The Best furnace electrode from China manufacturer is the conductive rod used in the electric arc steelmaking furnace. It needs to consume 2kg of the Best furnace electrode from China manufacturer for smelting each ton of steel. Although it accounts for little of the steelmaking cost, it is very important for steelmaking.

1、 What is the Best furnace electrode from China manufacturer

The Best furnace electrode from China manufacturer, also known as graphite electrode, is mainly composed of petroleum coke, coal tar pitch and needle coke. It is made through calcination, extrusion, impregnation, graphitization, machining and other processes, and is mainly used in metallurgical industries such as steelmaking, silicon refining, yellow phosphorus refining.

Graphite electrode is divided into ordinary power, high power graphite and ultra-high power furnace electrode according to the power (current passing under a certain voltage). They correspond to ordinary power electric arc furnace, high power electric arc furnace and ultra-high power electric arc furnace respectively. Therefore, the graphite electrode can only be used according to its physical and chemical indicators to match the requirements of the electric arc furnace.

2、The Best furnace electrode from China manufacturer production process

1. Raw materials of the Best furnace electrode from China manufacturer

60% of the production cost of furnace electrode comes from raw materials, mainly petroleum coke, with needle coke and coal tar pitch added.

Petroleum coke is a combustible solid obtained from coking of petroleum residue and petroleum asphalt. Petroleum coke is a kind of easily graphitized carbon, which is the main raw material for producing graphite products.

Needle coke is a kind of high-quality coke with fibrous texture, low coefficient of thermal expansion and easy graphitization. The anisotropy of needle coke's physical and mechanical properties is very obvious, and it has good electrical and thermal conductivity. When it is extruded, it is arranged according to the extrusion direction. Therefore, needle coke is the key raw material for manufacturing high power or ultra-high power furnace electrode.

2. Calcination of the Best furnace electrode from China manufacturer

During the calcination process, the moisture and volatile matter in the raw materials are removed, which improves the physical and chemical properties of the raw materials. After calcination, high-quality needle coke becomes the raw material for producing high-performance electrodes. Generally, the maximum calcination temperature is 1250 - 1350 ℃, and the equipment is tank calciner, rotary kiln and electric calciner.

3. The Best furnace electrode from China manufacturer extrusion

The mixed material is extruded by an extruder. By changing the nozzle on the extrusion cylinder, an electrode with a certain diameter and length can be formed. By extruding, volatile matter can be discharged, and reducing it to a suitable temperature (90-120 ℃), the bonding force can be increased, so that the lump size of the paste is uniform and conducive to forming for 20-30 minutes. The extruding equipment is horizontal hydraulic extruding machine and screw extruding machine, and the extruding is called green billet.

4. The Best furnace electrode from China manufacturer baking

The thermal stability, mechanical strength and electrical conductivity of the material can be greatly improved by roasting process. The coal tar pitch in the green briquette is coked during the roasting process, and about 10% of the volatile matter is discharged. At the same time, the volume shrinks by 2-3%, and the mass loss is 8-10%. The physical and chemical properties of the Best furnace electrode from China manufacturer are also improved, the bulk density is reduced from 1.70g/cm3 to 1.60g/cm3, and the resistivity is 10000 μ Ω. m drops to 40-50 μ Ω. m, the mechanical strength of the electrode is also improved.

5. The Best furnace electrode from China manufacturer impregnation

It refers to that the baked products are put into the pressure vessel, and the liquid impregnant asphalt is immersed into the electrode pores under certain pressure and temperature conditions. The purpose of impregnation is to reduce the porosity of the product, increase the bulk density and mechanical strength of the electrode, and improve the conductivity and thermal conductivity of the electrode.

6. Graphitization

The high temperature heat treatment process in which the electrode semi-finished products are heated to 2300-3000 ℃ in a high temperature electric furnace to convert amorphous disorderly layered carbon into three-dimensional ordered graphite crystalline structure.

7. Machining of the Best furnace electrode from China manufacturer

The purpose of the Best furnace electrode from China manufacturer machining is to rely on automatic or semi-automatic CNC machine cutting to achieve the required size, shape, accuracy, etc., and to make electrode bodies and joints that meet the use requirements.