Have Bargepoles Ready!
A google showed up a website www.singhgroup.net/sgcl which defined CP grade limestone as a comglomerate of oxides: which is not limestone. This material is quoted as run-of-mine with no treatment.About 45.05% of the material is unknown and the maximum lump size and fines are not known either. If r-o-m quicklime does exist,particularly as some dust, it will present a respiratory hazard in the dry state and if wet the heat of hydration can cause skin burns. There is also a troublesome magnesium oxide present and this might detonate under certain treatments. I would postpone any belt conveyor capacity and cover selection until after reading various MSDS for the product. If the exporter cannot supply an MSDS then he should be excluded.
Any existence of an MSDS by the exporter mentioned earlier is doubtful since he clearly does not know what he is producing. Why, because the website states that the material has been certified on despatch and yet there is 45% unaccounted for. Export is offered by barge. I wouldn't touch it with a bargepole. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Cp Lime Stone Handling.
Originally Posted by johngateley
Any existence of an MSDS by the exporter mentioned earlier is doubtful since he clearly does not know what he is producing. Why, because the website states that the material has been certified on despatch and yet there is 45% unaccounted for. Export is offered by barge. I wouldn't touch it with a bargepole.
Dear Sir,
Thank you very much for the input.
This material is very aggressive,hard white material with a good amount of white dust.
In India,this CP grade material is imported from Salala (OMAN),and is used in steel making.
The import is done through ports, and the quantity is quite high.
We tried to handle it with existing coal conveyors,but the belt get frequently damaged.If a single piece entering between belt and pulley
puncture the belt,which has M-24 grade cover.
My request is, if any one has experience in handling similar material,what type of belt is used.
What is the speed of the belt.
Rgds,
Narayanan Nalinakshan ■
Conveyor Belt Ripping
Conveyor belt ripping is not new. Certain grades of limestone are very good at this. Coal is a softer material and much less abrasive and hence does not usually rip your belt. If is very possible that the cover provided for your coal conveying is not suitable for limestone. You need to talk to Goodyear or some other belt rep to get the right selection. Goodyear now makes a belt with a "sensor guard" to detect belt ripping and preventive maintenance can be applied before it is too late. (No I am not a rep for Goodyear) I imagine other companies offer the same thing.
http://www.goodyearep.com/ProductsDetail.aspx?id=1848
Without seeing your conveyor arrangement it is hard to comment but it also sounds like you may have a problem with your transfer or loading point. If the material stays centered on the belt then you only have to deal with wear issues and not ripping issues. ■
Re: Limestone Handling By Conveyor System
Install a return plow just before the tail pulley and maintain it. No belt should be exposed to jamming at the tail pulley or any pulley for that matter. The problem is the system design not the belt. The belt needs to be designed for the tension created by the load and the cover designed for the wear factor. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Cp Grade Lime Stone Handling.
Originally Posted by Gary BlenkhornThanks you all.
We have a well designed conveyor system which is handling imported coking coal at 5000TPH,with out any problem.
But,at times the system is also used for handling lime stone.There is no much problem while handling SP grade lime stone which is less
abrasive.Problem comes only when CP grade is used.
The belt is provided with plough scrapers before the tail/take up pulleys.
All efforts are taken care off,but damage of belt happens at the skirts,if a small particle (CP) of get in between,and if a piece, by chance, jump over the plough scraper.
Hence we request input from experts who actually has experience in handling CP grade.
Rgds,
Narayanan Nalinakshan. ■
Design Adaptations
Dear Narayanan Nalinakshan,
proposal is upgrading your equipment:
a) plough scraper with top cover and deflector plates in order to not letting pass any lumps / particles of size
b) installation of additional run-in protection directly in front of return pulley
c) upgrading the chute / skirtboard edge sealing equipment to the more aggressive handled material
Regards
R. ■
Lime Stone Handling Cp Grade
Originally Posted by Roland Heilmannproposal is upgrading your equipment:
a) plough scraper with top cover and deflector plates in order to not letting pass any lumps / particles of size
b) installation of additional run-in protection directly in front of return pulley
c) upgrading the chute / skirtboard edge sealing equipment to the more aggressive handled material
Regards
R.
Yes Sir,
We are proposing to do the same.
Thanks a lot to all,
Narayanan Nalinakshan. ■
Limestone Handling by Conveyor System
Dear Experts
Please inform if CP grade Lime stone(Very Aggressive) is handled by conveyor system.If any one has experience,I like to know the capacity-TPH,and the
cover material used for the conveyor belt.Problems faced if any also may please be given.
Rgds,
Narayanan Nalinakshan. ■