simple process, simple equipment maintenance, low energy consumption and low mineral processing cost, but at the same time, pyrite The recovery rate is also lower.
The flotation process is the main process of pyrite. Pyrite is often produced in carbonate or silicate rocks during the mineralization process, which contains a large amount of silicon and calcium. Pyrite ore is dominated by carbonate gangue minerals, and the gangue mineral is mainly dolomite. , calcite, etc. These minerals are harmful impurities in the subsequent preparation process of pyrite and consume a large amount of acid, so they need to be removed in an alkaline medium.
Single pyrite generally uses xanthate as a collector, among which butyl xanthate is more commonly used. When pyrite is oxidized, the flotation effect will be affected to a certain extent. At this time, sulfuric acid, oxalic acid and other agents can be added as activators to improve the flotation recovery rate of pyrite.
When pyrite contains chalcopyrite, galena, sphalerite and other valuable metal associated sulfide ores, other valuable metal sulfide ores need to be flotated first. At this time, the pyrite is In order to improve the concentrate grade of other target minerals, lime, sodium sulfide and other inhibitors are generally used to inhibit pyrite under alkaline conditions. After other co-associated minerals are recovered, sulfuric acid can be used as an activator for pyrite, and then the pyrite is recovered by flotation.
This process is mainly suitable for gravity separation of pyrite with uneven particle size or brittle and easy grinding. - The combined process of flotation is generally as follows: raw ore is coarsely ground and classified, and appropriate gravity separation equipment is used for separation to obtain a part of the pyrite concentrate, and then the gravity-separated middlings and tailings are flotated using appropriate flotation processes. Carry out regrinding and re-selection operations to obtain high-quality pyrite concentrate.
The above is an introduction to the three common beneficiation processes of pyrite ore. It should be noted that when recycling pyrite, the economic rationality of the ore dressing process should be considered, and high-grade concentrates should be considered as much as possible if the properties of the ore permit. Therefore, the editor recommends analyzing and testing the ore first to find out the nature and composition of the ore, and formulating the process in a scientific and reasonable manner to avoid economic losses and waste of resources.
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