Powder fluidity test - powder properties analysis solution - Database & Sql Blog Articles

Powder fluidity test

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Powder characterization solution

First, the characteristics of powder representation

The intelligent powder tester is the general name for the analysis instrument of powder physical properties. All the characteristics of the powder are more to solve the problem that the powder often appears in the processing, storage, transportation and silo of the powder industry.

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The structure of the rat hole; if the compression arch is subjected to the pressure of the silo, the consolidation strength increases to cause arching; the 拱-shaped arch-like materials are in mesh with each other at the orifice bridge; the adhesive adheres to the arch moisture, and the electrostatic adsorption causes the powder and the silo Wall adhesion enhanced arching; air pressure balance arch: the unloading device is not well sealed, resulting in a large amount of air leaking from the bottom into the chamber to balance the upper and lower air pressure of the material layer; in the storage and delivery system of the powder material, the material Friction, material and material and solid wall friction; in the design of the hopper, the size of the discharge opening, the inclination angle of the hopper wall and the pressure of the powder on the hopper wall, the irrational design of the hopper will cause very much production Big difficulty

The different industry properties of the second powder

In the production process of metallurgical and non-metallic bulk materials such as powder metallurgy, food, pharmaceutical, metal, chemical, agricultural, etc., the flow of particulate matter is widely involved, such as silo unloading, transport, mixing, fluidization and solidification.

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Gas separation, etc., analysis of the flow characteristics of the particulate material is of vital importance for preventing powder clogging and controlling the uniformity and consistency of the particulate components;

Third, the analysis method commonly used in powder flow characterization

There are many analytical methods for powder flow characterization; we have the following four categories based on common generalized methods: traditional quantitative methods, shearing methods, drumming methods, and yield strength methods; each method characteristic and project will be described in detail below:

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Traditional quantitative methods,

This method is currently the most commonly used, and also the most simple and very intuitive measurement method, mainly based on the Karl index comprehensive evaluation of powder, measuring items are: tap density, bulk density, bulk density, angle of repose ( Item angle measurement, angle of wiper (flat plate angle), collapse angle, difference angle, mass flow rate, volume flow rate, dispersion, void ratio, etc. The material flow condition is comprehensively evaluated by Karl index and Hausnaby index.

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These test items can not accurately analyze the intrinsic properties of the powder, and more differences in the characterization are relatively large. The difference in test results is relatively large, but it is suitable for rapid analysis and judgment of the product quality inspection part; And the department, the data obtained is really very limited.

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