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Zhengnai Industry co., LTD

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+86 19903830057zhengnaishiye@gmail.com

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The existence of temperature difference during roasting The temperature difference is not only expressed at the end of the calcination temperature rise, but also in the whole process of calcination. The faster the temperature rise rate, the

5 stages in the roasting process of graphite electrode 1. The coal pitch is in a molten state, and the green body begins to soften. 2. The volatile phase is discharged in a large amount, 3. Asphalt begins to undergo strong polycondensation

There are 2 reasons why the length is not up to standard. Reasons for the length of the substandard: 1. The length of the green body is incorrectly measured. 2. The control valve and the cutter operating mechanism are malfunctioning, so the

Green defect type Green defects are defects in the appearance of the green body or internal non-compliance with technical standards. The green defects are generally observed with the naked eye. If necessary, the surface of the green body is

Compression ratio definition in graphite electrode The compression ratio is the ratio of the cross-sectional area of the chamber of the extruder to the cross-sectional area of the extruded product during extrusion. Small tonnage extruder ca

Upper surface contact specific pressure selection The upper surface contact specific pressure also has an effect on increasing the green density and shortening the vibration time.When standing upright, the green contact pressure of the larg

Reasons for green cooling in graphite electrode The green body just leaving the extrusion nozzle maintains a high temperature, cuts to the required length, and is immersed in cold water to prevent the green body from being deformed. Vibrati

Assembly of the extruder in graphite electrode 1. The main residence plug and the main residence plug hydraulic cylinder, 2. The material chamber; 3. The extrusion nozzle that can be replaced as needed, 4. The secondary plunger and the seco

Factors that determine the fluidity of the paste The flow characteristics of the paste during extrusion depend on the type of paste, the temperature of the extrusion process, the shape of the nozzle and the surface finish, and the extrusion

Mechanical properties of carbon paste in graphite electrode The change in mechanical properties over time is called mechanical relaxation, including stress relaxation, creep and dynamic mechanical properties. Stress relaxation definition St

The proper temperature will make the paste look good. The heating temperature is not higher, the better, the heating temperature is too high, the composition of the coal tar pitch changes, the low molecular components in the coal tar pitch

3 methods of electric heating in graphite electrode Electric heating methods include resistance wire heating. Power frequency induction coil heating. Heating using electric heating elements. Advantages of electric heating kneader The electr

Countercurrent powerful kneading machine in graphite electrode Counter-current powerful kneading machine is a new type of kneading equipment. It is used as a dry material mixing equipment in casting, glass production and other industries. I

Plastic size determinant The size of the plastic exhibited by the paste as a whole during the extrusion process is mainly determined by the relative amount of free pitch between the gums and the extrusion temperature. Why choose our graphit

Definition of wetting Wetting refers to the process in which a liquid is in contact with a solid, a liquid-vapor phase interface, a solid-gas phase boundary, and a solid-liquid phase interface. When the liquid asphalt is in contact with the

The main role of kneading is 3 points. 1. Various sizes of aggregate and powder are uniformly mixed, this mixing is carried out before the binder is added (dry blending). 2. After adding the binder, kneading to form the binder film on all t

Advantages of electronic scales compared to mechanical lever scales Compared with the mechanical lever scale, the electronic scale has the advantages of simple mechanical structure, small maintenance workload, and can form a weighing operat

The batching operation is a weighing process The batching operation is mainly a weighing process, which requires accurate weighing, minimizes the fluctuation range, and maintains the stability of the actual ingredient results. Shipping of g

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