Grizzly Not Bearing Up?
You could consider throwing the grizzly away and placing an MMD (there is no equivalent) sizer in it's place. SORTED! ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Pushing Away
Dear Mr. Anil Seth,
on pierside, you will surely have no adequate space. Same probably on landside. So, perhaps you could consider installing a pushing or pulling appliance, shovel like, which would be moved over the primary grid and remove or else partly crush the oversize towards appropriate side collecting installation. If collected oversize is moved towards one side, it could then either be conveyed away or secondary crushed as John has pointed out.
Regards
R. ■
Diddling With Middling
If the original target was/is -150mm then the 170mm grizzly should never have been there in the first place! Furthermore, replacing the grizzly with stationary decks of 330mm and 200, or 230mm, is even more hit and miss. A middlings product is created without anywhere to go and this pretence of a port pretends to be surprised! Cut the stationary obstruction out of the way; attach a robust horizontal flange; bolt on the MMD sizer and take it away. Away being -150mm coal as requested.
What is the spillage situation when feeding 200mm lumps onto a belt designed for 150mm lumps? Obviously your client specified a cheap plant to handle some rough r-o-m coal, then found out he couldn't even afford that so he bought even rougher r-o-m and found out that he couldn't handle it at all. Innovation won't cut it and I advise you to examine your Client's liquidity before undertaking anything regardless of the level of innovation. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Innovative System For Mobile Hopper
Originally Posted by johngateley
Thanks Gentlemen, for your expert advise. Is it possible to install a tilt table Grizzly on the top of hopper(with adequate volume to store coal, more then 30-40% of the capacity of grab).Whenever there are bigger size of lumps in the Grab,the same shall be removed after tilting the Grizzly on the top of another mobile hopper on the berth. In this case there is no need to modify the hopper and install crusher underneath.
Regards, Anil ■
Re: Innovative System For Mobile Hopper
Gentlemen, Please go through the https://www.youtube.com/watch?v=7XgjWZCAo8 ,where clearly shown that over sized material is being rejected by the tilt table Grizzly over the hopper.We can design similar type of system for mobile hopper too. In the case,the over sized material(+200 mm and above) which is 10% of the total capacity(1250 tph) @12-13 tph shall be pass/convey either on the open truck and then crush the material at other location or convey to the mobile crushing system with loading conveyor.
Regards, Anil ■
Timewasting Supremo.
So the point of the thread was not to seek an innovative solution but to show the forum participants how not to do it. Not the first time we've seen this sort of thing from a particular sub-continent is it? In a previous shiploading thread it was eventually revealed that there was a proposal to move a ship under a loading spout and also control the weather while doing so. Just get on with it. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Discussion Vs. Being Nice & Silent / We Are Who We Are
Dear Mr. Anil Seth,
speaking entirely for myself it is however that I'm most unhappy about your above statement.
Being an engineer means for me living with the need to understand all aspects of an issue. So, I very much prefer a truth with an edge to a deferential receiving mentality and a top - down attitude which takes a statement and is happy and silent with it.
In order to evolve one needs to give input without fear of being wrong, having made an effort it is worth to present it to others.
So, why in this forum take anything personal, rather than to see an effect of someone's input on others and then to evolve. There's nowhere else where such knowledgeable experts as John give advice for free and be it in their own words.
But what is imo much more important, that is to get substantial feedback on the primary issue. It makes me unhappy if I should think there's people out there just taking any of my answers as some kind of divine wisdom and not even dare or care to reply or to give a feedback of their own thoughts and design ideas.
In the hope of you kindly understanding the intent of my post, with
Regards
R. ■
Innovative System For Mobile Hopper
Dear Roland, I respect your feeling and advise.
Regards, Anil ■
Innovative System for Mobile Hopper
We required solution for over sized coal in mobile hopper
Present Scenario--
The present unloading system at Port is designed for coal size upto 150mm ( thermal/ steam etc). Unfortunately the coal parcels are containing 5 to 15% large size lumps upto 1200mm X 500mm. This chokes the grizzly on the hopper and brings the discharge process to stop. The bigger lumps/oversized lump have to be either physically removed from the grizly or crushed to smaller size so that they pass thru the grizzly. Original grizzly size was 170X170 but that have been increased to 330 X 330 on top and inserted an additional grid of 220 X 230 at the belt feeder drop to the main belt ( basically to protect the belt) from damage due to oversize material.
There are two nos of mobile harbor cranes(MHC) and mobile hopper. Each MHC crane is feeding the hopper @1250 tph and the grab volume of Mobile Harbour Cranes is 40 cbm.
Regards, Anil Seth
Libran Engineering&Services
www.libranengineering.com
00919811055650 ■