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In recent, a friend left a message to consult the difference between trommel screener and vibratory separator asking how to choose. Both are widely used screening equipment, but the difference in working mode and principle also means the difference in yield and the type of material suitable for screening. This paper analyzes the difference between trommel screener and vibratory separator from the following 7 aspects.
01 Different screening methods
The trommel screener and vibratory separator belong to screening equipment when the two screening way is different.
The vibrating screen screens through vibration force generated by vibration motor, belonging to vibrating screen, commonly used mining vibrating screen consists of a circular vibrating screen and linear screen.
Drum screen is another form of screening. The equipment will not appear vibration in the screening process, but the general motor and reducer through the bearing to drive the roller rotation. Due to the rotation of the drum from high to low, the material in the drum goes through the screen and be successfully screened, which belongs to rolling screening.
02 The different shape and structure
The two are so different in appearance that it's easy to tell them apart.
A trommel screener is a cylinder, cylinder appearance with a layer or multiple layers, or several sections of the screen to increase screening specifications. The trommel screener’s volume is generally larger. The trommel screener is mainly composed of a motor, reducer, drum device, screen, frame, seal cover, inlet, and outlet. A steel ring must be added to the roller device to prevent the trommel screener from deformation.
The vibratory separator is mainly composed of a screen box, screen frame, screen, vibration motor, motor pedestal, damping spring, bracket, etc.
The equipment of linear vibrating screen is equipped with 2 vibration motors at the bottom, which can be divided into several layers.
Circular vibrating screen, also known as single shaft vibrating screen, its support mode has suspension support and seat support.
Drum screen and vibrating screen are generally composed of the prepared screen or punching screen, which size is generally 6mm-8mm.
03 Different working principles
Trommel screener
The roller device is tilted on the frame. The motor is connected with the drum device by a reducer through a coupling and drives the drum device to rotate around its axis.
Linear vibrating screen
Linear vibrating screen vibration motor excitation for vibration source, so that the material is thrown up on the screen, at the same time the material forward linear motion. Materials from the feeder evenly into the screen machine feed mouth, through the multi-layer screen to produce several specifications of the material. Materials are discharged separately from their respective outlets.
The screen surface of the circular vibrating screen is fixed on the screen box, the screen box is suspended or supported by a spring, and the bearing of the spindle is installed on the screen box, driven by the pulley and high-speed rotation. The eccentric counterweight plate is installed on the spindle and produces centrifugal inertia force with the rotation of the spindle, so that the vibration of the screen box forms an approximate circular trajectory.
04 Different classification
Trommel screener， according to the number of different mesh layers, can be divided into single, double and three layers of vibrating screen. This vibrating screen is similar, according to the number of screen surface layers，which can be divided into a single layer, a double layer, three layers, and four layers of a vibrating screen.
According to whether the drum screen motor is connected with the bearing, the drum screen can be divided into a shaft drum screen and shaftless drum screen.
05 Different output and applications
The Trommel screener has large output, long life, suitable for large production requirements.
Linear vibrating screen output is small, suitable for screening fine specifications of materials.
Circular vibrating screen output is large, suitable for large production lines.
Due to the different screening methods of the vibrating screen and the roller screen, they are good at screening different materials：
（1）For material containing larger stone, whose viscosity is larger, the use of the vibrating screen effect is better for the vibration of the vibrating screen.
(2) For dust, small particles of material screening is the weakness of the vibrating screen, so the use of roller screen screening effect will be better.
（3）For screening dry materials, we should choose to use the vibrating screen because the vibrating screen hole is not easy to block the hole, and the screening effect is better.
06 Different screening accuracy
Vibrating screen screening equipment is a vibration motor for vibration sources, so the screening accuracy is high. The roller screen is a high yield screening equipment, and screening accuracy is not as high as a vibrating screen.
07 Different plugging condition
For the roller screen, the material in the roller flip and roll, so that the material stuck in the screen can be ejected, to prevent the screen clogging. For the circular vibrating screen, the material on the screen surface is parabolic circular trajectory movement, so that the material as far as possible dispersed to improve the material bounce, and the material stuck in the screen can also jump out, reduce the phenomenon of hole blocking.
The trommel screener and vibratory separator respectively have their own working mode and screening principle, some raw materials can be screened through them, but different sites and different material requirements, should choose suitable screening machinery, in order to achieve good screening effect.
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