تقييم أداء المطحنة Buhler ag 200 ton و تأثير بعض التغييرات الآلية في زيادة طاقتها الإنتاجية

الملخص EN

conducted in 2011 to evaluate the performance of mill Buhler ag 200 ton ; and the effect of some mechanical changes on its capacity .

The mill belongs to Ministry of Trade \ general company of grain processing , it is running by computer and considers as a developing mill with capacity 200 ton\hour .

The mill used to offer the need of the flour in a Alanbar province as a ration card .

This mill is consist of three parts , the first is cleaning and dumping , second part is milling and the third is packing .

The milling part is the most important because it is responsible of changing the wheat into flour and bran with an ability of increase or decrease the extraction rate , and deliver it to special silos .

Milling section has 11 roll mill cylinders , 2 plan sifter , 3 bran finishers , and 5 detachers in addition to high presser fan system used to transfer the wheat components from the lower floor to the upper floor and distribute it on all parts of the milling machine .

In this experiment was used mixed wheat , 50% local wheat , 30% American wheat and 20% Australian wheat , and the moisture content of wheat grain when reached the milling department was 16% .

It was studied some technical performance that could be an indicators of the mill performance , and they are the mill capacity , mill extraction rate and also tow of the important specification of flour , and they are flour degree of granulation and final moisture content of flour .

The experiment was done under the complete randomize design with three replication .

The research studied two factors , first is clearance of first brake rolls with three levels 0.5 , 0.6 , 0.7 mm , and second is flour sieves diameter with two levels 132 , 280 micron .

The 0.5 mm first brake rolls clearance and 280 micron flour sieves diameter was superior in getting high capacity(8.816) , high mill extraction rate (%81.09) and high moisture content of flour (%14.02) while the 0.5 mm first brake rolls clearance and 132 micron flour sieves diameter was superior in getting a high flour degree of granulation (%0.60) .

We recommend to work at 0.5 mm clearance of first brake rolls and 280 micron flour sieves diameter to get high mill capacity , high mill extraction rate and high moisture content of flour .