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Angela Beveridge writes to the sowacs list: ===8<============== We are currently working on a project which involves adding chemicals to various mineral processing waste streams to make them de-water more quickly. Faster dewatering means better water recovery which can go back to the mine, it also means that the area can be re-vegetated more quickly since trucks can access the area more quickly.Ý Also the same footprint can be used to deposit more waste if dewatering is accelerated. Do you know of any apparatus that can be placed into this sort of environmentÝand will give an indication of decreasing water content (typically in the range of roughly 30%-70%)Ý I would need the instrument to be precise enough to distinguish the difference between say a 50% solids content and 52% solids content.Ý I guess the accuracy of the reading would be up to me to do some sort of calibration?? One of the problems with our project is access to the working area.Ý Mine disposal is often like thick mud, and it's not possible toÝwalk on the disposal area in order to take a sample,Ýuntil it has dried a bit. Do youÝknow of any remote signal systems - i.e. the detector can be held a few metres away from theÝsensor. Initially I was hoping to find some almost disposableÝsensors that could be buried under the incoming disposal mud, but would still give off a reading which could be picked up by someone standing close by. Have been in touch with Sentek briefly, but it looks as if what they have to offer would cost in excess of $20,000 and isn't really portable. Do you know of anyone else doing work in this area? Thanks in anticipation of a response. Rgds Angela Beveridge Angela.Beveridge@cibasc.com Senior Development Chemist Ciba Specialty Chemicals 6-8 Donaldson Rd Wyong North NSW 2259 Tel 61 2 4350 3200 www.cibasc.com ===8<============== NOTE: To get off this list, send an email to list@sowacs.com with the subject line: unsubscribe_sowacs For full instructions see this page: <http://www.sowacs.com/subscribe/index.html> Ý