Precautions for Dust Explosion in Dust Removal Filters in 3D Printing Technology
In 3D printing technology, metal powders (such as aluminum, magnesium, and titanium alloy powders) pose a risk of dust explosions during the operation of dust removal filters. This article discusses the relevant precautions and preventive measures.
1. Risk Identification and Source Control – Metal powders (such as aluminum alloy powder and titanium alloy powder) are flammable and can release hydrogen gas and generate heat when they come into contact with water, forming explosive mixtures. – During storage, transportation, and processing, it is essential to avoid the formation of dust clouds and contact with ignition sources such as static electricity and open flames. – Incident cases: The 2023 accident at Shanghai Hanbang Company (aluminum-magnesium dust ignited by water leading to hydrogen explosion); the 2025 accident at a company in Zhuhai High-tech Zone (titanium alloy dust falling off formed a dust cloud, and friction generated sparks that caused an explosion).
2. Operating Standards and Process Management – Before replacing the filter cartridge, it is necessary to let it sit (e.g., for one day) and avoid using water directly for dust cleaning; it is recommended to use inert gas protection or dispose of it by soaking in large amounts of water. – Operators must wear professional protective equipment such as anti-static gloves, fireproof clothing, and goggles; it is strictly prohibited to work in casual clothing or with ordinary masks.
3. Equipment and Environmental Safety – Equip with explosion-proof dust removal equipment, ensuring that dry dust removal systems implement explosion venting and suppression measures, and avoid using the same dust removal system for different types of dust. – In areas with dust explosion hazards, explosion-proof electrical equipment must be used, the ground should be made of conductive materials, and personnel gathering areas are strictly prohibited; the operating area should be well-ventilated.
4. Emergency Response and Training – When metal dust catches fire, it is strictly prohibited to use water or foam extinguishing agents; sand should be used to cover it or allow it to burn out in a safe area. – Companies should establish special systems for dust explosion prevention, regularly conduct training on operating procedures and emergency drills to ensure employees master risk identification and response skills.
5. Supervision and Standard Implementation – Strictly follow the “Safety Regulations for Dust Explosion Prevention in Industrial and Trade Enterprises” (Emergency Management Department Order No. 6, 2021), cooperate with regulatory authorities to identify and rectify hidden dangers, focusing on the handling of metal powders, equipment maintenance, and the implementation of protective measures. – The flammability of metal powders and their reaction to water in 3D printing are the main risk sources for dust explosions. – Operating standards, equipment safety, emergency response, and regulatory compliance are key aspects in preventing dust explosions. – Companies need to strengthen safety training and emergency drills to ensure employees master the correct operating procedures and emergency response methods.