Intelligent environmental protection fly ash cement negative pressure screening analyzer

The FYS-150 cement fineness negative pressure sieve analyzer is a specialized instrument for testing cement fineness according to the national standard CB1345-91 (cement fineness testing method 80uM sieve analysis method). It has the advantages of simple structure, easy operation, and reduced energy consumption. It is used in cement plants, construction companies, as well as research institutes and colleges with cement majorsThe instrument.

Main technical parameters of FYS-150 cement fineness negative pressure sieve analyzer

1. Mesh hole edge length: 0.08mm

2. Negative pressure screen inner diameter: Φ 150mm

3. Negative pressure screen height: 25mm

4. Negative pressure adjustable range: -4000 to -6000Pa

5. Screening time automatic (adjustable control range) 0-599 seconds

6. Jet nozzle speed: 30r/min

7. Negative pressure source power: 900W

8. Dimensions: 400 × 430 × 800mm

Intelligent environmental protection fly ash cement negative pressure screening analyzer

Precautions

1. Regularly pour out the cement from 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.

3. The vacuum cleaner should not work continuously for more than 15 minutes, otherwise it may overheat and burn out.

Experimental steps

1. Before sieve analysis test, adjust the digital display time relay to set it at 120s, then put the negative pressure sieve on the sieve seat, cover the sieve cover, turn on the power supply, adjust the negative pressure to -4000~-6000pa, and then turn off the machine.

2. Weigh 25g of the sample, place it in a clean negative pressure sieve, cover the sieve cover, restart the instrument, and continuously sieve. During this period, if the sample adheres to the sieve cover, gently tap the sieve cover to make the sample fall. After 120 seconds of sieve analysis, the instrument will automatically stop.

3. After sieving, use a balance to weigh the remaining material.

Intelligent environmental protection fly ash cement negative pressure screening analyzer

working principle

The FSY-150 cement fineness negative pressure sieve analyzer uses air flow as the power medium for screening. During operation, the entire system maintains a negative pressure state, and the powder material to be tested in the sieve is in a fluid state under the action of the air flow sprayed by the rotating jet nozzle, and moves together with the air flow. Among them, coarse particles with a diameter larger than the sieve aperture remain in the test sieve, thus achieving the purpose of screening. A small cyclone dust collector is used in the screening system to collect fine particles passing through the sieve from the airflow, with a collection rate of over 95%.

Structure and principle of FYS-150 cement fineness negative pressure sieve analyzer

The negative pressure sieve analyzer mainly consists of a box, a sieve seat, a bucket vacuum cleaner device, and a digital time controller.

The sieve seat is equipped with a synchronous motor, nozzle, hard tube, etc., on which the test sieve and sieve cover are placed. The lower end of the hard tube is connected to the cyclone inlet with a flexible hose, and there is also a small opening connected to the negative pressure gauge with a flexible hose.

The bucket vacuum cleaner serves as a negative pressure source, with its suction port connected to the outlet of the cyclone tube. Its motor can be infinitely adjusted through the pressure adjustment knob on the panel to change the working negative pressure of the instrument at any time.

The cyclone dust collection device consists of a cyclone tube and a dust collection bottle. The configuration of the cyclone tube mouth greatly improves the dust collection efficiency, allowing 95% of cement dust to fall into the dust collection bottle, thereby reducing the frequency of dust cleaning for the vacuum cleaner.

The digital time controller consists of a digital display screen and a timer. On the one hand, it displays the working time, and on the other hand, it enables the instrument to automatically stop after working for 2 minutes.

After the negative pressure screening is started, the vacuum cleaner and synchronous motor start to work, keeping the screen seat in a negative pressure state. The cement fine powder to be tested on the test screen becomes dynamic under the action of the airflow sprayed from the nozzle. The fine powder with a particle size smaller than the sieve aperture is sucked away by the negative pressure suction through the test screen, while the fine powder with a particle size larger than the sieve remains on the test screen, thus completing the screening and meeting the test requirements specified in GB1345-91.