Application of reducer-rod grinding machine
The Rod mill is made up by several parts, as follow:
- The tube part: there is a man’s hole in tube that used for examining and repairing and changing liner.
- The feeding part: used for feeding.
- The discharging part: used for discharging proper product.
- Main bearing part.
- The installing of mainframe:
- Driving part:According to requirement of process line, rod mill is divided into the left rotary and right rotary .It depends on the contract.The Rod mill works principleThe motor drives the tube rotary by reducer, ore and steel rod can be thrown and rushed down by force of friction and centrifugal force to a certain height when tube rotaries ,and then ores can be crushed and grinded gradually. Crushed ore discharge by output part .The feeder feeds evenly, ore is fed by combine feeder continuously, the crushed ores discharge gradually .Rod mill can work continuous for 24 hours per day.
The rod mill should install on steady concrete groundwork. The foundation designed and the construction looks at general drawing and foundation drawing. In order to make change of location accurate assembly small in use, the foundation of Rod mill adopts full piece structure.
If the compression resistance of concentrate foundation is more than 75%,the rod mill can be installed .Before installing ,the quality of foundation should be examined that the concentrate has no effect on resistance and quantity of prep hole and the location .There is no dust in the prep hole .Adopts the ground wire method ,should prep bury the center label board on the surface of the basic .Before installing all the center line should be remarked clearly on the center label board on the basic and as the norm.
Before hoisting, every part of rod mill should be examined .If found questions; it should be dealt at once.
1.The general requirement of Energy saving Rod mill for installing:
The axes of Rod mill main frame should be level, measured on top of big flange of medium-altitude bearing that on two ends, the height should be identical .If has error, it is allowed that feeder is higher the output 1mm.Seen from bearing cover of medium-altitude bearing on two ends, the around gap between medium-altitude bearing and bearing cover should be identical, and the out and the inside bearing cover too.
2、The installing of driving part:
After mainframe is identical, driving part can be installed .First, check quality of driving part, especial check concentric of small gear wheel bearing and reducer low speed bearing; concentric of reducer high speed bearing and motor bearing, if necessary to adjust and tighten.
Set the big gear wheel of mainframe as standard, install and adjust driving part .Make the width between small gear wheel and big gear wheel even .Make the side of the small gear wheel and the big gear wheel parallel .The smallest gap is 0.25mm .Seen from track of big and small touched, the touched track takes up 60% from whole length, and 40%from whole height.
If the touched track leans to one side, means the gear side is not parallel .If the driving big gear wheel crowded, means the gap of the gear wheel is too small, adjust it bigger.
3、The installing of rod mill liners:
（1）Before installing liners, the inside tube should be cleaned .And then examine the liners to make surface and around flat. The holes of screw should keep clean and make the bolt can be input freely and reach installing requirement.
（2）When installing the liners, should scrawl the 1:2 concentric mortars between inside tube and liners. And make screw of liners tighten when it is wet .The clearance between liners should make be even by the mortar.
（3）Tighten the liner bolt, should carefully make the airproof mat good to prevent material leaking.
（4）The liners of tube can not have ring clearance.
（5）When strength of concentric mortar is proper, feed the mine to test drive .If screw is loosen should be screwed tighten in time.
4、The fault judged:
The bearing is hot, check it is lack of oil. The mainframe bearing and small gear wheel bearing adds the butter for lubricating; the reducer adds the engine oil for lubricating. If it is not lack of oil ,examine concentric of every part and mainframe and driving part .As the result of big gear wheel bearing and medium-altitude bearing are not concentric that medium-altitude bearing presses bearing cover comes out of the heat .As result of driving small gear wheel bearing and bearing are not concentric that driving bearing press bearing cover comes out of heat .Not concentric of the reducer with small gear wheel bearing and reducer with motor can comes out of heat .If medium-altitude bearing with big bearing is heavy concentric ,it can come out of starting difficulty ,the motor comes out of heat etc. So, when installing, making sure the concentric is very important.
The experimental work of rod mill
After installing, verifying proper, and then can start the hollow experimental work .The experimental work is in the charge of skilled the operator and obey the operation procedure strictly.
（1）The hollow experimental work time is not less than 12to 24 hours, if found faults should be solved in time.
（2）If hollow experimental work is normal it can start the experimental work with load .This time should divide into steps .The feeding quality should depend on the output, so as to get rid of not necessity damage of steel rod and tube with liner
1、Adding proper mine and one third of steel rod to test drive 12-24 hours.
2、Adding the two thirds of steel rod to test drive 24 to 48 hours.
3、According to the output and proper product quality and the actual installing quality of rod, make sure the proper installing quality of the rod to test drive no less than 72hours.
（3）The adding of lodge and time of experimental work depend on the situation (such as temperature, noise, gear touched etc of big or small gear wheel and reducer. Before the accurate of gear touched does not reach design requirement, it can not work full lodge.
（4）In the experimental work time, cooling and lubricating should work normally .And temperature of main bearing, driving bearing, reducer should be normal.
（5）After installing the two thirds of steel rod and works for 24to 48 hours, should examine every part and relax all bolts.
（6）When starting the experimental work, should make notes carefully.
The operating of Rod mill
（1）The prepare works before starting:
1、Check that if anyone is in the dangerous place.
2、Checked that if the quantity of the lube is correct, if not should add in time.
3、Check that if the adding steel rod rate is correct. 4、Check that if bolt is loosened. 5、Make man’ hole cover steady.
6、Check that does the water or mine leak.
7、After the first turn or long time milling, start again first adds the lube to medium-altitude bearing.
8、Contact with referred work station, if get start signal, and then start mill.
（2）The order to start:
- Start rod mill.
- Start feeder machine.
(3The order to stop machine:
1、Stop feeding.
2、Stop rod mill .If stop for a long time, should discharge steel rod and mine.
The maintains and examine repair of rod mill
1、All the lubes should change once a month, and in the future, according to the repair and examine change the lube once per six month.
2、Every lubricant part and the surface height of the oil should be examined once per four hours.
3、When the mill works normally, the temperature of lube that in the main bearing is no more than 55℃.
4、If the mill works normally ,the temperature of driving bearing and reducer is no more than 55℃ ,the highest is 60℃.
5、The big and small gear wheel drive evenly, no noises .If necessary, should adjust the gap in time.
6、The rod mill rotaries evenly, no strong shake.
7、The electricity of the motor should be provided evenly.
8、Each connected tighten parts are no loosen, no oil and material leaks.
9、The quantity of adding steel rod depends on the fray case.
10、If found the deviant thing, it should stop work and repair at once.
The maintains of the mill is a piece of regular work .The effect of the maintains can affect the rotary rate and its life .In order to find the fault in time and make the mill work normally, except the maintains daily, need to fix a date to stop milling (advise once per month and examine the medium-altitude bearing, main bearing, tube, reducer, big and small gear wheel etc
carefully .make the notes details. According to different faults, arranging the repair work.
11、If the liner of mill is frayed 70percent or the length of gap is 70mm, it should be changed.
12、If the bolt of liner is destroyed, it should be changed.
13、If the main bearing is frayed heavily, it should change.
14、The fine-tooth comb is frayed heavily, it should change.
15、If the big gear wheel frayed heavily, it turns over to go on to use.
16、If the small gear wheel frayed heavily, should change it.
17、If the bolt of the feeder or output destroys, should be repaired in time .If can not repair, should change it.
18、If the foundation bolt is loosened or destroyed, should be repaired at once.