How To Make Ferromolybdenum Lump?

Ferromolybdenum is an iron alloy composed of molybdenum and iron, generally containing 50 to 60% molybdenum, and is used as an alloy additive in steelmaking. The main use of Ferromoly is as an additive for molybdenum in steelmaking. Adding molybdenum to steel can make the steel have a uniform fine-grained structure, improve the hardenability of the steel, and help eliminate temper brittleness.

In high-speed steel, molybdenum can replace part of tungsten. Molybdenum is combined with other alloying elements, and the Ferro Molybdene smelting method is widely used to produce stainless steel, heat-resistant steel, acid-resistant steel and tool steel, as well as alloys with special physical properties. In the ferromolybdenum smelting method, molybdenum is added to cast iron to increase its strength and wear resistance.

In the Femo60 smelting method, molybdenum and iron can be miscible in any proportion. In the range of 1453-1813K, the compound MoFe (containing Mo63.29%) is stable in solid state. Mo2Fe3 will crystallize below 1753K even if it is in the solid phase. When the molybdenum content is greater than 50%, the melting point of the alloy increases significantly. For example, the melting point of an alloy containing 60% molybdenum is 2073K, and ferromolybdenum with high molybdenum content cannot flow out of the furnace.

The raw material for fFerro Moly smelting is mainly molybdenite (MoS2). Before ferromolybdenum smelting, the 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 smelting generally adopts the outside-furnace method. The furnace is a cylinder placed on a sand base, lined with clay bricks, and uses ferrosilicon containing 75% silicon and a small amount of aluminum particles as the reducing agent. After the charge is added into the furnace barrel at one time, it is smelted by the upper ignition method.

Use initiator (saltpeter, aluminum chips or magnesium chips) on the material surface. After ignition, it will react violently, then calm, release slag, and remove the furnace barrel. The Femo Ferromolybdenum ingots are first cooled in the sand nest, and then sent to the cooling room to be flushed with water for cooling. Finally, the molybdenum Ferro ingots are crushed and finished. The metal recovery rate is 92 to 99%. In the steelmaking industry in recent years, molybdenum oxide briquettes have been widely used to replace ferromolybdenum.

ferro molybdenum smelting usually adopts metal thermal method. Femo is a legally inspected commodity.