Raw material of steelmaking industry

3 month ago

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Hebei Shitu New Materials Technology Co., LTD

4 month

Product details

Resistivity is a parameter for measuring the electrical conductivity of an electrode. It refers to the resistance of a conductor to the current when current passes through it. Numerically, it is equal to the resistance of a conductor with a length of 1m and a cross-sectional area of 1m ² at a certain temperature, and the consumption decreases during use.

Flexural strength is a parameter that characterizes the mechanical system performance of graphite structural materials, also known as bending strength. It refers to the ultimate ability of an object to resist danger at the moment it bends and breaks when an external force is perpendicular to the object's axis. The unit is MPa. High-strength electrodes and connectors are less likely to break during use in the network.

Elastic modulus is an important aspect of mechanical properties and an indicator for measuring the elastic deformation capacity of materials. It refers to the stress-strain ratio within the elastic deformation range. The greater the elastic modulus and the elastic deformation to generate the required stress, simply put, the greater the elastic modulus of brittle materials and the smaller the elastic modulus of flexible materials.

The coefficient of thermal expansion of graphite as an electrode is a very important thermal performance parameter. The lower the value, the stronger the thermal stability of the product in China and the higher the oxidation resistance. This is reflected in application as less breakage and lower consumption.

Ash content refers to other components in solid products other than carbon graphite. The ash content of graphite as an electrode is mainly directly affected by the ash content of the material used. The ash quality of petroleum coke needle coke is relatively low, so the ash content of graphite passing through the electrode generally does not exceed 0.5%. An ash content within 1% has no significant impact on steelmaking, but the impurity elements in the ash will reduce the anti-oxidation system function research of the working electrode, etc.

The main indicators of the quality and function of graphite electrodes include: bulk density db, resistivity ρ, flexural strength, elastic modulus E, coefficient of thermal expansion α and ash content A%. According to the differences in the national standards and manufacturing processes of these indicators and materials of graphite electrodes, they are classified into three types: general power graphite electrodes (RP), high-power graphite electrodes (HP), and ultra-high power graphite electrodes (UHP). The post-graphite electrode manufacturing plant has been able to develop and add two types of high-bulk density graphite electrodes (HD) and quasi-ultra-high density graphite electrodes (SHP) according to the functional requirements of different users.

Based on national standards, each company has its own enterprise standards, and customers will determine the sequence in which they formulate their own quality standards. Volumetric relative density is the ratio of the mass of a graphite electrode material sample to its volume, with the unit of g/cm ³. The greater the volumetric density, the denser the working electrode is, and it is positively correlated with strength and the function of the anti-oxidation system. Generally speaking, for electrodes of the same type, the greater the influence of volumetric density, the lower the resistivity.

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Hebei Shitu New Materials Technology Co., LTD

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4 month

Main Product: graphite electrode , graphite power, carbon electrode, graphite scrap, graphitized petroleum coke, calcined petroleum coke

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