Liquid Adding System
In modern industry process, adding liquid on powder happens a lot. Non gravity mixer can add liquid with wide range of viscosity and oil or wax type, and especially it is excellent effect in oil coating. The method to add liquid to powder is divided into active input and passive input, and according to the physical properties of powders or liquids, the design condition differs.
Design condition
absorption capacity of powder
size of particles of powder
viscosity and input amount of liquid
F.D,B System
IIn case of adding liquid to powder, there is a tendency for materials to get crushed. To prevent this agglomeration, it maximizes the uniformity of material with F.D.B. It is high-speed body of revolution, and stimulates uniform connection between powder and liquid through forming material film on higher part of mixing room.
   
Pin Mill System
In case of mixing powder that requires particle crushes by shearing, Pin Mill System is consisted with fixed cover attached with Pin on two F.D.B. When adding liquid, in case of material with strong self cohesion and hygroscopicity, the best uniform mixture can be obtained.
 
n case that powder particle is finer than liquid (No more than 10), the agglomeration of material increases greatly, so you should be careful in liquid particles than powder. N.P.C(New Power Crushe) is high speed body of revolution that crushes blocked materials or crystal of powder particles, it can contribute to the simplifying work of complicated industrial process.
 
Study on segregation phenomena and attachment prevention in mixing particles
In mixing process of most feed and food, the quality of mixing can be raised by clearing segregation in the course of mixing by binding particles to coarse particle by adding sticky liquid such as Vegetable oil, Fat, Molasses. This method of adding binder to liquid type can be applied in mixing powder in feed as well as overall industry.

However, this sticky liquid breaks up mixing process by building up material by sticking to casing part of mixer. However please concentrate on that these problems can be solved with proceeding way of mixing, operation of equipment and design, and Non gravity mixer solves the problems (attachment of material, breakage, and heat generation etc) when adding liquid on the basis of unique technology and experience.
 
Most feed is divided into various sizes of particles, and differences in diameter and density cause segregation during the course of mixing. In this case particles has characteristics that are not mixed well by uniting themselves.
 
For example, in case of Selenium, it is input to most feeds by 0.4ppm(0.4gr/ton), and in case that 10 times of standard amount, so as to 4ppm is input into a part of feed without being mixed uniformly, the animal that is feed this can meet a serious problem.

Therefore, this kind of diffusion (also, mixture) of particle atom such as selenium should be done very delicately, and to overcome this problem even partly, before performing main mixing, sometimes pre-mixing is done such as minerals and vitamins. In these cases, also, the particles of premix should be mixed perfectly with mesh feed.
 
Even after finishing this mixing, danger about segregation is continued, and the emission of material is important too. Among this emission, to prevent segregation phenomenon, emission should use "Bottom Drop" or "Bottom Door" method. Also, even when filling mesh feed or unpelled material into silo, you should pay attention to segregation, and the most important thing is that you should not fill materials in shape of corn or hill.

If material is filled in corn shape, material¡¯s particles flocks in the center according to the difference in density and diameter, it is filled in tree shape, and the flow of materials becomes cone flow or central flow, and also the material of central post would come out first. In this core part, only the density of premix becomes high, and although the amount of medicines and minerals is not fetal, it can make some limitations in activity of animals.
 
As a method to prevent segregation of particles in feed mixture, there is an addition of a binder such as oil or molasses into materials.

This makes relatively fine particle in mixture to attach on big particle by coating the surface of relatively big particle and making it sticky. Then when dumping to silo, it can prevent segregation as minute particle drops in condition of sticking to big particle. It was proved that it is saved as more uniform mixture than the mixture that sticky liquid is not added in saved condition through several experiments.

Kansas state university of America confirmed the advantage of mixing effect in sticky liquid(Sticky Liquid, Binder). However, the problems so far are to add liquid not to built up more in mixer when adding and mixing other liquids such as molasses or solidified fat, and vegetable oil etc. If this case happens, mixing would happen partly, but it would lose the function as overall mixer.
 
Now a premix manufacturing company in a foreign country is adding molasses as binder into ribbon mixer, and in the ribbon mixer, mixing happens in the backside of ribbon as the principle in other ribbon mixer.

At this time, the problem is molasses and mixture becomes like wing of airplane by attaching on the back of ribbon, and after some hours, mixer stopped mixing, and the production chief input 2 persons to clean the mixer for two hours for only few hours mixing work. Also as the company uses limestone as premix excipient, abrasion on ribbon is so serious. The task of the Norway company is to add sticky liquid into mixer, not damaging the function of the machine.

On the other hand, a premix manufacturer in Denmark who use ¡°Non gravity mixer¡± to add similar amount of molasses cleans only once in a week to prevent the material to be built up in mixer. The mixing in ¡°Non gravity mixer¡± is happening at the center not happening at the edge like ribbon mixer, even though molasses are built up in paddle, it does not break up the mixing.

Relatively big amount of molasses can be added, and the best solution to minimize to build up in ¡°Non gravity mixture¡± is in the picture 1. According to this solution, to prevent direct spraying of molasses or binder on paddle system, Flow Distortion Bar (F.D.B) sprays material towards body before liquid sticks to mixer, and it prevents material from sticking or caking on the wall or other part greatly.

In case of Molasses, it is usually added by spray automization, and there are two ways to spray in most effective way.

Firstly, to ease automization by increasing fluency by heating molasses.

Secondly, there is a way to dilute molasses with 10% water, and the better spray nozzle diffuses, the better material is absorbed unto mixer without being built up. However, to diffuse and mix sticky liquid in the most effective way, other operation besides general operation is needed.

The first solution is to over-fill 40% into mixer. For example, 2,000L ¡°Non-gravity mixer¡± is general feed material, and should load material with 1.2 ton, and in this case, mixing time and mixing cycle get longer a little. These over time is differentiated according to the amount of liquid, and if you want to only bind or interlock small particle and large particle, it is possible with only approximately 2% of liquid. At this time, it takes about 90sec for mixing including filling, mixing, liquid adding and emission.

In this case, the theological amount of mixer is 48ton/hr, and to get his productivity, it is required to divide dosing system into 3 or 4 at least not measuring with a big scale. This method can measure more accurately as it can measure in small unit. The technology to prevent direct spraying of mixer¡¯s liquid through flowing is helpful to diffuse relatively small particle and liquid in mixture perfectly.

Also, the material such as limestone(bigger particle than about 850) that is crushed into relatively big particle has so big ¡°internal friction¡± during the overall process of mixing, it seems to be able to spray directly to mixer without F.D.B, but as it has so big interior friction force, it should increase power when adding driving force or sticky liquid. No material has problem in mixing within ¡°Non gravity mixer¡±.

However, the important thing is how to add liquid not to stick to wall or other parts, and if it can be solved, more than two nozzles can be used.
 
The limitation in adding molasses into mixer depends on the absorption ability of mixture about molasses, and if molasses has relatively big particle as pellet, the particle becomes sticky easily. However, in case of particle, the smaller is particle, the bigger the surface area becomes. So the absorption ability on the surface of particle would become high. In case of most feed, the relatively minute particle of mixed material can absorb relatively high-density sticky liquid. However, in case of high density, more time is required to mix, therefore, productivity can be reduced.

Now, for pellet press, ¡°Non-gravity mixer¡± that mixes by adding 7% molasses in mesh or meal are being used a lot. If you would like only to bind the particle of mixture to improve the stability of product, it is possible only adding 2% molasses, and ¡°Non gravity¡± is used a lot for this usage. In any cases, it is important how to operate sticky liquid to improve the final quality or overall function of mixer.
 
As discussed in advance, there are several elements to obstruct uniform mixing in mixing process. And among those, the difference in density and diameter are divided into the most important factor.

Also when adding liquid, the problems of solidification of material by viscosity that was serious before, and other problems such as mechanical loading, cleaning, and maintenance of machine are becoming serious problems in powder mixing in several industrial fields as well as feed industry.

These problems can be solved perfectly how to operate and mix liquid. We are certain that ¡°Non gravity mixer¡± would solve these problems with rich technology and experience.