Corn oil milling machinery
Unlike almost other vegetable oils, corn oil is obtained from the seed that contained 3%-5% oil. the maize germ accounted for about 6% to 7% of the corn granule.
According to the different maize varieties andmaturities ,oil percentage is differernt too, usually it can reach 30%~48%
Method of germ extraction mainly half wet, dry.
Hydrometallurgy of embryo is the corn immersion, so as to achieve the purpose of embryo and starch separation, embryo extracting rate of 85% a 95% of the act, germ moisture content as high as 60%, oil content of up to 44% 50%.
dry germ extraction without water regulating on Maize by mechanical method, but the corn and wheat germ separation.
Half wet extracting embryo of maize is moistening to a moisture content of 16% - 20%, and then by peeling, crushing and extracting embryo, the embryo extraction efficiency can reach 85%
Corn oil rotocel extractor process features
1. Adopt stainless steel fixed grid plate and increase the horizontal grid plates, which can prevent the strong miscella from flowing back to the blanking case, so as to ensure good extraction effect;
2. The rotocel extractor is driven by rack, with unique rotor of balanced design, low rotating speed, low power, smooth operation, no noise and quite low maintenance cost;
3. The feeding system can adjust the rotating speed of airlock and main engine according to the feeding quantity and maintain a certain material level, which is beneficial to the micro negative pressure inside the extractor and reduce the solvent leakage.
4. The advanced miscella circulation process is designed to reduce the fresh solvent inputs, reduce the residual oil in meal, improve the miscella concentration and save energy by reducing the evaporation capacity.
5. The high material layer of the extractor helps to form immersion extraction, reduce the meal quality in miscella, improve the quality of crude oil and reduce the evaporation system scaling.
6. Specially suitable for the extraction of various pre-pressed meals.
Main Economic and Technical Parameters of Rotocel Extractor
(take 500T corn germ extraction as an example)
Capacity |
500T/D |
Residual oil in meal |
≤ 1% (corn germ meal) |
Solvent consumption |
≤ 2Kg/T (No.6 solvent oil) |
Crude oil moisture and volatile matter |
≤ 0.30% |
Power consumption |
≤ 15KWh/T |
Steam consumption |
≤ 280KG/T (0.8MPa) |
Finished meal moisture |
≤ 13% (adjustable) |
Residual solvent in finished meal |
≤300PPM (qualified detonated experiment) |
Corn oil Towline Extractor Process Features
1) The material is divided into several independent units on the material bed, which can effectively prevent miscella at all levels from fleeing hither and thither on the material layer and ensure the concentration gradient between several sprays.
2) Immersion area appears in each lattice, which can help achieve better immersion effect.
3) The chain box is supported by track and can prolong the service life of screen deck by not touching it.
4) The towline extractor is driven by world leading double-shaft hydraulic motor, with balance force, reliable operation and less maintenance cost.
5) Specialty suitable for the extraction of high oil and high power materials, and better immersion effect can be expected for ordinary oil plants.
Main Economic and Technical Parameters of towline extractor
(take 500T/D corn germ as an example)
Steam consumption |
≤ 280kg/t |
Power consumption |
installed capacity 320KW |
Solvent consumption |
≤ 4kg/t (No.6 solvent) |
Residual oil in meal |
≤ 1.0% |
Moisture in meal |
12~13% (adjustable) |
Solvent in meal |
≤ 500ppm |
Urase activity |
0.05-0.25 |
Total volatile matter |
≤ 0.3% |
Residual solvent |
≤ 300ppm |
Mechanical impurities |
≤ 0.2% |
Corn oil refining machine:
1.Deacidification
Sodium hydroxide antagonize free fatty acids,and subside phospholipids,to remove the insoluble impurities,then after the separation of soapstock, neutral oil was washed in soft water,last drying in vacuum.
2.Decoloration
Corn oil pigments in two categories: one is the natural pigment, such as the carotenoids lutein materials such as chlorophyll, these are easy to bleach,and the other type of the products of organic matter, these pigments are not easy to be bleached.
3.Dewaxing
Dewaxing can ensure the colour of corn oil to be clear bright at room temperature and frozen temperature. to reduce the oil in the wax content to 10 parts per million to get crystal clear oil.
4.Deodorization
Using high temperature and high vacuum steam stripping method deodorization temperature commonly 180, vacuum degree 9.3 104 Pa can achieve ideal results
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