Round powder screening sieve is an instrument for measuring the thickness of flour. It has been developed and produced according to GB/T 5507-2008 "Food Oil Inspection - Powder Thickness Measurement" national standards, and has great applicability. The circular powder sieve is suitable for the detection of the processing precision of flour, starch, rice flour, compound feed and other powder materials. It can also be used to inspect whether the screening sieves and screens of these processing plants are damaged. It is the best measurement for determining the fineness of powders. equipment.
How is the circular pulverizer used in the end?
1. Operation steps: Place the powder screening screen on the horizontally firm test bench or table top. If the test bench or the table top is uneven, it will cause vibration of the powder test screen. Select the sieve grid according to the sieve number specified in the quality standard. Test flour is usually CB42, CB36, CB30, CQ27, CQ20, CQ16, CQ10. Starch and rice flour are tested with 80 mesh and 100 mesh sieves or standard textile screens; 4, 6, 8, 12, 16 are used for testing compound feeds. The standard textile screen. Put 5 rubber balls in each screen, then press the big hole screen on it, the small hole screen is on the bottom, the bottom is the screen bottom, the top is the order of the screen cover installed (only seven screens can be placed at a time). 50 g of sample (accurate to 0.1g) was sampled from the average sample (sampling amount was 50 g when testing flour, starch, and rice flour, and 100 g when the compound feed was tested) and placed in an upper sieve to hang a compact structure. (It should be noted that the compression on both sides is the same). Adjust the timer for 10 minutes (press the “+†and “-†buttons on the timer to adjust it to 10m00), turn on the power switch, and the powder tester will automatically stop at the rate of 260r/min for 10 minutes and then stop. At this time, it should be pressed again. Switch off the power supply and reset the time controller; remove each sieve layer, pick up the rubber ball, tilt the sieve grid, use a brush to concentrate the powder on the sieve to a corner, and pour out the weighing (less than 0.1g without weighing ).
2. Calculation of results: The thickness is expressed as the mass fraction of the powder remaining on the specified sieve layer, and is calculated according to the formula (1) (2): X1=(M1÷M)×100; X2=(M2) ÷ M) × 100; where: X1 - sample thickness (in mass fraction), (%); M2 upper sieve residue mass in grams (g); X2 - stipulate residue on the sieve layer The sum of the masses, in grams (g); M - the mass of the specimen, in grams (g); the allowable difference between the results of the double test does not exceed 0.5%, and the average is the result of the determination. Calculate the result of the measurement and keep one decimal place.
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