Can rice bran oil be squeezed?
It is possible, but it is conditional. First, the purity of the rice bran should be high. It is best to obtain the rice bran after the separation of the rice bran, because if it is mixed with broken rice, a large amount of starch in the broken rice will gelatinize and stick when the dough is steamed, and the oil yield during pressing is great decrease;
second, the raw materials should be fresh, because the rice bran is easy to rancid, and the quality of the oil squeezed from the rancid rice bran is relatively poor; third, it is necessary to add steaming and frying equipment, because the rice bran will easily stick to the snails of the oil press Above, it affects the oil production rate, and it is difficult to clean up later. If the above conditions are met, rice bran can be squeezed out of oil. Below, Henan Huatai Oil Machinery will briefly introduce you the process of rice bran oil pressing.
Rice bran oil pressing process:
Separation of bran and rice bran – get pure rice bran – mix with rice husk – add water – steam embryos – fried embryos – squeeze – rice bran oil
1. Separation of chaff
The purpose of bran separation is to remove broken rice and impurities in the rice bran to ensure the oil yield. Generally, a small square sieve for bran separation is used for screening. If it is a small output rice bran oil press workshop, it is best to buy pure rice bran, so you don’t need to buy a rice bran separator.
2. Mixed with rice husk
The rice bran is mixed with 4.5% to 5% of the shell, which can increase the hardness of the billet, and the steam can easily pass through when the billet is steamed, and the billet can eat evenly. After mixing the rice husk, stir evenly.
3. Add water
In order to get gas easily when steaming the billets, water should be added appropriately. When the water content of rice bran is 11%-12%, 20% water is generally added. Add water evenly to make the rice bran looser.
4. Steamed billets
The purpose of the steamed dough is to soften the crude fiber in the rice bran, protein aggregation, cell rupture, and fine oil droplets to gather into larger oil droplets, which is convenient for squeezing out the oil.
5. Fried billets
The function of frying billet is to reduce the moisture content of the billet so that the moisture and temperature of the billet meet the requirements of pressing.
When the billets are fed into the rice bran oil squeezing equipment, the temperature should be kept between 80°C and 90°C. When the machine is turned on for the first time, feed slowly, and then gradually increase the feed rate after the press chamber heats up. When squeezing, the slag between the sliver gaps should be mixed into the billet at any time for re-squeezing.
Crude rice bran oil is obtained by squeezing, and it will also enter the refining workshop for refining and dewaxing. The pressed cake still contains 6-7% residual oil. If the amount of raw material is small, this part of the oil can be ignored, but if the daily processing is more than 30 tons, the pressing method will lose a lot of oil.
Our engineers recommended to use the puffing-leaching method to produce rice bran oil, and the residual oil rate can be controlled below 1%. Whether you want to produce pressed rice bran oil or leached rice bran oil, you can contact us. Engineers can customize the process and equipment for you according to your specific needs.
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