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Acid etch (ammonium bifluoride) solids handling
Q. Hello Everyone,
I work as a chemical technician in anodizing industry. We have acid etching process in place. To maintain concentration of fluoride levels we have periodic Acid etch solution additions into process tank.
We regularly prepare this Acid etch solution with process water and ammonium bi-fluoride (in solids form)supplied from vendor. While making the Acid etch solution we use process water from the Acid etch process tank and mix it with 640 kg's of ammonium bi-fluoride from a tote to make 400 gallons of concentrated solution. The process of mixing solids in the tote with process acid etch solution is done physically by chemical technicians. I am looking for suggestions to make this system less labor intensive. (i.e. I need suggestions regarding a system which can pump solids from a tote to mixing tank to make the process robust)
- Toronto Ontario, Canada
September 28, 2021
Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)
"Guidelines for Safe Handling of Powders and Bulk Solids"
by Center for Chemical Process Safety
on
AbeBooks
or
Amazon
(affil links)
A. Hi Navachandan. I have seen vacuum systems used for powders like hydrated lime, but you probably need to find a vendor who really knows exactly what they are doing :-)
Handling of virtually any powder is a tricky thing for many reasons, and in the case of a fluoride powder which could potentially be inhaled, even more so. Hopefully highly experienced vendors will contact you.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
October 2021
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