In an explosives plant, a blast occurred while pyrotechnic waste was being roasted.

A technician inserted pieces of combustible wood chips into a furnace that was still turned on. Another employee used the occasion to discard into the furnace hearth a cardboard box containing two used filters from the production process for a TiPP pyrotechnic compound. The residue on the filter immediately caught on fire, creating an impressive flame. Not wearing any individual protective gear (on their heads), the two employees were slightly burned. A third person went into a state of shock. The furnace door was also damaged.

The furnace had not been designed to burn this type of compound; moreover, the objects introduced into the hearth most likely were not compatible with those that had previously been consumed in the same furnace. Lastly, the existing safety guidelines were not respected: the furnace must only be fed with fuel when shut off or via the outside and furthermore must never be opened while still operating.