Working Principle
The material enters from the feed pipe and is scattered into the rising airflow through the dispersion plate.The grinding medium fragments in the material overcome the resistance of the rising airflow under the action of gravity and fall down,and are discharged from the slag discharge port.The airflow carrying the powder rises to the classification part and enters the rotor through the guide vane for classification.The guide vane can make the airflow and powder particles produce a rotary motion for pre-classification,and capture the coarse particles thrown out by the rotor,and can also make the airflow speed evenly distributed over the entire rotor height.The coarse particles captured by the guide vane fall onto the coarse powder cone and are discharged from the coarse powder outlet,while the fine particles and the airflow pass through the rotor blades into the middle of the rotor and are sent to the collection device from the fine powder outlet.
Features
1.The material is dispersed outside the classification area.Due to the effects of the dispersion plate,the intermediate connecting air duct and the guide vane,it has both static inertial classification and dynamic classification functions,and the material dispersion is high and evenly distributed.
2.The classification area of​​the powder selector is narrow and long,the air flow field is balanced and stable,the classification performance is good,and the classification efficiency is high.
3.The powder classifier has a large processing capacity,and with other powder classifiers,the volume can be made smaller under the same processing capacity.
4.Simple structure,long service life of wear-resistant parts;
5.Small air volume and small pressure difference loss;
6.The fineness of the finished product can be controlled by adjusting the wind speed,which is convenient and reliable;
7.It has a drying function;
Classification of limestone powder classifier
Powder classifiers are widely used in coal mills,raw material unloading drying mills and cement mill systems in new dry cement production lines.It can be divided into three categories:three-separation powder classifiers,centrifugal powder classifiers,and cyclone powder classifiers.There are many types of powder classifiers,and different types are suitable for different materials.Different models are also made according to customers'requirements for material fineness.Common powder classifiers include cyclone powder classifiers,three-separation powder classifiers,centrifugal powder classifiers,coal mill special powder classifiers,calcium powder special powder classifiers,etc.Later,many high-efficiency powder classifiers and high-efficiency three-separation powder classifiers were developed.They are new generation varieties that improve deficiencies and increase production on the original basis.
Common faults and troubleshooting of limestone powder selection machine
(1)Gearbox heating or"smoking"
Cause:Gearbox lacks oil,poor lubrication,poor oil quality.Overloaded use.Transmission body failure.
Troubleshooting method:Improve lubrication,add oil or change oil.Control load or improve transmission design.Analyze and treat according to"burning oil","bonding","thermoplastic deformation"and other specific problems
(2)Gearbox vibration and noise
Cause:Poor tooth contact surface.Side clearance is appropriate,axial movement.Bevel gear accuracy is out of tolerance.
Troubleshooting method:Adjust the contact surface.Adjust the side clearance and eliminate the movement.Replace the bevel gear.
(3)Bevel gear root crack or break
Cause:Poor tooth contact surface.Side clearance is appropriate,axial movement.Bevel gear accuracy is out of tolerance.
Troubleshooting method:Adjust the contact surface.Adjust the side clearance and eliminate the movement.Replace the bevel gear.
(4)Gear thermoplastic deformation and bonding
Cause:Poor lubrication,less oil or no oil.Overloaded use at high speed.Troubleshooting:Clean the oil tank,change the oil and add oil.Control the speed,control the load or improve the design
(5)Severe erosion and peeling of gears
Cause:Bearing clearance is too large,bearing wear is serious.Material or heat treatment is poor.Overload use.
Troubleshooting:Repair or replace the bearing.Improve the material,improve the heat treatment.Control the load.
(6)Severe wear of gears
Cause:Poor protective seal.Poor oil quality,impurities in the oil.Poor material.
Troubleshooting:Strengthen the protective seal.Clean and change the oil.Use wear-resistant materials.
(7)Abnormal heating and noise of rolling bearings
Cause:Poor lubrication,lack of oil and severe wear.The flange bolts at the end of the horizontal shaft are loose and the teeth are slipped.The fit is loose and the clearance is larger.The upper adjustment nut thread is slipped
Troubleshooting:Add oil in time and increase the oil volume for a short time.Re-tap and resize the bolts.Dismantle and repair.Process the shaft head,re-thread,and replace the nut.
(8)The blades of the powder selector are damaged or fall off,and the body swings
Cause:The blades are of poor quality and the weight is inconsistent.The blade fixing bolts are loose.Improper installation,causing upward or downward deflection.
Troubleshooting method:Replace the blades,weigh and install evenly.Check the bolts,tighten the bolts with washers.Adjust the installation position.