PRODUCTIVITY IMPROVEMENT IN SCREW TYPE BIOMASS BRIQUETTING MACHINE BY IMPROVING MOULD LIFE
Keywords:
Briquetting, Wear Protection, Mould Life, BiomassAbstract
In this paper the details of the actual experiments done on a screw briquetting machine to improve the life of the mould by various process and the improvements obtained are discussed. The main difficulty faced by the users of screw briquetting technology is the frequent wear of the screw and the die (mould). The screw on normal conditions of operation has worn out in just 4 hrs in a 400 kg/hr capacity machine. On experimental conditions using various hard facing techniques up to 18 hrs of production for screw has been achieved. Many researchers are concentrating mainly on improving screw life. But the die also has severe wear problem but it is not given much priority. But actually the wear of die induces the faster wearing out of screw as the raw material flows back through the gap formed between the mould and screw and stops the production. There is a very high probability of improving the life of screw and the productivity by designing a better mould. From the experiments it was found that the usage of W2C coating on EN8 by the method of furnace bracing improves the life of the mould from 4 tons to more than 40 tons which is a 10 times improvement in productivity as for as the mould is concerned.
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