RU2635365C1 - Method for producing fodder-medicated mixtures - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: method comprises obtaining a primary premix by simultaneously grinding and mixing in a shredder-mixer for primary premixes and producing a fodder mixture by mixing the primary premix with the filler in the mixer of the fodder-medicated mixtures in a fluidized bed mode. The fodder-medicated mixture is obtained by moving the mass of the mixed material by a fling from bottom upward along the entire perimeter of the inner spherical surface of the working chamber, along the inner surface of the guide cowl and by smoothly changing the flow direction from top downward. The stability of the fluidized bed is enhanced by the excessive pressure in the area of the inner surface of the working chamber and the guide cowl, and in the area of the vertical axis - the rarefaction.

EFFECT: use of the invention will ensure a high uniformity of mixing by equalizing the fractional composition of the mixed materials and improving the quality of the medicated feeding stuff.

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Description

The invention relates to agricultural production, and in particular to methods for preparing feed mixtures, as well as mineral and vitamin feed additives, and can be used in livestock farms and animal feed enterprises.

The well-known "Method of two-stage dosing and mixing of the components of feed" (US Pat. RU No. 2075300 C1, A23N 17/00, 06/22/94, 06.06.94), which uses a mobile dispenser, separator, chopper and mixer, located in series. The method is very cumbersome, requiring a large amount of equipment.

The known method implemented in the installation for the preparation of premixes and feed mixtures (US Pat. RU No. 2289974 C1, A23N 17/00, 06/21/2005). This installation implements a two-stage method for preparing premixes and feed mixtures.

However, the above method does not provide the required quality of mixing, because the first mixing stage is carried out in a centrifuge in the form of a truncated cone, in which the material under the action of centrifugal force is pressed by a layer to the inner walls of the mixer and mixes poorly.

The low uniformity of mixing in the second stage is due to the fact that the working body of this mixer, made in the form of a truncated cone with a screw guide, does not provide intensive mixing, because the material is transferred between the layers.

The mixers are interconnected by means of a spiral-screw conveyor and when moving the mixture (forced movement), the mixed premix undergoes segregation (separation of components) by physical and mechanical properties.

The closest in technical essence of the invention is the method implemented in the installation for the preparation of premixes and feed mixtures (US Pat. RU 2411884 C2, A23N 17/00, 02/20/2011, bull. No. 29), adopted for the prototype, which consists of two mixers : a chopper-mixer for the preparation of primary premixes and a mixer for feed mixtures, the cylindrical body of which and the design of rectangular blades do not provide uniform mixing and stable formation of a fluidized bed. When the mixture moves from the horizontal bottom of the mixer to a vertical cylindrical surface, and from the vertical to horizontal in the upper part of the mixer, it slows down the processed material and causes its turbulent movement, in which the fluidization process is disturbed and the quality of mixing is lost. The above installation does not fully correspond to the technical purpose of the alleged invention.

The objective of the invention is to create a method of preparation of feed mixtures, providing high uniformity of mixing by leveling the fractional composition of the mixed materials and improving the quality of medicinal feed.

The problem is achieved in that in the method of preparing feed mixtures, including obtaining the primary premix by grinding and mixing in the grinder-mixer for primary premixes, preparing the feed mixture by mixing the primary premix with filler in the mixer of feed mixtures in the fluidized bed mode, that the feed-drug mixture is obtained by moving the mass of the mixed material with firewood from bottom to top around the entire perimeter of the inner sphere -symmetric surface of the working chamber, the direction to the inner surface of the guide cowl and a smooth change in direction of flow from the top down, the stability of the fluidized bed is enhanced by the overpressure in the zone of the inner surface of the processing chamber and guide the radome, and in the zone of the vertical axis - dilution.

Medications (medicines) are in liquid, crystalline and powder form. For one treatment, for example, sheep weighing 50-60 kg from helminths, 8 mg of nilverm is required. For this, a 50 g portion of nilverm requires a filler (compound feed) of 50 kg, a ratio of 1: 1000. As shown by numerous practice, it is impossible to obtain a homogeneous mixture in existing mixers, while the coefficient of mixing uniformity is 0.80-0.85, and according to veterinary requirements - 0.95-0.97. Therefore, the same weight of the filler is added to the preparation, and in the grinder-mixer for primary premixes, a primary premix is obtained by converting it into a finely divided state with a large developed total surface of the particles, which in turn provides enveloping of the filler particles with the particles of the preparation, i.e. alignment of the physicomechanical properties of the preparation and excipient (Av. St. No. 1050152, 06/22/1983). The resulting primary premix is sent to a feed mixer, 10 kg of filler is added, mixed for 4 minutes, then the remaining 40 kg filler is added, mixed for 5 minutes and a feed and drug mixture is obtained in a uniform fluidized bed mode with a uniformity of 0.95-0.96.

The essence of the proposed method, implemented in the installation for the preparation of feed mixtures, is illustrated in FIG. 1 is a diagram of an apparatus for preparing feed mixtures and FIG. 2 - view A.

Installation for the preparation of feed mixtures contains a chopper-mixer 1 (Fig. 1), a loading device 2 and a loading gateway 3 connecting them to the mixer of feed mixtures 4, consisting of a working chamber 5, made in the form of a truncated sphere, a guide fairing 6, forming a surface which is represented by involute with the origin at the bottom of the loading gateway 3, blades 7, 8, mounted on the drive shaft 9, while at the bottom of the working chamber there is a discharge device 10 with a valve 11.

Works installation for the preparation of feed mixtures as follows. In the grinder-mixer 1, the medicinal product and the filler are filled in, in which the process of grinding and mixing takes place within 30-40 s. The resulting premix is sent through the loading gateway 3 to the mixer of fodder mixtures 4, to which 15-20% of the filler dose is also added from the loading device 2. The drive shaft 9 is driven into rotation with blades 7, 8 fixed on it, which capture the material to be processed and throw uniformly around the entire perimeter (360 °) of the inner surface of the working chamber 5, lift it up and then the guide fairing 6 smoothly transfers the movement of material from bottom to top in the movement from top to bottom, which is also facilitated by the suction force from the blades 7, 8. Thus, a uniform fluidized bed (flowing process) is formed over the entire volume of the mixer of feed preparation mixtures 4, with a uniformly distributed the spreading ingredients of the mixture, which are mixed for 3-4 minutes. At the end of the process, the operation of the drive and the rotation of the shaft 9 is stopped and the remaining dose of the filler is added from the loading device 2, the shaft 9 is rotated and the mixing process is continued for 4-5 minutes. Having completed the process of complete mixing, stop the rotation of the shaft 9, the blades 7, 8 and with the open valve 11, the finished product is unloaded from the unloading device 10 into the container.

Thus, the use of the invention allows to ensure high uniformity of mixing by leveling the fractional composition of the mixed materials and to improve the quality of medical feed.

Claims (1)

A method of preparing feed-and-drug mixtures, including obtaining a primary premix by simultaneously grinding and mixing in a grinder-mixer for primary premixes and preparing a feed mixture by mixing the primary premix with a filler in a mixer of feed-drug mixtures in a fluidized bed mode, characterized in that the feed-drug mixture is obtained by moving the mass of the mixed material with firewood from bottom to top around the entire perimeter of the inner spherical surface of the working chamber, along the inner surface of the guide fairing and a smooth change in the direction of flow from top to bottom, while the stability of the fluidized bed is enhanced by excess pressure in the area of the inner surface of the working chamber and the guide fairing, and in the zone of the vertical axis, rarefaction.

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