DE102009032931A1 - Waste-free processing extraction meal from sunflower seed, comprises separating the meal into first fraction with high raw protein- and low raw fiber content and second fraction with low raw protein- and high raw fiber content by sieving - Google Patents

Abstract

The method comprises separating an extraction meal into a first fraction with high raw protein content and low raw fiber content and a second fraction with low raw protein content and high raw fiber content by uniquely sieving and then uniquely air sifting. The extraction meal is initially subjected to two-step coarse sieving, in which the coarse particles of the extraction meal that do not undergo the coarse sieving are directly slammed to the second fraction and in which the fine particles of the extraction meal that undergo the coarse sieving are subjected to a multi-step fine sieving. The method comprises separating an extraction meal into a first fraction with high raw protein content and low raw fiber content and a second fraction with low raw protein content and high raw fiber content by uniquely sieving and then uniquely air sifting. The extraction meal is initially subjected to two-step coarse sieving, in which the coarse particles of the extraction meal that do not undergo the coarse sieving are directly slammed to the second fraction and in which the fine particles of the extraction meal that undergo the coarse sieving are subjected to a multi-step fine sieving according to the grain sizes. In the multi-step fine sieving, the particles are separated into grain size fractions and subsequently each of the grain size fractions is separately subjected to air sifting, in which the grain size fraction is separated into specific light- and specific heavy particles and then the specific light particles of all grain size fractions are slammed to the second fraction and the specific heavy particles are slammed to the first fraction. Before the coarse sieving, a multi-step pre-sieving of the extraction meal is carried out, in which the coarse particles of extraction meal that do not undergo the pre-sieving are subjected to a mechanical crushing and then led to the pre-sieving and in which the fine particles that do not undergo the pre-sieving are led to the fine-sieving. The particles of the extraction meal undergoing the coarse sieving and/or pre-sieving are milled before fine-sieving. The fine-sieving is carried out in four-step with successive sieve widths of the sieve steps of 1300 mu m, 800 mu m, 500 mu m and 300 mu m. The coarse-sieving is carried out with two successive sieve widths of the sieve steps of 2500 mu m and 1750 mu m. The pre-sieving is carried out with two successive sieve widths of the sieve steps of 3000 mu m and 1750 mu m. The first and second fractions are continuously discharged over separate belt weighers. The extraction meal passes through a magnet separator for separating metallic impurities before the coarse sieving and/or pre-sieving, and passes through a lump breaker (30) for dissolving lumps before the coarse sieving and/or pre-sieving. The first and/or second fractions are processed to pellets. An independent claim is included for a system for waste-free processing of extraction meal from sunflower seeds.

Description

The The invention relates to a method for the waste-free treatment of Extraction meal from sunflower seed, in which the extraction meal at least once by sieving and then once Air classification in a first fraction with high crude protein and low Crude fiber content and in a second fraction with low crude protein and high crude fiber content is separated.

The The invention also relates to a corresponding plant for waste-free Preparation of extraction meal from sunflower seed, comprising a feeder for the extraction meal, at least a screening device connected to the feeding device and at least one of the screening device downstream air classifier and two Collecting devices for the at least one screening device and the at least one air classifier passing through extraction shot, wherein a collector of the collection of a first fraction the extraction meal with high crude protein and low crude fiber content is used and the other collector of the collection of a second fraction the extraction meal with low crude protein and high crude fiber content serves.

Such methods and systems are known, including on the EP 1 372 409 B1 is referenced.

The after the known process and the plant processed extraction shot from sunflower seed is present in two fractions, with the first fraction, which consists mainly of core parts of the sunflower seed consists of particularly high crude protein and low crude fiber content which makes this group an extraordinary one high quality pet food for monogastric, for example Poultry and pigs can be.

The In addition, the second fraction obtained predominantly comprises Shell parts and is characterized by low crude protein content at the same time high crude fiber content, what this fraction too a very suitable animal feed for ruminants, like dairy cows, beef cattle, sheep and goats. Also It is possible to use this second high fiber content and low crude protein content, especially when It is solidified into pellets, as a combustible energy source example, as a substitute for the younger in Time to serve more to serve coming wood pellets can and in comparison to just these wood pellets by lower Residual moisture content and higher calorific value at constant Composition and thus uniform product quality distinguished.

The However, known methods and the known system still leave Room for improvements in the accuracy of the Separation of serving as a raw material extraction shot from Sunflower seed, which is a by-product in the sunflower seed processing oil mill is obtained.

in this respect It is an object of the invention, starting from the known methods and systems a method and a system of the aforementioned To propose way, by means of which an even more accurate separation of the raw material extraction meal from sunflower seed into two fractions is effectable, whereby the first fraction high Crude protein and low crude fiber content and the second fraction low Rohprotein- and high crude fiber content has. After how before this separation waste is going to be effected los, d. H. to the separation of serving as starting material extraction meal in the two fractions mentioned fall no further residues of the extraction meal more.

These Object is according to the invention with a method and a plant according to the independent ones Claims 1 and 12, respectively. Advantageous embodiments and further education are the subject of the respective dependent Claims.

Of the inventive proposal is based, the Process for the waste-free treatment of extraction meal Sunflower seeds in such a way that the extraction meal initially subjected to at least one-stage coarse screening where the coarser particles of the extraction shot, which do not pass the grossing, immediately the second Fraction and the finer particles of the extraction meal, which pass the gross sifting, following a multilevel fine sifting Be subjected to particle sizes at which the particles be separated into several particle size fractions and subsequently each of these grain size fractions is subjected separately to an air classification, in the grain size fraction separated into specific lighter and specific heavy particles and then the specific lighter particles of all grain size fractions of the second fraction and the specific heavy particles of the first Be added to the faction.

in this respect proposes the invention, the discontinued extraction meal first in several successive stages through Pre-classify screenings by particle size fractions and only then all the obtained grain size fractions with the exception of the very rough and already attributed to the second fraction Grain size fractions of an air classification, d. H. to be fed to a separation according to the specific weight. This has the advantage that each used for this purpose Wind sifter in their mode of operation and design exactly to the supplied Grain size fraction are matched, what the air classification result and thus ultimately the accuracy of the separation of the extraction meal significantly improved in the two fractions.

To A proposal of the invention is an at least two-stage coarse screening of the extraction meal, all of which Parts of the extraction meal, this at least two-stage coarse screening not happen, be added directly to the second fraction.

To Another proposal of the invention may be prior to coarse screening a pre-screening of the extraction meal is carried out, in the coarser particles, which do not pass the pre-screening, initially a mechanical comminution and structuring subjected to pre-screening. As a result, in particular larger Clumps in the extraction shot and particularly coarse particles be resolved in the following in the pre-screening exactly to be classified. Besides, at the mechanical Crushing peeled adhering to the shells core parts. The finer particles that pass the pre-screening need no longer supplied to the coarse screening according to this proposal of the invention but can be directly fed to fine screening become. In this way, the quantity is also Reduced burden of coarse screening, as only those parts of the Extraction meal can be fed to the coarse screening, the previously due to their reluctance in pre-screening the have undergone mechanical comminution.

To A further proposal of the invention can also be provided the coarse screening and / or pre - screening particles of the To further fractionate the extraction meal before the fine screening, in particular by a crushing of the parts before feeding into the fine sieve can be effected.

All proposed in the context of the method according to the invention Screening steps, namely pre-screening, coarse screening and fine screening be carried out in one or more stages depending on the application.

To a proposal of the invention, the fine screening with four stages successive sieve widths of the individual screening stages of 1300 μm, 800 microns, 500 microns and 300 microns performed.

To Another proposal of the invention, the coarse screening with two consecutive sieve widths of the screening stages of 2500 μm and 1750 microns are performed.

Also the pre-screening is according to a proposal of the invention with two successive sieve widths of 3000 μm and 1750 μm carried out.

Around a continuous quality control and also quantity control to ensure the obtained first and second fraction it is also proposed that the first and second Fraction continuously discharged via separate belt cars ensure continuous control of both groups.

About that In addition, it can be provided that the extraction meal before the Preliminary or coarse screening a magnetic separator for depositing metallic Passes through impurities.

Also the extraction meal can be a lump breaker before roughing or coarse screening go through to the serving as starting material extraction shot to structure and coarser clumps z. In the silo storage may arise to dissolve.

After all can in the context of the method according to the invention still be provided that the first and / or second fraction too Pellets are processed, which is especially true at the second Offers if these as renewable energy sources should be used.

The pelleting can be carried out in suitable pellet presses. Preference is given to pellet diameter 3-8 mm at a Pelletierpressverhältnis of about 1: 4 based on the output receive product.

The proposed in the invention plant for waste-free treatment of extraction meal from sunflowerseed is characterized from that of the task device downstream of a first screening device intended for the extraction meal, in which a coarse sieving the extraction meal is feasible, the in The coarse particles retained by the first screening device the extraction meal directly to the collecting device for the second fraction can be fed and the first screening device a second screening device is arranged downstream, the more in the Sieving fineness Increasing screening stages for the extraction meal comprising, wherein the second screening device with the first Sieve device is connected to that of the first screening device passing particles of the extraction meal beauf beatable and each screening stage of the second screening device a separate air classifier associated with those that do not pass the assigned screening stage Particles of the extraction meal can be acted upon. Further is another with the all screening stages of the second screening device Passing particles of the extraction meal acted upon air classifier provided and the upper output of all air classifier for the specific lighter particles is with the collector for the second fraction and the lower output of all air classifiers for the specific heavier particles is with the collector connected for the first fraction.

To A proposal of the invention comprises the first screening device at least two sieving stages increasing in the sieve fineness, the according to another proposal of the invention, sieve widths of 2,500 microns and 1,750 microns.

To Another proposal of the invention is in front of the first screening device a Vorsiebstation provided with a downstream mill and the mill is with those particles of the extraction meal acted upon, which do not pass the Vorsiebstation. A bypass line serves between the Vorsiebstation and the second screening device to those particles directly bypassing the first screening device the second screening device, which the Vorsiebstation happen. The aforementioned mill may preferably be used as impact impact mill be formed, which for the dissolution of clumps and coarse Materialanhaftungen a crushing of the supplied Extraction meal by direct impact with a striking mechanism and impact of the particles machined on the mill wall. Here, core parts adhering to shell parts are separated.

To Another proposal of the invention may be one of the second screening device upstream mill to be provided, which is the second Screen to be supplied extraction shot on crushed. This mill can be used as a hammer mill be educated.

To According to a further proposal of the invention, the pre-screening station can have several For example, in the Siebfeinheit ascend screening stages Have screen widths of 3,000 μm and 1,750 μm.

Also the second screening device is according to a proposal of the invention formed multi-level, in particular, it comprises four consecutive following screening stages with screen widths of 1,300 μm, 800 μm, 500 μm and 300 μm.

to continuous quality and process control can the first and second collecting device each a feeder belt be assigned and the task device can avoid metallic impurities include a magnetic separator.

The Feeding device can also serve as a lump breaker Mill, z. B. one with fixed rackets equipped hammer mill include. The lump breaker crushes any in the sunflower extraction meal, z. During formed a Silobevorratung coarse lumps and causes a first Structuring the sunflower extraction meal by adding large Shell parts already crushed and detached adhering core parts become.

Provided desired, in addition, pelleting presses be provided for the first and / or second fraction.

The in the context of the above-explained invention Plant and process processed extraction meal from sunflower seed is split into two fractions, namely a first one High crude protein and low crude fiber fraction a second fraction with low crude protein and high crude fiber content.

in the The scope of the invention is provided, the first fraction in particular as animal feed for monogastric use while the second fraction as animal feed for ruminants or as a renewable energy source use Can be found.

Further Embodiments and details of the invention are described below on the basis of an embodiment illustrative drawing explained in more detail.

The 1 to 3 show here a schematic plant diagram and continue on each other.

Of the Structure of the apparent from the figures attachment will be below successively explained in the passage direction.

About one of the 1 ersichtlichen inlet E reaches extraction meal from sunflower seed, which is a by-product of sunflower seed processing oil mills and mainly covers shells, core parts and adhering to the shells core parts of sunflower seed, a hopper 1 supplied in the form of a silo. From there, the extraction meal passes through a dosing screw 2 and a downstream feeder, preferably equipped with frequency control 3 , a lump breaker 30 and a metal separator 4 via a high-performance elevator 5 to a Vorsiebstation 7 ,

Consequently, the pre-tank 1 with downstream dosing screw 2 , Weighfeeder 3 , Lump breaker 30 , Metal separator 4 and the high-performance elevator 5 It is recognized that the Hochleistungselevator. The globally denoted by reference numeral A task device for the extraction 5 in the illustrated embodiment has two enemas, as well as a likewise the task device A associated task pipe screw conveyor 6 may additionally be provided to bring extraction shot into the plant.

The lump breaker 30 For example, is formed by a hammer mill with fixed rackets whose drive and thus their performance is variably adjustable.

In the lump breaker 30 If any clumps are broken and dissolved, at the same time the extraction meal undergoes a first structuring by crushing large shells and detaching adhering cores.

After exiting the high-performance elevator 5 As already explained, the extraction shot first reaches the pre-screening station 7 , which two consecutive screening stages 7.1 . 7.2 includes. The first screening stage 7.1 has, for example, a Siebmaschenweite of 3,000 microns, while the second screening stage 7.2 has a Siebmaschenweite of 1750 microns.

All those parts of the fed extraction meal, either the screening stage 7.1 or the screening level 7.2 not happen, ie in the example presented all those parts with a grain size of about 3,000 microns from the screening stage 7.1 or a grain size between 3,000 microns and 1,750 microns from the screening stage 7.2 be from the Vorsiebstation 7 in a downstream impact-baffle mill 10 introduced, which mechanically comminutes the supplied coarse parts of the extraction meal and separates the coarse shell parts of the core parts and subsequently a first screening device 8th feeds which three sieve levels increasing in the sieve fineness 8.1 . 8.2 and 8.3 includes. In the illustrated embodiment, the screening stage 8.1 a Siebmaschenweite of 2,500 microns and the screening stage 8.2 a Siebmaschenweite of 1,750 microns on.

All those parts of the supplied extraction meal, which are the screening stages 8.1 or 8.2 the first screening device 8th do not happen, ie parts with a grain size greater than 2,500 microns in the screening stage 8.1 or parts with a particle size between 2,500 μm and 1,750 μm in the screening stage 8.2 be immediately over the line 180 eliminated from the process and in the manner described in more detail below an elevator 18 supplied, which supplies these parts in the manner described below on other parts of the plant II for the second fraction with low Rohprotein- and high crude fiber content, see 3 ,

All those parts of the extraction meal containing the first screening device 8th happen, ie have a particle size smaller than 1,750 microns, get into a reference numeral 11 characterized hammer mill for further fractionation. In the hammer mill 11 Are the possibly still adhering to the fine core parts fine shell parts detached. Further, this hammer mill 11 also those parts of the Extraction meal fed to the Vorsiebstation 7 have happened, ie already there have a particle size smaller than 1750 microns, so they the screening stage 7.2 , could happen. Namely, these parts are bypassing the first screening device 8th via a bypass line BP directly the hammer mill 11 fed.

After further comminution and fractionation in the hammer mill 11 The thus processed parts of the extraction meal then enter the second screening device 9 , which has a total of four sieving steps increasing in the screening fineness 9.1 . 9.2 . 9.3 and 9.4 includes. In the selected embodiment, the sieve widths of the individual screening stages are selected as follows: first screening stage 9.1 : 1,300 μm second screening stage 9.2 .: 800 μm third screening stage 9.3 : 500 μm and fourth screening stage 9.4 : 300 μm.

The first screening stage 9.1 non-passing particles of the extraction shot, which accordingly must have a particle size between 1750 microns and 1300 microns, one with reference numeral 12 labeled zigzag wind sifter supplied.

The first screening stage 9.1 passing, but in the second screening stage 9.2 Retained particles of the extraction shot, which must therefore have a particle size between 1300 microns and 800 microns, one with reference numeral 13 labeled zigzag wind sifter supplied.

The second screening stage 9.2 passing, but in the third screening stage 9.3 Retained particles of the extraction shot, which must therefore have a particle size between 800 microns and 500 microns, one with reference numeral 16 marked typhoon wind sifter supplied.

The third screening stage 9.3 passing, but in the fourth screening stage 9.4 Retained particles of the extraction shot, which must therefore have a particle size between 500 microns and 300 microns, one with reference numeral 14 supplied separating table air classifier and all the screening stages 9.1 to 9.4 passing particles of the extraction meal, which accordingly have a particle size of less than 300 microns, one with reference numeral 15 fed further marked separation table wind sifter.

In this respect, every sieve level points 9.1 to 9.4 the second screening device 9 one of these associated air classifier and another air classifier 15 is intended for those parts of the extraction shot, which are within the screening device 9 not on one of the screening stages 9.1 to 9.4 be withheld.

In all wind sifters explained above 12 . 13 . 14 . 15 . 16 become the ones from the individual screening stages 9.1 to 9.4 fed portions of the extraction shred then subjected to a separation according to their specific gravity by the lighter specific particles rise inside the air classifier and discharged there via an upper exit for the specific lighter particles, while the specific heavier particles fall down within the air classifier and There are discharged via a lower outlet of the air classifier for the specific heavier particles.

Like from the 1 As can be seen, all the upper exits of the air classifier 12 to 16 for each specific lighter particles via a common manifold 181 to the line 180 connected, which the supply of the particles to the elevator 18 and subsequently to the collector II for the second fraction of high crude fiber content and low crude protein content, as described in more detail below.

Accordingly, all lower outputs of the air classifier 12 to 16 for the specific heavier particles via a common manifold 170 . 171 with another elevator 17 connected, in the manner explained in more detail below, these particles from the 2 serves for the first fraction with a high crude protein content and low crude fiber content.

By this above-explained classification of the supplied extraction meal first in several successive screening stages according to the respective particle size and subsequent separate feed to air classifiers for the purpose of separation by specific gravity is the preparation of the extraction meal in the said two fractions, wherein the first fraction has a high crude protein content and low has crude Rohfasergehalt and the second fraction has a low crude protein content and a high crude fiber content, already effected. The following from the 2 and 3 Only parts of the system that are still visible serve merely for further aftertreatment and are each part of the collection devices I and II for the first and second fraction, respectively.

As in the further run of the plant from the 2 can be seen, get on the two elevators 17 . 18 fed fractions of the extraction meal initially on appropriately assigned feeders 19 . 20 , which in each case allow an exact continuous quantity control of the first or second fraction produced and, moreover, can also be equipped with quality control automatic analyzers in a manner not further specified. The over the elevator 17 fed first fraction passes through the feeder belt 20 in a production tank 32 and from there via a dosing screw 33 with frequency control and a steam dispenser 34 in a conditioning and conditioning mixer 35 be promoted and subsequently a pelleting press 36 be fed so that pellets are recovered from the first fraction, which then in a countercurrent condenser 37 cooled and ultimately can be provided in the collection of the collection device I for loading.

In contrast, that's about the elevator 18 discharged extraction meal of the second fraction via the belt feeder 19 continuously discharged and first passes into a hopper 21 from which they have a discharge screw 22 in an elevator 23 and from there via at least one with a tube magnet 24 equipped pre-tank 25 and a metering screw 26 in a continuous scale 27 is encouraged. From there, the material passes through a vortex mixer 29 , if necessary with the addition of at least one via the dispenser 28 from a pump 31 with storage tank 30 fed liquid additive for animal nutrition in another elevator 38 , From there, see 3 , the second fraction then passes through a trough chain conveyor 39 in an interim storage 40 in the form of several silos, from which the fraction via a trough chain conveyor 41 controlled by slider 42 into another elevator 43 can be discharged. From there, the material passes through a press hopper 44 and a metering screw 45 into one via a steam feeder 46 Steam-fed conditioning and conditioning mixers 48 and then becomes a pelleting press 49 fed, so that the material of the second fraction can be processed in the form of pellets and after passing through a countercurrent cooler 50 arrived in the collection or finished goods warehouse collection device II for loading.

Consequently becomes a garbage-free, d. H. residue-free complete Preparation of the supplied extraction meal from sunflower seed in two fractions, namely a first fraction with high Crude protein and low crude fiber content and a second fraction with low crude protein content and high crude fiber content causes.

The first fraction is a GMO-free protein carrier for poultry, pigs, fish, pets and shows about 46-48% crude protein and 2.5-3% crude fat on.

The second fraction may be due to the high crude fiber content of ruminants be fed or - especially after pelleting - as Energy sources are used for heating purposes. Due to the low residual moisture of usually less as 10% of this energy is the well-known wood pellets superior in calorific value and price.

So was in an analysis of the obtained second fraction with a Dry matter of 90.7% and a water content of 9.3% a calorific value of 18,445 kJ / kg TM.

Pelleting increases the density from about 140 kg / m ³ to about 600 kg / m ³ , which makes storage and transport particularly efficient.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1372409 B1 [0003]

Claims (29)

Process for the waste-free treatment of extraction meal from sunflower seed, in which the extraction meal is separated by at least one sieving followed by one-off air classification into a first fraction of high crude protein and low crude fiber content and into a second fraction of low crude protein and high crude fiber content, characterized that the extraction meal is first subjected to at least single-stage coarse screening in which the coarser particles of the extraction meal which do not pass the coarse screening are immediately added to the second fraction and the finer particles of the extraction meal passing the coarse screening are subjected to a multistage fine screening according to grain sizes in which the particles are separated into a plurality of particle size fractions and subsequently each of these particle size fractions is subjected separately to an air classification in which the particle size fraction is specified in spec H lighter and specific heavier particles is separated and then added the specific lighter particles of all particle size fractions of the second fraction and the specific heavier particles of the first fraction. Method according to claim 1, characterized in that that an at least two-stage coarse screening of the extraction meal is carried out. Method according to claim 1 or 2, characterized that before coarse screening a pre-screening of the extraction meal is carried out in which the coarser particles of the extraction meal, which does not pass the pre-screening, subjected to mechanical comminution and subsequently are fed to the pre-screening and the finer particles, which pass the pre-screening, fed to fine screening become. Method according to one of claims 1 to 3, characterized in that the coarse screening and / or pre-screening passing particles of the extraction meal before the fine screening be ground. Method according to one of claims 3 or 4, characterized in that the pre-screening performed in several stages becomes. Method according to one of claims 1 to 5, characterized in that the fine screening in four stages with each other the following sieve widths of the screening stages of 1,300 μm, 800 μm, 500 microns and 300 microns is performed. Method according to one of claims 1 to 6, characterized in that the coarse screening with two successive following screen widths of the screening stages of 2,500 μm and 1,750 μm is carried out. Method according to one of claims 3 to 7, characterized in that the pre-screening with two successive following screen widths of 3,000 μm and 1,750 μm is carried out. Method according to one of claims 1 to 8, characterized in that the first and second fraction continuously over separate belt scales are removed. Method according to one of claims 1 to 9, characterized in that the extraction meal before the or coarse screening a magnetic separator for depositing metallic Passes through impurities. Method according to one of claims 1 to 10, characterized in that the extraction meal before the or coarse sifting a lump breaker to dissolve Clumping goes through. Method according to one of claims 1 to 11, characterized in that the first and / or second fraction be processed into pellets. Plant for the waste-free treatment of extraction meal from sunflower seed, comprising a feeding device A for the extraction meal, at least one screening device connected to the feeding device A. 7 . 8th . 9 and at least one of the screening device 7 . 8th . 9 downstream wind sifter 12 . 13 . 14 . 15 . 16 and two collecting devices I, II for the at least one screening device 7 . 8th . 9 and the at least one air classifier 12 . 13 . 14 . 15 . 16 continuous extraction meal, wherein a collecting device 1 the collection of a first fraction of the high raw protein and low crude fiber extraction meal and the other collection device II of the second fraction collection of the Extrak serving shredded with low raw protein and high crude fiber content, characterized in that the task device downstream of a first screening device 8th is provided for the extraction meal, in which a coarse screening of the extraction meal is feasible, wherein in the first screening device 8th retained coarse particles of the extraction meal can be fed directly to the collecting device for the second fraction and the first screening device 8th a second screening device 9 is subordinate, the several increasing in the Siebfeinheit screening stages 9.1 . 9.2 . 9.3 . 9.4 for the extraction meal, the second screening device 9 such with the first screening device 8th connected to that is the first screening device 8th Passing particles of the extraction meal can be acted upon and each screening stage 9.1 . 9.2 . 9.3 . 9.4 the second screening device 9 a separate air classifier 12 . 13 . 14 . 16 associated with the assigned sieve level 9.1 . 9.2 . 9.3 . 9.4 not passing particles of the extraction meal can be acted upon as well as another with the all screening stages 9.1 . 9.2 . 9.3 . 9.4 the second screening device 9 Passing particles of the extraction meal acted upon air classifier 15 is provided, and the upper output of the air classifier 12 . 13 . 14 . 15 . 16 for the specific lighter particles with the collector II for the second fraction and the lower outlet of the air classifier 12 . 13 . 14 . 15 . 16 for the specific heavier particles with the collector 1 connected to the first fraction. Plant according to claim 13, characterized in that the first screening device 8th at least two sieving steps increasing in the screening fineness 8.1 . 8.2 includes. Plant according to claim 13 or 14, characterized in that in front of the first screening device 8th a Vorsiebstation 7 with a downstream mill 10 is provided and the mill 10 with those parts of the extraction meal can be acted upon, the Vorsiebstation 7 do not pass, and a bypass line BP between the Vorsiebstation 7 and the second screening device 9 is provided, over which those particles, bypassing the first screening device 8th the second screening device 9 can be fed, which the Vorsiebstation 7 happen. Plant according to claim 15, characterized in that the mill 10 is designed as impact-impact mill. Installation according to one of claims 13 to 16, characterized in that one of the second screening device 9 upstream mill 11 for the second screening device 9 provided extraction meal to be supplied. Plant according to claim 17, characterized in that the mill 11 is designed as a hammer mill. Installation according to one of claims 15 to 18, characterized in that the Vorsiebstation 7 several sieve steps rising in the sieve fineness 7.1 . 7.2 includes. Installation according to one of claims 13 to 19, characterized in that the first screening device 8th two consecutive screening stages 8.1 . 8.2 with screen widths of 2,500 μm and 1,750 μm. Plant according to one of claims 13 to 20, characterized in that the second screening device 9 four consecutive screening stages 9.1 . 9.2 . 9.3 . 9.4 with screen widths of 1,300 μm, 800 μm, 500 μm and 300 μm. Plant according to one of claims 15 to 21, characterized in that the pre-screening station 7 two consecutive sieve steps 7.1 . 7.2 with screen widths of 3,000 μm and 1,750 μm. Installation according to one of claims 13 to 22, characterized in that the first and second collecting device I, II each a dosing belt weigher 19 . 20 assigned. Installation according to one of claims 13 to 23, characterized in that the task device A is a magnetic separator 4 includes. Installation according to one of claims 13 to 24, characterized in that the feeding device A is a lump breaker 30 includes. Plant according to one of claims 13 to 25, characterized in that a pelleting press 36 . 49 is intended for the first and / or second fraction. Animal feed for monogastric, formed from that according to the preceding claims prepared first fraction of the extraction meal. Animal feed for ruminants, formed from that according to the preceding claims prepared second fraction of the extraction meal. Fire energy source, made up of that according to the preceding claims prepared second fraction of the extraction meal.