JB/T 9014.4-1999 Determination of density of bulk materials in continuous conveying equipment

JB/T 9014.4-1999 JB/T 9014.4-1999 Determination of density of bulk materials in continuous conveying equipment JB/T9014.4-1999 Standard download decompression password: www.bzxz.net

JCS53.040.01
Machinery Industry Standard of the People's Republic of China
JR/T9014.1~9014.9-1999
Continuous bandling equipment
Loose bulk material-Perfortmianceand determination
Continuous bandling equipmentLoose bulk material-Perfortmianceand determination1999-06-28 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB.T9014.4—1999
This standard is a revision of6-20
3.. For granular and dusty materials with a particle size less than G.5mm, use a two-type circular bucket and a reverse measurement to reach a sample level. Connect the material or the barrier to the bucket continuously and gently balance the material. The material must be filled with a moving hook and the bottle must be filled with 40-8 volumes of material. The product is allowed to move, hold and push the product. Gently use a steel plate to balance it. The excess material on the top of the cup is clear. Collect the material on the scale to show the quality of the cup ( Accurate to 0.05.3.3.4 For materials with an accuracy of less than 0.5mm, use a sampling spoon or the method of placing the material into the sample container as specified in 3.2d. Select a wide sample box and take samples from a sample container 15m away. Let the sample fall into the sample container without signing the sample container. After it is filled, the sample container will be located on the surface of the sample container. After that, use a ruler to mark the two sides of the sample container. Check the small material on the surface and weigh the mass of the sample container. 3.4 Calculate the stacking gradient (accurate to the second digit after the center point):
In the formula:
- bulk density, eicm(timt:
m, -mu
FB/T9014.4-1999
Material weight and mass of the measuring cup (or bulk density screen), m.-The mass of the measuring cup (or bulk density screen), 5: The volume of a measuring cup (or bulk density screen) after verification, \. 3.5 Result evaluation
Take three tests for reference. If the difference between the magnification value and the minimum value is greater than 5% of the average value, it must be repeated. 3.6 Test report
According to [H190 [4.2-1999 3.6 requirements to submit a test report. 4 Determination of filling density
4.1 Key points of the method
The ten materials are placed in a container in a certain way of softness and compaction to determine the density of the material. 4.2 Tools and instruments
) Scale: Maximum weighing pan 501g (sensitivity 50g): b) Balance: Large weighing skg (sensitivity n.05g;) Oven: Maximum operating humidity 200, and With automatic temperature control and ventilation device; J) Container: metal products, see the table for the selected specifications!; e) Drying rack, shallow porcelain tray with cover:
↑ Material shovel, brush, etc.
4.3 Test steps
4.3.1 Take material samples according to Table 2
4.3.2 Put the prepared material samples into the oven and bake until they are heavy, divide them into 3 parts, and set them aside. 4.3.3 Put the dried material samples into three layers and put them into the weight container. Each layer is placed in the cylinder. For the sample with a bottom diameter of 25mm, hold the cylinder and shake it 25 times each side, then compact it with a heavy iron (5k) slightly smaller than the diameter of the cylinder, and add the second layer and the first layer in turn according to the ratio method. After filling, roll along the cylinder mouth with a nitrogen gauge to remove the material that is slightly higher than the door, and level the concave part, and then weigh the mass of the heaviest material.
4.4 Calculation of the result
The actual density is calculated by formula (2) (accurate to the second decimal place) P. -
Where: p,——actual density, gicm (tm); bulk density cylinder and mass of material sample. B: ,——Bulk density means the verified mass, B;
F is the verified volume of the bulk density, m,bzxZ.net
4.5 Result evaluation
Take the arithmetic mean of three tests. If the difference between the maximum value and the minimum value is greater than 5% of the average value, the test must be repeated. 4.6 Test report
Submit a test report in accordance with 3.6 of B/19014.2-1999: 2n
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