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Zhengnai Industry co., LTD

RP|HP|SHP|UHP|Graphite Electrode Suplier

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Sieved product

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

There are two ways to operate the ball mill.

Our company has a special storage warehouse and storage method to ensure the safety of graphite electrode storage
  • 1. Continuous production, that is, continuous feeding from one end, continuous discharge of the pulverized powdery particles at the other end, and taken away by a hoist or a wind conveying system.
  • 2. After adding a certain number of blocks, plug the feeding port and the discharging port, and then start the ball mill for a certain period of time before stopping, and take out the powder.

Use of ball mill

When the rotation speed of a billiard mill and the quantity and ratio of the loaded steel balls are kept constant, the output of the ball mill and the degree of pulverization are mainly related to the size of the added block and the amount of feed per unit time. When the block is larger or in units There are more feeds in the area, and the milled powder is thicker. For the stone mill using wind power, the wind volume and wind pressure can be adjusted to control the output and the degree of crushing.
 

Two methods of operation of the ball mill

There are two methods of operation of the ball mill: 1. Continuous production, that is, continuous feeding from one end, continuous discharge of the pulverized powder particles at the other end, and taken away by the hoist or wind conveying system, 2. After adding a certain number of blocks , plug the feeding port and the discharge port, and then start the ball mill for a certain period of time before stopping, and take out the powder.

Application of hanging type mill

The suspension roller mill is suitable for medium-hardness materials and can pulverize the material to a particle size of 0.044 mm or less. This is a milling machine that pulverizes the material by the extrusion and grinding action generated by the centrifugal force of the grinding roller.

Graphite Electrode For DC Furnaces

Electric steel industry in China will be the development trend of graphite electrode production of carbon products industry brings profound influence, look from breed, electric furnace steel mills will gradually reduce the demand for Regular power graphite electrode, high power and ultra high power graphite electrode, demand would increase from the specifications, the medium and small specification requirements (400 mm diameter and the following) shrinking, large size (diameter 450 mm and below) will rise year by year

Definition of screening

The use of screen faces with uniform openings to divide particles having a wide range of sizes after pulverization into several particle-level operations having a narrow range of sizes is referred to as sieving.
 

Definition of sieved product

A layer of sieve surface divides the mixed particles into two sizes of particles (such as 4~2mm, 2~1mm), and the finer particles are separated through the sieve hole, which is called the undersize product, and the larger than the mesh size is left in the sieve. On the surface, it is called the product on the sieve.

Standard sieve definition

The standard sieve is a set of sieves whose mesh size has been standardized, and the sieve consists of a sieve frame and a sieve surface.
 

Use of standard sieve

In use, the sieve holes are superimposed in a small order, and a certain number of samples are weighed and placed on the uppermost sieve. Then, a set of sieves are fixed on the sieve machine for several minutes, and the sieve sieves are poured out. The particles are surfaced and weighed correctly.

Parameter of RP graphite electrode

Item Unit RP
300-800mm
Electric resistivity Electrode μΩm 7.8-8.8
Nipple 5.0-6.5
Flexural strength Electrode Mpa 7.0-12.0
Nipple 15.0-20.0
Elastic modulus Electrode Gpa 7.1-9.3
Nipple 12.0-14.0
Bulk density Electrode ≥g/cm3 1.53-1.56
Nipple 1.70-1.74
CTE(100-600℃) Electrode x10-6/℃ 2.2-2.6
Nipple 2.0-2.5
Ash   0.5

Standard sieve specifications are mainly divided into two systems

1. One type is called Taylor's standard sieve. The Taylor standard sieve is sieved with the number of sieve holes per inch (25.4 mm). The number of sieve holes is referred to as the mesh. 2. Another category is called international standard sieve.
 
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