[Gasification] Re: Gasification Digest, Vol 22, Issue 19

[Jeff Davis]

Dear Ananda,

I re-posted your e-mail under the below subject:
Rice Husk Ash for Cement

Some people could miss your good question if the subject is missing.

Jeff

On Monday 15 May 2006 10:30 pm, Ananda Weerakkody wrote:
> Dear friends,
>                        Can some body please advise me on the following
> matter.
>
>    I have done heat generation using Rice Husk. Also I have seen large
> scale Power generation through rice husk. Most of the ash generated is a
> waste, good only for land-fil. But very few places like in Malaysia produce
> rise husk ash which can be used as additive in Cement production. I asked
> some experts about this and they too did not know details. One day I saw
> the reason for this, in one conversation in this forum. It said the ash
> made under 800 degrees Centigrade contains Silica in unmelted form and that
> can be used instead of PFA (Pulverised Fuel Ash) in cement making. In some
> places people already mix rise husk ash in making Hollow Cement Blocks.
> Thereby reducing the cost of production. But what I know is around 700-800
> degrees Centigrade  Rice husk is still in Carbonised form not turned to ash
> completely. May some body please advice me as to how to make Rice Husk Ash
> with Silica in unmelted form? This would be a great help. I am a Civil
> Engineer and QA adviser engaged in rural development, helping poor
> communities in Philippines and SriLanka on voluntary basis. Thank you,
>   Ananda


-- 
Jeff Davis
Somewhere 20 miles south of Lake Erie, USA
http://www.velocity.net/~jeff0124