Method for extending service life of refining electric furnace lining 2

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Method for extending service life of refining electric furnace lining

The MgO content in the knotted material is 82%, and the SiO2 content is 4%. Since MgO is an alkaline oxide and SiO2 is an acidic oxide, the two can easily combine to form silicate at high temperature. In the process of forming silicate, a part of MgO can be consumed, which makes the lining damage more severe. If the content of MgO in the knotting material is increased and the content of Si02 is reduced, the probability of forming silicate will be reduced, which can guarantee the life of the lining at the source, so special magnesium ramming material needs to be selected to ensure Extend the service life of the furnace lining.

During the knotting process, the lining of the furnace is usually knotted layer by layer with dry ramming material. In order to tamping the knotting material, the height of each layer is not more than 200mm. Put a colored strip cloth on it, and then on the top of the colored strip cloth The circle on the bottom of the furnace is divided into multiple circles with different sizes from the outside to the inside according to the diameter of the vibrating rod. After the knotting is completed, the vibrating rod is knotted back and forth in a clockwise direction and counterclockwise along the arc. Many companies use one-way knotting or random knotting. In fact, this method of knotting is not effective. The clockwise and anticlockwise knotting method can be used to knot the holes of the knotted material to the minimum, and the knotted material layer is the most reliable; after the first layer is knotted, take out the colored cloth and then tie it Rake a "ten" groove with a depth of about 20mm and a width of about 10mm on the bottom of the furnace bottom, so as to facilitate the close combination between layers. In this way, the bottom of the furnace is not easily eroded during the production process, and its service life will naturally be extended.

The raw materials used for low- and medium-carbon ferromanganese are mainly manganese ore, manganese-silicon processing powder and lime. Among these raw materials, manganese ore has the greatest impact on the life of the lining. Generally, a humid ore that is generally humid will cause scorching and scorching However, this situation causes great damage to the lining, so it is necessary to keep the raw materials into the furnace dry, which can extend the life of the lining.

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