Grain mills are an essential piece of equipment for commercial breweries, giving you the ability to purchase bulk grain and utilize the malt mill for milling when required. Using a malt mill not only allows you to keep your raw material costs down but using the grain as soon as crushed ensures the freshest flavors going into your mash and ultimately your final product.
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A malt mill (or malt grinder) is a critical piece of equipment in the beer brewing process. Its primary task is to crush malt into grist, preparing it for the subsequent mashing process.
The key to good milling is to maximize the crushing of the starchy endosperm (to improve sugar extraction) while preserving the malt husks as intact as possible. Intact husks form a natural filter bed during lautering, aiding in wort separation and reducing the extraction of tannins and other astringent compounds – preserving the beer’s flavor and clarity.
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| Type | Description | Feature | |
|---|---|---|---|
| Two-Roll Mill | Malt passes through a single pair of rolls. Most common for craft breweries. | Low cost, easy operation, good husk preservation | |
| Four/Six-Roll Mill | Malt passes through 2-3 sets of rolls. Common in large breweries. | Higher efficiency, handles poor quality malt | |