Fatality at a Zirconium-Titanium Facility

It is reported that two persons died in a facility that handles zirconium-Titanium. Read the information from the link here. The incident occurred during packing of titanium powder into bricks. Federal Investigators Seek Cause Of Fatal Hancock Co. Blast - News Story - WTOV Steubenville. CSB in a statement stated that it is deploying 4-member investigating team. Internet search shows some accidents/injuries during the handling of pyrophoric materials, in which some useful information can be found in these links. LINK1, LINK2. 

1. Zirconium, titanium, thorium and other metal fires have great potential to cause injuries and fatalities as the thermal radiation can initiate fires in the surrounding areas. They can easily ignite and explode when subjected to friction/impact. It is well known that explosions be devastating in confined spaces. 
2. In combination with insufficient water, the metal fires can grow bigger due to release of hydrogen and can also cause sputtering leading to flying of burning splinters all around (some times to a few hundred meters distance - source: internet search) and cause secondary fires.
3. The zirconium fires are intense and bright and can cause retinal damage when viewed with naked eye. The fire once initiated can reach great heights in no time depending upon the quantity of material involved and size, when turnings are involved. It is reported extensively in literature and NFPA that metal powder/dust can cause dust explosion and friction is sufficient to initiate this.
4. TEC powder in portable extinguishers is effective only for small fires and big fires can be extinguished only by application of large quantities of water from all directions by experienced fire fighters. Further, continuous watch for at least a day is required after extinguishing as it is likely that the material under the heap can keep burning for a long time.
5. As per the safety advice mentioned in MSDS/NFPA, and as it is with any chemical, lesser the inventory, the more safer it is. We can't sit assuming that everything is safe when we are only storing and not handling / processing, which proved very costly during the famous Bhopal accident.
6. Pyrophoric materials need very little energy to catch fire / explode and it is stated that the static charge accumulated on a person is sufficient to initiate fire of this dust/powder. For a safe work place, it is recommended to use antistatic apparel, provide earthing to discharge static charge on the equipment/containers, flameproof/explosion proof electrical fittings, maintain at least 60% humidity, etc in the work area.
7. The powder generated should be incinerated every shift / day (depending upon the quantity) under controlled conditions so that the material can be rendered safe and can be disposed off as landfill.