Compaction of potash into briquettes

Patent metadata

Field	Value
Publication number	US-12552123-B2
Application number	US-202218546569-A
Country	US
Kind code	B2
Filing date	Feb 15, 2022
Priority date	Feb 15, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A roller press comprising including a roller face defining a plurality of individual reliefs shaped and sized to compress feed material into a plurality of discrete briquettes, each of the individual reliefs defining 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.

First claim

What is claimed is:

1 . A roller press comprising:
a roller face defining a plurality of individual reliefs shaped and sized to compress feed material into a plurality of discrete briquettes, each of the individual reliefs defining 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.

2 . The roller press of claim 1 , wherein the quadrilateral shaped depression of each of the individual reliefs has a first length along a rotational direction, and a second length along an axial direction.

3 . The roller press of claim 2 , wherein the first length along the rotational direction has a dimension in a range between about 0.5 inches and about 2 inches.

4 . The roller press of claim 3 , wherein the first length has a dimension of about 1.5 inches.

5 . The roller press of claim 2 , wherein the second length along the axial direction has a dimension in a range between about 0.5 inches and about 2 inches.

6 . The roller press of claim 3 , wherein the second length has a dimension of about 1.7 inches.

7 . The roller press of claim 2 , wherein the second length has a larger dimension than the first length.

8 . The roller press of claim 1 , wherein the roller face further defines one or more lands positioned between the plurality of individual reliefs.

9 . The roller press of claim 8 , wherein the one or more lands have a width has a dimension in a range of between about 0.05 inches and about 0.1 inches.

10 . The roller press of claim 9 , wherein the one or more lands has a dimension of about 0.075 inches.

11 . The roller press of claim 1 , wherein the plurality of individual reliefs generally form a spiral pattern around the roller face.

12 . The roller press of claim 1 , wherein every third individual relief along an axial direction of the roller face is aligned.

13 . 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.

14 . The roller press of claim 13 , wherein the plurality of individual reliefs generally form a spiral pattern around the roller face.

15 . The roller press of claim 13 , wherein every third individual relief along an axial direction of the roller face is aligned.

16 . 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.

17 . The roller press of claim 16 , wherein the plurality of individual reliefs generally form a spiral pattern around the roller face.

18 . The roller press of claim 16 , wherein every third individual relief along an axial direction of the roller face is aligned.

Assignees

• Mosaic Co

Inventors

• Jordison David
• Rinas Kimberly

Classifications

• B30B11/165 Primary

  Roll constructions · CPC title