FEED QUARTERLY: BATCHING AND MIXING SYSTEMS Most micro-systems use the self-contained feeders that feed a small batching scale hopper similar to the large batching system. in a formula may be very small. In this case, that ingredient may be hand added into the mixer. Another way to add small amounts is to blend the ingredient with a common carrier material such as ground corn. When this blend is used, the amount of ground corn in the blend at the ingredient inclusion rate is deducted from the amount of ground corn that is put in the main batching scale. ,QVRPHFDVHVLWLVGHVLUDEOHWRÀXVK the micro-ingredient system transfer conveyor to the mixer. This can be done by having a charge of ground corn spouted to an inlet to the conveyor mounted prior to the point where the ingredients are added. After the micro-ingredients in a formula have been transferred to the mixer, ground corn is passed through length of the transfer conveyor into the mixer. 7KHDPRXQWRIFRUQXVHGIRUÀXVKLQJ is deducted from the amount of ground corn put in the large batching scale. LIQUID ADDITION Two main liquids are used in the formulas: vegetable fat and molasses. Both are bought in bulk and added to the formula in the mixer. First, the dry ingredients and micro-ingredients are discharged into the mixer and blended together. This is called the dry mixing time. This is followed by the addition of the liquids into the mixer and are blended with the dry ingredients. This is called the wet mixing time. Both of these mixing activities must be completed within the cycle time allowed for mixing the formula. The liquids should be sprayed into the mixer through a manifold of properly sized spray nozzles. This allows for multiple liquid addition points along the length of the mixing chamber. The liquids are sprayed into the mixer through a manifold that has multiple branches that spray the liquids into the length of the mixing area. The spray heads in the mixer must be located so the liquid is added directly into the mix and not directly on to any mixer surface. 48 August 2019 / World Grain / www.World-Grain.comhttp://www.yenar.com.tr http://www.facebook.com/YenarMachine http://www.youtube.com/YenarMachine http://www.World-Grain.com