Grabs For Coke
Dear Sir.
We have same problem in our port terminal in chile (south america) we unload pet koke, mineral coke and carbon all of them spills a lot.
One of the reason is that the system is not providing enought tension (force) on the wire ropes to close the grab.
In the mew machine (electronicaly drived) we change the relation of tork for the close/open wire rope and the problem stop.
In the Older machine we work a lot on the scisors and the problem stop partially.
I think you have to push your maintenance people to work on it.
Clams are better and can be rented but somebody shall check the design of the cranes you have on give you an answer. Some cranes can not be used by other kind of spoons.
Marcelo Alonso
MAL ■
Re: Avoid Grabing Operation In Shipping Of Coke
The material loss (wastage / leakage) during grab unloading can occur mostly by two counts.
1) Material leakage from grab. Some of this material will directly fall into the ship hold and some may be wasted. The material partially seized around the grab edges will mainly fall into the ship itself. The material which is actually leaking from the grab will be mostly wasted, because most of the travel path of grab is beyond the ship hold.
2) Material being carried away by the wind, when it is falling from grab to the hopper mouth. As I have seen at some of the installations, the material loss due to serial # 2 appeared to be much more compared to serial # 1.
Sometime back there was discussion on this subject in this forum. I had mentioned some suggestions for designer of the equipment to think about feasibility of such provision.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Advisor / Consultant for Bulk Material Handling System & Issues.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25882916 ■
Avoid Grabing operation in Shipping of Coke
Hello all,
We import Met Coke for Blast Furnace. Problem is generation of lot of fines in the course of loading/Unloading of Ship & than Barges at our Jetty.
Out of the many reasons for this, I find that Grab biting is the major culprit.
Is there any way, we can avoid Grabbing of Coke?
Is there any difference in using Scissor, Clamshell or Cactus Grab? or using Electro Hydraulic Grabs instead of Mechanical grabs will help?
Regards
( P. Rekhawar) ■