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Classification and application of powder mixer
Date: 2020-10-15     |    Viewing Count: 523

Part 1: At present, the commonly used powder mixers mainly include: 3D mixer, V-type mixer, and double cone mixer.

(1) 3D mixer 

Working principle: 

the loaded barrel is driven by the active shaft to perform repeated translational, rolling, and tumbling motions to promote the circular, radial and axial movement of the material along the barrel. The three-way compound movement completes the mutual movement, diffusion, accumulation and doping of various materials to achieve the goal of uniform mixing. 

Advantages: 

there is no dead corner of the material in the barrel. 

Shortcomings: 

the loading and unloading rate is low, generally not exceeding 60%; regarding ultra-light powder and ultra-fine powder, it is not easy to mix uniformly, and it is easy to float above the barrel, and it is difficult to reach the particles and the particles to mix evenly.

(2) V-type mixer

Working principle

the two cylindrical barrels of the mixer are not equal in length to form an asymmetric principle. When the mixer rolls, the materials change from differentiation to combination, from combination to differentiation, and promote the horizontal exchange of materials. Each roll of lateral force causes part of the material to flow from one barrel to another, so that the material is mixed horizontally and radially, and the differentiation and combination proceed with each other, so that the material reaches a uniform mixing effect.

Advantages: 

when mixing materials with good mobility and similar physical properties, a better mixing effect can be obtained. 

Shortcomings:  

when the physical properties of the mixed powder materials differ greatly, the ideal mixture is generally not obtained; the energy consumption is large; the particles collide with each other and the friction is large, and the basic characteristics of the powder components are easily changed, such as the particle size becomes smaller , Particle shape changes.


(3) Double cone mixer

Working principle: 

the powder is added to the double cone bucket. With the continuous rotation of the barrel, the materials are in the container for random impact movement, and the effect of uniform mixing is achieved.

Advantages: 

mixing process can be done quickly.

Shortcomings: 

when the rotation speed is too slow, the material is easy to roll in layers, unable to blend quickly, and easy to form spherical agglomerates.


Part 2:Different mixer aplication scope:

(1) 3D mixer is widely used in medicine, chemical industry, food, feed, pesticide and other industries. It is not only suitable for mixing general powder materials, but also for mixing materials with high oil content, high sugar content, high viscosity, inflammable, explosive, temperature curing and temperature softening. Such as medicine, powder coating (premix and product mix), leveling agent, food additive, etc., and can be used with the production line.

(2) V-type mixer is suitable for mixing more than two kinds of dry powder and granular powder materials, especially for trace additives. It is widely used in pharmaceutical, chemical, food, plastic, cosmetics, ceramics, metallurgy and other fields.

(3) Double cone mixer is suitable for solid and solid, solid and liquid, liquid and liquid mixing, widely used in chemical industry, dyestuff, petroleum, metallurgy, building materials, rare earth and other fields. The cone mixer will not overheat the thermosensitive materials, will not press feed and grind the granular materials, and will not produce the phenomenon of chip separation and segregation when mixing the materials with large contrast weight and different particle size.