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magnetic separators construction and working principle

working principle of dry magnetic separator - news - foshan powtech technology company limited

working principle of dry magnetic separator - news - foshan powtech technology company limited

The dry magnetic separator can be divided into strong magnetic field magnetic separator and weak magnetic separator according to the strength of magnetic field. The reason why the magnetic intensity is different mainly because of the different magnetic sources, the magnetic separator is mainly used in the ore dressing production. It is the key to separate the magnetic mineral from the non magnetic mineral and the magnetic difference mineral in the magnetic separation process. Ore dressing equipment.

In order to understand the magnetic separator, we should understand the magnetic separation process first. The magnetic separation is based on the magnetic difference of the different components in the separated material. In the working magnetic field produced by the magnetic separator, the process of separating the different materials by the different particles is different from the magnetic field force and other forces.

After the ore pulp flows into the tank through the ore feeding box, the ore particles are loose and enter the mining area of the trough. In the action of the magnetic field, magnetic particles are magnetically gathered to form a "magnetic mass" or "magnetic chain". "Magnetic mass" or "magnetic chain" is subjected to magnetic action in the pulp, moving toward the magnetic pole and adsorbed on the cylinder.

Because the polarity of the magnetic pole is alternately arranged along the rotation direction of the cylinder and is fixed at work, the magnetic agitation occurs when the magnetic pole alternates with the cylinder when rotating with the cylinder, and the non magnetic minerals such as the gangue in the "magnetic mass" or the "magnetic chain" fall off in the turn, and are finally broken down. The "magnetic mass" or "magnetic chain" on the surface of the cylinder is the concentrate. The concentrate is transferred with the cylinder to the weakest magnetic force at the edge of the magnetic system. It is unloaded into the concentrate trough under the action of the flushing flow from the discharge pipe. If it is a full magnetic magnetic roll, the unloading is carried out by the brush roll. The non magnetic or weakly magnetic minerals are left in the pulp with the pulp drained out, that is, the tailings.

magnetic separator|magnetic drum separator|wet magnetic separator|magnetic separator machine - henan fote machinery co., ltd

magnetic separator|magnetic drum separator|wet magnetic separator|magnetic separator machine - henan fote machinery co., ltd

After the ore pulp flows to the magnetic groove via the feeding box, the mineral particles in the loose status enter the feeding zone driven by the current of the feeding spray pipe. In the magnetic separator, the magnetic particles gather together to form a magnetic group or magnetic chain which moves toward the magnetic pole in the pulps magnetism effect and is absorbed to the cylinder. As the polarity of the magnetic poles is arranged alternately along the cylinder rotating direction and is unchangeable during the operation, the magnetic group or the chain rotating with the cylinder will mix with each other because of the alternate magnetic pole. Non-magnetic materials like the gangue mixed in the magnetic group or chain will split away during the rotation and be absorbed to the cylinder surface, thus producing the concentrate. The concentrate turns to the weakest position of the magnetic system edge and then is washed away to the concentrate groove by the water sprayed form the ore unloading pipe. If the magnetic roll is the complete magnetic one, we will use the brush roll to unload the minerals.

The magnetic drum separator or the wet magnetic separator machine is used to remove the iron powder form the particle and powder materials and to recycle resources in the industries of wood, mine, ceramics, chemical and food. Magnetic drum separator can not only complete the wet magnetic separation of materials with the particle size smaller than 3mm such as magnetite, pyrrhotite, roasted ore and ilmenite etc, but also remove iron from the coal, non-metal and construction materials. So magnetic drum separator is the wet magnetic separator machine with the highest universality and the widest application range.

Zhengzhou Fote is a professional wet magnetic separator manufacturer which makes the magnetic separator, strong magnetic separator, wet and dry separating equipment, iron ore and permanent magnet cylinder separator. Fote has many years experience of making magnetic separators and we have strong technical advantages and production strength. The company with the strong strength and advanced technology is a well known manufacturer with customers trust and support.

Model Shell diameter mm Shell lenght mm Shell rotation speedr/min Feeding size mm) Processing capacoty t/h Powerkw CTB6012 600 1200 <35 2-0 10-20 1.5 CTB6018 600 1800 <35 2-0 15-30 2.2 CTB7518 750 1800 <35 2-0 20-45 2.2 CTB9018 900 1800 <35 3-0 40-60 3 CTB9021 900 2100 <35 3-0 45-60 3 CTB9024 900 2400 <28 3-0 45-70 4 CTB1018 1050 1800 <20 3-0 50-75 5.5 CTB1021 1050 2100 <20 3-0 50-100 5.5 CTB1024 1050 2400 <20 3-0 60-120 5.5 CTB1218 1200 1800 <18 3-0 80-140 5.5 CTB1224 1200 2400 <18 3-0 85-180 7.5 CTB1230 1200 3000 <18 3-0 100-180 7.5 CTB1530 1500 3000 <14 3-0 170-280 11 Model Feeding size mm Processing capacity t/h CTB6012 2-0 10-20 CTB6018 2-0 15-30 CTB7518 2-0 20-45 CTB9018 3-0 40-60 CTB9021 3-0 45-60 CTB9024 3-0 45-70 CTB1018 3-0 50-75 CTB1021 3-0 50-100 CTB1024 3-0 60-120 CTB1218 3-0 80-140 CTB1224 3-0 85-180 CTB1230 3-0 100-180 CTB1530 3-0 170-280

Through long-term arduous technology research and international communication, our product quality has been in line with international level, winning a world-wide acclaim and honor, and our products are exported to ninety countries and regions like Tanzania, Nigeria, South Africa, Kenya, Turkey, Saudi Arabia, Philippines, Indonesia, Malaysia, Vietnam, Mexico, Brazil, Russia, Uzbekistan, Australia, etc.

working principle of inline magnetic separator - article watt

working principle of inline magnetic separator - article watt

It is common knowledge that over time a lot of debris and rust can end up building in the pipes of your central heating system. This can lead to a lot of bigger issues further down the road right from the inefficiency of the heating system to constant boiler breakdowns. If you intend to prevent such issues from happening then you might want to consider using magnetic filters in your central heating system.

You might be wondering what exactly are these magnetic filters are being talked about, how do they function, and just why are they important? Continue reading further to know everything there is to know about magnetic filters.

Magnetic filters are designed to catch the sludge in the central heating system and hence prevent the various issues associated with the formation of sludge. Just like the name implies, a magnetic filter in Ireland is magnetic which means that it will be very effective in attracting and removing the corroded iron and steel material within the sludge.

One of the best ways of using the magnetic filter is by fixing it to the pipe that returns the water to the boiler after the water has traveled around the central heating system. Amagnetic filter Irelandis added to the boiler mostly right at the time of the installation of the boiler. Sometimes it can be possible to fit the magnetic filter Ireland onto existing systems but this might not always be possible given the location of the boiler.

If you happen to be quite unsure if theres enough space near the boiler to add a magnetic filter Ireland to the return pipe, then it would be in your best possible interests to go ahead and contact an engineer of central heating systems at the earliest.

Yes. If you plan to use a magnetic filter, then yes, you will need to clean it regularly. This is because the sludge that the magnetic filer is cleaning needs to be removed from the filter itself now and then. You can engage the services of a central heating engineer for getting the magnetic filter cleaned during the annual service of your boiler.

If you dont have a magnetic filter for preventing a build-up of contaminants then times are not far when your entire system would be in the need of a power flush. You might need to engage the services of an engineer to carry out a power flush and the same can take anywhere between 6-10 hours. If you happen to be particularly unlucky, then you might end up with a system that is so damaged that it needs to be replaced altogether.

When people choose to get a new boiler installed they usually do it in the hopes that the boiler will easily provide them with heating and hot water for many years to come. This is where you might avail a lot of benefits by using a magnetic filter.

Over time, it is only but inevitable that sludge and dirt will begin building in the pipes of the boiler and this might make your boiler a lot more inefficient so the result will be higher energy bills. Thus it makes sense for you to begin using a magnetic filter that can catch all the dirt and debris before the water gest prevented from flowing through the system.

magnetic separation - sbm mining and construction machinery

magnetic separation - sbm mining and construction machinery

Magnetic separation is an industry process in which magnetically susceptible materials with different magnetic rigidities are extracted or separated from a mixture by using different magnetic forces. Generally speaking, magnetic separation is particularly suitable for separating weakly magnetic minerals or strongly magnetic minerals, or for de-ironing.

The magnetic separator consists of a large rotating drum, in which permanent magnets are wrapped and fixed, so it creates a magnetic field. When materials enter the feeding cell, sensitive particles will respond to the magnetism and stick to the drum. As the drum rotates, the magnetism will become weaker and weaker. With the washing or cleaning forces, sensitive particles will fall down and be collected into the concentrate hoppers. As for non-magnetic particles, they will be flowed out from the discharging opening.

Magnetic separation is an important process in the beneficiation of iron ores, and finds application in the treatment of paramagnetic non-ferrous minerals and in the processing of non-metallic minerals. Technically speaking, low-intensity magnetic separators can be used to concentrate ferromagnetic minerals such as magnetite (Fe3O4), while high-intensity separators are used to separate paramagnetic minerals from their gangue. Whats more, magnetic separators can remove unwanted magnetic minerals from non-ferrous minerals.

According to magnetic intensities, magnetic separators can be classified into three kinds: low-intensity magnetic separators (900-1700Gauss), middle-intensity magnetic separators (2000-6000Gauss), high-intensity magnetic separators (6000-20000Gauss).

cyclone separator working principle (dust separator) explained - savree

cyclone separator working principle (dust separator) explained - savree

Cyclonic separation is a means of separating different liquid phases (different liquid densities), or, separating particles from a gas stream. Cyclone separators often form part of a pre-cleaning stage prior to a gas or liquid being discharged. This article focuses on the gas cyclone separator.

A cyclone separator has several colloquial names. These names include dust separator, dust collector, dust extractor, cyclone extractor and cyclone separator. Generally, smaller units are referred to as dust separators or extractors, whilst large scale industrial separators are referred to as cyclone separators.

This article will focus on the reverse flow gas cyclone separator because this type of separator is the most common in use today. We will refer to the term collection efficiency, or simply efficiency throughout the article. The collection efficiency -also known as the capture or recovery rate- is a measurement of a cyclones ability to separate particles from the flowing gas stream. Because particles have different sizes, the efficiency rating is usually given for varying particle sizes.

The volumetric flow rate and geometry of the cyclone separator define the cut point. The cut point is the point at which particles are removed from the gas stream at 50% efficiency. This measurement is an industry standard measurement and can usually be obtained from the original equipment manufacturer (OEM).

Un-treated gas enters tangentially through the inlet at the side of the separator. Entrained particles within the gas stream are separated from the gas stream and discharged through the reject port at the base of the separator. Cleaned gas exits through the accept port at the top of the separator.

Gas containing entrained particles enters at high velocity through the tangential inlet at the top of the cyclone. The gas flows into the cyclone body/barrel at a tangent and begins to flow in a circular downward spiral towards the lower reject port; this downward flowing spiral is referred to as a spiral vortex.

The cone diameter gradually decreases which causes the gas velocity to increase. The outer vortex creates an additional inner vortex closer to the centre of the separator body and this inner vortex flows spirally upwards towards the accept port.

Particles with more inertia will impact with the side of the cyclone whilst particles with lower inertia will remain within the gas stream. Inertia can be thought of as a particles ability to continue travelling in a straight line even when external forces are applied. When an external force is applied -such as by the cyclonic vortex- the particles with low inertia will not continue to travel in a straight line, they will instead travel spirally as they are swept along by the gas stream.

Particles with greater inertia will be less affected by the vortex and will continue travelling in a straight line. This straight-line trajectory causes the high inertia particles to move out of the gas stream and impact with the cyclone separator body. These particles then fall to the base of the cyclone separator and out of the reject port. In this way, entrained particles of a certain size can be separated from the gas stream.

Another way to think of this process, is to think of higher density particles colliding with the cyclone body whilst less denser particles are retained within the gas stream. This is not strictly true though as both the density and shape of the particle will affect its ability to be separated from the gas stream.

It is a common misconception that centrifugal force is the force that separates the particles from the gas stream, but it is centripetal force that causes the particles to collide with the separator body.

Centripetal forces generated within the separator may be anywhere between five times gravity for large diameter low pressure drop separators, to 2,500 times gravity for very small diameter high pressure drop separators.

There are several factors that can affect a cyclone separators efficiency. These include particle density, particle size, volumetric flow rate, pressure drop, cone length, body length, ratio of accept port to body diameter, and even the smoothness of the cyclones internal surfaces. We will now discuss the more important design aspects in greater detail.

Particle density is one of the most deciding factors affecting a cyclones ability to remove entrained particles. Dense particulates such as ferrous oxides can be separated with a 99% or greater efficiency, irrespective of particle size. When the particle density decreases, the efficiency decreases (assuming no other system changes occur).

Particle size is a large design consideration effecting a separators efficiency. Larger particles can be more easily separated than smaller particles. Particles smaller than five microns are difficult to separate without using very small separators. Particle exceeding 200 microns can often be separated using other means such as gravity-settling chambers. A reduction in particle size will give a corresponding reduction in efficiency.

A separators geometry greatly impacts the efficiency of the unit. A larger diameter cyclone separator will not be able to separate particles as efficiently as a smaller diameter separator. The efficiency of the separator increases as the cone diameter decreases. Thus, reducing the cone diameter enables the removal of finer and finer particles. A small diameter cone will extract much finer particles from a gas stream than a larger diameter cone.

All cyclone separators have an associated pressure drop. The pressure drop can be thought of as the amount of energy required to move the gas through the separator, alternatively, it can be thought of as the amount of resistance the cyclone separator adds to the system flow. The pressure drop is a product of the gas flow rate, gas density and cyclone geometry. Pressure drop can be expressed as:

Another way to increase a separators efficiency is to reduce the accept port diameter. This changes the separator body to accept port diameter ratio and has the effect of only allowing finer particles to leave the separator through the accept port.

Small cyclone separators have a higher efficiency rating, but the associated pressure drop is high and the volumetric flow rate is low. Gas velocity through small separators is also very high and this will lead to a high level of erosion if the gas stream contains abrasive particles.

Large cyclone separators have a lower efficiency rating, but the associated pressure drop is low and the volumetric flow rate high. A large diameter separator is not suitable for removing fine particles from a gas stream.

Some disadvantages are associated with cyclone separators, but these disadvantages can be reduced in severity if the correct separator is selected for the correct application. Disadvantages may include:

Material selection is a very important consideration when choosing a separator for a specific application. Some process systems may contain erosive or corrosive flowing mediums, so it is necessary to add a protection layer to the cyclones internal surfaces.

Suitable materials for protecting the separator within erosive systems might include materials such as ceramic or some form of enamel. Separators operating within corrosive systems may have some form of enamel or poly-based material coating to protect the cyclone metal body beneath.

A typical application would include a saw mill. Saw mills generate a lot of dust which must be extracted from the mill. Dust is drawn into the main extraction system by a negative pressure created by a fan -usually a centrifugal fan-. The dust laden air then passes through a cyclone separator where most of the wood dust is separated from the air stream; the clean air is then discharged directly to ambient air whilst the wood dust is recycled or disposed of.

Another common application is the household vacuum cleaner. An electric motor drives a fan which draws air and particles into the vacuum cleaner body. There are few parts to maintain and the vacuum has the added advantage of having no bags that need to be replaced. James Dyson made himself a billionaire when he invented the first cyclone separator vacuum cleaner after seeing a working cyclone in a wood mill.

magnetic flow meter: working principle instrumentation application

magnetic flow meter: working principle instrumentation application

Two electrodes that can pick up electrical voltages are installed at right angles. The lining which is fitted inside the wall prevents an electrical short circuit between conductive fluid and the metal body.

If there is no liquid flow, no induced voltages are measured between the electrodes, and electrically charged particles are evenly distributed. As soon as the flow starts inside the tube, the magnetic field applies a force to the charged particles. the positively charged particles are separated get collected on the opposite sides of the flow tube. The electric voltage is formed which is detected by the two electrodes.

The electric voltages depend on the flow velocity inside the tube. Together with the tube cross-section, flow volume can be calculated. Greater the flow velocity, the greater the separation of charged particles.

Liners: Ceramic, neoprene, Polyurethane, Rubber, Teflon, Vitreous Ceramic kynar. Electrodes: Platinum, Hastelloy C, Stainless Steel, Tantalum, Tungsten carbide, Monel, Nickel.

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