Animal cattle feed mill processing technology-analysis of the main points of feed mixing

1. The influence of the animal feed mill cattle feed mixing machine model and its manufacturing level on the mixing

Under normal circumstances, as long as the mixer meets the following requirements, it is qualified and usable:

(1) High mixing uniformity, no dead ends, and less material residue;

(2) Short mixing time, high production efficiency, and matching with the whole unit (including connection and power matching);

(3) The structure is simple and firm, the door switch is flexible, the operation is convenient, and it is convenient for testing, sampling, cleaning and cleaning;

(4) With suitable power equipment, it can work normally under full load;

(5) Under the premise of ensuring the mixing quality, the energy consumption is low.

The type of animal cattle feed mixer machine can be divided into many types according to different classification methods, mainly horizontal, vertical, horizontal paddle, drum, left and right, planetary, rotating container, V, and double cone. Etc., there are two states of intermittent work (batch type) and continuous work. The manufacturing level of different animal feed powder mixer manufacturers will definitely have advantages and disadvantages. When purchasing a mixer, you should choose a mixer with a higher manufacturing level according to your own production needs.　

Different types of powder feed mixing machine for animal cattle feed have different mixing methods. Practice has proved that certain mixing objects (materials) have the best mixing effect in a certain way, so it must be achieved according to different mixing objects and the requirements of the producer. Mixing goals (effects) to choose different types of mixers.

The paddle cattle fodder mixing machine is difficult to mix the powder very uniformly, but when the feed needs to be added with molasses and the addition amount is as high as 30% to 40%, it is quite suitable to use this type of mixer for mixing; The double-cone mixer and V-type mixer are respectively more suitable for mixing materials with better fluidity and poor fluidity.

If the particle size (thickness) between the materials to be mixed is close, a vertical mixer should be used, and when the particle size difference between the materials to be mixed is large, a horizontal mixer should be used (and a rotating container mixer cannot be used) ); If the residual amount is required to be small, a horizontal or rotating container mixer should be used.　

In addition, if the mixing requirements are high, the rotating container mixer should be used, but its production capacity is generally low; and for the general mixing effect, vertical, horizontal or continuous mixing can be selected. Machines, their production capacity is relatively high.　　

The level of mixing efficiency, the length of mixing time, and the speed of mixing are mainly determined by the type of mixer and the manufacturing accuracy of the equipment itself. Generally speaking, the time required for the horizontal cattle cow feed powder mixer to mix uniformly is relatively short, while the vertical mixer takes longer. Of course, the length of the mixing time also depends on other factors such as the type of raw materials and their physical properties.

2. The influence of the physical properties of the material on the mixing　

The closer the main physical properties of the materials to be mixed are, the smaller their separation tendency, the easier it is to be mixed uniformly, the better the mixing effect, and the shorter the time required to achieve uniform mixing. The physical properties mainly include the particle size, shape, bulk density, surface roughness, flow characteristics, adhesion, moisture content, fat content, pH, etc. of the material. The particles of materials with high moisture content are easy to agglomerate or form agglomerates, are not easy to be uniformly dispersed, and the mixing effect is unsatisfactory. Therefore, it is generally required to control the moisture content of the mixed materials not to exceed 12%. Under the condition that the required effect of the formula is not affected, silica, precipitated calcium carbonate, etc. can be added in an appropriate amount when necessary, which is beneficial to improve the cattle feed mixing effect.　　

Some additives in the feed need to be pre-mixed with a carrier (or diluent) before being added to the mixer for cattlel feed to make an additive premix, and then added to the mixer in a certain order to mix with other components. The particle size of the additives that need to be diluted is generally finer, so choose a carrier with a particle size and density close to it. Suitable carriers include commonly used feed components, such as soybeans, wheat bran, defatted rice bran, etc. Generally, materials with fine particle size, no dust, and affinity for the active ingredients in the additives are selected as diluents (or carriers). Choosing neutral materials helps maintain the stability of vitamins and other active ingredients.　

3. The influence of the filling volume of the livestock cattle feed mixer on the mixing

The mixer equipment for cattle feed mainly relies on three mixing methods of convection mixing, diffusion mixing and shear mixing to make the materials move in the machine to achieve the purpose of mixing the materials uniformly. No matter what type of mixer, the appropriate amount of filling is the mixer. An important prerequisite for normal work and expected results. If too much material is loaded, the mixer will be overloaded. More importantly, too much material will affect the cyclic movement of the materials in the machine, resulting in a decrease in mixing quality; if too little material is loaded, it will not be sufficient Exerting the efficiency of the mixer, wasting energy, is not conducive to the flow of materials in the mixer, and affects the mixing quality.

Various types of high quality cattle cow feed mixers have their own reasonable filling coefficients, and their respective reasonable filling coefficients have been obtained in laboratory and practice. Among them, batch (batch type) horizontal spiral mixers have their filling coefficients. Generally 0.6-0.8 is appropriate, and the highest material position should not exceed the plane of the top of the rotor; the filling coefficient of batch vertical screw mixer is generally controlled at about 0.6-0.85; drum mixer is about 0.4; planetary mixer It is about 0.4-0.5; rotary container mixer is about 0.3-0.5; V-type mixer is about 0.1-0.3; double-cone mixer is about 0.5-0.6. The filling coefficient of various continuous mixers is not the same, generally controlled at about 0.25 to 0.5, not more than 0.5.

4. The mixing time should be appropriate

In most cattle compound feed production lines, the most commonly used mixers are basically batch-type, and for batch-type feed mixer with hay conveyor, there is a problem of the best mixing time. If the mixing time is too short, the materials will be discharged without being fully mixed in the cow feed mixer machine, and the mixing quality will definitely not be guaranteed. However, it is not that the longer the mixing time, the better the mixing effect. Experiments have shown that any material with good fluidity and uneven particle size has a tendency to separate. If the mixing time is too long, the material will be over-mixed in the electric cattle feed mixer. Will cause separation, also affect quality, and increase energy consumption.

Because in the mixing process of cattle cow feed making materials, mixing and separation are carried out at the same time. Once the mixing effect and separation effect reach a certain equilibrium state, the degree of mixing has been determined. Even if the mixing continues, the mixing effect will not be improved, but it will be Separation due to excessive mixing. The mixing time should be determined according to the combination of the mixer model and its manufacturing level, the physical characteristics of the material, and the actual test results. It is not the same concept as the length of time required for the simple model itself. When the mixer is used for a period of time, various parameters may change, so it is necessary to check and test regularly, and adjust the time required for mixing according to the inspection results.

5. The operation method is very important when mixing the feed　　

For the production of additive premix, the mixing method should be gradually expanded from micro mixing to small mixing to medium mixing and then to large mixing.

The correct order of addition of materials should be: the components with large proportions are added first or most of them are added to the machine, and then a small amount and trace components are added to it; in various materials, the particle size is generally The large components are added to the horizontal cattle feed mixer first, and then added to the small particle size; when the specific gravity difference between the materials is large, the material with the small specific gravity is generally added first, and then the material with the large specific gravity is added.

For a fixed container mixer, the cattle animal feed mixer horizontal should be started before feeding to prevent full-load starting, and the material must be unloaded before it can be stopped; while for a rotating container mixer, the mixer should be started after feeding, and then shut down. , After unloading; for the V-type mixer, the feed should be fed from two feed ports respectively.　

Measures should be taken to minimize the influence of other factors on the uniformity of the finished mixture: it is best to press the mixed material into granules immediately, so that the various components of the material are fixed in the granules or directly packed in bags; avoid Or minimize the transportation and drop of the mixed materials; minimize the loading and unloading work after mixing; minimize the falling, rolling or sliding of the materials; the mixed storage bin should be as small as possible, and the mixed conveying equipment preferably a belt conveyor.

In order to ensure the mixing quality, the running performance of the cattle feed mixer should be checked regularly, the bearings and the joints of the movable shafts should be frequently added with lubricating oil, the worn parts should be repaired and replaced in time, and the best one should be correctly determined according to the results of the uniformity sampling Mixing time. Frequently check the operation of each switch, clean up the debris in the cow mixing machine, remove residual materials around the door switch, make the door switch flexible, and prevent material leakage.