The magnetic separator is the key beneficiation equipment for separating magnetic minerals from non-magnetic minerals or minerals with magnetic differences. The process is based on the different components in the separated materials, which means that in the working magnetic field, the different magnetic field forces and other forces received by different particles are used to separate different materials.
Froth flotation machine is generally used for the concentration of sulphide ores. The principle behind froth flotation process is that sulphide ores are preferentially wetted by pine oil whereas gangue articles are wetted by water.
In this process, the suspension of a powdered ore is made with water. Collectors like pine oil, fatty acids and xanthate are added to it. Froth stabilizers like wrestles and any line stabilized the froth. The mineral particles become wet by oils while gangue particles by water.
A rotating paddle agitates the mixture and draws air in it, as a result, froth is formed which carries the mineral particles. The froth is light and skimmed off, and it is then dried for the recovery of the old particles.
In order to realize the separation of different minerals through magnetic separation, it is necessary to ensure that there is a relatively obvious difference in force between different magnetic materials, especially the difference in magnetic field force.
Minerals in nature, due to their different atomic structures, exhibit different magnetic properties under the action of a magnetic field, and different minerals exhibit large magnetic differences.
Minerals are divided into non-magnetic minerals, weak magnetic minerals and strong magnetic minerals. Among them, strong magnetic minerals are the least. There are dozens of weak magnetic minerals, while non-magnetic minerals are numerous in variety.
Of course, the strength of magnetism between minerals is relative, and it is relative to the strength of the external magnetic field. With the development of magnetic separation technology and magnetic material technology, its definition has always changed.
After crushing to less than 70 mm, the ore need to be washed, sieved and classified, firstly got material with + 30 mm needs manual beneficiation, then 4.5-30 mm ore is dressed by jig, and last ore with -4.5 mm should be processed by roller-type strong magnetic field magnetic separator.
Wolfram ore coarse concentrate magnetic separation process: before separation, the material is crushed to-3 mm by roll crushers, then they are screened into three levels which are 0.83 ~ 3 mm, 0.2 ~ 0.83 mm and 0 ~ 0.2 mm, and finally you can get wolframite concentrate by magnetic classification beneficiation.
Crystalline graphite has good natural floatability, so froth flotation would be best for processing it. Since the size of graphite flakes is one of its most important quality indicators, a multi-stage grinding and multi-beneficiation process is adopted to remove large flake graphite as soon as possible.
Copper is the main valuable recyclable element in ore, and its content is 0.77%. Copper ore contains lightly oxidized sulfide ore, and the copper in the ore is mainly in copper sulfide minerals. For copper ore, there is 0.45% of primary copper sulfide, accounting for 60.57% of the total copper; secondary copper sulfide 0.27%, accounting for the total copper 36.34%; free copper oxide and combined copper content is relatively less.
The recoverable copper in the ore is mainly stored in chalcopyrite, chalcocite and a small amount of copper-bearing sulfide minerals such as copper blue and azurite, with a copper content of about 1.72%.
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Magnetic separation is a widely used mineral separation method based on the difference of magnetic properties between different minerals, separate target minerals in the inhomogeneous magnetic field. The magnetic separator is used for mineral ore dressing of magnetite, pyrrhotite, ilmenite, wolframite, manganese, rare earth ore and other materials with a particle size of less than 3 mm, and is also used for iron removal operations of coal, non-metallic minerals, building materials and the like. Types of magnetic separator 1. According to the processing media, it can be divided into dry type and wet type magnetic separator. (1) Dry-type magnetic separator mainly for sorting large and coarse grains of strong magnetic ore and fine-grained weak magnetic ore. (2) Wet type magnetic separator mainly for sorting fine-grained strong magnetic ore and fine-grained weak magnetic ore. 2. According to the strength of the magnetic field, the magnetic separator is divided into the weak magnetic separator (H<2500 guass), medium magnetic separator (H<6000 Guass), and strong magnetic separator (H>6000 Guass).
JXSC, a magnetic separator manufacturer, has four types of magnetic separator machine: Dry drum magnetic separator, High-intensity magnetic separator, Three-disc dry magnetic separator, and Wet drum magnetic separator.
Wet type magnetic separator MAX. magnetic force: 8000gs Application: separating the magnetic mineral from the 3~0 mm fine-grain mixture. Especially suitable for iron removal and purification in non-metallic minerals, such as quartz sand and potassium feldspar. The magnetic separator uses magnets to attract magnetic materials to separate out the magnetic components of the mixture feed. When the slurry enters the magnetic field, the ferromagnetic mineral is adsorbed on the surface of the cylinder, the weak magnetic and non-magnetic minerals are washed out by the water flow, all of them are discharged from different outlets. Features Feeding and discharging continuously low downtime. High magnetic force and high magnetic field gradient.
The three-disc electromagnetic separator is suitable for dry separation of titanium ore, rare earth ore, tungsten tin ore, chromite, niobium and tantalum ore, limonite, zirconium, disthene, monazite, andalusite, disthene, feldspar, quartz and other metallic minerals with different magnetic properties, or for iron removal of non-metallic materials. Features 1. Very high magnetic field intensity 16000gauss - 20000gauss 2. This separator can separate four different minerals in one time. 3. This separator can get the final concentrate of three to four minerals. 4. Ta & Nb grade can reach 60% by using this separator. 5. It's easy to install, adjust, and operate. 6. The magnetic intensity of each disc is adjustable from 1000-20000 gauss, could be used for other mineral concentrations.
The dry magnetic separator is used for sorting dry magnetic minerals, and is mainly used for selecting large-sized, coarse-grained ferromagnetic ores and fine-grained weak magnetic ores. It has three types of single disc (diameter = 900 mm), double disc ( = 576 mm) and three discs ( = 600 mm). The magnetic field strength can reach 880-1440 kA/m. The magnetic system of the dry magnetic separator is made of high-quality ferrite material or composited with rare earth magnet steel. The average magnetic induction intensity of the cylinder table is 100-600 mT. The factors affecting the dry magnetic separator are mainly ore properties (ore grade, magnetism, particle size and moisture), equipment performance and operation. Features High separating efficiency, do great help for ultra-poor magnetite; water-saving, suited for the water-deficient area; light weight, reliable operation and convenient maintenance.
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.
Since the development of magnetic separators in the last century, magnetic separation has been regarded as an effective method for mineral recovery. With the continuous development of new machines and the continuous improvement of performance, we can now say with certainty that magnetic separation is highly accurate.
The choice of magnetic separator depends on a variety of considerations, the most important of which is the particle size distribution, the magnetic performance distribution of the particles to be separated from each other, and the required machine output.The selected magnetic separator must be suitable for the purpose of use and have sufficient capacity. In order to select the most suitable separator, when inquiring about the separator, conditions like purpose of use, material grain are important to our engineer, as detailed below:Usage (improving purity, collecting valuable magnetic minerals, etc.)Type, composition of raw materialsRaw material granularityMoisture content bulk densityType, shape and particle size of mixed magnetic substanceThe amount of raw materials processed per hour (kg/h, m3/h)Other special conditions
Dry low-intensity magnetic separatorThere are two types of dry low-intensity magnetic separator1. Use suspended magnets, magnetic pulleys and plate, and grate magnets to remove iron and strong magnetic impurities2. The magnetic drum is mainly used to concentrate the valuable components of strong magnetism.
Wet low-intensity magnetic separatorsDrum magnetic separator is currently the most commonly used wet low-intensity magnetic separator. With the advent of ferrite permanent magnets, the concept of electromagnetic drums has been almost completely replaced by permanent magnet-based components. This type of magnetic separator is mainly used for the recovery of heavy media, such as the recovery of magnetite or ferrosilicon used in the separation of heavy media.Concentration of ferromagnetic ores (such as magnetite) is another application of drum magnetic separators. The availability of rare-earth permanent magnetic materials and their ever-increasing availability further expand the applicability of cylindrical magnetic separators to media and even weak magnetic materials.Dry high-intensity magnetic separatorsThe mineral industry has always had a great demand for beneficiation equipment capable of performing coarse and weak magnetic minerals.The development of permanent magnetic materials and the improvement of their magnetic properties are undoubtedly one of the main driving forces for the progress of dry magnetic separation technology.
The magnetic force generated by the magnetic roller separator constructed with the rare earth permanent magnet material exceeds the magnetic force generated by the electromagnetic high-strength magnetic separator.Although the rare earth permanent magnetic field cannot be changed easily, we can optimize the configuration of this type of magnetic roller by reasonably selecting permanent magnetic materials, so as to design a magnetic separator for processing materials of different sizes and different magnetic susceptibility distributions.Wet high-intensity high-gradient magnetic separatorsContinuous wet high-strength high-gradient magnetic separators (WHIMS or HGMS) are designed and manufactured to recover materials that were previously considered to be too fine and too magnetically weak, which greatly expanded the applicability of magnetic separation.Kaolin purification, beneficiation of very weakly magnetic iron ore, titanium oxides, and beach sand are examples of successful applications of high-strength and high-gradient magnetic separators.
High gradient magnetic separatorThe high gradient magnetic separator greatly increases the types of optional minerals and widens the upper and lower particle size limits.Handle occasions where the content of magnetic materials is extremely low and the particle size is very thin. The high-gradient magnetic separator effectively improves the separation rate and recovers valuable minerals, which not only saves a lot of water resources, but also improves the concentration of concentrate slurry and simplifies the process flow.