Compaction of potash into briquettes

A roller press system comprising:

• a first roller press defining a plurality of individual reliefs shaped and sized to compress feed material into a plurality of discrete briquettes;
• a second roller press defining a plurality of individual reliefs shaped and sized to compress feed material into a plurality of discrete briquettes;
• and
• an actuator mechanism configured to enable precision alignment of the first roller press relative to the second roller press, thereby enabling adjustment of a surface area to volume ratio of resultant briquettes;
• wherein each of the individual reliefs define a quadrilateral shaped depression having rounded corners to reduce stress concentrations in the resulting briquettes, wherein a pair of leading edge rounded corners are defined by a first radius and a pair of trailing edge rounded corners are defined by a second radius, the first radius being smaller than the second radius.

A roller press comprising:

• a roller face constructed of a high alloy, high-strength material defining a plurality of individual reliefs shaped and sized to compress feed material into a plurality of discrete briquettes;
• wherein each of the individual reliefs define a quadrilateral shaped depression having rounded corners to reduce stress concentrations in the resulting briquettes, wherein a pair of leading edge rounded corners are defined by a first radius and a pair of trailing edge rounded corners are defined by a second radius, the first radius being smaller than the second radius;
• and
• a base constructed of a low alloy, high-strength material, wherein the roller face is used directly to the base via a weld overlay for improved corrosion resistance and increased mechanical strength.