Re: Carryover Test
Mike
Not quite sure what you are getting at, what you need and why you need it.
LSL Tekpro ■
Re: Carryover Test
I'd say he talking about carry-back; the material that adheres to the belt after the discharge trajectory.
If so, I'd suggest looking for papers by Prof. A Roberts or Dr David Bennett of University of Newcastle. David has written a doctorate (or something similar) that extensively researches this field.
Otherwise, talk to the suppliers. Belle Banne or Martin Engineering would be a good start. ■
Re: Carryover Test
Matt is right. I was talking about carry-back. We have a customer who would like to have it measured, so I am after some material to allow me to do in a consistent way, so that all variable, or as many as possible, are incorporated in the testing, test interpretation.
Thanks again on your help.
Regards,
Mike ■
Re: Carryover Test
There are ways to obtain carry-back tonnage rates.
First you need to apply your normal primary muck scraper and, if used, typical secondary cleaners.
Second, you need to apply a test scraper, before the first idler station, that samples/removes locally across the belt width at 6-10 equally spaced intervals. These local blades occupy about 50% of the contaminated dirty side belt width
The scraper must be competent to clean > 99% of the carry-back residue per blade, followed by a second and maybe third blade, in alignment with the first blade to continue wiping the same surface for further residue measurement. In this way, a prediction of the particular blade efficiencies can be reasonably determined (back-engineered).
The efficiencies include both the prior cleaners and possible new blade concepts such as Martin (back rake) or Hosch (forward rake). Under each blade a container or catch basin is installed. The catch basins are designed to contain a quantity that is comencerate with measurement deposition or carry-back rates and cleaning time intervals.
The successive blade positions and containers are removed together, having the same installation and cleaning times.
Weighing the collection trays indicates deposition rate per test time or interval, rate per location, tests that can separate wet and dry ores, efficiencies of coarse and fine ores, and differences between cleaner blade types, pressures, et al.
Lawrence Nordell
www.conveyor-dynamics.com ■
Carryover Test
Hello,
I would like to know if any standard procedure for carryover testing exists. I have some ideas how to do that and what the critical parameters are. However, I would prefer to follow a standard procedure if one can be found.
Best Regards,
Mike ■