Address:
Glafo, Box 5157,
SE-350 05 Växjö
SWEDEN

Visitor's address:
Vejdes plats 3

Tel: +46 10 516 63 50
E-mail: info@glafo.se

You find a map at the
"about Glafo" page.

PELLETISING OF NON NITRATE BATCH (PR 438)

The project will develop a technique for pelletising batch with pentavalent antimony.

Background
The molten glass is refined to get rid of unwanted bubbles. This is done by adding something that will help the bubbles to rise and disappear from the melt before the prouction is started.

Refining is often achieved by a redox-reaction in which nitrate oxidises arsenic or antimony oxide. A disadvantage of using nitrate is that it decomposis to NO_x. This is the reason why it would be good to have an alternative to nitrate and thus diminish the emission of NO_x in the handmade glass inustry

Pelletising (making of small spheres) of the batch is done to improve the working conditions for the glass workers. They do not have to mix dusty (and sometimes unhealthy) glass ingredients at each separate factory. It is done in an almost enclosed system at a central pelletising unit, Glasma.

Pelletizing problems
Earlier investigations, for example PR181 showed that it is possible to use the already oxidised form of antimonate for refining and thus exclude nitrate. In the industry, the problem is that there is no existing procedure to pelletise this batch. The aim of this project is to solve the problems in the pelletising process for this batch.

CURRENT PROJECTS