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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...MOC for 67% Sulphuric AcidMOC for 67% Sulphuric Acid
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4/22/2006 9:00 AM
 
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We are looking for a suitable MOC for a pump which can pump 62-69% Sulphuric acid at the rate of about 12-15 MT/hr. The operating temperature is about 80-180 deg C. The sulphuric acid is likely to contain about 6-8 gm/kg of very fine (>200 mesh) suspended carbon particles. Since the operating temperature is 80-180 deg C the MOC should be such that it can handle the acid in a broader range of 50-200 degC. Presently we are using High Silicon Iron whose failure rate is high due to its brittleness. Venkat
 
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5/5/2006 9:00 AM
 
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Venkat For this concentration and temp , platinum is the most suitable. next best could be zirconium. Not sure if you can get pump impeller / pu,p boday ready made. Trust this is of help to you C.V.Srinivasan Nishi Engineers Pvt Ltd India may 06,2006 E-mail: nishi@vsnl.com >We are looking for a suitable MOC for a pump which can pump >62-69% Sulphuric acid at the rate of about 12-15 MT/hr. >The operating temperature is about 80-180 deg C. The >sulphuric acid is likely to contain about 6-8 gm/kg of very >fine (>200 mesh) suspended carbon particles. > >Since the operating temperature is 80-180 deg C the MOC >should be such that it can handle the acid in a broader >range of 50-200 degC. > >Presently we are using High Silicon Iron whose failure rate >is high due to its brittleness. > >Venkat
 
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5/6/2006 9:00 AM
 
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Dear Mr Srinivasan, Thank you very much for your reply. Can you please suggest what material will be suitable for the same service in case acid temperature varies between ambient (around 40 deg C) to 100 deg C (max) as we have a provision to quench the stream before it goes to the pump suction. Therefore the pump is likely to see a temperature in the above range (40 - 100 degC) in normal case. venkat
 
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5/8/2006 9:00 AM
 
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For your reqd. specification one of the best MOC could be Alloy 625 , next best Alloy C 22 and next best Alloy 20. You can further promote like of pump internals by suitable PTFE lining. regadds Debasis Mitra Debasis.Mitra@hpl.co.in
 
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6/13/2006 9:00 AM
 
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C.V. I have read your responses to many quetions on this forum for a couple of years. I find your postings to be informative, well-worded and respectful of the forum participants. I have also specified, selected and designed centrifugal and positive displacement pumps for many years. I have specified pumps of steel, CI, all types of stainless and Ni alloys. I even saw a pump casing and impeller made from oak................but never platinum. Can you tell us more about a supplier of this platinum pump, and if a jewler must be called in to adjust the pump seals ? Would the casing/impeller capital investment would rival the cost for the remainder of the plant ? I could not resist ....... a little sarcasm -MJC
 
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