Mixing is an indispensable production process for modern industry. With the continuous development of Chinese industry, the development of mixing systems and mixing equipment will become more and more powerful.Mixing is used in the entire industrial field, such as chemicals, food, building materials, pharmaceuticals, and fertilizers. The products we use every day have at least one mixing process in the production.
There are many types of powder mixing equipment. This article mainly analyzes the commonly used equipment in the Chinese market in mechanical mixing equipment.
1、Three-dimensional Mixing Machine
The mixing principle of the Three-dimensional Mixing Machine is gravity convection-diffusion mixing.
Advantages：
①Multi-dimensional space movement can make the material fully mixed and uniform macroscopically.
②No centrifugal force during mixing.
③Free of dead corner.
Disadvantages：
①Microscopically, it is not easy to achieve refined mixing.
②The kinetic energy of the powder is too large, and the ultra-light powder and ultra-fine powder are easy to float and not easily mixed into the main powder.
③Long mixing time, high power consumption, low loading rate.
④The operating acceleration is large, and there are bad records of broken shafts, and the equipment is not easy to expand due to safety issues.
⑤It is not easy to make large equipment with more than 1000 liters.
2、V series Mixing Machine
The mixing principle of the V series Mixing Machine is gravity convection and diffusion mixing.
Advantages：
①No dead corners of materials during mixing.
②When the mixed powder has good fluidity and similar physical properties, a better mixing effect can be obtained.
Disadvantages：
①Microscopically, the powder is not easy to mix well.
②Ultra-fine powder and ultra-light powder are not easy to mix into the main powder.
③There is gravity lifting movement, so power consumption is high.
④There is a throwing motion, which will destroy the shape of the powder.
3、Dual Cone Mixing Machine
The mixing principle of the Dual Cone Mixing Machine is gravity convection diffusion mixing.
Advantages：
①The dual cone cylinder adapts to the mixing requirements of the mixed materials without dead angles.
②The gentle running speed will not cause damage to fragile materials.
③It can meet the production of large batches of batch mixing.
Disadvantages：
①Refined mixing cannot be achieved.
②Low mixing efficiency and long mixing time.
4、Horizontal Ribbon-spiral Mixing Machine
The mixing principle of the Horizontal Ribbon-spiral Mixing Machine is forced shear mixing.
Advantages：
①Large loading factor, small occupied area.
②There are shearing blades inside to achieve uniform mixing at the microscopic level.
③According to the output demand, the equipment can be made into a mainframe, and the price is relatively cheaper than other mixers.
Disadvantages：
①If the bucket is fixed, there will be dead corners of the material.
②The starting load of the equipment is extremely large, and it is difficult to start at full load, which is time-consuming and electricity-consuming.
③There are residues in the discharge.
The selection of mixing equipment is based on as follows:
First, select targeted mixing equipment according to the basic characteristics of the materials to be mixed;
Second, choose mixing equipment with different mixing capabilities according to the requirements of mixing uniformity.
一、For powders with poor fluidity, you can select a forced shear mixing mixer
1、Cause Analysis
Powders with poor fluidity often occurs in food industry. Because of poor fluidity, the particles inside the powder move slowly, which affects the mixing effect, the impeller with stirring needs to be forced to shear and stir inside the powder, so as to overcome the mixing difficulties caused by poor fluidity.
2、Representative models
Ribbon-spiral Mixing Machine
Advantages：High mixing efficiency; the powder particles are relatively uniform on the microscopic level.
Disadvantages：Mixed with dead angles; equipment energy consumption is high
For powders, the equipment is required to have: good mixing uniformity, no dead angles, high mixing effect, low power consumption, etc.
The mixing equipment is required to not destroy the physical indicators of the powder, such as the specific gravity, average particle size and particle surface shape of the powder, etc.
It is also required that the mixing equipment is safe and easy to operate, energy-saving, and labor-saving.
二、For powders with good fluidity, you can select a gravity convection-diffusion mixer
1、Cause Analysis
When mixing metal powders with good fluidity, V series machines, Three-dimensional machines, etc. are often used. This is because the powder has good fluidity, and its convection diffusion speed will be fast and efficient. Using a convection diffusion mixer can take advantage of the high mixing efficiency of the mixer.
2、Representative models
Three-dimensional Mixing Machine and V series Mixing Machine
Advantages: mixing without dead angles; macroscopically, the powder in each part of the container is uniform.
Disadvantages: Microscopically, the mixing uniformity of powder particles is insufficient; the mixing effect is low.
