The role of polishing processing for vibrating screen

Under normal circumstances, If vibrating screen construction material is stainless steel, the equipment in the factory normally needs to be polished before delivery. Different surface processing will create different effects  on the stainless steel surface, such as food processing and pharmaceutical industry,the sanitation requirements are relatively high. In these applications, vibrating screen surface must be smooth, thus it is not easy to begrime, begrime will result in stainless steel surface becoming rust even corrosion, so the stainless steel vibrating screen must be polished inside and outside in these special industries.

In addition, some fine powder industries also need to be polished, after polishing, the vibrating screen body surface is not easy to tainted with fine powder, it’s easy to clean, also can screen other materials;For other common industries,you just need to polish the outside surface,it looks beautiful after polishing,and the surface  will not hurt the hands in the process of use.

Maize can not be sieved without vibrating screen

 Vibrating screen should be adopted in the beginning of the removal of impurities during the production of maize starch,in order to ensure a safe production of raw materials,so the removal of impurities is very necessary, maize raw materials contain a variety of impurities, dust, organic impurities, inorganic impurities. The general design will be 3 screen decks, the first deck screen surface with an aperturesize of 17-20mm hole, aimed to eliminate over sized impurity; second deck screen surface with an aperturesize of 12-15mm hole, used to remove impurities of medium size, third deck screen surface with an aperturesize of 2mm hole, used to remove minor impurities.

Advantages are high precision, large capacity, simple structure, low energy consumption, low noise, long service life, good sealing, no dust overflow in the screening process, and reduce the pollution of the dust, the screening efficiency is up to 98. It is very suitable for the screening and classification of powdery and granular materials, applicable to dry powder material chemical industry, food, medicine, metallurgy, plastics, glass, building materials, food, fertilizer, abrasives, ceramics etc.

 

What is the applicable range of flour vibrating screen ?

Flour vibrating screen is designed specifically aimed at sieving flour, potato starch, corn starch, wheat starch, cellulose, soybean, peanut protein, starch and other starchy materials and starch materials derivatives, it is suitable for sieving,impurity removal and loose material, etc., to adapt 24 hours of continuous production, processing capacity with large work requirements.

Flour vibrating screen commonly uses 20mesh, 24mesh, 30mesh, 40mesh, 60mesh. The use of vibrating screen mainly to remove lint, stone, bran, worm, nail and other impurities. The models are: 400, 600, 800, 1000, 1200, 1500, 1800, And material contact parts must SUS304 or 316L.

Principle of flour vibrating screen adopts motor as the vertical excitation source, and the motor is installed at both ends with eccentric weights, the rotary motion of the motor can be horizontal, vertical, inclined three types, then this movement is transferred to the screen surface. Adjusting the phase angle of the upper and lower ends  which can change the movement trajectory of the material on the screen surface.

How to solve copper powder blockage problem of rotary vibrating screen?

Change the way net-cleaning of the screen:

1, main Copper powder is constantly beating elastic balls prevent occlusion mesh material to reach NET-cleaning purposes. But in the process of using mesh blinding especially serious, indicating that this programme was not obvious, and bouncing the ball bouncing high and difficult to control, easy to create the screen damage.

2, using ultrasound instead of bouncing ball net cleaning device, its basic principle is: ultrasonic vibrating transducer with high frequency electric power generation through transformation in high frequency sinusoidal form of longitudinal oscillations, these oscillations are passed on to the resonator resonator resonance, then by the resonance vibration even transmitted to the screen. Keep the item on the screen remains in a suspended state, inhibits adhesion, friction, pancake and blocking network factors such as reunion, effective screening and net-cleaning purposes.

3, and regulation spin vibration screen heavy hammer angle: regulation heavy hammer of phase angle on can change screen online material of movement track and stay time, phase angle is less than 15 °, powder in screen online stay of time shortest, screening efficiency not high, only applies Yu General General screening; phase angle for 45 °, powder in screen surface Shang stay of time most long, for fine screening; Dang phase angle is greater than 45 °, powder run track tocenter closer, for special screening. Spherical solder powder not only screening accuracy is above 90%, oxygen content not exceeding 0.1 ‰, but also ensuring screening efficiency, so powder on the screen time is not too long and not too short, too short screening efficiency and accuracy are not up to, too much oxygen content.

Copper Ore Rotary Vibrating Screens ordered Congo Client are ready to dispatch

New delivery! This week,rotary vibrating screens designed for a joint longterm mining and mineral processing project which has recently commenced in DRC are ready to deliver to Congo.

The screens is used for copper ore with the total capacity of 10t/h,.PK Machinery engineers recommended 2 units XZS-1500-1 and 1 unit XZS-1500-2 which can reach the requirement well.

In addition,PK Machinery also supplies bucket elevator, screw conveyor, scraper conveyor,linear vibrating screen,circular vibrating screen, trommel screen, gyratory screen,etc.With years of engineering designing ,fabricating experience in this field and strong ability in projects,we are sure we will be the best choice!

Don't know how to disassembe rotary screener

Further information please click: www.pkmachinery.com

Difference between ultrasonic vibration sieve and ordinary rotary vibrating screen

Compared with rotary vibrating screen, ultrasonic vibration sieve is equipped with a ultrasonic generator, with self-cleaning function ,the mesh is not easy to block, it is no need to add bouncing balls and other anti blockage device. Ultrasonic vibrating screen is particularly suitable for screening fine powder and light weight material with mesh size larger than 300 mesh. 

Ultrasonic screening system is composed of ultrasonic resonant power supply, oscillator and resonance ring. The ultrasonic resonant powder supply will generate longitudinal oscillating wave which will transmit to the resonance ring to produce a resonance, and then the vibration will be transmitted to the screen mesh evenly through the resonance ring. While material on the screen mesh does three dimensional vibration movement in the low-frequency, it will overlap the ultrasonic vibration which can prevent the mesh plug and improve the screening yield and screening quality. 
The performance characteristics of ultrasonic vibrating screen: it can sieve the heavy, light, ultra-fine, strong adsorption powder (almost all of the powder is effective) that ordinary rotary vibrating screen can’t sieve. Compared with ordinary rotary vibrating screen, the material passing rate of ultrasonic vibrating screen will be increased by 50%-400%, the performance is as follows:
(1). Reduce screen mesh cleaning time;
(2). No pollution of powder that generated by bouncing ball and other auxiliary materials;
(3). Keep the screen mesh size, stable precision screening; 
(4). Reduce the material stuck on screen mesh size;
(5). Reduce screening frequency.

The Causes and Solutions of Rotary Vibrating Screen Mesh Blocking

Blocking reasons:

In normal operating conditions of rotaryvibrating screen due to various properties of the material and shape, it will produce a variety of different forms of blocking. The main blockage causes are as follows:

1. It contains a large number of particles close to the size of separation point;

2. High moisture content of materials;

3. Spherical particles or material has multiple points of contact with screen mesh;

4. Static electricity occurs;

5. The material has a fibrous characteristic;

6. Flaky grain contains more;

7. Due to the thick screen mesh holes or other shaped design is unreasonable, resulting in particles blocking phenomenon. Because most of the material particles is irregular, therefore, the reasons for the blocking is varied.

Solutions:

In order to effectively prevent blockage of the shaker screen, the following measures should be taken against the above sieve blockage causes:

1. When the material is fine-grained, clay content is more, and screen size is small, the moisture content on the screen blockage plays a decisive role;

2. When the material moisture content is greater than 5%, if there is no condition to dry the material, screen surface and screen mesh should be differential selected;

3.  When the water content is more than 8%, wet sieving should be used;
4.  If flaky grains contain more, we need to change the way the material crushing and granularity collocation of different crushing process.