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30TPH Rotary Sifter for Plasterboard
To design and manufacture a rotary sifter to screen 30tph of DSG (flue-gas desulphurisation gypsum).
Plaster is manufactured using either natural gypsum (mined or quarried) or from gypsum produced as a by-product of flue-gas desulphurisation gypsum (DSG) which is a cleaning process in use at a number of coal-fired power stations. The client secured DSG output from one of the UK’s largest Power Stations and required the system to reclaim the DSG product. The rotary sifter was required to remove ‘nibs’ (hard particles of limestone) from the dry DSG at a rate of 30 TPH, working in an ambient factory temperature of 45°C. The product had a dynamic bulk density of 948kg/m3, aerated bulk density of 843kg/m3 and a packed bulk density of 1198kg/m3 with a material temperature of 130°C. Dry DSG is very abrasive and takes on moisture.
After tests on a trial machine, GAME produced a sealed machine which included aspiration to manage the fine plaster particles. Attention had to be paid to the selection of suitable components and lubricants to cope with the temperature.
Feed to the machine was controlled via a rotary value under a silo and the speed through the machine could be varied.
The client utilised alternative sources of gypsum and were able to re-use pre-mined and pre-quarried products.» Return to previous page
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GAME Engineering Ltd
Witham St Hughs Business Park
Witham St Hughs, Lincoln.
LN6 9TW. ENGLAND
Tel: +44 (0)1522 868021
Fax: +44 (0)1522 868027