How to accurately classify flammable and explosive spherical aluminum powder?

The powder is a hazard. It is an active metal in Category 4.3. It is flammable when exposed to moisture. The explosive limit is between 25-40%. The ignition temperature is 645°C. Dust can ignite when wet. It can form an explosive mixture when mixed with oxidants. Violent chemical reactions can occur when in contact with fluorine and chlorine. Acids and strong alkalis can create hydrogen. It can then combust and explode. Powder and air can also form explosive mixtures. When it reaches a certain concentration, it will explode when it encounters Mars.

Main applications of fine spherical aluminum powder

Micro-spherical aluminum powder is mainly used in high-grade metal pigments. It’s also used in composite materials. These materials include thermal spray composite metal powder and ceramic composite steel pipe. The powder is also used in the military for gunpowder and various ammunition fillers. It’s used in aerospace for solid rocket propellant. In the chemical industry, it’s used in catalysts and pesticides. In metallurgy, it’s used in aluminothermic metallurgy and as steelmaking deoxidizers. It’s used in shipbuilding for conductive coatings. It’s also used in refractory materials like steelmaking furnace magnesia carbon bricks. It’s used in new building materials as an air-entrained concrete gas-generating agent. It’s also used in anti-corrosion materials, fireworks, and firecrackers.

Microscopic spherical aluminum powder
Microscopic spherical aluminum powder

Introduction to explosion-proof airflow classifier

The classifier is a type of aluminum powder classifier. It is also called an inert gas shielded airflow classifier. It is based on the EPIC Powder high-precision classifier that uses ordinary air. By changing the air composition, and the inlet and outlet piping, the equipment’s efficiency is improved. The sealing process and other methods are made for materials that are flammable, explosive, and easily oxidized. They are specially designed and developed for those materials.

The entire system of this HTS series equipment uses nitrogen or carbon dioxide as the working medium. The set has all the equipment. It has an inert gas source and an oxygen tester. It also has an air inlet system and a closed feeding system. It has a large classifier and an induced draft fan. It also has a closed discharge valve, an anti-static dust collector, a gas supplement device, and a cooler. The fan’s outlet connects to the classifier’s air inlet to form a closed nitrogen system.

The inert gas protective gas flow classifier has the following performance advantages:

Air Classifier
Air Classifier
  1. Use full enclosures to isolate the air. This prevents chemical reactions of materials in contact with the air.
  2. Use a multi-point explosion-proof design. It lowers the risk and greatly ensures safe production.
  3. Detect the gas concentration through a special device. It will then automatically add inert gas and adjust the equipment’s pressure.
  4. Improve the cooling design. This will lower the internal temperature and make the equipment more stable.
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