Samantha

The magnetic separator is used for removing the iron powder from the powdery materials. Magnetic separator is widely used in resource recovery, the timber industry, mining, ceramic, chemical, food and other workshops and it is suitable for the wet magnetic separation of the magnetite, pyrrhotite, roasted ore, ilmentie and other materials whose granularity is below 3mm as well as the deironing of coal, non-metallic minerals, building materials and other materials. It is the one of the model in the industry that is most widely used and versatile.
The ore beneficiation process is usually composed of by the magnetic separator and other mineral processing equipment. The quality of the products and accuracy of the magnetic separator is an important indicator to measure the magnetic separation. It is also the important indicator to measure the production of the entire beneficiation process. In order to improve concentrate taste, reduce the loss of the tailings and improve the utilization of tailings, the operator of magnetic separator should always pay attention to the process to adjust the magnetic separator equipment. In the production process of the magnetic separator, the operator should pay attention to the nature of the material, pulp density, pulp color, product quality and the changes of flushing water pressure. If any of the conditions changes, magnetic separator device is still in normal production in accordance with the normal operation rate, it will have the impact on the normal operations of the magnetic separator. Therefore, the operator of the magnetic separator should keep contact with the process from top to bottom to have a mature understanding of the whole production situation so that they can adjust the production process of the magnetic separator based on the nature of the materials and the changes of other conditions, adjust the feeding amount or flushing water pressure, the rotational speed of the magnetic drum of the magnetic separator to avoid waste of energy consumption and ensure the concentrate quality and high taste.

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With the in-depth development of the research work of the domestic and foreign high-performance permanent magnet materials, the industrialization of the magnetic separator and the constant optimization the upgrading and improvement of the magnetic system and the body structure of traditional permanent magnetic separator speed up the process that the permanent magnetic separation equipment gradually replace the electromagnetic magnetic separator. With the application of the automatic control and monitoring technology in the mining enterprises at home and abroad, the level of automation of mining equipment manufacturing is also correspondingly increased, which also brings increasingly high accuracy requirements in the magnetic field of mineral sorting. Currently, the development of the magnetic separator should follow the following trends:
Refinement of magnetic separation equipment
Taking into account the actual needs of the production of mineral magnetic separation for the mining enterprises, mineral processing equipment manufacturers expand the handling capacity of the equipment and pay more attention to the fine design of the magnetic separator equipment parts. In the design of the magnetic system, the more introductions of high-performance permanent magnet materials will help to optimize the structural design of the magnetic system and the adding of the auxiliary magnetic system can reduce magnetic flux leakage phenomenon to the maximum extent, improving the separation accuracy of the magnetic separator for minerals.
Proprietary of magnetic separation equipment
The constant expanding of the application range of the magnetic separator and the improvement of the degree of refinement of mineral separation make the magnetic separator widely used in various fields, expanding the application areas.
The renewal of magnetic separation equipment
With the development of social science and technology, the emergence of high-performance permanent magnetic materials, more sophisticated of the machining technology, the improvement of the assembly technology and the continuous improvement and promotion of the automation and control technology, the actual needs of the mine production accelerates the update of magnetic separation equipment.

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The magnetic system of wet magnetic separator is made of the high-quality ferrite material or the composite with rare earth magnets and the average magnetic flux density of the cylinder is 100 to 600mT. According to the needs of users, Hongxing Heavy Industry can provide a variety of types of magnetic separator such as the cocurrent type, countercurrent type and the semi-countercurrent. The magnetic separator has the advantages of simple structure, large processing capacity, easy to operate and easy to maintain and so on. The process has a special significance for energy saving, effective use of depleted iron ore and the improvement of the quality of the final iron concentrate.
Wet magnetic separator usually matches with other mineral processing equipment to form the ore beneficiation process. The quality of the finished products and the level of accuracy are the important indicators to measure the magnetic separation operation as well as the important production targets to measure the whole beneficiation process. In order to improve the grade of the concentrates, reduce the loss of concentrates and increase the recovery and utilization of tailings, the operators of the magnetic separator should always pay attention to the process adjustment such as the nature of the material to be sorted, pulp density, pulp color, product quality and the change of the flushing water pressure in the production process. If any of the conditions changes, but the magnetic separator device is still in opeation in accordance with the normal operational rate, which will have an impact on the normal operation of magnetic separator. Therefore, the operator of the magnetic separator should keep contact with that of other processes to achieve a comprehensive understanding of the whole production process so that the operator can adjust the production process of the magnetic separator according to the changes in the nature of the materials and other conditions, adjust the amount of feeding or the water pressure and regulate the rotational speed of the cylinder of magnetic separator to avoid the waste of energy consumption and guarantee the quality and taste of concentrate.

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Wet permanent magnetic separator is a kind of magnetic separators which are widely used in the iron ore processing plants. It applies to the sorting of ferromagnetic minerals. Wet permanent magnetic drum magnetic separator can be divided into three kinds in accordance with the structure of the tank: the cocurrent, counterflow, semi-counterflow. As for the three different kinds of wet permanent magnetic drum magnetic separators, they only differ from each other in the tank and selected size, but the other parts are the same as others. Their selected size is as followings:
① cocurrent tank: 6 to 0mm; ② countercurrent tank: 1.5 ~ 0mm; ③ The semi countercurrent tank: 0.5 ~ 0mm.
There are some matters needing attention about the installation and commissioning of the magnetic separator. The magnetic separator should be installed on a flat, sturdy foundation of concrete or steel and the stand bar should be kept stable and the force should be even. The operator should strive to avoid the rack deformation caused by the uneven foundation.
1. The first step is to clean up the debris in the transport and loading and unloading process, clean up the magnetic separator cylinder and tighten loose screws. When the magnetic separator is rotating, there should be no collision and noise.
2. The commissioning can be conducted if there is no abnormality after the magnetic separator is running for more than three hours.
3. When filling lubricants for the reducer, the amount should be in accordance with the oil window. As for the machine that works in the environment with the temperature from -5 to 35 Celsius, the change and adding of the lubricants should be based on the local environment.
4. It is necessary to conduct regular maintenance, lubricate the moving parts and fasten the screws.

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Many different types of magnetic separator are used at home and abroad and the classification way is also various.
1.According to the magnetic source, the magnetic separator can be divided into the permanent magnetic separator and electromagnetic separator.
2. Based on the strength of the magnetic field, the magnetic separator can be divided into the types as following:
(1) the magnetic separator with weak magnetic field, whose magnetic field strength of the magnetic pole surface is H0 = 72-136 kA / m and magnetic force HgradH = (2.5-5.0) 1011 Ann 2 / m 3;
(2) the magnetic separator with middle magnetic field, whose magnetic field strength of the magnetic pole surface is H0 of = 160-480 kA / m;
(3) the magnetic separator with strong magnetic field, whose magnetic field strength of the magnetic pole surface is H0 = 480-1600 kA / m and the magnetic force is HgradH = (1.5-6.0) 1013 Ann 2 / m 3;
3.According to the sorting process medium, the magnetic separator can be divided into the dry magnetic separator and wet magnetic separator;
4.According to the magnetic field, the magnetic separator can be divided into a constant magnetic field, a pulsating magnetic field and an alternating magnetic field magnetic separator;
The magnetic separator with weak magnetic field is mainly used for the selection of the strong magnetic minerals, such as magnetite, titanomagnetite, ferrosilicon.
In the traditional Industries, the electromagnetic magnetic system is relatively common and the body shape is drum type and belt type. Currently, the permanent magnetic system and cylindrical and wet magnetic separator are more widely used.
At home and abroad, they usually choose the dry magnetic separator whose sorting granularity is coarser in a strong magnetic field before to sort the non-ferrous metals and rare metals mineral.
Over the past decade, in order to select the weakly magnetic minerals whose grading taste is low, disseminated granularity is fine and mineral composition is complex, the experts have developed a variety of wet high intensity magnetic separator, such as ring type, cage type and disc type, but most of them are still in the experimental stage. The magnetic separator with secondary magnetic field is mainly used for the sorting of ferromagnetic ore with local oxidation.

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The magnetic separator is used for the removing of iron powder in the powdery mitochondrial. Magnetic separator is widely used in resource recovery, which is not only suitable for the wet magnetic separation of the materials whose granularity is less than 3mm such as the magnetite, pyrrhotite, roasted ore, ilmenite and other materials, but also used for the deironing of for coal, non-metallic minerals, building materials and other materials. It is one of the general-purpose mining machinery that is widely used in the industry.
1.The motor of the magnetic separator overheats and its sound is not normal.
Reasons: 1) bearing lubrication is poor or the bearing is badly worn; 2) fan falls off or the fan is worn; 3) switch circuit is in poor contact or disconnection or the single phase; 4) the voltage is too low.
2.The sound of magnetic Separator is abnormal in the operation process.
Reasons: the cylinder is stuck by obstacles so that the cylinder cannot rotate, which makes the bottom box vibrate. The reason for it is that the bottom case is stuck by the objects on the base or the magnetic blocks fall off, which causes the cylinder rattled. If it is serious, the drum skin will be pierced. At this time, the operator should shut down the magnetic separator for overhaul and troubleshooting.
3.The overheating of the reducer.
Reasons: 1) the oil is insufficient or the quality of the oil is poor; 2) gear and worm are worn seriously or the mesh between the gear and the worm is not good; 3) bearing lubrication is poor or the bearing is badly worn.
4.The magnetic field strength of the magnetic separator weakens.
Reasons: 1) the temperature is too high; 2) sun exposure is serious; 3) acid corrosion, which can be measured by the Gauss meter.

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The mineral that the magnetic separator can sort includes magnetite, limonite, hematite, manganese, siderite, ilmenite, wolframite, manganese ore, manganese carbonate ore, metallurgical manganese ore, manganese oxide, iron sands, kaolin and rare earth mine etc. The magnetic separation process is operated in the magnetic field of magnetic separator, with the help of magnetic force and the mechanical force on the role of the ore particles to achieve sorting. The ore particles with different magnetism moves along a different trajectory, sorting two or more separate products.
Wet permanent magnetic drum magnetic separator is a kind of magnetic separator widely used in the iron ore processing plant, which is suitable for the sorting of minerals with strong magnetism. In accordance with the tank structure type, magnetic separator can be divided into co-current, counter-flow, semi-counter flow. The selected size of these three kinds of magnetic separator is as follows: co-current tank ≤ 6mm, countercurrent tank ≤ 1.5mm and semi countercurrent tank ≤ 0.5mm.　
The processing capacity of the concurrent magnetic separator is large, which can not only be used for the rougher flotation and selection of the ferromagnetic materials with coarser granularity, but also is suitable for the concatenated work. When the feeding of concurrent magnetic separator is large, the magnetic mineral grains tend to lose in the tailings. Therefore, the operators should strengthen the operations management and control of the lower level of the pulp.

Counter-current magnetic separator is suitable for the roughing and scavenging of the fine-grained strong magnetic minerals. The recovery rate is higher, but a lower concentrate grade. Coarse material is easy to deposit to plug sorting space, thus the countercurrent magnetic separator is not suitable for the handling of coarse materials.　
Semi-current magnetic separator can not only obtain the high-quality iron ore concentrate, but also get a good recovery rate; therefore, the semi-current magnetic separator has been widely used in the production practice. It is suitable for the roughing and selection of the mineral whose particle is less than 0.5 mm and it can be used in series and parallel of several machines to achieve multiple scavenging and selection.

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In recent years, the high price of steel raw materials has brought significant profit for the iron concentrate from river sand. The professional ore beneficiation equipments such as iron concentrate ship and magnetic separator have been popularized and used in large area throughout the country. At the same time this cannot do without the help of magnetic separator.
The Magnetic Separator can separate raw materials with different magnetic rigidities. The machine works under the magnetic force and machine force.
There are a variety of magnetic separators, in a whole, that can be sorted into disk dry magnetic separator, flat ring magnetic separator, SHP wet magnetic separator and vertical wet magnetic sepatator.
Disk dry magnetic sepatator
This type machine is the main ore dressing equipment which is most commonly used for iron ore separation and manganese ore sepatation. Dry magnetic separator can be sorted into one tubular three rollers dry machine, two tubulars two rollers MS and tubular roller MS. DD is widely used in fine reselection of weak magnetic ore and of rare metal ore under 2-3mm particle size. It has three types, single disk(diameter is 900mm), double disks(φ=576mm) and triangle disks (φ=600mm). The magnetic induction can reached 880-1440 thousand Ann/m. Among them, the double-disk type is more widely used. The main body of magnetic separator is composed of electronic magnetic iron and rotatable pendulum induction disk, the two of which presents "W" shape. The disk turns upside down as a gear disk, whose diameter is half the width of belt conveyor. The disk drives by worm gear and worm reduction drive. We can adjust the polar distances between disc and the electromagnets (the adjusting range 0-20 mm) through handwheel. For fear of blocking, we installed a weak magnetic polar in tubular ore feeder to discharge the strong magnetic ore in advance.
Plat ring magnetic separator
Plat ring magnetic sepatator adopts ring chain to form a closed circulation, copper tube of coil to form a low voltage strong current, cold water to calm down tempreture and gear board as separation medium. Plat ring magnetic separator is composed of feeding device, concentrate ore and medium ore rinse device, separation middlings turn ring, magnetic department, answer the ore device, gearing and dc power supply. Novel as the structure is, magnetic department consists of concentric rings inside and outside magnetic strength, radial iron core and coil. The spindle is located in the center of the ring closed magnetic circuit and no magnetic lines through. The coil is made by the 22 × 15 × 2 mm square brass around and each of the outer core coil are 33 turns and the inner core coil 66 turns, which close to the pole. The coil cooling uses cold water, have features of good cooling effect, low cost and no noise.
SHP type wet high intensity magnetic separator
SHP wet high intensity magnetic separator is also known as double-disc intensity magnetic separator, which is in imitated from abroad Jones (JONES) based on magnetic machine information and many a trial.
Magnetic Separators are designed to recover ferromagnetic materials. The separators are available in designs and sizes to provide solutions for all applications. The heart of each separator is the magnetic system with its unique design, which has a proven record of high efficiency.
The Magnetic Separators are available in cyclic design with process vessel diameters smaller than 3mm. Magnetic Separator is one kind of efficient equipment for processing fine, feebly magnetic minerals, such as hematite, limonite, wolfram, ilmenite, and tantalum-niobium, etc. In recent years, it is also more and more applied in purifying quartz, feldspar and nephline. Its magnetic system is a ring-shape chain closed magnetic circuit with energizing coils made of copper tube and cooled internally by water. Grooved plates made of magnetic conductive stainless steel are used as magnetic matrix.

In recent years, the high price of steel raw materials has brought significant profit for the iron concentrate from river sand. The professional ore beneficiation equipments such as iron concentrate ship and magnetic separator have been popularized and used in large area throughout the country. At the same time this cannot do without the help of magnetic separator.
Magnetic separator is one of the most universal machine for construction industry, which is used for deironing in powder. Magnetic separator is widely used for resources recycling in wooden materials, mining industry, kiln, chemistry and food, etc. It applied to dry or wet magnetic separation with materials particle size under 3mm, such as magnetic iron ore, Magnetic pyrite mine, baking and titanium iron, coal, nonmetal ore and construction materials.
What is the working principle of the ore beneficiation? The answer is: it selects the iron through the special magnetic separator. The working principle and structure of the standard equipment iron concentrate ship can be simple summarized as the following: the boat consists floating body, chain bucket dredging system, screening system, magnetic separation system, tailing system, and power system. First of all our ore beneficiation equipment must float on the water, so we use the 3.5-4mm steel plate as the floating body. Depending on the dredging depth, the width and the length of the floating body has corresponding requirements. In general, the width is between 1.5-2m, the length is between 16-32m. In addition we should leave a certain distance usually 1.5m between the two floating body to increase the stability of the ship.
The feeding system of this set equipment is bucket dredging system. For the river sand has stones in different size, the sand must through the screening system in order to protect the magnetic separator.
The Magnetic Separator can separate raw materials with different magnetic rigidities. The machine works under the magnetic force and machine force.
Magnetic Separators are designed to recover ferromagnetic materials. The separators are available in designs and sizes to provide solutions for all applications. The heart of each separator is the magnetic system with its unique design, which has a proven record of high efficiency.
The Magnetic Separators are available in cyclic design with process vessel diameters smaller than 3mm. Magnetic Separator is one kind of efficient equipment for processing fine, feebly magnetic minerals, such as hematite, limonite, wolfram, ilmenite, and tantalum-niobium, etc. In recent years, it is also more and more applied in purifying quartz, feldspar and nephline. Its magnetic system is a ring-shape chain closed magnetic circuit with energizing coils made of copper tube and cooled internally by water. Grooved plates made of magnetic conductive stainless steel are used as magnetic matrix.
In order to achieve 90% net selection rate, the surface magnetic strength should be 3800-4500 Gauss, the specification should be 750*2200-2400. The iron content can achieve 98% after through the magnetic separation which can fully meet the customers' requirements.

With in-depth development of the domestic and foreign high-performance permanent magnet materials, the industrialization of magnetic separation equipment as well as the constant optimization, upgrade and promotion of traditional permanent magnetic separator magnetic system and body structure has accelerated the process that permanent magnetic separator equipment gradually take place of electromagnetic separation equipment. With the application of automatic control technology and monitoring technology in domestic and foreign mining enterprises, the automation level of mining equipment manufacturing is improved correspondingly and the accuracy requirements of the field of magnetic mineral separation is becoming higher and higher. Currently, the development tendency of magnetic separator mainly includes the following four trends:
The permanent-magnetic cylindrical type separator is widely used in the magnetite separation, recycling magnetic heavy medium, and the mine pre-selection of the wet type high-intensity magnetic separator and high gradient magnetic separator. This section mainly introduces the permanent-magnetic cylindrical type separator. The CTDG-1220N permanent magnetic chunk of ore separator is added by the driving device that is composed with the reducer and motor besides magnetic system, simplified style, rack, bearing, ore separation equipment, and magnetic system debug device. The main features and design principles are as followings.
The processing capacity of the CTDG-1220N bulk ore dry magnetic separator in up to 500t/h which is the permanent dry magnetic separator with he high processing capacity in China. In order to achieve this processing capacity, 2m wide belt should be used if the largest handling block is 75mm and the belt speed is enhanced to 2m/s. In this way, the thickness of the material on the belt is not more than 200mm to ensure the full load. Since the material is transported to the separator from a concave belt conveyor of 1.4m, serious accumulation of the ore will happen which will affect the sorting effect if active measures are not taken. Therefore, the design requirements that appropriate measures should be taken to ensure the uniformity of the fabric.