Grinding apparatus

An apparatus for grinding bulk material comprising:

• a material processing component comprising:
• a cylinder defining a horizontally disposed stationary working area, the cylinder comprising an input end and an output end;
• a rotatable shaft penetrating the cylinder along an axis of the working area;
• a housing surrounding the cylinder forming a watertight cooling compartment separating the housing from the cylinder configured to accept running water to cool the cylinder;
• and
• a plurality of replaceable rods mounted to and extending from the rotatable shaft oriented in a helical line;
• and
• a bulk material input feeding the material processing component;
• an outlet in the output end of the cylinder;
• and
• wherein a lead size of the helical line decreases by up to 50 percent along the shaft between the input and output ends;
• and wherein only a last three of the plurality of working bodies closest to the output end are situated in a plane perpendicular to an axis of the shaft.

An apparatus for rotationally grinding bulk material comprising:

• a material processing component comprising:
• a cylinder defining a horizontally disposed stationary working area, the cylinder comprising an input end and an output end;
• a metering device for controlling an input of a material into the cylinder;
• a rotatable shaft penetrating the cylinder along an axis of the working area;
• a housing surrounding the cylinder forming a watertight cooling compartment separating the housing from the cylinder configured to accept running water to cool the cylinder;
• and
• a plurality of replaceable rods mounted to and extending from the rotatable shaft oriented in a two or three-helical line with a decreasing lead size and a decreasing gap between each of the replaceable rods from the input end to the output end;
• and
• a bulk material input feeding the cylinder at the input end;
• an outlet in the output end of the cylinder;
• and
• a motor in communication with the rotatable shaft via a drivebelt;
• and
• wherein the gap between each of the replaceable rods decreases by up to 50 percent between the input and output ends;
• and
• wherein the lead size of the helical line decreases by up to 50 percent along the rotatable shaft between the input and output ends;
• and
• wherein only a last three of the plurality of replaceable rods closest to the output end are situated in a plane perpendicular to an axis of the shaft.