Ferro-molybdenum alloy smelting method: smelting molybdenum iron raw materials are mainly molybdenite (MoS2). Before smelting, molybdenum concentrate is usually oxidized and roasted in a multi-hearth furnace to obtain roasted molybdenum ore with a sulfur content of less than 0.07%. Ferromolybdenum[2] smelting is generally done by the extra-furnace method. The furnace is a cylinder placed on a sand base with a clay brick lining, using ferrosilicon containing 75% silicon and a small number of aluminum grains as the reducing agent. The charge is added to the cylinder at one time and then smelted by the upper ignition method.
On the surface of the material with the initiator (saltpeter, aluminum, or magnesium chips), the ignition is the intense reaction, and then calm, slag, and remove the barrel. The molybdenum and iron ingots are first cooled in the sand nest, then sent to the cooling room to flush water, and finally crushed and refined. The metal recovery rate is 92-99 percent. In the steelmaking industry in recent years, molybdenum oxide briquettes have been widely used instead of ferromolybdenum.
Ferro-molybdenum is usually smelted by the hot metal method. Ferro-molybdenum is a legally tested commodity.
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