Standard powder for negative pressure sieve analyzer

Do you have stock available	yes	Certification	yes
Brand:	Building Materials Institute	Scope of application:	reference material
Classification:	reference material	Category:	reference material
Model:	0.080mm	Specifications:	0.080mm
Trademark:	China National Building Materials Institute	Packing:	plastic box
Output

Fineness of fly ash, fineness of cement, specific surface area standard powder, standard substance 0.080mm standard value: 0.28% 0.045mm standard value: 4.25% density value: 3.08g/cm3 Brinell specific surface area standard value: 3710cm3/g Negative pressure sieve analyzer uses standard sieve calibration sample 1 to regularly pour out the cement in the dust collection bottle. If the negative pressure does not meet the national standard requirements (-4000~-6000 Pa) after a period of use, please clean the dust bag in the vacuum cleaner. The vacuum cleaner should not work continuously for more than 15 minutes, otherwise it may overheat and burn out. Cement negative pressure sieve analyzer, cement physical inspection instrument standard sieve GB6004, test sieve with metal wire woven square hole mesh 3 method principle. This standard uses an 80 μ m sieve to conduct sieve analysis test on cement samples, and the fineness of the cement sample is expressed by the percentage of the mass of the sieve residue obtained on the sieve mesh to the original mass of the sample. 4. Cement negative pressure sieve analyzer instrument 4.1 Test sieve 4.1.1 The test sieve consists of a circular sieve frame and a sieve mesh, which complies with SSW0.080/0.056GB6004 and is divided into negative pressure sieve and water sieve. Its structural dimensions are shown in Figure 1 and Figure 2. The negative pressure screen should be equipped with a transparent screen cover, and the upper opening of the screen should have good sealing. 4.1.2 The screen mesh should be tightly attached to the screen frame, and the contact area between the screen mesh and the screen frame should be sealed with waterproof glue to prevent cement from being embedded. 4.1.3 The inspection method for sieve size shall be carried out in accordance with Chapter 4 of GB6004. 4.1.2 Negative pressure sieve analyzer 4.2.1 The negative pressure sieve analyzer consists of a sieve seat, a negative pressure screen, a negative pressure source, and a dust collector. The sieve seat is composed of a jet nozzle with a speed of 30 ± 2r/min, a negative pressure gauge, a control board, a micro motor, and a housing, as shown in Figure 3. 4.2.2 The adjustable range of negative pressure for the sieve analyzer is 4000-6000Pa. 4.2.3 The distance between the upper surface of the jet nozzle and the sieve mesh is 2-8mm. 4.2.4 The upper opening size of the jet nozzle is shown in Figure 4. 4.2.5 Negative pressure source and dust collector, consisting of an industrial vacuum cleaner with a power of 600W and a small cyclone dust collector, or other equipment with equivalent functions. 4.3 Water sieve frame and nozzle The structural dimensions of the water sieve frame and nozzle shall comply with the provisions of Articles 2.3-2.7 of GB3350.7, but the inner diameter of the sieve seat+3 on the water sieve frame is 140mm. 04.4 The maximum weighing of the balance is 100g, and the division value is not greater than 0.05g. 5 Sample processing: Cement samples should be thoroughly mixed, passed through a 0.9mm square hole sieve, and the residue on the sieve should be recorded to prevent mixing with other cement during sieving.