Little By Little
It would help to know just what is being lined and what is being reduced? ■
Re: How To Reduce Impact On Liners
Originally Posted by tanmaytega
Please let us know the existing methods or new ideas to reduce impact in the primary impact zone.
Dear Mr.tanmaytega,
Ceramic chips are moulded on the top of the rubber liner. The rubber liner gives them cushioning effect and ceramic liners give wear resistance.
Regards, ■
Reducing Impact Wear
Is it possible to reduce the impact load be dispersing the feed or other means or perhaps construct 'wear pockets', by capturing a small quantity of the material.? Full details of the application are needed to consider other potential options ■
Re: How To Reduce Impact On Liners
Hello Tanmay Tega,
The material flow within the chute can be put into three categories:
1) Free fall trajectory. This will be parabolic (elliptical) for the material thrown off by the pulley. In certain situation, it will be practically vertical when dropping from impact zone etc.
2) Material sliding movement in inclined chute.
3) Material movement at impact zone, wherever it is impacting. It could be at chute plate or on horizontal shelf (stone box), etc.
The material impact arising due to sr. no. 2 and 3 can be controlled by proper layout of the chute by using the engineering information. Regarding sr. no. 1 its value input is by the belt velocity and the material free fall height (prior to impact). There will be very less control for the designer to change this value. The earlier respondents have given useful information about the different liners. The other option is to allow the material impact on horizontal shelf (if permitted), wherein material itself will act as a cushioning and also the sliding surface.
At Neyveli lignite handling system they use a hanging plate body with thick steel liner or heavy rubber liner on which the material (overburden) strikes and gets deflected. Such arrangement enables to adjust its position horizontally and also vertically to suit the need. The other important benefit is that this hanging body can be easily taken out and worn out liner can be easily fitted onto it because the liner pieces shape is of very simple type without curvature and odd shapes (which would arise if same are to be fitted on chute surface). This avoids the cumbersome maintenance work of fitting liner in chute at main impact zone.
I would like to add that if chute layout is made properly (engineered properly), same will remarkably reduce certain difficulties.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Author of Book : Belt Feeder Design and Hopper Bin Silo
Advisor / Consultant for Bulk Material Handling System & Issues.
Pune, India.
Tel.: 0091 (0)20 25871916
Email: parimul@pn2.vsnl.net.in ■
Re: How To Reduce Impact On Liners
Originally Posted by tanmaytegaPlease let us know the existing methods or new ideas to reduce impact in the primary impact zone.
DEar TanmayTega,
I was also wondering about this solution.
No one can conclude about this possibility without any attempt and measurements.
I see that as a good idea and opportunity.
Good luck ■
Re: How To Reduce Impact On Liners
This is the point where physics become an issue: the floor coverings reduced to small pieces sized about 3 cm, are cooled down to approx. 30°C or 40°C by means of liquid nitrogen, making them brittle. Within the impact mill, they are seized by a rotor with a circumferential speed of about 600 km/h and are then dashed against the mill wall, with the frozen particles going to splinters just like glass when hitting a stone floor. ■
How to Reduce Impact on Liners
we have this problem of reducing impact on liners by 70% to increase its life. For this we thought of introducing spring in liners.Is it in use anywhere, or can anyone give us idea on how to install spring on/in liners.
Please let us know the existing methods or new ideas to reduce impact in the primary impact zone. ■