Alumina Powder restructuring.is it possible

Posted in: , on 24. Dec. 2004 - 09:23

Greetings to you all.

I have a question for the scholars of our community. When Alumina dust is removed from the system in either transferring or smelting, the dust is of little value to anyone.

My question is. Can a alumina particle of less than 20 micron be rejoined or bonded together with some type of medium that is not detrimental to the smelting process??

Answers on this difficult question will be appreciated.

Thanking you

Gibbsy Australia ■

Knowledge , is simply what is waiting to be discovered and used.
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Alumina

Erstellt am 10. Dec. 2004 - 03:13

thanks for your reply

What I am interested in is the cost effective means of making Alumina dust , <20micron bond together into larger particles ie >20 micron and yet <90 micron.

Thanking you.

This is to be beneficial in the Smelting Industry. ■

Knowledge , is simply what is waiting to be discovered and used.

Re: Alumina Powder Restructuring.is It Possible

Erstellt am 10. Dec. 2004 - 08:43

Just a thought - I wonder if it could be bonded with cryolite using a sintering process? ■

Peter Donecker Bulk Solids Modelling [url]www.bulksolidsmodelling.com.au[/url] [url]https://solidsflow.wordpress.com/[/url]
Graham Price
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Re: Alumina Powder Restructuring.is It Possible

Erstellt am 14. Dec. 2004 - 07:50

Your aluminium powder can probably be agglomerated (cemented/bonded) onto larger particle sizes using calcite (CaCO3) as the bonding (cementing) agent using a technique called CIPS that my company is commercialising. I have already agglomerated fine dust particles (eg road dust, composed of small rock fragments) into larger sizes by simply spraying the CIPS solution onto the dust. That is, particle sizes increased from clay-sized particles (average about 30microns) up to fine sand-sized particles(average about 350microns).

I do not know whether calcite is detrimental or not to what you want to do.

Let me know what you want.

Graham ■

Re: Alumina Powder Restructuring.is It Possible

Erstellt am 14. Dec. 2004 - 04:00

Interesting. But why <90 micron? Will much of it not end up as dust loss? I am more used to seeing much larger sizes for smelting operations.

Regards,

Ebe Neumann ■

Alumina

Erstellt am 17. Dec. 2004 - 10:01

The reason is that the material we are receiving is Already very fine and yes we are losing it as dust.

@$400.00 US a tonne this is considerable.....when you are talking of amounts around 2000 - 4000 tonnes per year

Many thanks ■

Knowledge , is simply what is waiting to be discovered and used.

Re: Alumina Powder Restructuring.is It Possible

Erstellt am 20. Dec. 2004 - 02:24

I do not think that it has to be that expensive. But I also do not know how much you can afford.

Ebe Neumann ■

Re: Alumina Powder Restructuring.is It Possible

Erstellt am 29. Dec. 2004 - 09:37

Probably by briquetting/compacting. I would need more information, e.g. bulk density, moisture. Material testing would be required also.

Regards ■