1. Cleaning process: Use vibration cleaning sieve and magnetic selector to get better cleaning effect. And This step is mainly to clean the big impurities, like the stone, big dust, iron etc.
2. Crushing Process: This Process is mainly to crush the peanut, as the peanut is big ,it is not easy to press.We must crush the peanut to 6-8 pieces. Then we need to peel. The rate of peel is about 90% .
3. Flaking Process: After crush and peel,we need to flake the crushed peanut, which make the cell wall of peanut broken. And we flake the peanut to 0.55 mm thickness. Then it is useful for the oil extracting.
4. Cooking Process: After the flaker, we need to cook the flaked peanut, control the moisture at 5-7%, the temperature is 110-115degree .
5. Pre-pressing: After all the pretreatment, pre- press the peanut, the oil can be extracted about 76% .