SAFETY PRECAUTIONSLocal instructions for safety at work must be strictly observed during the installation of the roll crusher units. Lifting and transport of parts must be performed using lifting lugs and noting marked points. Before detaching the lifting ropes make sure that the equipment is well fastened into its support. Damaging the paintwork should be avoided during handling.Sufficiently strong scaffolding must be used to avoid accidents by falling.Fire guarding shall be used to prevent fire during welding and flame cutting operations.Note: In addition to all local safety codes and requirements the following is provided to assist thesmelter to establishing the plant overall safety rules and procedures. However, it must be understood that it is the owner's responsibility to insure and enforce all required safety rules.Hazards with inspecting roll crushers under waste heat boilers and electrostatic precipitators.- The process equipment is normally operated under negative pressure, but it is possible that short time pressure peaks may occur causing leaks of hot, dusty and toxic process gas.- If inside inspection of crusher is required, the process shall be stopped and it shall be ensured that there is negative pressure inside the equipment.In case of equipment failures and during maintenance operations, dust spillages may occur. Smelter dusts are very hot, fine and irritating to the eyes. Personnel shall be aware that dust may appear inside the crusher and will flow out, when a dead knife is dismounted. Before dismounting of the dead knife, persons should be positioned safely away from the crusher with a clear escape route available. Also before opening of the dead knife, lower levels should be clear in the event hot dust will flow.- It is emphasized that the SO2-strength inside the furnace and the gas train is very high.- Process equipment, like waste heat boilers and electrostatic precipitators are designed to allow ventilation before maintenance access. Positive air flow to cool and control atmosphere shall be used.