Lightweight refractory brick for temporary walls built during coke-oven overhauls
Coke-oven walls suffer damage in the course of operations. Cracking around the end flues starts after 5-8 years in use, and after 10-12 years the bricks between adjacent cracks begin to disintegrate and collapse. When the end-flue wall reaches a residual thickness of 40 to 50 mm, it must be rebuilt. There are two alternative procedures; in one case the coke oven is left empty and a temporary cross-wall is built, while in the other the coke oven is charged after building the wall. The suggestion was made at the Yasinovka coking plant that cross-walls could be built from lightweight brick; a thickness of three bricks would suffice from top to bottom of the coke oven and the work would be completed in 50 to 55 min, under less arduous conditions. The wall should be faced with a guniting mixture of fireclay mortar and ''asbozurit,'' with 1 percent by volume of added sodium silicate. The cross-walls now used at the Yasinovka plant are built in blocks cut from perlite ceramic slabs. Each block weighs only 2 kg and replaces five standard firebricks weighing 15 kg. Two brick layers can build a perlite-block wall in just 30 to 35 min. The refractoriness of the cross-walls is limited, and they only last long enough to repair one side of the coke oven.
- OSTI ID:
- 7079368
- Journal Information:
- Coke Chem., USSR (Engl. Transl.); (United States), Vol. 12; Other Information: Translated from Koks Khim.; No. 12, 47(1976)
- Country of Publication:
- United States
- Language:
- English
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