medium and low carbon ferromanganese

Medium and low carbon ferromanganese is one of the important raw materials for stainless steel, high manganese heat-resistant steel, alloy steel, structural steel, tool steel and electric welding rod. It is used in the production of low-carbon manganese-containing special steel and military steel.

There are three production methods for medium and low carbon ferromanganese, electric silicon thermal method, shaking bag method and oxygen blowing method.

medium-and-low-carbon-ferromanganese

 

The electro-silicon heating method is to add manganese ore, manganese-silicon alloy and lime into the electric furnace. Depending on the state of the charged charge, the electric furnace method is divided into cold charging method and hot charging method. The added charge is all cold charge and becomes the cold charging method. The manganese ore and lime are slightly preheated, and the manganese-silicon alloy is charged in a liquid state called hot charging. Manganese ore and lime are cold materials, while manganese-silicon alloy is charged in liquid state called manganese-silicon hot charging method.

Shaking bale method to produce medium and low carbon ferromanganese: add preheated manganese ore, lime and liquid silicon-manganese alloy into shake bale, then shake it, and use the sensible heat and reaction heat of the charge to melt the charge and carry out refining and desiliconization. Medium and low carbon ferromanganese. In the modified method, after the preheated charge and the liquid manganese silicon are added to the reaction at one time, part of the slag needs to be poured out in the middle, and the preheated manganese ore and lime should be added again, and the shaking should be continued. Sometimes it is necessary to repeat several times until the silicon content of the alloy is qualified. . The shaker bag is used to stir the solution during the reaction, and two ladles can be poured back and forth, or a ladle with a nozzle at the bottom can be used to achieve stirring by blowing gas instead of the shaker bag.

Oxygen blowing method: This method is to pour the liquid high carbon manganese alloy into the oxygen blowing converter for oxygen blowing to remove the carbon or silicon in it to obtain medium and low carbon ferromanganese. This method is carried out by the exothermic oxidation of elements such as carbon and silicon. The manganese silicon oxygen blowing method is to pour the liquid manganese silicon into the converter, and continuously add manganese ore and lime during the blowing process, and also pour out part of the slag during the blowing process and then add manganese ore and lime until the alloy contains qualified silicon. 

So far, the electro-silicon thermal method is still widely used at home and abroad. At present, there are different grades of medium and low carbon ferromanganese commonly used in China. There are two kinds of medium carbon ferromanganese, 75% manganese, 2.0% carbon and 78% manganese, 1.5% carbon, and two kinds of low carbon ferromanganese, 80% manganese, Carbon 0.4% and manganese 80%, carbon 0.7%, the particle size can be customized, the conventional is 10-70mm, Anyang Huatuo Metallurgy can supply various grade of medium carbon ferromanganese and low carbon ferromanganese, welcome to consult.