Generally speaking the measures that may be considered in order to reduce the risk of a flash fire/explosion during the charging of powders from bags into a dump station include:
• Ensure that all the metal sections of the bag dump station are electrically bonded together and grounded
• If the Minimum Ignition Energy of the dust cloud is less than 30 mJ, ensure that the operator(s) are grounded (resistance to ground less than 100 M ohm)
• Ensure that the dust exhaust system is preventing the spread of the dust cloud into the room
• Avoid vigorous dumping of powder from bags into the dump station
• Prevent the accumulation of any dust outside of the bag dump station by implementing an effective housekeeping procedure
• Seek expert advice (consider conducting an onsite dust explosion hazard assessment to identify and control all potential ignition sources and make provisions to protect people and the plant against the consequences of a flash fire or explosion)