Bean milling is a post-harvest process to prepare beans for consumption or further processing, involving steps like cleaning, peeling, grading, dehulling, and finally, grinding into flour or flour-like products. While different beans have unique processing needs, the core process often includes sorting, hulling to remove outer layers, size and density grading, and then milling to reduce particle size for specific products like flour or grits.
Cleaning: The first step is to remove impurities like stones, dust, and foreign materials from the raw beans.
Color Sorting: Optical sorters are used to identify and remove beans with color defects or foreign objects.
Peeling/Dehulling: The outer layers of the bean, such as the hull or husk, are removed using specialized machines that minimize damage to the kernel.
Grading: Beans are sorted based on size, shape, and density to ensure uniformity.
Milling: The cleaned, graded beans are then milled into desired products, like flour or grits.
Packaging: The final products are packaged for storage and distribution.
Milling into Bean Flour: Beans are ground into a fine powder using professional bean grinders or centrifugal mills.
Kernel and Grits Milling: Beans can be processed to produce kernels or grits by making and milling.
Cleaning and Grading Machines: Used for initial impurity removal and for sorting beans by size and shape.
Peeling/Hulling Machines: Specialized machines, such as the DRHG Pulsroll, are designed to remove the outer shells of pulses with minimal breakage.
Milling Equipment: Includes centrifugal mills, disk mills, and hammer mills, which use impact, shear, and abrasion forces to reduce beans to flour.
Optical Sorters: Use advanced technology to detect and remove subtle defects based on color, shape, and other visual cues.
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