Wear material for slurry pipe
Wear material for slurry pipe
(OP)
We currently use a carbon steel reducer on the discharge of a 3-2 Warman slurry pump (slurry is iron based, approx 90 deg C). The carbon steel discharge spool wears regularly and I was thinking about replacing it with a stainless steel spool, possibly 304 or 321. Will this give me better wear performance? Is this due to work hardening or another mechanism? What grade of stainless steel gives best wear resistance? I was also thinking about a ceramic insert although I was concerned about reducing the discharge inner diameter too much as it is already quite small.
Thanks in advance for your help.
Thanks in advance for your help.





RE: Wear material for slurry pipe
If you only consider the wear of the slurry, we don’t have good results with stainless. The work hardening only occurs when there is impact and this will probably not be the case in your application.
Have you considered the high-chromium white cast irons? They are used in sand slurry applications. When you have more than 10% Cr they are corrosion resistant and they are very abrasion resistant.
The only drawback is their lack of ductility. If the component is mechanically stressed you should be very careful. In large dredging applications white cast irons are sometimes used as a liner, with the steel casing having the structural function.
RE: Wear material for slurry pipe
good luck
RE: Wear material for slurry pipe
Simplest solution is to get a casting in Ni Hard or high chrome iron. The holes for locating bolts can be as ast or have ms inserts in those spots and drill later. These are fairly common in pumps used for pumping slurry.
Can you please tell the material of construction of the pump casing, impeller, wear plate etc?
SS will not be helpful so also any weld overlays as this would be worn out soon.
RE: Wear material for slurry pipe
RE: Wear material for slurry pipe
RE: Wear material for slurry pipe
RE: Wear material for slurry pipe
RE: Wear material for slurry pipe
RE: Wear material for slurry pipe
We have slag lines that take bottom ash from PC boilers and slag products from cyclone-fired boilers out to settling ponds under high pressure water below 100 deg c.
I would recommend either Ni-Hard cast pipe or ceramic lined pipe for fittings. We have used Ni-Hard and ceramic-lined fittings for years with great success. I would not use stainless lined pipe or fittings.
RE: Wear material for slurry pipe
However, if cost becomes the limiting factor you might consider stainless, look at alloy 2205. This is a duplex grade and is farily strong to start with. The surface will harden in abrasion service.
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Wear material for slurry pipe
http://www.abresist.com/materials_at_a_glance.htm
As a stop gap measure you might want to weld overlay the spool with Hastalloy C. A little expensive but will do a good job.
RE: Wear material for slurry pipe
rmw
RE: Wear material for slurry pipe
Cheers