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Soybean oil mill plant

Cracking, dehulling, extrusion and pre-pressing for soybean, specified around the solvent extraction plant the cake is going to rather than around the seed tonnage.

19%Oil content of the seed
One pressHow the presses are set up
9Machines for this crop
See the full process line
Soybean

Why this crop is different

Crushing Soybean

Soybean is the clearest case for pre-pressing rather than full pressing. Its oil content is low enough that a mechanical press alone leaves too much behind to be economic, so the press exists to take the easy oil out and hand a stable cake to a solvent extraction plant. That changes what you are buying: the press is one stage of a larger plant, specified around the extractor downstream, not a standalone mill.

  • Soybean is cracked and dehulled, then conditioned, before it is pre-pressed or extruded. Some plants extrude rather than press, to rupture the cell structure ahead of extraction.
  • If the press is feeding a solvent plant, tell us the extractor capacity rather than the seed tonnage — the pre-press is sized to it.

Process flow

How a soybean oil line works

Follow the seed from left to right. The numbers on the drawing match the steps below it, and every machine is explained in plain words.

Soybean is cracked and extruded instead of being cooked, then pressed once. The meal is broken up and cooled before bagging, and the oil is filtered and sent on for refining.

Soybean line: extruded, then pressedSoybean is cracked and extruded instead of being cooked, then pressed once. The meal is broken up and cooled before bagging, and the oil is filtered and sent on for refining.SOYBEAN1Seed cleaner2Destoner3CrackerClean and crack the seed4Extruder5Cooling screw conveyorExtrude and cool6Final pressDouble chamberOptiflow 30Squeeze out the oil7Hammer mill8Meal coolerBreak and cool the meal9Batch hopper and weighingmachine10Bagged mealWeigh and bag the mealMEAL11Vibro sifter12Paver chain conveyorSolids return to the press13Crude oil tankSeparate the oil from the solids14Filter press15Filtered oil tankFilter the oilOILTo storage andrefineryOil goes down to the oil sectionSeedCake / mealOilSteamIllustrative 3D views. Not to scale. Key machines shown. Conveyors and elevators are listed in the steps.Mahadev International© All rights reserved. oilseedmachinery.com
Swipe sideways to see the whole drawing.Open the full drawing

The line, step by step

Clean and crack the seed

Dust, straw and stones come out first, then the seed is cracked ready for the next stage.

  1. 1
    Seed cleaner

    Shakes the seed over screens to take out dust, straw and anything larger or smaller than the seed.

    Cyclone and blower: Sucks away the light dust and drops it in one place, keeping the air in the mill clean.

  2. 2
    Destoner

    Removes stones, which are the same size as seed but heavier. One stone can damage the press.

  3. 3
    Cracker

    Breaks the seed open between rollers, so the hard outer skin can come away from the soft kernel.

Moved between machines by: Bucket elevator, Screw conveyor

Extrude and cool

Soybean is extruded instead of being cooked in steam. The extruder opens up the seed in seconds, and a sloping screw carries it on while it cools.

  1. 4
    Extruder

    Squeezes and heats the cracked seed in seconds, opening up its structure so the oil comes out more easily.

  2. 5
    Cooling screw conveyor

    A long sloping screw that carries the hot material along while it cools down.

Squeeze out the oil

This is where seed becomes two products: oil, and a dry cake known as meal.

  1. 6
    Final press

    Oil expeller · Double chamber · Optiflow 30

    The heart of the mill. A turning screw squeezes the seed harder and harder until the oil runs out through narrow gaps, leaving a dry cake.

Moved between machines by: Screw conveyor, Bucket elevator

Break and cool the meal

The pressed cake comes out hot and in lumps. It is broken down and cooled so it can be bagged safely.

  1. 7
    Hammer mill

    Fast-spinning hammers break the pressed cake down into an even meal.

  2. 8
    Meal cooler

    A slowly turning drum with air drawn through it cools the warm meal, so it stores safely in bags.

Moved between machines by: Bucket elevator

Weigh and bag the meal

The meal is weighed into bags. It is valuable in its own right, usually as animal feed.

  1. 9
    Batch hopper and weighing machine

    Holds the meal and weighs out each batch into a bag.

  2. 10
    Bagged meal

    The pressed seed, sold as animal feed or sent on for further processing.

Separate the oil from the solids

Oil leaves the press cloudy with bits of seed, called foots. These are sifted out and sent back to the press, and the oil moves on.

  1. 11
    Vibro sifter

    The oil from the press is cloudy with bits of seed, called foots. This vibrating screen lets the oil through and holds the bits back.

  2. 12
    Paver chain conveyor

    Carries the wet bits caught by the sifter back up, so they go through the press again and their oil is not wasted.

    Solids return to the press

  3. 13
    Crude oil tank

    Holds the sifted oil until it is pumped to the filter.

Moved between machines by: Pump

Filter the oil

The oil is pushed through filters until it runs clear, then stored.

  1. 14
    Filter press

    Forces the oil through cloth-covered plates. The last fine solids stay on the cloth and clear oil comes out.

  2. 15
    Filtered oil tank

    Stores the clear oil after filtering.

Moved between machines by: Pump

The oil ends here: To storage and refinery

All process lines

The line

Machines for Soybean

Taken from the catalogue: every machine listed here is rated for this crop. General-purpose conveying, filtration and spares suit every line and are listed separately.

Oil expellers

Optiflow 40 screw press

Heavy-duty double-chamber screw press for multi-oilseed application

Crushing capacity10–11 TPD final press · 13–14 TPD pre-press
Motor power30 kW × 960 rpm
MustardGroundnutSoybeanSunflower
View details
Oil expellers

Optiflow 50 screw press

Heavy-duty double-chamber screw press for multi-oilseed application

Crushing capacity11–12 TPD final press · 14–15 TPD pre-press
Motor power50 HP × 960 rpm
MustardGroundnutSoybeanSunflower
View details
Seed cookers

Oilseed cooker

High-performance vertical-mounted seed conditioner

Capacity100 TPD (MCH-500) · 200 TPD (MCH-1000)
Motor power15 HP (MCH-500) · 30 HP (MCH-1000)
GroundnutSesameSunflowerMacadamia
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Expeller accessories

Crammer feeder

Smart feeding that prevents bridging in the feed hopper

FitsOptiflow presses and others on request
MustardGroundnutSoybeanSunflower
View details
Expeller accessories

Cake breaker

Better cooling, easy conveying and consistent packaging of cake

FitsOptiflow presses and others on request
MustardGroundnutSoybeanSunflower
View details
Extruders

Extruder

Conditioning efficiency, high throughput and low maintenance

CapacityOn request
SoybeanCottonseedMaize germ
View details
Seed cleaning and steam

Seed cracker

Cracking machine for hard oilseeds before pressing

Capacity10–50 tonnes per day
Roll materialChilled cast iron, grooved and balanced
SunflowerSoybeanCottonseed
View details
Seed cleaning and steam

Oilseed dehuller

Hull removal for higher protein and better oil quality

ApplicationOilseed dehulling
OperationContinuous hull separation
CottonseedSunflowerSoybean
View details

See the full catalogue · Spare parts finder

What it earns

What a Soybean line produces in a day

Set to soybean at 19% oil, the figure we publish for this crop. The tonnage, the hours and the three prices are yours to change — the rates shown are examples, not a quotation.

Oil content varies by seed, variety and growing region, so the figure above is only a typical starting point. Enter the number from your own lab report or purchase contract if you have one.

Prices are example rates; replace them with your local market prices. Machine capacity is rated per 24 hours.

Seed pressed11.5 tper day
Oil4,046 L3.70 t per day
Cake7.63 tper day
Oil sales₹607,000
Cake sales · 26% of sales₹214,000
Seed cost−₹713,000
Gross margin per day, before power and labour₹107,000
Per month · 25 working days₹2,684,000

Worked out from the three prices on the left, which are examples. Put your own in before you trust this figure.

The line this needs

StageDutyMachineUnits

Each machine is sized from the capacity we publish on its own page. Stages we do not publish a capacity for are sized to your layout.

Get a project proposal for this

Machine list, layout and power load for your numbers.

What an oil mill costs to set up

Where we deliver

Growing regions we supply

Most of our soybean enquiries come from Indore, Ujjain, Dewas, Latur and Nagpur. We quote and commission across India, and export through our Ludhiana works.

Madhya PradeshMaharashtraRajasthan

Tell us your Soybean capacity

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