How much knowledge do you know about belt conveyor magnetic separator?

When customers purchase belt conveyor, they only provide conveying material name, but seldom mention whether the material contains other impurities or not.For example, if long and big iron contained in the material, it will be easy to scratch the conveyor belt, so magnetic separator plays an important role.In this article,we will introduce the magnetic separator as follows:
Magnetic separator is applicable to various fields deironing, which can realize continuous iron absorption and removal.
Please pay attention to the conveyor belt, bandwidth, dip angle, material properties, moisture, material thickness an iron content percentage, the nature of the magnetic material, as well as the deironing requirements and the environment condition to select a suitable magnetic separator.
Magnetic separator can remove the ferromagnetic impurities which are mixed in material, to ensure the safe and normal transmission system work of the crusher, grinding machine and other mechanical equipment,at the same time it can effectively prevent belt scratch caused by the large, long iron besides,the grade of raw materials can be significantly improved.

What Application of Sidewall Belt Conveyor in Thermal Power Plant?

1.Requirements for Belt Conveyor
Sidewall belt conveyor is the main equipment to transport coal and lime-ash in thermal power plant. Therefore it has the high security requirements. In general, the whole transit line is equipped with twin channel sidewall belt conveyor, one is put into use, another is as standby application device. Thus, this coal handling system must be equipped with sidewall belt conveyor with 2500m-3000m length. Applying sidewall belt conveyor to thermal powder plant, it can not only simplify procedure, but also save cost.
2.Features of Belt Conveyor in Power Plant
Due to power plant has high requirements for the security of equipment, technical requirements of sidewall belt conveyor are as follows:
1) It has different requirements for belt conveyor when it used to receive, convey or discharge materials. For instance, if the belt conveyor is used to receive materials, the belt speed of it shouldn’t be too high. If it is used to convey materials, it requires that trough angle of idler decrease properly. If plow discharger is put into use, the cover rubber of belt surface should be thicken properly. 
2)The belt speed should be low. Belt conveyor is mostly arranged in workshop, so it has high requirements for coal dust control. According to domestic and foreign practical experience, it’s better to adopt lower speed.
3)After installation of this machine, it seldom changes its layout.
4)Different coal type has different requirements for belt conveyor. For example, large coal particle size needs impact idler with high quality. Coal with less water and more dust needs guide chute with good sealing. 

sidewall belt conveyor

Reasons of Drifting of Belt Conveyor

As one of the most common conveyors, belt conveyor is widely used in metallurgy, chemical, electricity, coal, mining, port, transportation and so on. In operation of belt conveyor, there is much drifting of the machine. The following is reasons of the phenomenon.

1. There is coal or other attachments in the surface of pulley or idler.

2. There is mistake in the degree of net post manufacture of driving pulley and bend pulley.

3. Driving pulley and bend pulley are not parallel.

4. Diameters of driving pulley and bend pulley are inconsistent.

5. Center line of driving pulley and bend pulley is not vertical with center line of machine body.

6. Feeding position is inappropriate.

7. Center of pulley is not in the center line of the machine.

8. Installation of idler is inappropriate.

9. Stiffness of frame is bad which causes the deformation of the machine.

10. Joint of belt conveyor is inappropriate or the belt conveyor is aging and deterioration.

11. Rotation of unilateral bearing is not flexible.

12. The damage of ware of the two side of driving pulley are inconsistent.

13. The adjusting device is damaged.

14. Girdle pulley in head and bend pulley are not parallel.

15. Center lines in both sides of belt conveyor are not consistent, or the margin of belt is heavily damaged.

16. Installation of feeder, unloader and sweeper is inappropriate.

17. Degrees of ware of two sides of coal unloading pulley are inconsistent.

18. Take-up tension of belt conveyor is not enough.

19. Feeding direction and height arrangement are inappropriate.

20. Support of idler is heavily damaged.

What Should We Note During the Installation of Large Angle Belt Conveyor

Large angle belt conveyor can be transported with large inclination , it even can be vertical. It adopts sidewall belt as the main part. The advantages are: large conveying amount, small space occupation ,small noise etc. which is widely used for conveying powder, blocked material. Here PK Machinery will introduce the installation notes during installation:
1.Check whether the components of large angle belt conveyor are complete or not
Generally speaking, belt conveyor includes lots of components: head & tail frame, concave & convex segmental arc frame and middle frame, however, the quantity of trough roller frame, rollers and sealing cover is big, you need to check carefully and guarantee the components are transported to the right place.
2.Installation, positioning and welding of head and tail frame, concave and convex segmental arc frame
First of all, please find the center line of the belt conveyor by using a steel wire. When installation, please make the head & tail frame, concave & convex segmental arc frame subject to the center line.

 

3.Check belt running and adjust the belt if it runs off tracking
After installation of belt, trough roller, self-aligning roller and vertical roller, connect the power supply , run the belt and adjust the belt offset distance .
4.Installation of large dip Angle belt conveyor accessories and bolts
After adjusting the belt, you can start to install the sealing cover, head cover and fastening bolts.

Three Horizontal Sections of Large Angle Belt Conveyor

Large angle belt conveyor is suitable for the unit mass of 500 ~ 2500 kg/m3 and the material large size of about 100 ~ 250 mm, the features of large angle belt conveyor are: simple structure, convenient maintenance, space saving and investment saving. Here PK Machinery will explain and introduce three kinds of horizontal section:
1. Upper horizontal section
In order to adapt to the requirement of different discharge height, the head frame is divided into low type frame (head frame height = 1000 mm), middle type head frame (head frame height = 1100 ~ 1100 mm) and high type head frame (head frame height = 1600 ~ 1600 mm).
Correspondingly, low type convex segmental arc frame and low type middle frame support (matched head height = 1000 mm), middle type convex segment frame and middle type frame support (matched head frame height = 1100 ~ 1500 mm), high type convex segment frame and high type middle frame support (matched head frame height = 1600 ~ 1600 mm) will match with upper horizontal section respectively
2. Lower horizontal section
The lower horizontal section adopts low type middle frame support.
3. Inclined section
The inclined section of large angle belt conveyor adopts low type middle frame support. When the conveyor inclined angle β ≧ 45 °, we suggest adopting Ⅱseries low type middle support.

The connection of upper horizontal section and inclined adopts the convex arc segments frame , and the lower horizontal section and inclined section adopt concave segmental arc frame to connect so as to realize the smooth conveyor belt transition.

The introduction and application of tension device

 Belt conveyor is a transport machine that is driven by friction and it can transport materials continuously. Belt conveyor needs tension force in order to ensure the normal and stable operation of conveyor and meet the friction driving force between the driving drum and the belt. It is very important to choose the proper tension device when we design the belt conveyor.

Functions

1.Tension device can make the belt conveyor have enough initial tension force so that can ensure the necessary friction between belt and driving drum.It also can reserve friction to meet the requirements of friction drive of transmission drum.

2.Tension device can ensure the tension force of minimum tension point in order to satisfy the pendulous restriction conditions of conveying belt so that can make sure of the normal running of conveyor.

3.To provide the necessary route for conveyor belt joint.

Detailed rules and regulations of operational approaches

      When we turn off belt conveyor, the stored energy of conveying belt will release rapidly; and then it will damage its mechanical components and conveying belt itself, especially in the dip angle of belt conveyor and the tension device. When the belt conveyor brakes suddenly, the speed of driving drum will decrease rapidly and the linear displacement will less than the displacement of upstream drum. This characteristics will decrease the mechanical stress of upstream conveying belt and the deformation of belt will smaller, while the mechanical stress of downstream conveying belt will increase as well as deformation. That is to say,when the speed of transmission drum suddenly reduces, the returning conveying belt under the transmission drum caused by the mechanical stress of belt will be strained while returning conveying belt and upward conveying belt below the transmission drum will be relaxed because of the inertia of mechanical equipment. Thus, tension device of conveying belt should pay much attention to its deformation and brake the displacement of upstream position.