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Blast furnace taphole bricks clay

Taphole clay is always applied to asure periodical and stable tapping from the blast furnace and also to protect the inner surface of taphole bricks. To maintain stable tapping time and taphole depth even under severe operational conditions with high productivity coefficients (ton/m3/day) or high iron temperatures, Krosaki Harima Corporation develops, designs and recommends the optimal clay for the client's blast furnace operation based on thorough field evaluations.

Material Evaluation Using Company’s Large Test Equipment

Required characteristics for taphole clay

The general requirements of taphole clay are
*Easy to charge (appropriate plasticity)
*Easy to drill (appropriate sintering)
*Applicable to long-term tapping (sufficient durability)
*Lower consumption (less consumption kg/ iron ton)
When developing the clay satisfying the above characteristics, a large testing apparatus which simulates the client’s black furnace taphole is employed to examine and evaluate the materials.

Development of hybrid clay

In addition to conventional tar-bonded clay or resin-bonded clay, Krosaki Harima Corporation has developed a hybrid clay, which has various advantages, to jointly satisfy the requirements of environmental protection, plasticity, taphole depth, and others. The corporation has recently been obtaining favorable comments from various clients on this hybrid taphole clay.

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