1HR-2000 typeInstrument Introduction

HR-2000The multifunctional powder physical property tester (also known as the powder comprehensive property tester) is a testing instrument developed based on the requirements of the American ASTM D6393-99 standard (Standard Test Method for BulkSolids Characterization by Carr Indicators) and with reference to the main technical indicators of Chinese national standards GB/T 5162-2006/ISO 3953:1993 (Determination of tap density of metal powders), GB/T 1482-2010 (Determination of flowability of metal powders by standard funnel method), GB/T 1479.1-2010 (Loose density of metal powders - Funnel method), and GB/T 16913.3-2008 (Determination of loose density by natural packing method), for evaluating the comprehensive physical properties of powders. The sentence is:.

The testing items of this instrument include the tap density, bulk density, angle of repose, spatula angle, collapse angle, dispersion and other items of the powder. The calculation items include differential angle, porosity compressibility (compression ratio), flowability index, jet flow index, and other items. Its characteristics are multi-purpose, easy to operate, good repeatability, easy to change measurement conditions, and complete matching. Its successful development provides a new testing method for the widespread testing of powder properties.

IIHR-2000 typeMain performance indicators:

IIIHR-2000 typeThe main application areas are:

Including fields such as pharmaceuticals, battery materials, powder coatings, non-metallic minerals, graphite, food, non-ferrous metals, powder engineering design, powder property research, and teaching.

4、 The instrument tester attempts to:

Schematic diagram of angle of repose testing process:

five、HR-2000 typeTesting and calculation projects and concepts:

• Angle of repose:In a state of static equilibrium, the acute angle between the inclined plane of natural powder accumulation and the horizontal plane at the bottom is called the angle of repose. It is formed by the natural fall of powder onto a specific platform through electromagnetic vibration. The size of the angle of repose directly reflects the flowability of the powder, and the smaller the angle of repose, the better the flowability. The larger the angle of repose, the poorer the fluidity. The angle of repose, also known as the angle of rest or natural slope angle.
• Collapse angle:The collapse angle refers to the phenomenon of collapse on the surface of the accumulated powder when it is impacted by a certain external force during the measurement of the angle of repose. The acute angle between the inclined plane of the accumulated powder and the bottom horizontal plane after collapse is called the collapse angle. The smaller the collapse angle, the better the flowability of the powder.
• Differential angle:The difference between the angle of repose and the angle of collapse is called the differential angle. The larger the difference angle, the stronger the splashing of the powder.
• Flat panel angle:The average angle between the free surface (inclined plane) and the horizontal plane of the powder buried in the naturally accumulated powder and the angle after being subjected to a certain impact is called the plate angle. The smaller the angle of the plate, the stronger the flowability of the powder. Generally, the angle of the flat plate is greater than the angle of repose. Flat corner is also known as spatula corner.
• Vibration density:Compaction density refers to the intensity, frequency, and duration of vibration applied to a specific container after a certain weight (or volume) of powder is loaded, in order to compress the gaps between powder particles and keep them in a compact state. The density of the powder at this point is called tap density.
• Loose density:Loose density refers to the density of a powder in a specific container when it is naturally filled.
• Compression degree:Compressibility refers to the ratio of the difference between the tap density and the bulk density of a powder to its tap density. The smaller the compression degree, the better the flowability of the powder. Compression ratio, also known as compression ratio.
• Dispersion:The percentage of a certain amount of powder that floats out of the receiving tray after being dropped from a certain height to the total amount of powder added. Dispersion refers to the degree of dispersion of a powder in the air. The dispersibility is related to the dispersibility, floatability, and splatter of the powder. If the dispersion exceeds 50%, it indicates that the sample has a strong tendency to float.
• Void ratio:Void ratio refers to the percentage of voids in a powder that accounts for the entire volume of the powder. The porosity varies due to factors such as particle shape, arrangement structure, and particle size of the powder. When the particles are spherical, the porosity of the powder is40%about; When the particles are ultrafine or irregularly shaped, the porosity of the powder is70-80%Or higher.
• Uniformity:Uniformity isLaser particle size analyzer or image analyzerD calculated from the obtained particle size distribution₆₀And D₁₀The ratio. Mostly used for coarse powders with low cohesiveness.
• Agglutination degree:Agglomeration degree is an explanatory measurement index for the internal stress of particles based on the characteristics exhibited by the powder during sieving. The higher the degree of aggregation, the poorer the flowability of the powder. Agglomeration degree is applicable to fine powders or micro powders that are prone to agglomeration.
• Liquidity index:The liquidity index is a weighted sum of indices such as angle of repose, compressibility, flatness, homogeneity, or cohesion. The liquidity index is related to compressibility.
• Jet flow index:The jet flow index is a weighted sum of indices such as liquidity index, collapse angle, divergence angle, and dispersion.
• six、Powder flowability index：

• The degree of liquidity	Total liquidity index	angle of repose		Compression degree		Flat panel corner		Homogeneity		Agglutination degree
  		test value	Index 1	test value	Index 2	test value	Index 3	test value	Index 4	test value	Index 5
  ZH	90-100	<25 26-29 30	25 24 22.5	<5 6-9 10	25 23 22.5	<25 26-30 31	25 24 22.5	1 2-4 5	25 23 22.5
  quite good	80-89	31 32-34 35	22 21 20	11 12-14 15	22 21 20	32 33-37 38	22 21 20	6 7 8	22 21 20
  good	70-79	36 37-39 40	19.5 18 17．5	16 17-19 20	19.5 18 17．5	39 40-44 45	19.5 18 17.5	9 10-11 12	19 18 17.5
  average	60-69	41 42-44 45	17 16 15	21 22-24 25	17 16 15	46 47-59 60	17 16 15	13 14-16 17	17 16 15	<6	15
  Not good	40-59	46 47-54 55	14.5 12 10	26 27-30 31	14.5 12 10	61 62-74 75	14.5 12 10	18 19-21 22	14.5 12 10	7-9 10-29 30	14.5 12 10
  not good	20-39	56 57-64 65	9.5 7 5	32 33-36 37	9.5 7 5	76 77-89 90	9.5 7 5	23 24-26 27	9.5 7 5	31 32 -54 55	9.5 7 5
  very poor	0-19	66 67-89 90	4.5 2 0	38 39-45 >45	4.5 2 0	91 92-99 >99	4.5 2 0	28 29-35 >35	4.5 2 0	56 57 79 >79	4.5 2 0