trommel screen working

how a trommel screen works

People use screening equipment to separate different grades of material such as soil, gravel, mulch, and sand. These machines work great when they are working with dry material, even if bits and pieces are large in size. A notable weakness, however, is the difficulty that traditional screeners have with wet materials such as moist soil, wet sand, and compost. These substances tend to clump together when they are wet, which reduces the efficiency of the machine. In addition, moist material can clog up the machine and stick to the screen. This can be difficult to dislodge and will cost a lot of time. Fortunately, trommel screen sifters are available to make these tasks much simpler.

A trommel is a screen that is curved into a cylinder. The machine spins the cylindrical screen in order to sort through the material as it is fed through. During this process, the wet material tumbles around. Air is added and the soil, mulch, or sand becomes lighter and drier. The tumbling action also allows maximum contact time with the screen so that the fine material gets through quickly. A trommel screen can sort through dry substances quickly as well, even though it is designed with wet material specifically in mind.

These sifters come in different sizes, but in general they are portable enough to be moved by truck. This is very handy if you need to screen soil or mulch in more than one area of a homestead or if you need to move the machine to a different location entirely. Due to the materials that trommel screens specialize in, they are particularly popular with landscapers and excavating contractors. When things need to get done quickly, you cannot depend on your material being dry enough for a standard screening machine. Every handyman knows the importance of bringing the right tool for the job. The bigger the job, the more important the tool.

Cities can often find a lot of uses for screening machines. Trommel machines are particularly useful because they can handle a variety of tasks with speed. A quality screener pays for itself quickly when there are several tasks at hand. They are a beast that can take on a lot of work, but be sure not to overfill the machine. With a trommel, additional material beyond the designed capacity will only slow things down. The surface area of the screen is the limiting factor, so clogging the center of the rotary with more dirt or mulch will not accomplish anything. These machines are top notch quality, so it is important to remember that they should be allowed to work at their set pace. Even if there is a lot of labor to be done, the trommel will cut through it at a healthy speed, so let it run its course.

Like with many heavy duty machines, it is best to buy a trommel screen directly from a manufacturer. Far and away, this will get you the best price. By cutting out the middleman, you will also avoid all the overhead costs of a separate store and any salesman commissions. You pay the freight costs, but you would be indirectly paying for that anyway. The only issue with dealing directly with the manufacturer is that you need to do a bit of research. Luckily, the internet has made this issue all but disappear. Manufacturers that sell directly to customers have websites that explain the details of their products and provide informative videos and descriptions. By comparing different screeners and companies, you can find the highest quality machines at the best possible prices. If you are fairly good at performing online searches, the entire process will take less than an hour. If you need to sift and sort wet materials, purchasing a trommel machine straight from the manufacturer is the way to go.

I'm Al Skoropa and in 1996 I started EZ-Screen in Pontiac, Michigan to manufacture my first portable screening plant, the EZ-Screen 1000. Since then I've kept to my basic business philosophy of offering innovation, productivity, versatility and value through patented designs, exclusive features, quality manufacturing and outstanding customer service.

how trommel screen works | henan deya machinery co., ltd

Materials are sent into the drum by the hopper, they are lifted up by the rotation and aerated as they fall back down. This action is repeated with each revolution along the length of the drum. The finer materials pass through the screen openings while the larger materials tumble towards their eventual exit at the rear of the drum.

Trommel screen working principle: Materials are sent to the trommel screen drum and lifted up by the rotation and aerated as they fall back down. This action is repeated with each rotation along the length of the drum. The smaller material passes through the screen mesh while the larger material moves towards its exit at the rear of the drum. The trommel screen can be produce with one single screen mesh, two meshes, or three meshes according to the needs. There is cover outside to protect the equipment from dust.

trommel screen vs vibrating screen, which is better? - jxsc machine

In the mineral processing area, the trommel screens(aka. Rotary drum screens) and vibrating screens are both widely used screening & classification equipment. But whats the difference between the trommel screens and vibrating screens, and how to choose the most suitable screens for your mineral processing application? Or even how should we choose the right screening equipment for specific mining conditions?

Thorough we all may know that they are both are widely used screening equipment, but the different working methods and principles also mean the difference in output, as well as the types of materials suitable for screening processing.

Vibrating screens are screened using the exciting force generated by a vibrating motor and belong to vibrating screens. Commonly used mine vibrating screens include circular vibrating screens and linear screens.

The trommel screen is another screening form. During the screening process, the equipment will not vibrate, but generally, the motor and reducer drive the drum to rotate through the bearing. The material in the drum passes through the screen from high to low due to the rotation of the drum. And it is successfully screened out, so the trommel screen belongs to a type of rolling screening.

trommel screen: It is a cylinder. The outer surface of the cylinder uses one or more layers, or several sections of screens to increase the screening specifications. The volume of the trommel screen is generally large, mainly including motors, reducers, drum devices, screens, and machines. It is composed of a frame, a sealing cover, and an inlet and an outlet. A steel ring must be added to the drum device to prevent the trommel screen from deforming.

The roller device is installed on the frame obliquely. The motor is connected with the roller device through a coupling through a reducer, and drives the roller device to rotate around its axis. When the material enters the drum device, due to the tilt and rotation of the drum device, the material on the screen surface is turned and rolled. The qualified materials (products under the screen) are discharged through the outlet at the bottom of the rear end of the drum, and the unqualified materials (on the screen) The product is discharged through the discharge port at the end of the drum.

Using the vibration motor as the vibration source, the material is thrown up on the screen while moving forward in a straight line. The material enters the inlet of the screening machine evenly from the feeder, and produces several kinds of screens through the multi-layer screen. The upper and lower objects are discharged from their respective outlets.

The screen surface is fixed on the screen box, and the screen box is suspended or supported by springs. The bearing of the main shaft is installed on the screen box and is driven by the pulley to rotate at high speed. The eccentric counterweight plate is installed on the main shaft and generates centrifugal inertia force with the rotation of the main shaft, so that the screen box forms an approximate circular orbit vibration.

The trommel screen can be divided into single-layer, double-layer and three-layer vibrating screens according to the number of layers of the screen. This vibrating screen is also similar, according to the number of screen surface layers can be divided into single-layer, double-layer, three-layer and four-layer vibrating screen.

The vibrating screen is a screening equipment with a vibrating motor as the vibration source, so the screening accuracy is high. The trommel is a high-output screening equipment, and the screening accuracy is not as high as the vibrating screen.

For the trommel screen, the material is turned over and rolled in the drum, so that the material stuck in the sieve hole can be ejected to prevent the sieve hole from being blocked. For the circular vibrating screen, the material moves in a parabolic circular trajectory on the screen surface, so that the material is dispersed as much as possible to improve the materials bounce force, and the material stuck in the screen hole can also jump out, reducing the hole blocking phenomenon.

Vibrating screen and trommel screen have their own working methods and screening principles. Some raw materials can be screened through them. However, for different sites and different material requirements, suitable screening machines should be selected to achieve better screening results.

application and working principle of shaftless trommel screen | lzzg

The shaftless trommel screen drum unit is mounted on the frame at an angle and is designed without a central shaft structure. The motor drives the pinion gear to rotate with the large gear of the drum or the chain and the gear on the drum. The motor drives the chain drive or the roller is placed on the two rollers, and the motor drives the roller to drive. The roller device rotates under the driving of the driving device. After the material enters the roller device, due to the tilting and rotation of the roller device, the material on the screen surface is turned over and rolled, so that the qualified material (the product under the sieve) passes through the bottom of the rear end of the roller. The material is discharged, and the unqualified material (the product on the screen) is discharged through the discharge port at the tail of the drum. Due to the turning and rolling of the material in the drum, the material stuck in the screen hole can be ejected to prevent the screen hole from being clogged. Application of trommel screen The shaftless drum screen is mainly used for grading treatment of strip-shaped and entangled materials and is widely used in electric power, mining, metallurgy, building materials, chemical and other production industries. It is often used for the classification of refractory materials, coal, fertilizer, sand field stones, as well as the screening of sticky materials such as coal, coke, white ash, gold deposits, etc., to make the product structure more even to meet the production needs. Advantages Compared with the drum screen with the central shaft, the shaftless drum screen has a simpler structure. At the end of the drum screen close to the vibration motor, several steel bars are evenly welded around the drum, and the other end of the steel bar is gathered to the drum. On the central axis, after the fixing, the vibration motor is connected through the gear. When the vibration motor is started, the drum is also rotated, and the same screening principle as the roller screen of the shaft is used. The shaftless drum screen is relatively more material-saving, and the space for screening the material is larger. It is also easier to repair when the drum fails, so the use of the shaftless screen is also very much. For example, it can be used for pre-treatment of domestic garbage. It can filter out the required garbage. The advantage of no shaft is that it can avoid the entanglement of materials and the screening efficiency is relatively high.

The shaftless trommel screen drum unit is mounted on the frame at an angle and is designed without a central shaft structure. The motor drives the pinion gear to rotate with the large gear of the drum or the chain and the gear on the drum. The motor drives the chain drive or the roller is placed on the two rollers, and the motor drives the roller to drive. The roller device rotates under the driving of the driving device. After the material enters the roller device, due to the tilting and rotation of the roller device, the material on the screen surface is turned over and rolled, so that the qualified material (the product under the sieve) passes through the bottom of the rear end of the roller. The material is discharged, and the unqualified material (the product on the screen) is discharged through the discharge port at the tail of the drum. Due to the turning and rolling of the material in the drum, the material stuck in the screen hole can be ejected to prevent the screen hole from being clogged.

The shaftless drum screen is mainly used for grading treatment of strip-shaped and entangled materials and is widely used in electric power, mining, metallurgy, building materials, chemical and other production industries. It is often used for the classification of refractory materials, coal, fertilizer, sand field stones, as well as the screening of sticky materials such as coal, coke, white ash, gold deposits, etc., to make the product structure more even to meet the production needs.

Compared with the drum screen with the central shaft, the shaftless drum screen has a simpler structure. At the end of the drum screen close to the vibration motor, several steel bars are evenly welded around the drum, and the other end of the steel bar is gathered to the drum. On the central axis, after the fixing, the vibration motor is connected through the gear. When the vibration motor is started, the drum is also rotated, and the same screening principle as the roller screen of the shaft is used. The shaftless drum screen is relatively more material-saving, and the space for screening the material is larger. It is also easier to repair when the drum fails, so the use of the shaftless screen is also very much. For example, it can be used for pre-treatment of domestic garbage. It can filter out the required garbage. The advantage of no shaft is that it can avoid the entanglement of materials and the screening efficiency is relatively high.

The shaftless trommel screen is mainly used for grading treatment of belt-shaped and entangled materials. It is used for the classification of refractory materials, coal, fertilizer, sand field stones, and the selection of coal, coke, white ash, placer gold, and other viscous materials to make the product structure more uniform to meet the production needs. Shaftless trommel screens are relatively

At present, the screening tools are mainly divided into fixed screen, rotary screen, vibrating screen and swing screen. Which screener is suit for domestic waste separation? Domestic waste refers to solid waste generated in daily life or activities that provide services for urban daily life, as well as solid waste that is regarded as urban domestic waste by laws and

The gold washing trommel screen is very efficient in quickly screening large quantities of materials. In areas with high clay content, this sieve is also an essential gold mining tool. Gold, silver, lead zinc, tantalum-niobium, tin, and other rare and precious metal ores. Trommel screen structure The shaftless drum screen machine is mainly composed of motor, reducer, roller device, frame,

The shaftless trommel screen is suitable for sieving stone, sand, the garbage of various properties, and damp and easily clogged materials. The product under the sieve is 200mm, the middle is 20-40mm, and the thickness can be less than 5mm, with a self-cleaning device. The transmission mode is divided into three types: large and small gear transmission, sprocket chain transmission,

what is trommel screen and how does trommel screen work | m&c

Trommel screen, or rotary screen, is a kind of mechanical screening machine which is widely used in the separation operation. It controls the material separation by the particle size, and the separation precision is high. The cylinder of the trommel screen is generally divided into several sections, depending on the specific situation. The mesh holes are arranged from small to large, and the mesh hole diameter on each section is the same.

When the material enters the drum screen, due to the inclination and rotation of the roller device, the material on the screen surface will turn over and roll, so that the qualified material will be discharged through the outlet at the bottom of the drum, and the unqualified material will be discharged through the outlet at the end of drum.

1. It is used for sand screening in sand plant; 2. Used as sand screening machine to screen sand and stone; 3. Used as gold washing equipment for screening and cleaning sand, stone and gold; 4. Used for screening mineral materials in gold boat.