What Factors that Affect the Screw Conveyor Conveying Efficiency ?

The factors are listed as follows:
1.The material has great viscosity and is easy to agglomerate. 
The viscous material is easy to stick on the screw blade and the inner wall of the screw conveyor, which will increase the resistance in the process of conveying, and directly affect the production efficiency.
2.The diameter size of the screw pipe.
Under the same conditions, conveying efficiency of the screw conveyor with larger diameter is higher than the conveyor with small diameter.

3.The dip angle and transportation distance of screw conveyor.
4.The particle size, temperature, moisture, abrasion and corrosion of the material.
Specific parameters can refer to: Screw conveyors and conveying technical parameters calculation formulas.
5.The rotate speed of the screw conveyor.
The rotating speed of the screw conveyor is related to the power of conveyor motor . The working speed of screw conveyor has a close relationship with the material characteristics. High speed screw conveyor requires strict assembly, and demands a better balance. 
Further information,please click:www.pkmachinery.com

How to Adjust the Excitation Force of Vibration Feeder?

Due to the errors of previous parameters that clients offer and the material granularity and processing capacity per hour of actual production, clients can adjust the motor excitation force according to the following description in order to change the capacity vibration feeder.
The shaft for each end of vibration motor has a fixed eccentric block and an adjustable eccentric block, you can adjust excitation force by adjusting the angle between fixed eccentric block and adjustable eccentric block according to the needs,see table 1 and table 2.

Table1:

Table 2:

Adjustable eccentric block rotation angle	0°	60°	90°	120°
excited force	F	0.866F	0.707F	0.5F

Please switch off the power before adjusting the excitation force of the vibration motor. Remember, when adjusting the excitation force, the two vibration motor eccentric block position should stay the same , in case of imbalance phenomenon,and causing damage to vibration feeder. So generally it needs 10 mins to adjust the excitation force, after that you can switch on the vibration motor and adjust the eccentric block angle.

Reason Analysis for Rubber Falling Off the Belt Conveyor Pulley

Rubber falling off the pulley is one of the common trouble of belt conveyor,after many years of practice and analysis, the reasons are as following:
1.The wrapping angle between pulley and belt is too small.
Peripheral force of driving pulley is transmitted to belt by friction.In running,in order to avoid slipping between pulley and belt,the belt tension is not allowed too big.According to Euler’s Formula,if the wrapping angle is smaller,the belt tension will be bigger,so it’s easy to slip.Slipping will speed up the wear of pulley.
2.Water or wet material stick on the belt surface.
When transporting material contents dust,like coal,ore and so on ,we usually use water spray to remove dust,thus water will be mixed with material and stick on belt surface,besides,rain will also lead water sticking on belt, once water sticks on belt surface,the friction coefficient between belt and pulley will decline which will cause slipping between belt and pulley,and speed up the wear of pulley.

3.The tension is too small.
Tension device is very important to conveyor pulley,if the tension is too small,it will lead to slip,causing wear of pulley,when the tension distance is not enough and the belt with permanent deformation,we can cut a segment of belt,then vulcanize again.
4.The failure of cleanser.
The failure of cleanser can result in the adhesive materials entering into belt and pulley,causing wear between belt and pulley, thus the rubber cover will fall off the pulley,and reduce the service life of belt.
5.Belt conveyor material scattering .
Belt conveyor material scattering is a common problem,when the material scatter during machine running,a portion of material will enter into belt and pulley,which will cause the wear of rubber surface and belt.

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!

How to Select the Driven Device for Linear Vibrating Screen ?

Linear vibrating screen can achieve dry and wet screening,and also can achieve automation work on the working site. Here PK Machinery will talk about the driven device selection for linear vibrating screen.
With regard to the material like ceramic, food, etc with small density,capacity and vibrating screen model, generally the screen surface length is <3000mm, screen surface width is <1200mm, and the weight of the vibrating screen is relative light, under such circumstances, the driven device of 2 sets vibrating motors rotate oppositely at the same time will be adopted. Motor installation on the bottom, upside or both sides of the screen equipment can be optional.

While the material like coal, mineral, building material, etc with large density, capacity and the required vibrating screen model, generally the screening surface length is >3600mm, screen surface width is >1500mm, and the weight is heavy. Under such circumstances, the driven device of 2 sets motors drive 2 sets vibrating exciter will be adopted. Vibrating exciters will rotate in different directions which can be installed on the bottom or the upside, then produce vibrating exciting force to achieve screening. 
If the working site’s installation space is limited, or there are some special requirements, we could optimize the design.  

Exponor Chile 2015,PK Machinery came,Did you come?

PK Machinery attended 2015 Chile Antofagasta International Mining Exhibition (Exponor Chile 2015) which was sponsored by the Antofagasta Industry Association (Antofagasta Industrial Association).

Solution to trommel screen mesh blockage of Kazakhstan customer

Our Kazakhstan customer told us that the trommel screen he purchased two months ago occurred blockage during the operation process which makes the screening efficiency very poor. After communication,we found out the blockage was caused by the high humidity material, here engineers gives some solutions accordingly to prevent blockage:

1.Add an automatic cleaning brush on screen which can achieve automatic cleaning during operation. 

2.Add an air compressors, since sand is slightly damp, so cleaning purpose can be achieved by air force.

3. Add an anti blocking device, due to the high frequency and small force of vibration impact, it can clean up the blockage efficiently.

In addition, textile screen mesh made of 16Mn can also adopted to ensure material pass through the mesh smoothly.

Hope above methods is helpful,further information please click: www.pkmachinery.com