Grinder-mixer

– Grinder-Mixer Overview:
– Grinder-mixer processes livestock feed from grain.
– Portable mill combining mixing and grinding operations.
– Grinding improves feed digestibility, acceptability, mixing properties, and pelletability.
– Grain pulverized by hammer mills or roller mills.
– Roller mills involve cutting, attrition, and crushing with smooth or corrugated rolls.

– Hammermills in Grinder-Mixers:
– Impact grinders with swinging or stationary steel bars.
– Material reduced to screen size by hammers.
– Variables affecting grinding capacity include hammer size, arrangement, speed, wear patterns.
– Importance of clearance at the tip relative to screen or striking plate.
– Designated striking plate or circular screen for grinding.

– Roller Mills in Grinder-Mixers:
– Smooth or corrugated rolls for cutting, attrition, and crushing.
– Rolls rotating at the same speed at a set distance apart.
– Tearing action possible by operating rolls at different speeds.
– Different speeds for each roll for added tearing action.
– Combination of cutting, attrition, and crushing in roller mills.

– Feed Mixing Process:
– Mixing ingredients according to a formula.
– Objective is to maintain the original formula’s proportions.
– Process occurs in a vertical tank.
– Determines balanced nutritional quality of the feed.
– Feed mixing aims for uniformity in each small unit of the feed.

– Feed Processing and Delivery:
– Ground and mixed feed passes through particulate screens.
– Suitable granules proceed to delivery process.
– Waste directed to the charging chute.
– Particulate screens separate feed granules.
– Delivery process ensures only suitable granules are further processed.