Real questions from oil mill owners and plant engineers — answered by the SinoOil technical team. Each answer links to the relevant seed preparation equipment.
Typical peanut roasting temperatures for oil pressing, why overheating darkens the oil, moisture targets, and how proper roasting
How long and how hot to roast sesame seeds before oil pressing: approximately 170°C for 15 minutes, hotter for aroma oils, plus ho
Electric vs gas/fired seed roaster: compare running costs by region, control precision, and induction options to choose the right
How a peanut shelling machine works: hopper feeding, rotor and concave screen cracking, fan separation of shells and kernels, plus
A good peanut sheller achieves a 95–98% shelling rate with 2–5% kernel breakage. Learn how moisture, nut grading, and screen match
Can you shell wet peanuts? Why 8–13% moisture is ideal for peanut shelling machines, what happens when nuts are too wet or too dry
Cut peanut kernel breakage to 2–5%: grade pods by size, match the screen, hold moisture at 8–13%, and tune feed rate and rotor spe
Shelling peanuts before pressing raises oil yield, protects your screw press from abrasive shell wear, and improves cake quality.
How to choose vibrating screen mesh size for oilseed cleaning: two-deck logic — scalping deck above seed size, sand deck below — f
How a vibrating screen cleans oilseeds: stacked perforated decks separate by size while airflow removes dust — protecting your pre
Linear vs circular vibrating screens for oilseeds: how the motion patterns differ, throughput vs separation precision, and which t
Why oily and moist seeds blind vibrating screen mesh — and how ball trays, correct mesh sizing, and feed moisture control keep oil
Stones, metal, and sand in oilseeds damage screw presses, darken crude oil, and raise FFA. Learn why seed cleaning before pressing
How clean must oilseeds be before pressing? Aim for roughly 1–2% total impurities, know what counts as foreign matter, and add a m
Magnetic separators remove ferrous metal; air-screen cleaners remove dust, stems and stones. Learn why oil mills install both in s
Oilseed pretreatment explained: cleaning, dehulling, crushing and roasting before pressing — why each step matters and how it rais
Which equipment belongs before an oil press: seed cleaner, sheller, crusher and roaster — and how shelling and roasting raise oil
Why oil mills heat-condition seeds before mechanical pressing: protein denaturation, cell-wall pores, easier oil release, better a
Yes — heat conditioning raises press recovery substantially. Published sesame research measured 33.5% improving to 62.6%. The mech
Cleaning, shelling and heat conditioning each add recoverable oil. Combined, pretreatment is often the difference between a strugg
Roughly 15-20 lb (7-9 kg) of shelled peanuts make one gallon of peanut oil with a screw press, depending on press efficiency and r
Around 45-55 lb (20-25 kg) of soybeans make one gallon of oil with mechanical pressing, because soybeans hold only 18-20% oil. The
