Installation, Commissioning and Operation of Cement Screw Conveyor


The spiral body of cement screw conveyor is driven by gear box to transport powdery and granular material. The inlet is spherical and can turns. Cement screw conveyor has the features of easy assembly and disassembly, large capacity, safety and reliability, and high accuracy of helical surface.
The conveyor casings are connected through flanges, the equipment rigidity and sealing are good.

1. Installation and commissioning of cement screw conveyor
1) Make sure all the conveyor parts are clean before installation.
2) The erection sequence of casing and spiral body is from head section to the tail section.
3) The flanges of adjacent casings should be smooth and tight connection. The length accumulative error between casings and spiral body can be adjusted by placing asbestos pad between flanges.
4) The adjacent spiral blades should be welded onto the right places of shaft, to ensure that the helical pitch of front and back spiral blades are identical.
5) Make sure all the fasteners should be tightened to a state of reliability, and the straightness of casings is in the range of 1.5mm/m.
6) After installation, all the lubrication points should be added enough lubricate and grease according to the requirements.
7) The electrical wiring should be safe and reliable, as well as in compliance with requirements.
8) After half an hour of non-load test run, cement screw conveyor should be in good condition, the inspection standards are as follows:
a. Smooth operation without abnormal noise, the fasteners are not loose.
b. The temperature rise of bearings are less than 30℃.
c. The lubrication sealing is good, without oil leakage.
d. The electric equipment is safe and reliable, no-load power is not more than 30% of safety power.
9) After half an hour of load test run, cement screw conveyor should not only meet the above inspection standards, but also the following ones.
a) The material feeding and discharging are uniform and smooth. The equipment capacity meets design standards.
b) There is no leakage of material.
c) Load power should be less than 80% of safety power.

2. Operation and maintenance of cement screw conveyor
1) The lubrication maintenance should be done as per requirements.
2) Make sure the conveyor is inspected to be in good condition and lubricating maintenance before starting up.
3) After no-load test for 3 minutes, the inspection results of screw conveyor should meet the above standards. If there is any abnormal occurrence or malfunction, the equipment should be shut down for troubleshooting.
4) Make sure there is no any material left in the conveyor tube after the operation is finished, then shut down the equipment.
5) When the conveyor is transporting the material that become damp and agglomerated easily, the power should be cut off immediately if the equipment is halted due to power failure. If the downtime is more than 8 hours, the material contained in the conveyor tube should be cleaned up to avoid equipment damage.
6) If the downtime is more than 24 hours, not only clean up the material contained in the tube conveyor, but also check whether the middle hangers and spiral body are in good running condition.
7) The operating and maintenance personnel should be trained, who are well acquainted with conveyor structure and strictly follow operation regulations.
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