1 reverberatory furnace. Reverberatory furnaces are commonly used equipment for smelting non-ferrous metals, and their structure is similar to that used in aluminum alloys. The heat source of the reverberatory furnace is nothing more than solid fuel helium and A), fluid fuel helium, and gas and electric heat. Fluid fuels are often used in the smelting of magnesium alloys. At present, China's main gas is natural gas or natural gas.
The reverberatory furnace for smelting magnesium alloys is classified into a smelting furnace and a stationary furnace according to its use. The top of the reverberatory furnace is arc-shaped, and the heat is reflected from the top of the furnace and the wall of the furnace to the charge. Therefore, the heating of the charge is transmitted from top to bottom in a conductive and radiative manner, while allowing the flame and exhaust gas to slowly flow through the liquid surface. Keep the charge directly in contact with the heat flow. The reverberatory furnace burns faster and is suitable for large-scale production, but its thermal efficiency is low.
The bottom of the reverberatory furnace is generally made of masonite and magnesia. Recently, cast iron has been used as a hearth instead of a refractory material containing SiO: because SiO: easily reacts with MgC12 in the metal and flux, causing lining loss and increasing the Si content in the alloy.
7 site vortex furnace. In the smelting of magnesium alloys, Kodak vortex furnaces are also widely used. Because the burning of the site vortex furnace is much lower than that of the reverberatory furnace, the working environment is better than that of the reverberatory furnace. Citrus A zP can be divided into resistance site JA P and gas mandarin vortex furnace according to its heating method.
The structure of the resistor is shown in Figure 12-2. The resistive material is mounted on the wall of the furnace around the address vortex, and the resistive material is either filamentous or ribbon-like.
Gasoline vortex furnace fuel is mainly furnace gas. The gas is sprayed into the furnace through the nozzle and sprayed along the direction of the tangent to ensure proper combustion position. Otherwise, the nozzle is sprayed directly on the wall of the site A, which may cause local overheating of the metal and even burn the mango cord.
3 No core frequency induction furnace. In the melting of magnesium alloys, iron-free industrial frequency induction furnaces have begun to use. Induction furnaces for the smelting of magnesium alloys cannot be of the fused channel type, because the refractory flux and slag deposition bottom of the furnace make the fused channels blocked. The citrus vortex used in the induction furnace can be welded with a 10-25mm thick steel plate or can be directly cast into a thick walled site with a wall thickness of 4060mm. Because the cast citrus vortex is easy to produce defects and has a large volume, it is generally used to weld the citrus pods.
The coreless industrial frequency induction furnace is composed of a furnace frame, a furnace body, a sealed furnace cover, a ventilation system, a hydraulic system, a cooling system, an electromagnetic transmission, or a low-pressure injection system. The Citrus group consisting of multiple induction furnaces not only has high production capacity, but also because the charge and flame are not in direct contact with each other in the melting process, the amount of flux can be reduced, the working conditions can be improved, and the metal quality can be improved. With this smelting equipment, reliable purification measures are taken, and sealed injections are used during casting to obtain better quality ingots.
March 02, 2024
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