Choose your electrodes carefully
A clean weld, with the correct welding electrode, is important. In choosing an electrode, two factors must be considered: the type of electrode dictated by the choice of anchor steel quality, which depends on prevailing thermal and chemical atmosphere, and that dictated by the steel quality of the casing and kiln shell.
When choosing the welding electrode, you must also consider the chemical and thermal environment of the installation, as well as the steel quality of the shell.