Wechat QR code
Wechat QR code
15311826613
Click to add WeChatManganese ore is one of the important mineral elements in the iron and steel field. The demand for manganese in the ironmaking and steelmaking industries can reach more than 90%. It is mainly used as a deoxidizer and desulfurizer in the ironmaking and steelmaking processes. In addition, in the field of new energy, manganese is used as a raw material for lithium iron manganese phosphate batteries. As the penetration rate of new manganese-based cathode materials increases, the amount of manganese used in lithium batteries will increase by more than 10 times in the next few years. Then the manganese ore beneficiation and development has also entered the field of vision of many big guys. Below, the editor will introduce to you what types of manganese ore there are and the manganese ore beneficiation technology!
Common manganese ores are anhydrous and hydrous manganese oxide and manganese carbonate. There are 150 kinds of manganese minerals known now, but there are only a few manganese minerals with high manganese content that can be enriched in large quantities to form economically valuable manganese minerals. There are 5-6 species, among which the economically valuable ones are pyrolusite and durhosite, and there are also hydromanganite, brown manganese ore, black manganese ore, rhodochrosite, etc. The manganese content in these minerals can reach about 50~70%.
Secondary manganese oxide from weathered ore deposits is the main type of manganese deposit, followed by some sedimentary, thermal and Primary and secondary manganese oxide ores from liquid deposits. The manganese in this type of deposit is mainly duronite, pyrolusite and hydromanganite, often accompanied by components such as iron, nickel, phosphorus and cobalt. The gangue minerals are mostly silicate and carbonate minerals.
The nature of manganese carbonate mineral ore is more complex. The manganese mineral has finer particle size and large dissociation. It is mostly composed of rhodochrosite, calcium rhodochrosite, and Manganese calcite and rhodochrosite are the main components, often accompanied by impurities such as sulfur and iron.
Pyrolusite:Pyrolusite is often massive or kidney-shaped or earthy, and sometimes has a radial fibrous form. Pyrolusite is formed from other manganese ores. Pyrolusite can also be formed in sediments formed in swamps, lakes and seas, etc.
Black manganite: Usually a granular aggregate, which is a typical high-temperature hydrothermal fluid and contact metasomatic mineral. It is formed by endogenous or metamorphic processes, and is often symbiotic with brown manganese ore.
Hydranite: It is stalactite-like or soil-shaped, produced in low-temperature hydrothermal veins and sedimentary deposits, often symbiotic with barite and calcite.
Duromanganite: The crystals are needle-shaped or rod-shaped, usually crystalline or cryptocrystalline blocks, grape or stalactite-shaped, commonly found in the oxidation zones and sediments of manganese ore deposits in mineral deposits.
Manganese ore is more difficult to beneficiate due to its complex formation of deposits, complex mineral composition, and fine ore embedded particle size. It is currently common The manganese ore beneficiation technology is mainly based on physical beneficiation and chemical beneficiation.
Manganese ore physical beneficiation technology mainly includes ore washing and screening, gravity separation, strong magnetic separation, flotation and combined beneficiation. (Gravity separation-magnetic separation method, strong magnetic separation-flotation method) five types.
Manganese ore washing and screening technology:Ore washing mainly uses hydraulic washing or additional mechanical scrubbing to separate the ore and mud. Commonly used equipment includes ore washing screens, cylinder washers and trough washers. Usually, the ore washing operation is accompanied by the screening operation, such as directly flushing water on the vibrating screen or sending the ore (clean ore) obtained by the ore washing machine to the vibrating screen for screening. Screening can be used as a stand-alone operation to separate products of different particle sizes and grades for different uses.
Manganese ore gravity separation technology: Generally only suitable for sorting manganese ore with simple structure and coarse embedded particle size. Especially dense manganese oxide ores. Commonly used gravity separation methods include heavy media beneficiation, jig beneficiation and shaking table beneficiation. Before gravity selection, the manganese ore is first crushed (crushed to 6-0mm or 10-0mm) and then classified. The coarse-grained manganese ore particles enter jigging. machine for sorting; fine manganese ore particles are sent to a shaking table for sorting.
Manganese ore strong magnetic separation technology:Manganese minerals are weakly magnetic minerals. When the magnetic field strengthHo=800-1600kA/m ( 10000-20000oe)It can be effectively recovered in a strong magnetic field magnetic separator, which can generally improve the manganese grade by 4%-10%. This technical method is simple to operate, easy to control, and has strong adaptability.
Manganese ore gravity separation-magnetic separation technology: First, the manganese ore with qualified particle size is fed into the magnetic separator for weak magnetic separation to obtain strong magnetic manganese concentrate and weak magnetic separation tailings. The ore and tailings are fed into the magnetic separator for strong magnetic separation to obtain strong magnetic separation tailings and concentrates, and the concentrates are fed into gravity separation equipment for separation to obtain gravity separation manganese concentrates and tailings.
Manganese ore strong magnetic separation-flotation technology:First, the manganese ore with qualified particle size is fed into the strong magnetic separator for strong magnetic separation, and then enters the flotation machine for flotation desulfurization. , using sodium petroleum sulfonate as collector to achieve flotation. In this method, strong magnetic separation can not only effectively remove sludge, but also improve the selection quality for subsequent flotation.
Manganese ore chemical beneficiation technology mainly includes two types: leaching method and fire enrichment method.
Manganese ore leaching technology: There are direct leaching, roasting leaching and biological leaching. Among them, direct leaching methods include dithionate method, sulfur dioxide method, ferrous sulfate method, etc. Taking the sulfur dioxide manganese leaching method as an example, the manganese ore is slurried, sulfur dioxide gas is introduced, and the manganese oxide in the ore is converted into MnSO4 and MnS2O6 . Add lime milk to the filtrate to produce manganese hydroxide precipitation, and obtain solid manganese hydroxide after filtration. This method is suitable for processing low-grade, fine-grained manganese oxide ores.
Manganese ore pyrotechnic enrichment technology: It is an important method for processing high-phosphorus and high-iron refractory manganese-poor ores. It utilizes manganese, phosphorus, Depending on the iron reduction temperature, the temperature is controlled in a blast furnace or electric furnace to selectively separate manganese, phosphorus and iron.
The above is an introduction to the types of manganese ore and the seven manganese ore beneficiation technologies. In the actual mineral processing plant, how to choose the manganese ore beneficiation technology requires a manganese ore beneficiation test and analysis, and then determines based on the properties of the manganese ore. Xinhai Mining is a mining industry company that provides mineral processing test, mineral processing process design, mineral processing construction plan design, and mineral processing plant equipment production, installation and commissioning. Chain service companies, if you have any needs, please feel free to consult Xinhai Mining Equipment.
Consultation
153-1182-6613
Consult
Message
