Graphite electrode can be divided into ordinary power graphite electrode, high power graphite electrode and ultra-high power graphite electrode according to its quality index. Ultra high power electrodes is mainly the current load and ton steel consumption, today xiaobian to introduce the physical and chemical indicators, specifications and characteristics of ultra- high power graphite electrode.
The ultra high power electrodes must be produced by high-grade needle coke, and its graphitization heat treatment must be carried out in the inner graphitization furnace. The graphitization temperature is as high as 2800 ~ 3000°C, so the resistivity is lower, allowing greater current density, smaller linear expansion coefficient, and it has excellent thermal shock resistance.
The main raw material of graphite electrode production is petroleum coke, ordinary power graphite electrode can add a small amount of asphalt coke, petroleum coke and asphalt coke sulfur content can not exceed 0.5%. High power or ultra high power graphite electrode also need to add needle coke. The main raw material of anodized aluminum is petroleum coke, and the sulfur content is no more than 1.5% ~ 2%. Petroleum coke and bituminous coke should meet the relevant national quality standards.
Electric furnace smelting bai steel technology development (electric furnace of large-scale, unit electric power of zhi du capacity increase and the use of dc electric arc furnace) is for the dao of graphite electrode goods puts forward new requirements and performance, high power and ultra high power electrodes electric furnace steelmaking, melting furnace charge can shorten the time, improve production efficiency, lower power consumption and reduce the consumption of graphite electrode.
This series of graphite electrode must be produced by high-grade needle coke, and its graphitization heat treatment must be carried out in the inner series graphitization furnace. The graphitization temperature is as high as 2800 ~ 3000°C, so the resistivity is lower, allowing greater current density, smaller linear expansion coefficient, and it has excellent thermal shock resistance.
