Explore this. Appears to be what you need.

Duriron and Durichlor 51M - Flowserve Corporation

Ceramics, plastics or glass.

http://www.coleparmer.com/Chemical-Resistance

It is always difficult to get good resistance to both corrosion and abrasion with the same material, especially if the temperature is elevated.

For plastics, HDPE would be best.

For metals, something like super duplex ss might be ok, or something approaching Hastelloy G (if you can find it). High-chrome or high-silicon irons would be better. The material mentioned by Joshi (not sure why he marked it OT?) is a good example of the latter, and should work well. Duchting Pumpen also use some interesting materials for corrosion/abrasion resistance.

OP stated that he tried polypropylene (I assume that's what the PP stands for). I doubt that HDPE would function any better. OP, what was the failure mode of the PP? and does it stand for polypropylene?

PP usually means Polypropylene for pumps.

HDPE is probably the best of the plastics for abrasive duties, and is commonly used for slurries. It also has better resistance to HCl than PP. Overall it would be considerably better than PP.

PP is polypropelene. In our locality it is fairly hard to get HDPE Pumps of good quality.

We are thinking of filling the press by pressurising the feeding vessel with air and see the result.

Thanks for the help and suggestions.

"pumps made of PP as well as Hastelloy C 22 materials......failed..... two months."

In such cases my experience is little different. Hastelloy and even PP & HDPE pumps are costlier. I recommend to use Cast Iron pumps. Its impeller wear out faster in corrosive and abrasive medium, may last only one month or even less. Its CI body may last for 2 months, same as Hastelloy. Going for CI pumps with few spare impellers is a cost saving option. For such service, pump is a consumable item.

Hi Arun,

Look for a high temp rubber lined pump, if you can find such a thing or a ceramic lined pump and impeller-- I used to maintain a small (16 tons / hr) mine /mill operation where we were grinding (in a ball mill) then pumping 60% solids density silica / sulphide based silver ore ( ours was at ambient temperature which is a better situation than you) and we were using steel balls at a rate of 400lbs per shift--- when we switched to ceramic we were adding about 400 lbs per week we were able to switch from CI to rubber lined pipe and pumps and go from monthly replacement of the main discharge pump and pipeline to several months on the pump and the main discharge line was still in 2 yrs after we changed it

Good luck

Soy Cowboy

UHMWHDPE is one of the most wear resistant materials. It is used as lining for chutes loading iron ore, which wears out even metal chutes.

Pumps made with these are available from various suppliers.

One such is :

Mieco Pumps and Generators Private Limited

# 162, Sadar Patrappa (SP) Road,
Bangalore 560 002, India.
Tel: +91 - 80 - 51225275, 22239173

Please discuss with some concerned technical person in that company about the suitability of UHMWPE pumps for your duty.

As an aside, we use UHMWHDPE in various high wear applications with good results.

Thank u for the information. However, I am glad to inform you that pressurising the feed tank with air and filling the Filter Press has been successful and we could finish our filtration in no time.

I will pursue with the pump manufacturer for future requirements.

I'm glad to hear that you are successful. It's really a good alternative. Only thing you have to check whether the tank is designed for that pressure or not? It may not be useful for continuous process, because you need to depressurize for filling the tank.

"I will pursue with the pump manufacturer for future requirements." Why???

Not for the same purpose. But for slurry transfer applications it may be useful.

The feed tank is designed for 6.0 kgf/sq.cm. pressure.

As this is for filter press feeding it is an intermittent operation.

Thanks for your caution.

Is it possible to post pictures or descriptions of the failure modes? That would help determine the if it is a design or material compatibility problem.

If the problem with PP was more a wear issue than compatibility I would suggest a plastic diaphragm pump. These are available in high pressure types designed for filter presses & do not have the wear issues that centrifugal pumps have with abrasive solutions (you do lose out on efficiency though). Another option is a hose pump. Both of these are well suited for handling abrasive/corrosive materials including small solids; the hose pump designs usually allow easy wetted element replacement. Bredel & Verderflex are 2 common examples of these.

Just Google AODD- material compatibility charts & also Hose Pumps (sorry, no good at links!).

I'd recommend a heavy duty rubber lined slurry pump. Metso has a line of pumps that would be suitable. www.metso.com