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Some Problems In The Carbonaceous Lining Of Traditional Ore Furnace
Dec 24, 2018

The life of the blast furnace lining directly affects the production efficiency of the kiln and the control of the product cost. It is also the direction that the iron alloy industry workers have been trying to explore. Extending the life of the lining of the ore furnace is inseparable from the continuous use of the lining and the correct operation and maintenance of the tap. It is necessary to adopt scientific and suitable lining masonry technology, select high-quality refractory materials, and qualified construction team and responsible management team to ensure construction quality.

The traditional carbon refractory ore furnace lining can be divided into two categories according to the accuracy of the furnace and the binder:

One type is a common carbon brick block which is grooved with a rough surface and a fine seam paste;

The other type is a groove made of water glass, graphite powder, coal tar, etc., and a smooth ordinary carbon brick.

The obvious difference between the two is that the brick joints are different in size, and the preparation work and construction efficiency are different, and the precision requirements of the masonry process are also different. For the lining life, when the construction process is strictly controlled, the latter is improved compared with the former. There is a chance that the carbon bricks will be “draw” and “float”, the latter being smaller than the former.

The furnace lining is gradually eroded. Generally, the carbonaceous material at the electrode bottom of the furnace is slowly consumed by the alloy carburizing and molten iron scouring, and three electrode bottoms are formed in the furnace, which is full of A pot of hot metal. The abnormal situation is that there are carbon brick fragments at the tap hole, or a whole piece of carbon brick hidden in the slag liquid layer of the concrete chamber. Common accidents in the late stage of the lining have been produced by the iron outlet and the bottom of the furnace bottom. The iron tap is burned through, usually by the flow of molten iron at the joint between the vertical carbon brick and the horizontal brick. The serious problem is that the furnace shell is burned through the molten iron below the chute and below the horizontal brick. Burning through the bottom of the furnace is undoubtedly caused by the exhaustion of the refractory material at the bottom of the furnace, which is related to the length of the working end of the electrode and the expiration of the life of the lining.


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