A dry powder fire extinguishing agent, and easy-flowing fine powders for fire fighting by a fire extinguishing efficiency with small amounts of inorganic additives and dried, pulverized, the fine powder mixed composition. It is a widely used in fire extinguishing agents, and mainly used in fire extinguishers. In addition to the special fire fighting metal dry chemical extinguishing agent, dry powder extinguishing agent is generally divided into Bc and ABC dry powder extinguishing agent into two categories. Dry powder extinguishing agent, mainly through the pressurized gas under the action of the powder spray mist contact with the flame, physics, chemistry occurs when mixed fire. Portable dry powder fire extinguishers, proper use is: 1, the use of portable dry powder fire extinguishers, portable fire extinguishers should be handles, rushed to the fire department. 2, point at a distance of about five meters of fire, lay down fire extinguishers. When used outdoors, the direction should prevail. 3, Before use, first fire extinguisher upside down a few times, so that loose powder barrel. 4, using built-in or stored pressure dry powder fire extinguishers, should the pin is pulled, one hand holding the nozzle in one hand firmly pressed BAR, ejected from the nozzle will dry. 5, dry powder fire extinguishers to fight the blaze dispersed liquid, should the flame side, aligned with the flame root injection by near and far, about fire, fast forward, until the flame extinguished. 6, when a container of flammable liquid fire fighting dry powder fire extinguishers, the roots should be aligned with the flame from the flame side, about bursts. When the flames were driven vessel shall promptly forward the remaining fire extinguished. Fire should be careful not to spray nozzle directly at the surface to prevent the impact of dry air flow so that the oil splatter, causing the spread of fire, resulting in fire fighting difficult. 7, when fighting with dry solids fire extinguishers, fire extinguisher nozzle should be aligned so that the combustion of the most violent place, about fire and powder extinguishing agent should try to make the wine evenly spray the surface of the burning material until the fire extinguished. 8, using a dry powder fire extinguisher should be noted that the process should always be kept upright, recumbent or may not be reversed, otherwise not dusting; taking care to prevent the resurgence of the dry powder fire extinguishers, dry powder fire extinguishers because of the cooling effect is minimal, in the presence of the ignition point Under the conditions of hot objects, easy to produce resurgence after the fire. Note: The dry powder extinguishers pointer range - green for normal, red indicates insufficient pressure, yellow means too much pressure, but the pressure over a little does not matter, do not exceed too much, to prevent overpressure explosion.