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Different screens

Release time:2019-11-13 From: Zhengnai Industry in China

Main components of single-axis inertial vibrating screen

The main components of the single-axis inertial vibrating screen are the screen frame and the single-axis inertial vibrator. The screen frame is mounted on the cylindrical spring or the plate spring. The lower side of the spring is fixed on the sieve frame, and the screen frame is mounted on the single shaft in the middle of the frame. Inertial vibrator drive.

Single-axis inertial vibrator

The single-axis inertial vibrator is composed of a transmission shaft and an eccentric weight. The transmission shaft itself is an eccentric shaft. When the eccentric shaft is rotated by a motor with high speed, a centrifugal inertial force is generated to cause the sieve to vibrate at a fixed frequency and amplitude.

graphite electrode for DC arc furnace

The graphite electrode used in the DC arc furnace has no skin effect when the current passes, and the current is evenly distributed on the cross section of the electrode. Therefore, compared with the AC arc furnace, the current density through the electrode can be appropriately increased,
 

Inertial vibrating screen for smaller granular materials

The inertial vibrating screen has a small amplitude but a high frequency. This single-axis inertial vibrating screen is suitable for sieving materials with small particle sizes and requires operation under uniform feed conditions.

Inertial vibrating screen has single layer sieve and double layer sieve

The inertial vibrating screen has two kinds of single-layer sieves and double-layer sieves. The former has only one layer of sieve mesh, so the mixed particles after crushing can only be divided into two sizes (the upper product and the sieve product), and the double-layer sieve has The two-layer screen divides the mixed particles into two size ranges.

Graphite electrode production

the production process is long, the production cycle is long, the production cycle of Regular power graphite electrode is about 45d, the production cycle of ultra-high power graphite electrode needs more than 75d, and the production cycle of nipples requiring multiple impregnation is longer.
 

The main body of the cylinder screen

The body of the cylindrical or pyramidal sieve is a circular or hexagonal tapered screen frame mounted on the main shaft, and a screened screen or wire braided screen is fixed to the screen frame.

Cylinder screening process

The material to be sieved is added from one end, and moves in the sieve frame along the screen toward the lower front with the rotation of the sieve. The particles smaller than the sieve hole leak into the storage bin below the sieve through the sieve hole, and the large particles that cannot be sieved are The other end of the sieve is discharged.
 

Measures to obtain different particles at the same time

In order to obtain particles of several different size ranges at the same time, different sizes of sieves can be placed in the full length section of the sieve. The sieves of small size sieve holes are placed close to the feed inlet, and the sieves of large size sieve holes are placed close to each other. The discharge opening and the cylindrical screen frame should be installed at an angle.
 

Classification of graphite electrode

Item Unit RP HP UHP
300-500mm 300-500mm 300-500mm
Electric resistivity Electrode μΩm 7.5-8.6 5.5-6.8 4.6-6.2
Nipple 4.5-6.0 4.0-5.5 3.5-5.0
Bending strength Electrode Mpa ≥7.5 ≥10.0 ≥10.5
Nipple ≥16.0 ≥18.0 ≥20.0
Elastic modulus Electrode Gpa ≤9.0 ≤13.0 ≤14.0
Nipple ≤13.0 ≤15.0 ≤20.0
Bulk density Electrode g/cm3 1.54-1.62 1.62-1.70 1.66-1.73
Nipple 1.70-1.78 1.72-1.80 1.75-1.82
CTE(100-600℃) Electrode 10-6/℃ 2.20-2.60 1.80-2.20 1.20-1.50
Nipple 1.50-1.90 1.50-1.80 1.10-1.40
Ash % ≤0.3 ≤0.3 ≤0.3

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