Re: crushing of coke

Indian coke is notorious for its high sulphur,phosphorous and ash
content. This extremely high levels of  silica in ash contributes to
the wear. I agree that hadfield steel is a wrong choice for this
application,but the practice is to use hadfield steel for the past 45
years. Only now this has been given due consideration.

"David Deuchar" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> In order for high manganese steels to work well they need to work harden,
> coke being light does not do this well compared to say iron ore. This does
> not mear to me that coke is abrasive just that the choice of high manganese
> is not appropriate.
> There is little point in arguing over coke abrasiveness, any material being
> transported will cause some wear.
> 
> "Arun Rao" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > Coke used in blast furnace is very abrasive in nature. I have just
> > completed supply of high chrome iron liner plates used in a hopper
> > for a steel plant. Earlier high manganese steel was used which would
> > wear out soon.
> >
> >
> > "David Deuchar" <[EMAIL PROTECTED]> wrote in message
>  news:<[EMAIL PROTECTED]>...
> > > "Jon Juhlin" <[EMAIL PROTECTED]> wrote in message
> > > news:[EMAIL PROTECTED]
> > > > Our company has been asked to quote a cone crusher for use in crushing
>  coke.
> > > > Maximum feed size of 6" crushed down to 1/2"-. Our main experience is
>  in
> > > > providing crushers for aggregate production and have no direct
>  experience
> > > > with coke. I know very little about coke other than it is coal with
>  the
> > > > volatile components baked out of it for use as a carbon source for
>  steel
> > > > manufacture. The only crushing related information is that it is not
> > > > particularly abrasive but rather sticky and plastic in consistency. It
>  has
> > > > been described as not unlike recycled asphalt from the standpoint of
> > > > crushing.
> > > >
> > > > Any information on crushing coke in general and crushing coke with a
>  cone
> > > > crusher in particular would be read with great interest. If not too
>  much
> > > > trouble please copy replies to:
> > > >
> > > > [EMAIL PROTECTED]
> > > > [EMAIL PROTECTED]
> > > >
> > > > Jon Juhlin
> > > >
> > > >
> > >
> > > I have not used a cone crusher for coke. I know of a rod mill using high
> > > carbon pearlitic steel rods and a rubber liner. I seem to remember a
> > > temporary jaw crusher which probably had Hadfields manganese jaws, but I
>  do
> > > not know if coke would give much workhardening on hadfields manganese.
>  The
> > > crushing strength is probably known by your customer as it is probably
> > > important for their customers.
> > >
> > > In general terms coke is easy to crush compared to most rock. It is also
>  not
> > > very abrasive. Be careful if asked to work with sinter (for iron
>  production)
> > > as this is very abrasive.