How is electrode paste used in a mineral thermal electric furnace and how is its self baking process carried out?

The use of electrode paste in mineral thermal electric furnaces and its self baking process is a complex process involving multiple steps such as raw material preparation, electrode shell installation, electrode paste filling, baking, and continuous use. The following is a detailed explanation of this process:

Raw materials and preparation of electrode paste
Electrode paste is mainly made by mixing anthracite and coke as aggregates, as well as asphalt and tar as binders, at a certain temperature. These raw materials need to meet specific quality requirements, such as controlling the ash content, volatile matter, sulfur content, specific resistance, and thermal strength index of anthracite within a certain range to ensure the quality of electrode paste. Specifically, smokeless coal needs to be calcined at high temperatures to remove volatile components, while asphalt and tar need to have appropriate softening points and volatile content.

The use of electrode paste on mineral thermal electric furnaces
Electrode shell installation: Firstly, install a cylindrical electrode shell made of 1-2mm thick steel plate on the electric furnace as a container and support structure for the electrode paste.
Electrode paste filling: Regularly fill the prepared electrode paste into the electrode shell. When filling, attention should be paid to controlling the height of the electrode paste column to adapt to the consumption rate of the electrode, and maintaining a certain pressure on the electrode paste of the electrode firing belt to increase the density of the liquid electrode paste and thus improve the strength of the fired electrode.
Self baking process
The self baking process of electrode paste in a mineral thermal electric furnace is a continuous and complex process, which can be roughly divided into the following stages:

Softening and melting: As the temperature of the electric furnace increases, the electrode paste inside the electrode shell begins to soften and partially melt. During this stage, the binder coal tar pitch of the electrode paste begins to thermally decompose, releasing volatile components.
Pyrolysis of coal tar pitch and elimination of volatile matter: during continuous heating, coal tar pitch is further pyrolyzed and a large amount of volatile matter is eliminated. At the same time, the aggregate particles in the electrode paste begin to bond together under the action of the binder.
Sintering stage: Under higher temperature, the melted electrode paste gradually coking and sintering into a carbonaceous electrode with good conductivity and mechanical strength. During this stage, the density and strength of the electrode paste significantly increase, forming an electrode body that can stably conduct current.
Continuous use and maintenance
During the operation of the electric furnace, the lower end of the electrode will be continuously consumed, so the entire electrode cylinder needs to be continuously lowered, and a new cylinder should be timely connected to the upper part of the electrode cylinder to replenish the electrode paste. The amount of electrode paste added should be adapted to the consumption of the electrode to maintain the height stability of the electrode paste column. In addition, it is necessary to regularly check the baking condition of the electrode paste, timely apply or replace the paste layer to ensure the normal operation of the electrode and extend the service life of the electric furnace.

In summary, the use of electrode paste in mineral thermal electric furnaces and its self baking process is a complex process involving multiple links. Through reasonable selection of raw materials, installation of electrode shells, filling of electrode paste, and continuous use and maintenance measures, it can be ensured that the electrode paste works stably and performs well in the electric furnace.