The choice of electrode paste to anthracite

Pubdate: 01-10 2022

①Because of its proper fluidity during the softening and firing process, it greatly reduces the flow of the electrode accidents.

②The special paste has good thermal conductivity, which is helpful for the sintering of the electrode.Anthracite is the main raw material of electrode paste. The performance of anthracite is related to the performance of electrode paste. Therefore, it is necessary to understand and explore the performance of anthracite to ensure the quality of electrode paste.

my country’s anthracite coal is mainly distributed in Shanxi, Ningxia, and Guizhou. The anthracite from Dawukou in Ningxia is the best quality anthracite. Anthracite is an indispensable raw material for the carbon industry. It is mainly used for semi-graphite cathode carbon blocks, electric furnace carbon blocks, blast furnace carbon blocks, carbon electrodes and various pastes. Researching and discussing the various properties of anthracite is very beneficial for improving the quality of carbon products.

We have been engaged in carbon work for many years. We have dealt with anthracite in the early 1980s until now. We have visited Ningxia coal mines many times to understand, inspect, take samples, and perform comparative analysis. We have accumulated a lot of data about anthracite, and at the same time there are more than 20 Years of use practice can further research and verify various data of anthracite. Data based on practical tests are convincing.

Anthracite has a low true specific gravity, low ash content, and high sulfur content; Shanxi Jincheng area anthracite has a high true specific gravity, high ash content, and low sulfur content. The difference in the properties of anthracite in different regions should be related to the geological age of the formation of anthracite. Since the raw coal in Ningxia is really larger than the raw coal in Yangquan, it can explain why the strength of anthracite in Ningxia is good, and why the anthracite in Ningxia has good oxidation resistance. There are some differences in the properties of anthracite after high temperature calcination. The sulfur content of calcined anthracite in Ningxia area has hardly increased, and the specific resistance is 17% lower than that of Jincheng calcined anthracite, which may be related to the ash composition of anthracite. Therefore, in the production process, if electrode paste and carbon electrode are produced, first consider using Dawu Calcined anthracite in the mouth area.

③Special paste has lower specific resistance, and its conductivity is slightly higher than standard paste at the same temperature.

④ The special paste has good corrosion resistance, and its consumption is about 27% lower than that of the standard paste.

These advantages of the special paste will definitely play a significant role in improving the working state of the electrode, reducing electrode accidents, and promoting the development of production.

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