Grinding of coffee beans: grinding, grinding, grinding coffee beans grinding coffee beans grinding coffee coffee
Coffee beans are ground in three ways: grinding, grinding and mortar grinding.
1. Grinding:
It uses two rotating parts to squeeze and crush coffee beans. The abrasive member may be disc shaped or conical. Cone machines are less noisy and less likely to jam. The ground method produces coffee grounds that are more uniform and have a more consistent flavor when cooked. The conical disc design reduces the required rotational speed, typically below 500 rpm. The slower the grinding speed, the less heat generated by friction, so the aroma of coffee is not easy to lose. By adjusting the grinding parameters, the cone grinder can be used for a variety of coffee preparations. A better machine can grind the fine powder needed for Turkish coffee. Disc grinders generally rotate at higher speeds and generate more heat; however, they are versatile, economical and practical, and can be used for most household coffee preparations.
2. Polishing:
Most modern machines actually shred coffee beans at high speeds of 20,000 to 30,000 rpm (some simply use a beater). This type of blade sander has a longer life expectancy; however, the heat accumulated in the grinding and the size of the coffee powder produced are uneven, making it difficult to produce quality drinks. This type of sander can theoretically only be used for drip coffee pots. They produce dust that clogs filters in espresso and French press machines.
3. Mortar mill:
If you can't find good grinding equipment, then all you can do is use a pestle and a mortar, and enjoy the fun of labor slowly.
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The relationship between the Grinding degree of Coffee Powder and the method of extraction Coffee Grinding Turkish Copper Pot filter Paper dripping method
Suitable for fineness grinding Turkish copper pot (Ibrik, fine powder), mocha pot, espresso machine (very fine grinding). Suitable for medium grinding filter paper dripping method, flannel dripping method, plug air kettle. Suitable for roughness grinding water drop coffee machine (extreme roughness grinding), dripping filter pot (extreme roughness grinding)
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Why emphasize freshly ground coffee? Is the freshly ground coffee good? Why is freshly ground coffee so good?
If the diameter of the coffee powder is doubled, the volume of a single particle is reduced by 1 × 8, and the surface area of the corresponding total coffee powder is doubled. After the coffee bean is ground into coffee powder, its surface area increases exponentially, and the area of contact with air increases hundreds of times. The extremely important acidic and volatile fats in roasted coffee beans once exposed to air
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