Prepare the solution to be mixed: ammonium metatungstate, potassium silicate, aluminum nitrate, potassium hydroxide and hydrochloric acid solution; liquid-liquid mixing the solution to be mixed according to the ratio; spray drying the mixed solution; reducing the spray-dried powder with hydrogen , Made into doped tungsten powder; pressing; vertical melting; rotary forging; drawing to make bulb tungsten wire. A thin wire made by forging and drawing a tungsten bar. Mainly used in electric light sources such as incandescent lamps and tungsten halogen lamps. The tungsten wire used as a variety of light-emitting bodies in the bulb also needs to be doped with a small amount of potassium, silicon and aluminum oxide during the smelting process. This tungsten wire is called doped tungsten wire , also called 218 tungsten wire. Or do not sag the tungsten wire. The current tungsten wire is generally drawn by various wire drawing dies. There are hard alloy wire drawing dies, precision ceramic wire drawing dies, etc. Diamond is only one of the wire drawing dies, and laser drilling is only a method of making molds, and diamond is not necessarily required. The wire drawing machine consists of a coarse wire drawing machine , a middle wire drawing machine , a fine wire drawing machine and a very fine wire drawing machine to form a complete wire drawing machine production line.
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