Process Overview

[Virtual Presenter] Process Overview Outside safe location Filter bag dissipative FM Filter bag dissipative T FM RX Rework Explosion vent Silo Explosion vent Dryer I LS 15 cut off T Fire extinguish steam Vac system Pipe – Pmax. Manhole -closed Lock RV FU RV Metal detector Small bag Deareation system Air velocity Rubber seal nozzle Big bag Mill Bag C –conductive need grounding.

[Audio] Prevent : Dust Fire/Explosion – Inside process equipment (operating Eg: silo, dryer, mill) Limit amount of fuel Dryer high high level interlock Prevent ignition source Static electricity spark / electrical arc – proper grounding/earthing of equipment & vessel Mechanical contact of moving parts – proper maintenance and reporting of equipment failures Metal detector/divertor between dryer and mill Always present Dust confined in vessel Hatch must be kept always closed during operation Pressure can be safely released by explosion doors System designed to pneumatically transfer powder with negative pressure – in event of sealing failure, will not blow out and create a dangerous dust cloud in workplace Always present Prevent ignition source Static electricity spark / electrical arc – proper grounding/earthing of equipment & vessel Mechanical contact of moving parts – proper maintenance and reporting of equipment failures Metal detector/divertor between dryer and mill Dust confined in vessel Hatch must be kept always closed during operation Pressure can be safely released by explosion doors System designed to pneumatically transfer powder with negative pressure – in event of sealing failure, will not blow out and create a dangerous dust cloud in workplace.

[Audio] Respond : Dust Fire/Explosion – Inside process equipment (operating) [Eg: silo, dryer, mill] Stop feeding of fuel to fire Stop suction FM -> prevent feeding of more fuel to fire Stop discharge to dryer – manually or by interlock trigger RX discharge 15 Stop Rotary valve -> segregate into sub process and limits amount of fuel Reduce fresh air being feed to fire Stop FM -> prevent feeding of more oxygen to fire Automatic & manually activated steam valve to dryer to cutoff oxygen to fire Contained inside equipment Do not attempt to release burning or smoldering material from equipment into workplace Stop feeding of fuel to fire Stop suction FM -> prevent feeding of more fuel to fire Stop discharge to dryer – manually or by interlock trigger RX discharge 15 Stop Rotary valve -> segregate into sub process and limits amount of fuel Reduce fresh air being feed to fire Stop FM -> prevent feeding of more oxygen to fire Automatic & manually activated steam valve to dryer to cutoff oxygen to fire Contained inside equipment Do not attempt to release burning or smoldering material from equipment into workplace.

[Audio] Prevent : Dust Fire/Explosion– During rework Always present Prevent ignition source [enforcement] Static electricity spark / electrical arc – proper grounding/earthing of big bags & equipment Limit rate of discharge from big bags (fast particle movement – high accumulation of static charges) Strictly no discharging of fresh warm/hot powder into equipment (fresh powder – possess static charges) Ensure no incompatible work (such as hotwork) near rework area Always present Dust confined in vessel – Stop bag discharge, hatch of hopper must be closed before re start of dryer operation Prevent dispersion into workplace – FM must be turn on during when discharging bags into hopper Prevent ignition source [enforcement] Static electricity spark / electrical arc – proper grounding/earthing of big bags & equipment Limit rate of discharge from big bags (fast particle movement – high accumulation of static charges) Strictly no discharging of fresh warm/hot powder into equipment (fresh powder – possess static charges) Ensure no incompatible work (such as hotwork) near rework area Dust confined in vessel – Stop bag discharge, hatch of hopper must be closed before re start of dryer operation.

[Audio] Dust Fire/Explosion– Outside of process equipment (flash fire) Minimise dust accumulation in workplace – Daily housekeeping During annual shutdown thorough housekeeping to remove dust from difficult to reach areas (secondary dust explosion prevention) Prevent ignition source Static electricity spark / electrical arc – proper grounding/earthing of equipment & vessel Hot work near process openings (sparks into process or material out from process) [PTW, RA] Mechanical contact of moving parts – proper maintenance and reporting of equipment failures Always present Building is not confined Minimise dispersion – Immediately stop equipment – blow out of dust due to plugging or suction failure Use vacuum system to remove dust from workplace, do not use compress air to blow Keep operating vessel hatch closed – to prevent explosion in vessel leading to dispersion of dust inside building Prevent ignition source Static electricity spark / electrical arc – proper grounding/earthing of equipment & vessel Minimise dispersion – Immediately stop equipment – blow out of dust due to plugging or suction failure Use vacuum system to remove dust from workplace, do not use compress air to blow Keep operating vessel hatch closed – to prevent explosion in vessel leading to dispersion of dust inside building Minimise dispersion – Immediately stop equipment – blow out of dust due to plugging or suction failure Use vacuum system to remove dust from workplace, do not use compress air to blow Keep operating vessel hatch closed – to prevent explosion in vessel leading to dispersion of dust inside building Minimise dust accumulation in workplace – Daily housekeeping During annual shutdown thorough housekeeping to remove dust from difficult to reach areas (secondary dust explosion prevention) Hot work near process openings (sparks into process or material out from process) [PTW, RA] Mechanical contact of moving parts – proper maintenance and reporting of equipment failures.

[Audio] Dryer Level interlocks TC FM RX Steam purge 15 HH: P-L-C -> Alarm plus Close RX discharge valve plus steam purge line L : P-L-C -> Discharge allowed Dryer Lsh Lshh Lsl Tc H: P-L-C -> Alarm Operator intervention Steam Fire extinguishing steam 15.

[Audio] Dryer Temperature interlocks High Temp interlock Steam purge 15 Dryer Lsh Lshh Lsl Tc 70oC –> PLC : alarm, operator intervention 75oC –> P-L-C--: Alarm plus Close RX discharge valve plus steam purge line 100oC –> P-L-C--: Fire extinguish steam purge valve open.

[Audio] Dryer Temperature and level interlocks Steam purge 15 HH: P-L-C -> Alarm plus Close RX discharge valve plus steam purge line L : P-L-C -> Discharge allowed Dryer Lsh Lshh Lsl Tc H: P-L-C -> Alarm Operator intervention.

[Audio] Dryer Hatch Open Interlock CCR PLC “Allow Hatch” button Fan Stop Discharge Stop Hatch unlock – after 60sec Dryer Latch open Mixer Stop RV Stop.