For the choice of the type of assembly, in addition to the technology of the product, the total time invested for assembly until the moment of readiness for production is of course also particularly important for the expected life. Not so much for new installations, but for coatings that become necessary again, generally only 2 to 3 weeks are available, in isolated cases 4 weeks during company holidays. The comparison of the types of assembly clearly shows that especially for the wet rammed lining, which is almost out of service, it is necessary to invest much more time for the assembly than for example for the dry lining, and also for the cast lining. If, for example, a team composed of 4 people (1 supervisor, 2 specialist bricklayers, 1 assistant) is assigned to all types of coating, the following net time requirement results:
* Wet tamped: approx. 26 days
* With masonry work : approx. 21 days
* Fade : approx. 15 days
* Dry: approx. 12 days
Channel induction furnaces for cast iron have repeatedly proven their effectiveness
for a long time to reheat, accumulate and melt.
The most frequent limitation of the life of the lining is due, according to experience, to the incrustation of slag in the inlet/outlet area, in the neck of the furnace, in the inductor channel to the drastically reduced useful load of the furnace. .
The change that has occurred in the refractory industry in recent decades can be clearly seen in the table of heating curves of a typical 30 Tn channel furnace. In the early 70’s it still took 3-4 weeks to heat a wet rammed channel kiln lining back then. In 1980 these times were reduced and only 10-12 days were needed for a cast coating. In the 90s a 40 Tn channel furnace. supplied dry you need approx. 4 days to warm up.