STUDY ON A PERMANENT WALL TYPE FURNACE WITH COMPULSORY COOLING

Abstract

Attempts to find methods of protecting the refractory lining wall were made. The authors studied the formation of a permanent wall at the lining surface with compulsory cooling.
In this paper, the experimental results on erosion of lining bricks were reported. The results indicated that water cooling method would be applied to the elimination of lining erosion. Using this method, the permanent wall would be formed at the lining surface, and it would be neutral during melting operation. The authors tried to carry out the melting test by using the small of cupola in which water cooling method was applied to its melting zone.
The results obtained were summarized as follows;
1. By applying the water cooling method to protection of refractory lining wall, erosion loss was almost entirely eliminated and the quantity of repair materials and labour for maintenance was reduced.
2. Application of water cooling method to the melting zone of the cupola was very effective. It was recognized that it might obtain a permanent refractory layer at the wall surface and retain the constant diameter in the zone.
3. The melting zone unchanged gave a greater uniformity of furnace condition. This implied that prolonged melting could be operated.
4. Control of cooling water was easy and the life of the system would be unlimited.
5. A greater degree of control of slag composition being obtained, it was economically possible to charge steel scrap to a great extent and to produce high grade castings.