How to extend the use of intermediate frequency furnace lining? Here, take a look at it with the small edition of Hubei furnace lining material sales manufacturers!

1, the erosion of the furnace bottom position

In the normal use of the lining, the thickness of the lining and the thickness of the bottom of the furnace will slowly thin due to the circulation of hot metal erosion in the long-term use, and the intuitive situation is the increase of the furnace capacity, the general lining will be eroded 30-50% of the time will be re-knocked off, and then a new furnace building work.

From the analysis of the entire furnace lining, where the erosion is obvious, it is in the slope position of the furnace bottom and the furnace lining. Generally, after long-term use of the furnace, the thicker lining material on the slope has been eroded to almost the furnace lining and the furnace lining on an arc surface, and even a slight depression appears in the square of the soil combined with the furnace bottom material and the furnace lining material. With the increase of the furnace age, the depression in this position It is also getting deeper and closer to the electric furnace coil, and affecting the use of safety, it is necessary to re-build the furnace. In addition to the quartz sand density at the time of furnace construction, the cause of furnace lining depression is also related to the chemical erosion when the feed is melted in our use and the mechanical erosion during operation.

2. Integrity of furnace lining

The integrity of the lining refers to the iron infiltration and cracks that often occur in the lining. In the production, there will often be weekend rest furnace stop phenomenon, when the electric furnace empties to stop melting, the lining will slowly cool, because the sintered lining material is brittle material, so the sintering layer will inevitably crack under the action of thermal expansion and cold contraction, the crack is very harmful, will lead to the infiltration of iron liquid into the lining and the furnace leakage phenomenon.

From the aspect of protecting the lining, the finer and denser the crack is and the distribution is uniform, because only in this way can the crack be closed in the cold furnace to a limited extent, and the lining has a complete sintering layer. In order to minimize crack propagation, attention should be paid to: avoid the lining sticking slag, the influence of too high temperature on the lining, the cooling of the lining, and the surface inspection of the lining often.

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