SPECIFIC ENERGY CONSUMPTION FOR REDUCING THE SIZE OF MAIZE GRAINS USING A HAMMER MILL

Ioan BUDĂCAN, Dumitru POP, Ioan DROCAŞ

Abstract


By measuring the energy requirement for grinding maize grains and by fitting the obtained data into Rittinger, Bond and Kick models, a decision can be taken about the reduction theoretical model that best fits the current process. Useful information can be obtained from this, in order to decide what would be the energy required for the grinding process based on the required dimension of the final particles, the moisture level of initial particles and based on the configuration of the hammers. Maize grains were milled using a hammer mill MB 7.5 (7.5 kW) with three sieve 4, 6 and 8 mm opening dimension. A direct relationship was drawn taking into account the specific grinding energy requirement and the hammer mill sieve opening dimension. The next step was to fit the data on specific grinding energy to Rittinger, Bond and Kick models. The results showed that the best fitted model with a coefficient of determination  was Rittinger model.

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References


ASABE Standards, Method of determining and expressing particle size of chopped forage materials by screening ANSI/ASABE S424.1. In: ASABE Standards 2006, American, 2006.

Budăcan, I., Drocaş, I., Pop, D., Influence of grains moisture content on milling parameters, Acta Technica Napocensis Nr. 56 Vol. 2, Cluj-Napoca, 2013.

Fellows, P.J., Food Processing Technology – Principles and Practice, Woodhead Publishing, Cambridge. pp 13–14, 2000.

Ghorbani, Z., Masoumi, A.A., Hemmat, A., Specific energy consumption for reducing the size of alfalfa chops using a hammer mill, biosy stems engineering 105, pp. 34 – 40, 2010.

Lopo, P., The right grinding solution for you: roll, horizontal or vertical, Feed Management, 53(3), pp. 23–26, 2002.

Mani, S., Tabil, L.G., Sokhansang, S., Grinding performance and physical properties of selected biomass, Biomass and Bioenergy, 27(4), pp. 339–352, 2004.

Manlu, Y.U., Womac, A.R., Miu, P.I., Igathinathance, C.I., Sokhansanj, S., Narayan, S., Direct energy measurement system for rotary biomass grinder–hammer mill, ASABE Annual International Meeting, Convention Center, Portland, Oregon. Paper no: 66217, 2006.

Mohsenin, N.N., Physical Properties of Plant and Animal Materials, Gordon and Breach Science Publishers, New York, 1986.

Samson, P., Duxbury, P., Drisdelle, M., Lapointe, C., Assessment of pelletized biofuels. Available at: http://reap.ca/Reports/ pelletaug2000.html, 2000.


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