differences and applications of magnetic separation and froth flotation | fote machinery
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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eriez lab equipment
Eriez offers a wide variety of processing, mining and flotation laboratory equipment for sale and for sample trials. This equipment is offered around the world. To shop, simply find the equipment you're interested in, review specs and pricing and then provide a ship to and we'll get a final quote and delivery.
Lab equipment includes Jaw crushers, Hammer mills, Pulverizers, Rolls crushers, Ball/Rod mills, Lump breakers/Finger crushers, Test Sieves and Sieve shakers, Drum/Tumble mixers, Cone/V-blenders, Filter presses, SG/ Pulp density scales, Davis tube testers, magnetic separators, flotation equipment and vibratory feeders.
eriez - size reduction and laboratory equipment
The range of MACSALAB Jaw Crushers is ideal for primary crushing of samples of moderately hard materials, including coal, limestone, ore, minerals and bricksand rubble. Units are sturdily constructed in Cast Iron and utilise reversible hardwearing Manganese Steel jaws.
MACSALAB Rolls Crushers are designed for secondary reduction after jaw crushing. These smooth roll crushers will rapidly reduce coal, ore and hard rock from a maximum feed size of 20mm to fine sand. Ruggedly constructed & easy to operate. Breakage of material is by nipping action with minimal fines generated.
The 200 Cross Beater Lab Mill is used for crushingcoal, chemicals, spices, bricks, soil, grain, ores and minerals, concrete and many more materials in the medium hard range. Once the material is fed into the feed chute, it quickly flows into the mill grinding chamber where it is pulverised against the chamber lining by impact with the fast moving hardened hammers.
The MACSA 300 Overhung Hammermill (Disintegrator Mills) have been introduced to satisfy the needs of laboratories, research institutions and industry requiring size reduction on a semi production scale. MACSA 300 Overhung Hammermills have been successfully installed in thecoal, mineralsand ore, sugar, food, chemicalsand fryable grain.
MACSA Impact Hammer Mills are specially designed and fabricated for the reduction of medium to hard friable materials. Machines can be designed & manufactured with different combinations of hammers, screens, motors & housings to suit your specific application and requirements.
Known as a Barrel Mill, a Swing-Mill, a Ring Mill or a Stone & Disc Mill, this highly efficient grinding machine comprises a steel vessel containing a solid steel bar (stone) and one or two steel rings which oscillate with a rotary motion to grind materials from approximately 10mm lumps down to powders finer than 50 microns.
The Ball/Rod mills are meant for producing fine particle size reduction through attrition and compressive forces at the grain size level. They are the most effective laboratory mills for batch-wise, rapid grinding of medium-hard to very hard samples down to finest particle sizes.
MACSA Finger Crushers are of the double rotor type designed for breaking lumps of moderately hard materials, especially those tending to agglomerate in storage. Stainless Steel models are also available for food handling. Units can be supplied with hardened wear parts when crushing harder, abrasive materials.
The MACSALAB Drum Mixer has been developed to meet increasing demand for a low cost batch mixer for homogenising, dyeing, etc., particularly in smaller industries or for frequent product changes as required.
MACSALAB Cone Blenders are designed for gentle mixing of dry, powdered and granular materials, specifically where cones are loaded and discharged after mixing at various locations within the manufacturing plant.
Marcy Scalesare used toobtain the weight of sample in grams or kilograms, specific gravity of liquid or pulp, percentage solids contained in the pulp of any given specific gravity and specific gravity of dry solids.