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 (%)
Phosphorus manganese (%)
Low carbon ferromanganese
Carbon Ferro Manganese
Manganese Silicon Alloy
Blast Furnace Ferromanganese
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.
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manganese mining process | manganese mining | mining machine price
Manganese ore beneficiation method
The types of manganese ore can be basically divided into manganese oxide ore, manganese carbonate ore, polymetallic manganese ore, etc. Therefore, manganese dressing equipment is also diverse. Manganese ore is generally sorted by gravity separation beneficiation method. Manganese ore with finer and more uniform grain size can be improved by strong magnetic separation or flotation. The following is a brief introduction to the ore dressing equipment of manganese ore mining process.
Manganese gravity separation process flow: the raw ore enters the silo, is broken into a rough jaw crusher through a belt conveyor, and then enters the fine crusher for secondary crushing. After two crushed ores, the ore is basically free of large stones. The vibrating screen is screened. The crushed ore is divided into two grades of 0-8mm and 8-30mm. The coarse ore larger than 30mm is returned to the crusher for crushing. 0-8mm grade manganese ore is fed into the 2LTC6109/8T jig for gravity sorting, and 8-30mm grade manganese ore enters the AM30 jig for re-election, respectively obtaining 0-8mm grade manganese concentrate and 8 -30mm grade manganese concentrate.
The manganese ore magnetic separator produced by the Shicheng County Mining Machinery Plant in Jiangxi Province is a dry type strong magnetic separator, which uses high-quality NdFeB. The magnetic field strength of the strong magnetic roller made of the material is up to 15000 Gauss, which can effectively sort a variety of weak magnetic minerals such as hematite, limonite, mirror iron ore, manganese ore and garnet.
Manganese ore magnetic separator is mainly used for magnetic beneficiation of minerals such as medium-sized, fine-grained manganese oxide ore and manganese carbonate ore mining process. It has the advantages of high efficiency, energy saving, environmental protection, dry beneficiation and waterless operation.
The specific gravity difference between manganese and waste rock in manganese oxide ore is large. The method of gravity beneficiation can carry out an efficient sorting operation for most manganese oxide ore. The main gravity separator equipment is the jig machine. The manganese mine jig separator produced by Shicheng County Mining Machinery Factory in Jiangxi Province has various models for customers to choose. It can efficiently jig ore dressing of 0-50mm manganese oxide ore with excellent ore dressing effect.
Manganese ore jig is mainly used for manganese ore beneficiation of coarse, medium and fine grain inlays. It has the advantages of high efficiency, energy saving and environmental protection.
Manganese ore can also be sorted by the flotation method. The manganese ore flotation machine is mainly used for the flotation of manganese carbonate ore and polymetallic manganese ore, and is suitable for ore sorting of fine-grained inlays.
There are many types of manganese ore mining process methods and manganese ore beneficiation equipment. According to different mineral properties, different beneficiation processes and settings can be used to obtain better beneficiation indexes. The specific process is also commonly used in washing machines, vibration. Auxiliary equipment such as a sieve, ball mill, crusher, electromagnetic vibrating feeder.
Mining Equipment Manufacturers, Our Main Products: Gold Trommel, Gold Wash Plant, Dense Media Separation System, CIP, CIL, Ball Mill, Trommel Scrubber, Shaker Table, Jig Concentrator, Spiral Separator, Slurry Pump, Trommel Screen.
manganese mining solution - mineral processing
Manganese is widely distributed in nature, and almost all kinds of ores and silicate rocks contain manganese. In modern industry, manganese and its compounds are widely used in various economic fields, of which the iron and steel industry is one of the most important fields. The amount of manganese used is as high as 90%-95%, which is mainly used as a deoxidizer and desulfurizer for iron and steelmaking.
Manganese oxide oreManganese oxide ore is mainly composed of secondary manganese oxide ore of weathered deposits, in addition to some primary and secondary manganese oxide ore of sedimentary and hydrothermal deposits. The manganese minerals in the manganese oxide ore are mainly dolomite, pyrolusite and hydromanganese ore; the gangue minerals are mainly silicate and carbonate minerals, often accompanied by iron, phosphorus and nickel, cobalt and other components.
Manganese carbonate oreThe manganese minerals in sedimentary manganese carbonate ore mainly include rhodochrosite, calcium rhodochrosite, manganese-containing calcite and rhodochrosite; gangue minerals include silicate and carbonate minerals, often accompanied by impurities such as sulfur and iron. The ore is generally more complex, and the particle size of the manganese mineral inlay is as fine as micrometers, which is not easy to dissociate, and it is often difficult to obtain a higher concentrate grade.
Because most manganese ores are fine-grained or fine-grained, and there are a considerable number of high-phosphorus ores, high-iron ores and symbiotic (associated) beneficial metals, it is very difficult to classify. At present, the commonly used manganese ore beneficiation methods include physical beneficiation (washing and screening method, gravity separation method, strong magnetic separation method, flotation method, combined beneficiation method), chemical beneficiation (leaching method) and special beneficiation (fire method enrichment method) ).
Ore washing mainly uses mechanical scrubbing machine to separate the ore from the mud. Commonly used equipment includes ore washing sieve, cylindrical ore washing machine and trough ore washing machine. Usually, the ore washing operation is accompanied by the sieving operation. Directly flush the water on the vibrating screen or send the ore (net ore) obtained by the ore washing machine to the vibrating screen for screening. Screening can be used as an independent part to separate products of different particle sizes and grades for different uses.
At present, the gravity separation method is only suitable for sorting manganese ore with a simple structure and coarser particle size, especially manganese oxide ore with a higher density. Commonly used gravity separation methods include heavy-medium beneficiation, jig beneficiation and shaker beneficiation.The beneficiation process of manganese oxide ore is generally to crush the ore to 6-0mm or 10-0mm, and then to classify, coarse grade particles are sent to jig sorting, and fine grade particles are sent to shaker for sorting.
Manganese minerals are weak magnetic minerals (specific magnetization coefficient X=1010-6~60010-6cm3/g), can be effectively recovered in a strong magnetic field magnetic separator with a magnetic field strength of Ho=800-1600kA/m (10000-20000oe), and the grade of manganese can generally be increased by 4-10%.Because the magnetic separation method has the characteristics of simple operation, easy control, and strong adaptability, it is widely used in the selection of various manganese ores, and various new coarse, medium, and fine-grained strong magnetic machines have also been successfully developed.
The strong magnetic-flotation method has good adaptability. The strong magnetic separator not only effectively removes the slime, but also improves the selection grade of flotation. Strong magnetic-flotation desulfurization can directly obtain comprehensive manganese concentrate products.Sodium petroleum sulfonate instead of oxidized paraffin soap as collector can make the ore pulp sort at neutral and normal temperature, saving medicine consumption and energy consumption.
Generally, manganese ore leaching methods include direct leaching, roasting leaching and biological leaching. Among them, the direct leaching method includes the hydrosulfite method, sulfur dioxide method, ferrous sulfate method and so on.Taking the leaching method of sulfur dioxide for manganese as an example, the manganese ore is slurried, and sulfur dioxide gas is introduced, and the manganese oxide in the ore is converted into MnSO4 and MnS2O6. Lime milk is added to the filtrate to produce manganese hydroxide precipitation, and solid manganese hydroxide is obtained after filtration. This method is suitable for processing low-grade, inlaid fine-grained manganese oxide ores.
The above are common manganese ore beneficiation methods. In actual production, most of the manganese carbonate ore beneficiation methods use strong magnetic separation, heavy medium beneficiation method and flotation method.The manganese oxide ore is mainly adopts gravity separation method, and the ore washing-heavy separation-reduction roasting-magnetic separation-heavy separation process flow is mostly used. Of course, it is often necessary to combine two or more beneficiation methods for refractory manganese ore.
manganese ore processing technology and equipment - jxsc machine
The earliest countries in the world to use manganese minerals are Egypt, ancient Rome, India and China. The discovery of Manganese, however, came much later, when it was discovered by Swedish mineralogist G. Gahn reduced manganese from pyrolusite in 1774. South Africa, Ukraine, Australia, Brazil and India are the largest reserves of manganese. Manganese mineral application Manganese products include metallurgical manganese ore, manganese carbonate ore powder, chemical industry use and battery use manganese dioxide ore powder. The metallurgical, light industrial and chemical sectors that use manganese ore products have different quality requirements for manganese ore products according to different uses.
Manganese ore distribution The distribution of manganese ore in the world is not only uneven, but also the grade of manganese ore varies greatly in different areas. Manganese-rich ore resources are mainly concentrated in South Africa, Gabon, Brazil and Australia. For example, the Kalahari mine in South Africa has a manganese ore grade of 30-50 percent, the Groote Eylandt mine in Australia has a manganese ore grade of 40-50 percent, and India, Kazakhstan and Mexico are medium-grade manganese resource countries. The low-grade manganese, about 35%-40 %, mainly in Ukraine, China and Ghana, it needs to be beneficiated and artificially enriched before it can be sold as a commodity ore (grade more than 35%).
Because most of the manganese ores are distributed in fine or micro-fine particles, and there are quite a lot of high-phosphorus ore, high-iron ore, and associated metals, so it is quite difficult for manganese mineral processing. At present, the common beneficiation methods of manganese ore are mechanical separation (including ore washing, screening, gravity separation, strong magnetic separation, and flotation), pyro-concentration, chemical separation and so on.
Ore Washing is the use of hydraulic washing or additional mechanical scrubbing to separate the ore from the mud. Common Equipment ore washing screen, drum washing trommel machine and trough ore washer. Washing operations are often accompanied by screening, such as washing directly on the vibrating screen or sending the ore obtained by the washing machine to the vibrating screen. Screening can be used as an independent operation to separate products of different granularity and grade for different purposes.
At present, gravity separation is only used to separate manganese ore with simple structure and coarse particle size, especially for manganese oxide ore with high density. The common methods are heavy medium dressing, jigging dressing and shaking table dressing. The technological process of dealing with manganese oxide ore is generally crushing the ore to 6 ~ 0 mm or 10 ~ 0 mm, then classification, jigging at the coarse level and shaking at the fine level. The gravity separation equipment is mostly Haz reciprocating mineral jig and 6-S type shaking table.
Manganese minerals are weak magnetic minerals, which can be recovered from high magnetic field separators with magnetic field strength Ho 800 ~ 1600KA / M (10000 ~ 20000oe), generally increasing manganese grade by 4% ~ 10 %. Because of its simple operation, easy control and strong adaptability, magnetic separation is widely used to separate all kinds of manganese ores. Various new types of coarse, medium and fine grain strong magnetic machines have been developed successively. At present, the most common application is medium-grain high-intensity magnetic separators, coarse-grain and fine-grain high-intensity magnetic separators followed, fine-grain high-intensity magnetic separators are still in the experimental stage.
Take the Liancheng manganese processing plant as an example, it mainly deals with leaching type manganese oxide ore, using AM-30 jig machine treat 30 ~ 3 mm cleaning ore, can obtain high-quality manganese concentrate containing more than 40% manganese mineral. The grade of manganese concentrate should be increased by 24% ~ 25% to 36% ~ 40% after the jigging tailings and washed ores with diameters less than 3mm are ground to less than 1m and separated by high-intensity magnetic separator.
Zunyi manganese mine adopts high intensity magnetic flotation separation technology, it mainly processes with manganese carbonate ore with low content of manganese, low content of phosphorus, and high content of iron. Ore grinding machine has rod mill and ball mill, all in wet type grinding machines, combines with the SHP-2000 type strong magnetic separation machine and CHF pneumatic flotation machines. After many years of production test, it turns out that the magnetic flotation separation processing method is suitable for manganese ore dressing application.
Pyrometallurgical beneficiation of manganese ore is a kind of ore dressing method for treating high-phosphorus and high-iron poor manganese ore. Its working principle is that selective separate manganese, phosphorus, iron by controlling the furnace temperature.
The pyrometallurgical enrichment process is simple and stable, which can effectively separate iron and phosphorus from ore and obtain enrich manganese slag with a high content of manganese, low content of iron, and low content of phosphorus. This manganese-rich slag generally contains 35% ~ 45% MN, Mn/Fe ratio 1238P/Mn<0.002, it is a kind of high-quality manganese alloy raw material, and it is difficult for the natural manganese ore to reach the above 3 indexes at the same time. Therefore, pyrometallurgical enrichment is a promising mineral processing method for refractory ores with high phosphorus, high iron and low manganese content.
Mainly have the vibrating feeder, PE coarse jaw crusher, PEX fine jaw crusher, vibrating screen, bin, pendulum feeder, electro-vibrating feeder, ball mill, spiral classifier, high-frequency screen, mixing tank, flotation machine, concentrator, filter press, filter separator, dryer and so on.
These mining machines also suited for Beneficiation of weakly magnetic minerals, such as hematite, limonite, ilmenite, wolframite, tantalum-niobium, etc. Non-metallic mineral iron removal and purification, such as quartz, feldspar, nepheline, fluorite, sillimanite, lithium, kaolinite and so on. JXSC Machine, mining machines supplier and ore solutions designer, established in 1985.
flotation manganese ore - froth flotation (sulphide & oxide) - metallurgist & mineral processing engineer
Consider providing some additional details - e.g. goals for the concentrate (Mn and impurity levels), mineralogy and liberation details of the ore, etc. Have you completed a basic search of the internet?
Mineralogy would be a good start - I presume that we are dealing with pyrolusite and what types of carbonates: limestone, dolomite, Also grain sizes and associations.Why have you gone for flotation?With the SG differences, gravity is an obvious choice, at least for pre-concentration.Haven't seen any pyrolusite flotation done, however no doubt possible based on other 'oxide' flotation systems.
Just need to identify the surface charge (IEP, ZPC) of the manganese mineral as a function of pH, look up the surface charge of the gangue minerals at the various pHs and then select your collector(s) (anionic vs. cationic).
Conduct some standard test work - grind size determination, reagent types and concentrations (pH modifier types, frother, collectors, activators, depressants) plus pH, flotation residence time, number of cleaning stages, where to recycle tailings, need for a re-grind, etc. and when you have that sorted, do a locked cycled test to confirm what the recoveries and grades may look like in a large scale circuit.Since it is an unproven process, you will need to do at least a pilot plant trial; if the project requires investment from a banker or the like, a larger scale continuous demonstration plant will be required.
Ore is 60 % carbonate and 40 % oxide , probably needed first step to be fried in a rotary kiln to turn the oxide of which are easier to perform with lucenjetosulfurnakiselina after dithionate method . I would like to ask for help if the lowest limit of manganova about this process because after article Kemetko for site content Artillery Reed ore with an average composition of 2.4 to 4.2 % manganese . What is the boundary or multistage extraction is important to get the electrolysis manganese.
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