Powder comprehensive characteristic tester

Powder comprehensive characteristic tester Model: LN-DHYL-1000 Article number: ZH6875 Product introduction: Powder comprehensive characteristic tester A test instrument used to evaluate the comprehensive physical characteristics of powder. Because the powder is in a static state or a flowing state, it is a two-phase system. The characteristics of the particles themselves and the friction between the particles will produce some special flow characteristics. Studying these characteristics is of great significance to the work of powder processing, transportation, packaging, storage and so on. The instrument is characterized by multi-purpose machine, flexible and diverse measurement conditions, easy operation, good repeatability, suitable for multiple standards, etc. The successful development of the instrument provides a new method for the universal development of evaluation of powder comprehensive characteristics testing in scientific research, industrial production and other fields. The test items of the instrument include parameters such as tap density, loose density, angle of repose, collapse angle, flat plate angle, dispersion degree, etc. Through the above test data, indicators such as difference angle, compressibility, porosity, and uniformity can be obtained. The parameters such as fluidity index and spoutability index are obtained through the Karl index. 1. Measurement items and definitions: 1) Vibration density: Vibration density means that after the powder is filled in a specific container, the container is vibrated under certain conditions, thereby destroying the voids in the powder and leaving the powder in a tightly packed state After the density, the tap density of the powder is generally less than the true density of the single particles in the powder. 2) Bulk density: Bulk density refers to the density of powder after filling a specific container naturally under specified conditions. When testing the bulk density, no external force such as vibration should be applied. This indicator is important for the design of storage containers and packaging bags. 3) Angle of repose: the free surface of the powder accumulation layer, under static equilibrium, the maximum angle formed with the horizontal plane is called the angle of repose. It is formed by letting the powder naturally fall onto a specific platform in a specific way. The angle of repose has the greatest influence on the fluidity of the powder. The smaller the angle of repose, the better the fluidity of the powder. Angle of repose is also called angle of repose, natural slope angle, etc. 4) Collapse angle: Give the accumulated powder measuring the angle of repose a certain impact force to make the surface collapse, and the bottom angle of the remaining powder cone is called the collapse angle. 5) Flat plate angle: The flat plate buried in the powder is lifted up vertically. The average value of the angle between the free surface (inclined surface) of the powder on the flat plate and the flat plate and the angle after being shaken is called the flat plate angle. In the actual measurement process, the angle of the flat plate is expressed as the average of the angle after the flat plate is lifted and the angle at which the unstable powder is removed after the flat plate is impacted. The smaller the plate angle, the stronger the fluidity of the powder. Generally, the plate angle is larger than the angle of repose. 6) Dispersion: The degree of dispersion of powder in air is called dispersion. The measuring method is to measure the percentage of the sample outside the receiving pan to the total amount of the sample after dropping the 10 g sample from a certain height. The degree of dispersion is related to the dispersibility, floatability and splashability of the sample. If the degree of dispersion exceeds 50%, the sample has a strong tendency to splash. 2. Calculation items and definitions: 1) Difference angle: The difference between the angle of repose and the collapse angle is called the difference angle. The larger the difference angle, the stronger the fluidity and sprayability of the powder. 2) Compression: the ratio of the difference between the tap density and loose density of the same sample to the tap density is the compression. The degree of compression is also called the compression ratio. The smaller the degree of compression, the better the fluidity of the powder. 3) Porosity: Porosity refers to the percentage of voids in the powder to the entire volume of the powder. The porosity varies depending on factors such as the particle shape, arrangement structure, and particle size of the powder. When the particles are spherical, the porosity of the powder is about 40%; when the particles are ultrafine or irregular, the porosity of the powder is 70-80% or higher. Instrument configuration: one vibration-reduction table, one angle of repose, one sample position of collapsed angle, one vibration density assembly, one vibration density measuring cylinder (100ml, 50ml, 25ml), 4 metal powder loose density funnels, 2 general loose packages Density measuring cup (100ml) 1 metal powder loose density measuring cup (25 ml) 1 loose density measuring cup positioning table 1 scraper ruler 1 overflow tray 1 dispersion receiving tray 1 brush 3 A lifting table handle, a vibrating screen (F75mm), 3 sample spoons, 1 blocking rod, 1 user-supplied equipment: 1 electronic balance, 1 drying box, 1 vacuum cleaner, 1 set

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