baked graphite electrode
Quality index of baked graphite electrode
The main indicators of the quality and performance of the baked graphite electrode are: bulk density db, resistivity ρ, bending strength, elastic modulus E, thermal expansion coefficient α and ash content A%. According to the differences between these indicators and different national standards and manufacturing processes of the baked graphite electrode, it is divided into three types: ordinary power baked graphite electrode (RP), high power baked graphite electrode (HP), and ultra-high power baked graphite electrode (UHP). Kind. The post-baked graphite electrode manufacturer can add high-density baked graphite electrode (HD) and quasi-super-high baked graphite electrode (SHP) according to the functional requirements of different users.
On the basis of national standards, each company has its own corporate standards, and customers will make their own order of quality standards. The relative volume density is the ratio of the quality management of the baked graphite electrode material sample to its volume. The unit is g/cm3. The larger the volume density, the denser the working electrode is, which is positively related to the strength and the performance of the anti-oxidation system. Generally speaking, the company , The greater the influence of the volume density of the same type of electrode, the lower its resistivity.
Resistivity is a parameter for measuring the conductivity of an electrode. It refers to the resistance of the conductor to the current when the current passes through the conductor. The value is equal to the resistance of a conductor with a length of 1m and a cross-sectional area of 1m2 at a certain temperature, which reduces consumption during use.
The flexural strength is a parameter that characterizes the performance of the mechanical system of the graphite structure material. It is also called the flexural strength. It means that when the external force is perpendicular to the axis of the object, the object will bend to the instantaneous limit caused by the external force to resist the risk. Capacity, the unit is MPa. High-strength electrodes and joints are less likely to break during the use of the network.
The modulus of elasticity is an important aspect of mechanical properties. It is an index to measure the elastic deformation ability of a material and refers to the stress-strain ratio within the range of elastic deformation. The greater the modulus of elasticity, and the greater the stress required for elastic deformation to produce, it simply, the greater the modulus of elasticity of brittle materials, the smaller the modulus of elasticity of flexible materials.
The thermal expansion coefficient of graphite as an electrode is a very important thermal performance parameter. The lower the value, the stronger the thermal stability of Chinese products, the higher the oxidation resistance, and the performance can reflect the less breakage and consumption in use. The lower.
Ash refers to other components in solid products other than carbon graphite. As the ash content in the electrode, graphite is directly affected by the ash content of the raw materials used. The ash content of petroleum coke needle coke is low. Therefore, the ash content of graphite passing through the electrode is generally not more than 0.5%, and the ash content within 1% has no effect on steelmaking. Obviously, but the impurity elements in the ash will reduce the performance of the anti-oxidation system of the working electrode, etc. This article chooses: baked graphite electrode .