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splitting manganese ore with a magnetic separation

the 7 most useful manganese ore beneficiation methods | fote machinery

the 7 most useful manganese ore beneficiation methods | fote machinery

The data recorded by Statistics in 2020 shows that although in 2019 manganese ore price fell to the bottom, the price in 2020 still gets increased to 4.5 U.S. dollars per metric ton unit CIF even under the impact of COVID-19. Manganese ore prices are forecast to remain at global prices by 2020 over the next two years, which is good news to manganese ore suppliers.

Besides, Justin Brown, managing director of Element 25said Manganese has the traditional end uses in steel, and that market is fairly stable". As people's demand for laptops and electric cars increases, the output of lithium batteries has also soared, and the most important element in lithium batteries is manganese.

Manganese ore after the beneficiation process is applied in many respects in our daily lives. Of annual manganese ore production, 90 percent is used in steelmaking, and the other 10 percent is used respectively in non-ferrous metallurgy, chemical industry, electronics, battery, agriculture, etc.

In the metallurgical industry, manganese ore is mostly used for manganese-forming ferroalloys and manganese metal. The former is used as deoxidizers or alloying element additives for steelmaking, and the latter is used to smelt certain special alloy steels and non-ferrous metal alloys. Manganese ore can also be used directly as an ingredient in steelmaking and ironmaking.

When smelting manganese-based iron alloys, the useful elements in manganese ore are manganese and iron. The level of manganese is the main indicator for measuring the quality of manganese ore. The iron content is required to have a certain ratio with the amount of manganese.

Phosphorus is the most harmful element in manganese ore. The phosphorus in steel reduces the impact of toughness. Although sulfur is also a harmful element, it has a better desulfurization effect during smelting, and sulfur is volatilized into sulfur dioxide or enters the slag in the form of calcium sulfide or manganese sulfide.

Applications in Metallurgy Manganese content (%) Ferromanganese (%) Phosphorus manganese (%) Low carbon ferromanganese 36%40% 68.5 0.0020.0036 Carbon Ferro Manganese 33%40% 3.87.8 0.0020.005 Manganese Silicon Alloy 29%35% 3.37.5 0.00160.0048 Blast Furnace Ferromanganese 30% 27 0.005

In the chemical industry, manganese ore is mainly used to prepare manganese dioxide, manganese sulfate, and potassium permanganate. It is also used to make manganese carbonate, manganese nitrate and manganese chloride.

Since most manganese ore is a fine-grained or fine-grained inlay, and there are a considerable number of high-phosphorus ore, high-iron ore, and symbiotic beneficial metals, it is very difficult to beneficiate.

At present, commonly used manganese ore beneficiation methods include physical beneficiation (washing and screening, gravity separation, strong magnetic separation, flotation separation, joint beneficiation), chemical beneficiation (leaching method) and fire enrichment, etc.

Washing is the use of hydraulic washing or additional mechanical scrubbing to separate the ore from the mud. Commonly used equipment includes washing sieves, cylinder washing machines and trough ore-washing machine.

The washing operation is often accompanied by screening, such as direct flushing on the vibrating screen or sifting the ore (clean ore) obtained by the washing machine to the vibrating screen. Screening is used as an independent operation to separate products of different sizes and grades for various purposes.

At present, the gravity separation is only used to beneficiate manganese ore with simple structure and coarse grain size and is especially suitable for manganese oxide ore with high density. Common methods include heavy media separation, jigging and tabling dressing.

It is essential to recover as much manganese as possible in the gravity concentration zone because its grinding cost is much lower than the manganese in the flotation process, and simple operations are more active.

Because of the simple operation, easy control and strong adaptability of magnetic separation can be used for dressing various manganese ore, and it has dominated the manganese ore dressing in recent years.

Gravity-magnetic separation plant of manganese ore mainly deals with leaching manganese oxide ore, using the jig to treat 30~3 mm of cleaned ore can obtain high-quality manganese-containing more than 40% of manganese. And then can be used as manganese powder of battery raw material.

The jigging tailings and less than 3 mm washed ore are ground to less than 1mm, and then being processed by strong magnetic separator. The manganese concentrate grade would be increased by 24% to 25%, and reaches to 36% to 40%.

Adopting strong magnetic-flotation desulfurization can directly obtain the integrated manganese concentrate product; the use of petroleum sodium sulfonate instead of oxidized paraffin soap as a collector can make the pulp be sorted at neutral and normal temperature, thus saving reagent consumption and energy consumption.

The enrichment of manganese ore by fire is another dressing method for high-phosphorus and high-iron manganese ore which is difficult to select. It is generally called the manganese-rich slag method.

The manganese-rich slag generally contains 35% to 45% Mn, Mn/Fe 12-38, P/Mn<0.002, and is a high-quality raw material to manganese-based alloy. Therefore, fire enrichment is also a promising method for mineral processing for low-manganese with high-phosphorus and high-iron.

Manganese ore also can be recovered by acid leaching for production of battery grade manganese dioxide for low-manganese ores. Leaching of manganese ore was carried out with diluted sulphuric acid in the presence of pyrite in the temperature range from 323 to 363 K.

After processed by hydraulic cone crusher, the smaller-sized manganese ore would be fed to grinding machine- ball mill. It can grind the ore to a relatively fine and uniform particle size, which lays a foundation for further magnetic separation of manganese ore.

It is indispensable grading equipment in the manganese ore beneficiation plant. Because by taking advantage of the natural settling characteristics of ore, a spiral classifier can effectively classify and separate the manganese ore size to help control the amount of grinding required.

The flexibility of flotation is relatively high. You can choose different reagents according to the type and grade of the ore. Although the entire process of froth flotation is expensive, it can extract higher-grade manganese ore.

The magnetic separator is a highly targeted magnetic separation device specially developed for the properties of manganese ore. The device not only has the advantages of small size, lightweight, high automation, simple and reasonable structure, but also has high magnetic separation efficiency and high output.

If you want to beneficiate high-grade manganese ore and maximize the value of manganese concentration, Fote Company is an ore beneficiation equipment manufacturer with more that 35-years designing and manufacturing experience and can give you the most professional advice and offer you all machines needed in the ore beneficiation plant (form crushing stage to ore dressing stage). All machines are tailored to your project requirements.

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

manganese ore magnetic separator

manganese ore magnetic separator

Gravity separation and magnetic separation can be involved for manganese upgrading. Gravity separation is more commonly used in manganese beneficiation with its low plant investment and low operation cost. However for some manganese ore of too fine inlay or small density difference between manganese and its attached gangue, gravity separation can not work, magnetic separation or floatation separation can be considered. In this situation, magnetic separation can be the main beneficiation way for manganese ore because floatation separation needs large investment and high operation cost and it is hard to be accepted by the miner. Intensity magnetic separation can be the core upgrading method for this kind of manganese ore. The following is about Forui manganese magnetic separator.

magnetic separation and magnetic properties of low-grade manganese carbonate ore | springerlink

magnetic separation and magnetic properties of low-grade manganese carbonate ore | springerlink

The relation between the magnetic separation behavior and magnetic properties of a low-grade manganese ore was analyzed before and after treatment by direct reduction with coal. It was found that raw ore with an initial average grade of 10.39% Mn and consisting of diamagnetic and paramagnetic minerals can be concentrated by high-intensity magnetic separation to produce a salable product with a grade of 22.75% Mn and a recovery of 89.88%. In contrast, direct reduction of the ore results in a new Mn-Fe oxide phase formed with a combination of ferromagnetic and paramagnetic properties, thereby increasing the magnetic susceptibilities of the ore by almost two orders of magnitude. The grade of Mn for the roasted ore could only be concentrated to 15.49% with a recovery of 66.67%. Therefore, it is concluded that the low-grade manganese ores with antiferromagnetic and paramagnetic (or diamagnetic, but not strongly ferromagnetic) properties could be efficiently beneficiated via high-intensity magnetic separation.

The authors are grateful to Prof. X.J. Li and Dr. D. Yang for helpful discussions and critical comments. This work was financially supported by geological survey projects (Nos. 12120113087100 and 12120113087000) of the China Geological Survey Bureau.

magnetic separation of manganese ore - fodamon machinery

magnetic separation of manganese ore - fodamon machinery

Manganese resources in the world are mainly distributed in South Africa, the former Soviet Union, Australia, China and other countries. Apart from China, the worlds land manganese ore reserves are about 17.292 billion tons.

There are many classification methods of manganese ore, which can be divided into sedimentary type, metamorphic type and weathering type according to the genesis of the deposit; manganese ore and iron manganese ore according to the iron and manganese content of the ore. According to industrial use, it can be divided into metallurgical manganese ore and chemical manganese ore. In addition, according to the natural types and associated elements of minerals, they are divided into manganese carbonate ore, manganese oxide ore, mixed ore and polymetallic manganese ore.

Manganese carbonate ore exists in various forms of manganese carbonate minerals, and its content accounts for more than 85% of the manganese content in the ore. Manganese oxide ore exists in various forms of manganese oxide minerals, and its content accounts for more than 85% of the manganese content in the ore. The manganese present in the form of various manganese carbonate minerals or manganese oxide in the mixed manganese ore accounts for less than 85% of the manganese content in the ore.

Polymetallic manganese ore is different from the above three kinds of manganese ore, in addition to manganese, it also contains other metal and nonmetal minerals. There are many manganese carbonate mines in China, accounting for about 57% of the total manganese ore. At present, manganese ore beneficiation methods include gravity separation, heavy medium-strong magnetic separation, roasting-strong magnetic separation, single strong magnetic separation, flotation, and a combination of multiple methods.

Manganese minerals are weak magnetic minerals. The strong magnetic separation of manganese ore occupies an important position. A single magnetic separation process for manganese carbonate ore and manganese oxide ore with a relatively simple composition and coarse-grained particle size can obtain better separation indexes. When sorting manganese carbonate ore, the magnetic field strength of the magnetic separator must be above 480 kA / m, while the magnetic field strength of the magnetic separator for sorting manganese oxide ore is higher, generally above 960kA / m.

Magnetic separation of manganese oxide ore. Most of the manganese oxide ore belongs to the secondary ore of the weathering leaching deposit. It has a soft texture and contains more clay minerals. It is very easy to be muddled in the process of ore and transportation. The manganese-containing grade and improvement ofcrushing, screening,beneficiationand transportation conditions all need to be washed. Coarse particles (about 5 mm or more) are sorted by re-selection methods such as jig, and fine particles (about 5 mm or less) can be separated by strong magnetic separation.

Case 1, Miaoqian mining area of Liancheng Manganese Mine in Fujian Province is a weathering crust type manganese oxide deposit, which is divided into leaching type, Deluvial type and mixed type of leaching and Deluvial, mainly leaching type. The main metal minerals in the ore are hard manganese ore, pyrolusite, manganese soil and limonite, etc., gangue minerals are mainly quartz, followed by sericite, opal, barite, and other impurities are mainly loess, clay, etc.

The ore process includes ore washing, jigging and strong magnetic separation. After crushing to less than 70 mm, the ore shall be washed, sieved and graded first, + 30 mm shall be manually separated, 4.5-30 mm ore shall be re separated by am-30 jig, and 4.5 mm particles shall be separated by qc-200 induction roller type high magnetic field magnetic separator. 35.68% of the products were selected with strong magnetic field, 41.23% of the concentrate grade and 93.6% of the recovery.

Magnetic separation of manganese carbonate ore. Manganese carbonate deposit, which belongs to marine sedimentary type, has large reserves and scale, and is an important resource for producing commercial manganese ore.

Case 1, The strong magnetic separation plant of Taojiang Manganese Mine in Hunan Province deals with Rhodochrosite and manganese calcite. After fine crushing, grinding and grading, 0.5-4 mm ore enters into cgde-210 strong magnetic separator for separation, 0-0.5 mm ore enters into SHP strong magnetic separator for separation, and the resulting concentrate is combined and sintered.

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extraction and separation of manganese and iron from ferruginous manganese ores: a review - sciencedirect

extraction and separation of manganese and iron from ferruginous manganese ores: a review - sciencedirect

Characteristics of manganese ore resources and Mn alloy products consumption are summarized.Diverse processes for extracting and separating Mn and Fe from Fe-Mn ores are reviewed.Enlarging magnetism, solubility or fusibility difference is critical to extract and separate Fe and Mn.Selecting reductants and leaching agents is important for extraction and separation of Fe and Mn.

There are abundant ferruginous manganese ores (abbr. Fe-Mn ores) in many parts of the world. For example, almost half of the manganese ore resources in India are ferruginous and more than 73% of the manganese ores in China belong to Fe-Mn ores with a low Mn/Fe mass ratio (<3). With the depletion of high grade manganese ore resources, the Fe-Mn ores are becoming important substitution resources for extracting manganese. In general, the production of Mn alloy from manganese ores requires that the Mn grade is more than 30% and the Mn/Fe mass ratio is greater than 5. During the production of electrolytic manganese or manganese chemical products, the issue of co-leaching of Mn and Fe complicates the purification procedure for the MnSO4 solution if Fe-Mn ores are used as raw materials.

Numerous approaches are reported to realize the selective extraction and separation of Mn and Fe from the Fe-Mn ores. The extraction and separation technologies cover physical beneficiation, chemical beneficiation (hydrometallurgy and pyrometallurgy) and physico-chemical combined processes. This present work reviews the technical principles, parameters and recovery efficiencies of diverse processes on the aspect of selective extraction and separation of Mn and Fe from Fe-Mn ores. This review can provide guidance for selecting appropriate methods to exploit Fe-Mn ores or other secondary resources containing Fe and Mn oxides. The authors also put forward a new route to produce manganese ferrite materials using Fe-Mn ores as the raw materials.

separation of manganese and iron for low-grade ferromanganese ore via fluidization magnetization roasting and magnetic separation technology - sciencedirect

separation of manganese and iron for low-grade ferromanganese ore via fluidization magnetization roasting and magnetic separation technology - sciencedirect

Fluidization magnetization roasting and magnetic separation technology was utilized.Iron and manganese minerals from ferromanganese ore could be individually separated.Iron concentrate with Fe grade of 69.05% at a recovery of 95.94% could be obtained.Manganese concentrate with Mn grade of 53.30% at a recovery of 90.41% was obtained.Efficient resource utilization of the ore generating any without residue was realized.

As a potential solid waste resource, low-grade ferromanganese ore has not been fully utilized or recycled. In this study, fluidization magnetization roasting and magnetic separation technology were used to recycle low-grade ferromanganese ore. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), sample vibrating magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM) were used to systematically detect the process mechanism. The results show under the optimized conditions, high-quality products of iron concentrate with iron grade of 69.05% at iron recovery of 95.94%, and a manganese concentrate with manganese grade of 53.30% at manganese recovery of 90.41% were obtained. The fluidization magnetization roasting technology can make the weak magnetic hematite in raw ore transform to the strong magnetic magnetite, while it makes the pyrolusite and braunite transform to manganosite. The newly formed mineral lattice had clear stripes and remarkable magnetization properties. After magnetic separation, magnetite and manganosite were individually separated at individual concentrates, which efficiently transforms and utilises this low-grade ferromanganese ore without any residue using this process.

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