DK173157B1

DK173157B1 - Method for preparation of a dust-free mixture of meal and active ingredients for use as feed and said dust-free mixture

Info

Publication number: DK173157B1
Application number: DK339986A
Authority: DK
Inventors: Ernest Grabitz
Original assignee: Dox Al Italia Spa
Priority date: 1986-07-17
Filing date: 1986-07-17
Publication date: 2000-02-14
Also published as: DK339986D0; DK339986A

Description

i i DK 173157 B1i in DK 173157 B1

Den foreliggende opfindelse angår en fremgangsmåde til fremstilling af blandinger til anvendelse ved foderfremstilling bestående af fodermel og aktive bestanddele med reduceret tilbøjelighed til at støve.The present invention relates to a process for preparing mixtures for use in feed preparation consisting of feed flour and active ingredients with reduced propensity to dust.

55

Mere specielt angår opfindelsen en fremgangsmåde til fremstilling af blandinger til anvendelse ved foderproduktion og/eller til fodring af husdyr, hvad enten de er opløselige eller ikke, med lav tilbøjelighed til at støve 10 ved hjælp af tilsætning til bærestoffet af et aktivt princip og et let anvendeligt overfladeaktivt middel.More particularly, the invention relates to a process for preparing mixtures for use in feed production and / or for feeding livestock, whether soluble or not, with a low propensity to dust 10 by addition to the carrier of an active principle and a light weight. useful surfactant.

Det er velkendt, at de aktive principper til anvendelse ved foderproduktion, f.eks. antibakterielle midler som 15 Carbadox, på grund af deres kemisk-fysiske egenskaber og specielt på grund af deres granulometriske egenskaber forårsager, at produkterne støver, og dette bevirker adskillige ulemper ved brugen af disse produkter, specielt er det farligt for brugeren, men også på grund af den 20 kendsgerning, at det ikke er muligt at opnå et homogent produkt i blandingstrinnet.It is well known that the active principles for use in feed production, e.g. antibacterial agents such as 15 Carbadox, because of their chemical-physical properties and especially because of their granulometric properties cause the products to dust and this causes several disadvantages in the use of these products, especially it is dangerous for the user, but also because by the fact that it is not possible to obtain a homogeneous product in the mixing step.

De aktive principper ved foderproduktion viser faktisk en 1 granulometrisk sammensætning med ca. 30 vægt-% mindre 25 end 10 pm i størrelse; derudover er krystallerne, når det aktive princip udgøres af Carbadox, meget tilbøjelige til at gå i stykker og under blandingerne har de en tendens til at blive endnu mindre i størrelse.The active principles of feed production actually show a 1 granulometric composition of approx. 30% by weight less than 25 µm in size; moreover, when the active principle is made up of Carbadox, the crystals are very prone to breakage and under the mixtures they tend to become even smaller in size.

30 Når man tager i betragtning, at forbindelserne, der virker som bærestof, enten alene eller blandet med hinanden, er i besiddelse af en uens og betydelig højere granulome-tri, er pulveret, der kommer ud fra blanderen, i det væsentlige bestående af Carbadox, og dette forårsager en 35 ikke-homogen blanding og opnåelse af et produkt med en titer, der er forskellig fra den ønskede værdi.30 Considering that the compounds acting as a carrier, either alone or mixed with each other, possess a dissimilar and significantly higher granulometry, the powder emanating from the mixer is essentially Carbadox. and this causes a non-homogeneous mixing and obtaining a product with a titer different from the desired value.

v 2 DK 173157 B1v 2 DK 173157 B1

Blandingsoperationerne udføres i lukket udstyr, men man har stadig ulemperne ved tilfældige lækager og faren ved det støvende materiale for brugeren.The mixing operations are performed in closed equipment, but the disadvantages of random leaks and the danger of the dusty material to the user are still present.

55

Herudover skal man altid tænke på faren ved antændeligheden og tilbøjeligheden til at eksplodere for Carbadox's tynde pulvere, hvorfor disse pulvere f.eks. ikke kan transporteres med luftfragt.In addition, one must always think about the danger of flammability and the tendency to explode for Carbadox's thin powders. cannot be carried by air cargo.

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Der kendes metoder til fremstilling af ikke-støvende blandinger til anvendelse ved foderproduktion; f.eks. fremstilles som omhandlet i italiensk patentskrift nr.Methods are known for preparing non-dusting mixtures for use in feed production; eg. is manufactured as disclosed in Italian Pat.

1 046 986 blandinger af mel med et quinoxalin-1,4-dioxid 15 antibakterielt middel, idet disse blandinger gøres ikke-støvende ved tilsætning af en ikke-toxisk olie.1,046,986 mixtures of flour with a quinoxaline-1,4-dioxide antibacterial agent, these mixtures being rendered non-dusty by the addition of a non-toxic oil.

For at denne fremstilling skal være effektiv, skal den udføres i to trin: i et første trin blandes en første 20 mængde af olien med melet, i det andet trin iblandes det antibakterielle middel, og i det tredie trin iblandes den tilbageværende del af olien.For this preparation to be effective, it must be carried out in two steps: in a first step, an initial 20 amount of the oil is mixed with the flour, in the second step the antibacterial agent is mixed, and in the third step the remaining part of the oil is mixed.

Udover at det er indviklet med multitrinsbearbejdninger, 25 indebærer tilsætningen af olien til blandingen, at det er besværligt at blande, og blandingens fritflydende egenskaber nedsættes, hvilket ikke fremmer den elektriske ledeevne .In addition to being intricate with multi-stage machining, the addition of the oil to the mixture implies that it is difficult to mix and the mixture's free-flowing properties are impaired, which does not promote electrical conductivity.

30 Det skal bemærkes, at mange aktive principper har sådanne elektrostatiske egenskaber, at det er vanskelig at homogenisere blandingen, fordi det aktive princip har en tendens til at samle sig i døde områder i blanderen og pådennes vægge, hvilket forårsager problemer med selvan- r 35 tænding og eksplosion af pulveret.30 It should be noted that many active principles have such electrostatic properties that it is difficult to homogenize the mixture because the active principle tends to accumulate in dead areas of the mixer and inflate walls, causing self-problems 35 ignition and explosion of the powder.

i 3 DK 173157 B1 USA patentskrift nr, 3 617 299 omhandler en ikke-agglome- rende, ikke-adskillende præmix til dyrefoder, der omfat ter en grundigt blandet blanding af en aktiv bestanddel og et bærestof. Fremgangsmåden omfatter således en særlig 5 behandling af understøttelsen (bærestoffet) og af den aktive bestanddel (f.eks. et antibakterielt middel) med et særligt, forskelligt overfladeaktivt middel ved begge behandlinger.U.S. Patent No. 3,617,299 discloses a non-agglomerating, non-separable animal feed premix comprising a thoroughly blended mixture of an active ingredient and carrier. Thus, the process comprises a particular treatment of the support (carrier) and of the active ingredient (e.g., an antibacterial agent) with a particular, different surfactant in both treatments.

10 Man har nu udviklet en fremgangsmåde til opnåelse af ikke-støvende blandinger af mel eller fodermel med aktive principper til anvendelse ved foderfremstilling og/eller til husdyrfodring, der løser ovennævnte ulemper, og som specielt gør det muligt at arbejde i enkelttrin, hvorved 15 der fås særdeles fritflydende produkter.10 A method has now been developed for obtaining non-dusting mixtures of flour or feed meal with active principles for use in feed preparation and / or for livestock feeding, which solves the above-mentioned disadvantages, and which in particular makes it possible to work in single steps, whereby 15 highly free-flowing products are available.

Herudover fjernes ved denne fremgangsmåde ulemperne, der skyldes elektrostatiske udladninger: blandinger opnået ved kendte metoder udviser faktisk en modstand på mere 20 end 20 ΜΩ, målt ved hjælp af en føler i en dybde af 15 cm og med en afstand på 13 mm mellem elektroderne, medens blandingerne opnået ved hjælp af den omhandlede fremgangsmåde udviser en modstand på 3 ΜΩ målt på samme måde.In addition, in this method, the disadvantages caused by electrostatic discharges are removed: mixtures obtained by known methods actually exhibit a resistance of more than 20 ΜΩ, measured by a sensor at a depth of 15 cm and a distance of 13 mm between the electrodes, while the mixtures obtained by the process of the present invention exhibit a resistance of 3 ΜΩ measured in the same way.

2525

Opfindelsen tilvejebringer således en fremgangsmåde til fremstilling af ikke-støvende blandinger af fodermel eller mel med aktive principper til anvendelse ved foderfremstilling, der er ejendommelig ved de ti krav l's ken-30 detegnende del angivne. Herudover angår opfindelsen ikke-støvende blandinger af den i krav 15 angivne art.Thus, the invention provides a process for the preparation of non-dusting mixtures of feed flour or flour with active principles for use in feed preparation which is characterized by the characterizing part of claim 10. In addition, the invention relates to non-dusting mixtures of the kind specified in claim 15.

" Disse og andre egenskaber ved den omhandlede fremgangsmå de forklares nærmere i foretrukne udførelseseksempler i 35 det efterfølgende."These and other features of the present process are explained in more detail in preferred embodiments hereinafter.

DK 173157 B1 I en blander af den type, der normalt anvendes til blanding af pulverlignende materialer, anbringes fodermelet eller melet, der skal anvendes som bæremateriale på det aktive princip. Blanderen kan f.eks. være den horisontale 5 type med to blandetromler eller kombineret med blade eller af forskydnings- og tryktypen.In a mixer of the type normally used for mixing powder-like materials, the feed flour or flour to be used as the carrier material is placed on the active principle. The mixer can e.g. be the horizontal type 5 with two mixing drums or combined with blades or of the shear and pressure type.

Eksempler på fodermel eller mel, der kan anvendes ved den omhandlede fremgangsmåde er: mel af kornarter og klid, 10 biprodukter i forbindelse hermed, sukker, gluten, prote-inholdigt mel af vegetabilsk og animalsk oprindelse både fra forgæring og ikke-forgæring. Restgær fra industrielle processer i forbindelse med forgæring, olie-frøekstrak-tionsmel, formalede mineralske pulvere af enten naturlig 15 eller kemisk-industriel oprindelse, hver for sig eller blandet med hinanden.Examples of feed flour or flour which may be used in the process of the present invention are: cereals and bran flour, 10 related by-products, sugar, gluten, protein-containing flour of vegetable and animal origin from both fermentation and non-fermentation. Residual yeasts from industrial processes associated with fermentation, oilseed extraction flour, ground mineral powders of either natural or chemical-industrial origin, separately or mixed with each other.

Disse forskellige melarter har sædvanligvis følgende egenskaber: granulometri: 80 vægt-% beliggende mellem 20 20 og 80 mesh; fugtighed: fra 2 til 13 vægt-%.These different flours usually have the following properties: granulometry: 80% by weight located between 20 and 80 mesh; Humidity: from 2 to 13% by weight.

På sådant fodermel eller mel sprøjtes under blandingen et ikke-ionisk, fysiologisk acceptabelt overfladeaktivt middel .On such feed flour or flour, a non-ionic, physiologically acceptable surfactant is sprayed during mixing.

25 Påsprøjtningen udføres ved hjælp af dispensere til mikro-niseret væske, f.eks. ved hjælp af trykluft atomizer-sprøjtehoveder til trykfremført væske; før eller under eller efter tilsætningen af det overfladeaktive middel, 30 tilsættes det aktive princip i pulverform; homogenisering af systemet opnås ved blanding.The spraying is carried out by means of micronized liquid dispensers, e.g. using compressed air atomizer spray heads for pressurized fluid; before or during or after the addition of the surfactant, the active principle is added in powder form; homogenization of the system is achieved by mixing.

Eksempler på ikke-ioniske overfladeaktive midler, der kan anvendes ved den omhandlede fremgangsmåde er: monoestere 35 af propylenglycol og af spiselige fede syrer; stearyl-2-mælkesyre; eddikesyre, mælkesyre, citronsyre, vinsyre.Examples of non-ionic surfactants which can be used in the process of the present invention are: propylene glycol monoesters 35 and of edible fatty acids; stearyl-2-lactic acid; acetic acid, lactic acid, citric acid, tartaric acid.

5 DK 173157 B1 monoacetylvinsyreestere af mono- og diglycerider af spiselige fede syrer; glycerol-polyethylenglycolricinoleat; polyethylenglycolestere af sojabønneolie fede syrer; sor-bitanmonostearat; sorbitantristearat; sorbitanmonolaurat; 5 sorbitanmonooleat, sorbitanmonopalmitat, propylenglycol alginat.5 DK 173157 B1 monoacetyl tartaric acid esters of mono- and diglycerides of edible fatty acids; glycerol-polyethylenglycolricinoleat; polyethylene glycol esters of soybean oil fatty acids; sorbitan bitanmonostearat; sorbitan tristearate; sorbitan monolaurate; Sorbitan monooleate, sorbitan monopalmitate, propylene glycol alginate.

Herudover kan blandinger af disse overfladeaktive midler med polyethylenglycol og/eller med propylenglycol og/el-10 ler med glycerol anvendes.In addition, mixtures of these surfactants with polyethylene glycol and / or with propylene glycol and / or glycerol can be used.

Flydende konserveringsmidler, der virker som mughæmmere, som f.eks. propionsyre, myresyre, mælkesyre og andre, kan også tilsættes. Disse forbindelser sættes fortrinsvis til 15 den blanding, der skal udsprøjtes og tjener også til at gøre denne mere flydende, og er fuldstændig blandbar hermed.Liquid preservatives that act as inhibitors, such as propionic acid, formic acid, lactic acid and others may also be added. These compounds are preferably added to the mixture to be sprayed and also serve to make it more fluid and are fully miscible therewith.

Det aktive princip, der indarbejdes i blandingen, som 20 f.eks. Carbadox, Nitrovin, Olaquindox, Flurazolidon, Di-metridazol og andre, viser følgende granulometriske egenskaber: 90-95 vægt-% <80 mesh.The active principle incorporated into the mixture, e.g. Carbadox, Nitrovin, Olaquindox, Flurazolidone, Di-metridazole and others show the following granulometric properties: 90-95% by weight <80 mesh.

Den anvendte mængde overfladeaktivt middel ligger inden 25 for området på fra 0,5 til 8 vægt-% og fortrinsvis fra 1 til 2 vægt-% i forhold til fodermelet eller melet. Idet mængden af polyethylenglycol eller af propylenglycol eller af glycerol ligger inden for området fra 0,5 til 10 vægt-% og fortrinsvis fra 2 til 4 vægt-% i forhold til ~ 30 fodermelet eller melet, og mængden af mughæmmende konser- : veringsmiddelvæske ligger mellem 0,1 og 5 vægt-% og for- ϊ trinsvis mellem 0,3 og 2 vægt-% i forhold til fodermelet eller melet.The amount of surfactant used is within the range of from 0.5 to 8% by weight and preferably from 1 to 2% by weight relative to the feed meal or flour. As the amount of polyethylene glycol or of propylene glycol or of glycerol is in the range of from 0.5 to 10% by weight and preferably from 2 to 4% by weight relative to ~ 30 the feed meal or flour, and the amount of preservative preservative liquid is between 0.1 and 5% by weight and preferably between 0.3 and 2% by weight relative to the feed meal or flour.

*τ· r DK 173157 Bl 6 Mængden af aktivt princip i blandingen ligger inden for området fra 2 til 80 vægt-% og fortrinsvis fra 5 til 20 vægt-%.The amount of active principle in the mixture ranges from 2 to 80% by weight and preferably from 5 to 20% by weight.

5 Følgende eksempler belyser opfindelsen nærmere.The following examples illustrate the invention in more detail.

EKSEMPEL 1 I en blander til pulverformet materialer af den horison-10 tale type blev anbragt 840 kg mel bestående af majsfoder-mel 40 vægt-%, sojabønnemel 40 vægt-% og calciumcarbonat 20 vægt-% og 102,5 kg Carbadox til 99,2 vægt-% og med granulometrien: 93 vægt-% <80 mesh.EXAMPLE 1 In a horizontal-type powder mixer, 840 kg of flour consisting of corn fodder flour 40% by weight, soybean meal 40% by weight and calcium carbonate 20% by weight and 102.5 kg of Carbadox for 99 were placed. 2% by weight and with the granulometry: 93% by weight <80 mesh.

15 Ved hjælp af fire sprøjteaggregater med trykluft atomize-ringssprøjtehoveder til trykfremførte væske tilsattes 15 kg glycerol-polyethylenglycolricinoleat forudblandet med 35 kg 1,2-propandiol og 10 kg propionsyre.15 Using four compressed air atomizers with atomized spray heads for pressurized liquid, 15 kg of glycerol-polyethylene glycol ricinoleate was premixed with 35 kg of 1,2-propanediol and 10 kg of propionic acid.

20 Påsprøjtningen udførtes, medens blanderen kørte, over en 5 minutters periode; derefter fortsattes blandingen yderligere 20 minutter.The spraying was carried out while the mixer was running over a 5 minute period; then the mixture was continued for another 20 minutes.

Indarbejdningen af Carbadox i blandingen af mel-overfla-25 deaktivt middel bevirkede, at der blev opnået en meget homogen blanding, som ikke gav anledning til nogen påviselig støvdannelse, og som yderligere udviste særdeles godt fritflydende egenskaber og en modstand på mindre end 3 M_ målt med en føler i en dybde på 15 cm og med en af-30 stand på 13 mm mellem elektroderne.The incorporation of Carbadox into the flour-surfactant blend resulted in a very homogeneous blend which did not give rise to any detectable dust formation and further exhibited extremely good free flow properties and a resistance of less than 3 M with a sensor at a depth of 15 cm and with a distance of 13 mm between the electrodes.

Blandingens støveegenskab blev bestemt ved følgende metode, der allerede forefandtes for at måle Carbadox-mel-blandingers støveegenskaber under de betingelser, der fo-35 rekommer ved brugen. Indholdet af sækken indeholdende Carbadox-melblandingen udhældes af en arbejder i en flad Ύ 7 DK 173157 B1 bakke anbragt tæt ved hans fødder, og på samme tid udtages prøver af atmosfæren forurenet med evt. tilstedeværende støv i blandingen.The dust property of the mixture was determined by the following method already available to measure the dust properties of Carbadox flour mixtures under the conditions of use. The contents of the sack containing the Carbadox flour mixture are poured by a worker in a flat Ύ 7 DK 173157 B1 tray placed close to his feet, and at the same time samples of the atmosphere contaminated with any. dust present in the mixture.

5 Prøveudtagningen udføres ved hjælp af "SAS Compact" (Overfladeluftsystem) udstyr fra pbi International, udstyret med et modificeret hoved, på hvilket Sartorius-filtre af regenereret cellulose (ref. SM 11606) er anbragt .5 Sampling is carried out using "SAS Compact" equipment from pbi International, equipped with a modified head, on which Sartorius regenerated cellulose filters (ref. SM 11606) are placed.

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Hele prøveudstyret er anbragt ved hjælp af en fastgjort ramme ca. 150 cm fra det plan, hvorpå blandingen udhældes; efter afslutningen løsnes filteret fra hovedet, og muligt aflej ret Carbadox ekstraheres, og bestemmelsen fo-15 retages ved hjælp af HPLC (højtryksvæskekromatografi) som beskrevet af Lowie et al. in J. Assoc. Off. Anal. Chem.The entire test equipment is arranged by means of a fixed frame approx. 150 cm from the plane on which the mixture is poured; after completion, the filter is detached from the head and possible Carbadox deposited, and the assay is performed by HPLC (high pressure liquid chromatography) as described by Lowie et al. in J. Assoc. Off. Anal. Chem.

(vol. 66, nr. 3, side 602-605, 1983).(Vol. 66, No. 3, pages 602-605, 1983).

Følgende resultater blev opnået: mængde af Carbadox mind-20 re end 10 pg/m3 atmosfærisk luft (resultater opnået ud fra 3 målinger).The following results were obtained: amount of Carbadox less than 10 pg / m3 of atmospheric air (results obtained from 3 measurements).

EKSEMPEL 2 (sammenligning) 25 Eksempel 1 blev gentaget under anvendelse af samme arbejdsmetode, samme udstyr og samme mængde ingredienser bortset fra, at den omhandlede anti-støveblanding ikke var tilsat.EXAMPLE 2 (Comparison) Example 1 was repeated using the same method, the same equipment and the same amount of ingredients except that the anti-dust mixture was not added.

30 Blandingens støveevne blev bestemt som beskrevet i eksempel 1, og ud fra 3 enkeltforsøg opnåedes følgende resultater.The dusting capacity of the mixture was determined as described in Example 1, and from 3 single experiments the following results were obtained.

35 DK 173157 Bl 8DK 173157 Pg 8

Carbadox mg/m3 atmosfærisk luft:Carbadox mg / m3 atmospheric air:

Forsøg nr. 1: 4 mg/m3 5 Forsøg nr. 2: 6 mg/m3Test # 1: 4 mg / m3 5 Test # 2: 6 mg / m3

Forsøg nr. 3: 23 mg/m3 Følermålt modstand mere end 20 M.Experiment # 3: 23 mg / m3 Sensor resistance greater than 20 M.

10 EKSEMPEL 3EXAMPLE 3

Eksempel 1 blev gentaget under anvendelse af samme udstyr, samme arbejdsbetingelser og samme mængde materiale bortset fra, at 8 kg glycerol-polyethylenglycolricinole-15 at, 30 kg glycerol og 5 kg mælkesyre anvendtes.Example 1 was repeated using the same equipment, same working conditions and the same amount of material except that 8 kg of glycerol-polyethylene glycol ricinole-15, 30 kg of glycerol and 5 kg of lactic acid were used.

Den opnåede blandings støveevne blev bestemt som beskrevet i eksempel 1, og følgende resultater opnåedes: Carba-dox-mængde end 15 pg pr. m3 atmosfærisk luft. Modstand 20 mindre end 3 ΜΩ.The dusting ability of the mixture obtained was determined as described in Example 1, and the following results were obtained: Carba-dox amount than 15 pg. m3 atmospheric air. Resistance 20 less than 3 ΜΩ.

EKSEMPEL 4EXAMPLE 4

Eksempel 1 blev gentaget under anvendelse af samme ud-25 styr, samme arbejdsbetingelser og samme mængder materiale bortset fra, at der som antistøvemiddel anvendtes 15 kg polyoxyethylen-sorbitanmonooleat og 45 kg 1,2-propan-di-ol.Example 1 was repeated using the same equipment, the same working conditions and the same amounts of material except that 15 kg of polyoxyethylene sorbitan monooleate and 45 kg of 1,2-propanediol were used as the antibody.

30 Blandingens støveevne blev bestemt som beskrevet i eksempel 1, og følgende resultater opnåedes: Carbadox-indhold mindre end 10 pg/m3 atmosfærisk luft (resultater opnået ud fra 3 målinger).Dust performance of the mixture was determined as described in Example 1 and the following results were obtained: Carbadox content less than 10 pg / m 3 atmospheric air (results obtained from 3 measurements).

35 Følermålt modstand: mindre end 3 ΜΩ.35 Sensor resistance: less than 3 ΜΩ.

Claims

A process for the preparation of non-dusting mixtures comprising additives and / or active principles for use in feed preparation on a support / supports physically in the form of feed flour or flour which is either soluble or insoluble, characterized by that in a single powder mixer, the selected support (s) which is mixed with an active principle and sprayed with an anti-dust additive containing only a physiologically acceptable nonionic surfactant is placed in an amount between 0.5 and 8% by weight relative to the amount of the support ice.

Process according to claim 1, characterized in that the antibody (s) containing the surfactant is added to the selected support (s) and the active principle is then added.

Process according to claim 1, characterized in that the feed flour or flour is selected from: cereals, wheat flour and bran flour, related by-products, sugars, gluten, starch, proteinaceous flour of both vegetable and animal origin, originating from both fermentation and non-fermentation, residual yeasts from industrial processes resulting from fermentation, oilseed extraction melts, ground mineral powders of either natural or chemical-industrial origin, either alone or mixed, with a granulometry of more than 80% -% lying between 20 and 80 mesh.

Process according to claim 3, characterized in that the moisture content of the support (flour or flour) is between 2 and 13% by weight. DK 173157 Bl *

Process according to claim 1, characterized in that the surfactant is selected from: mono-esters of propylene glycol and of edible fatty acids; stearyl-2-lactic acid, acetic acid, lactic acid, citric acid, tartaric acid, monoacetyltartaric acid esters of mono- and di-glycerides of edible fatty acids; glycerol-polyethylene glycol ricinoleate; polyethylene glycol esters of soybean oil fatty acids; sorbitan monostearate; sorbitan tristearate; sorbitan monolaurate; sorbitan monooleate; sorbitan monopalmitate; pro-pylenglycolalginat.

Process according to claim 1, characterized in that the active principle is Carbadox.

Process according to claim 1, characterized in that the active principle is incorporated in the feed flour or flour to which the surfactant is added by mixing.

Process according to claim 1, characterized in that the surfactant is added by spraying with a micronized liquid dispenser on the feed flour or the flour to be mixed.

Process according to claim 1, characterized in that the surfactant is used in admixture with polyethylene glycol or propylene glycol or glycerol.

Process according to claim 1, characterized in that the surfactant is used in admixture with anti-mosquito preservatives. DK 173157 B1

Process according to claim 1, characterized in that the surfactant is used in an amount of 1 to 2% by weight relative to the support. 5

Process according to claim 1, characterized in that the active principle of the mixture is in the range of 2 to 80% by weight and preferably from 5 to 20% by weight. 10

Process according to claim 9, characterized in that polyethylene glycol or propylene glycol or glycerol is used in an amount between 0.5 and 10% by weight relative to the feed meal or flour. 15

Process according to claim 10, characterized in that the antimug preservatives are used in an amount of from 0.1 to 5% by weight and preferably from 0.3 to 2% by weight relative to the feed meal or flour. 20

Non-dusty mixtures in the form of feed flour or flour which are soluble and non-soluble, with active principles for use in feed preparation according to claims 1 to 14.