複合吹錬転炉用耐火物技術

19900312

抄録

Today's combined blowing converters have been lined almost with MgO-C bricks.
In this paper, wear mechanism of MgO-C bricks particularly for sidewall and tuyere bricks was researched, and then the refractory technologies such as designing of brick qualities, study of brick shapes for tuyeres and of brickwork structure were discussed.
As the result, a small amount addition of Al-Mg alloy to MgO-C bricks showed a great improvement on the oxidation resistance of the bricks.
And the investigation results also indicated that the size distribution with fine grains was quite effective for the densification of brick texture.
Giant vacuum press with super high pressure was introduced to manufacture big size tuyere bricks and bottom bricks.
On the brickwork structure for body and bottom lining, thermal stresses were calculated and the applicable lining method which could reduce them was studied.