Standardly the furnaces are designed to operate with an air in the furnace chamber. The contractor points out that aggressive chemicals have a negative effect on lining, insulation and furnace equipment. These are the main substances:
- oxidising and corrosive compounds (eg acids such as HCl/HF and acid gases such as SO2/SO3;
- alkali metals (Na, Li, K), their salts, oxides and hydroxides;
- heavy and toxic metals and their compounds (e.g., Pb, Zn, Cu, Sb);
- phosphoric acid and phosphates;
- toxic and otherwise hazardous gases (eg Cl2, F, H2S).
If the customer is aware that the substances may be released from the batch or that such batch is processed in a targeted manner, the customer is obliged to inform the contractor of this fact already at the request stage. If the contractor is not aware of this fact within the framework of the request, he can not be held responsible for any damage to the furnace or the buyer's property, including security risks.