what is difference between silicon manganese and ferro manganese?

Composition
Ferro manganese is mainly an iron alloy composed of metal manganese and iron. It has relatively active chemical properties. When added to molten steel, it can form oxide slag with ferrous oxide, which floats on the surface of molten steel and reduces the oxygen content in the steel. The affinity of manganese and sulfur is also greater than that of iron and sulfur. When added to molten steel, manganese sulfide can be formed and converted into slag to be discharged, thereby reducing the sulfur content in the steel, increasing the forgeability and rollability of the steel, and improving the steel. strength and wear resistance.

Silicon-manganese alloy is an alloy composed of manganese, silicon, iron and a small amount of carbon and other elements. Silicon-manganese alloys can be smelted by continuous operation in large, medium and small submerged arc furnaces. Silicon and manganese in silicon-manganese alloys have a strong affinity with oxygen. When silicon-manganese alloys are used in steelmaking, the resulting deoxidation products MnSiO3 and MnSiO4 melt at 1270°C and 1327°C respectively, with low melting point, large particles and easy to float. , good deoxidation effect and so on. Use
Ferro manganese is usually used as a deoxidizer, alloy additive or desulfurizer in the process of steel making, and it is the most used type of ferro alloy; ferro manganese is mainly used as an alloy agent for steel production and an intermediate material for deoxidizers. It is also one of the main raw materials for the production of medium and low carbon ferro manganese.

Under the same conditions, using manganese or silicon alone for deoxidation, the burning loss rate is 46% and 37%, respectively, while with silicon-manganese alloy deoxidation, the burning loss rate of the two is 29%. Therefore, it has been widely used in steelmaking, and its output growth rate is higher than the average growth rate of ferro alloys, and it has become an indispensable composite deoxidizer and alloy additive in the iron and steel industry.
Classification
According to the carbon content, ferro manganese is divided into low carbon ferro manganese, medium carbon ferro manganese and high carbon ferro manganese. The most used in casting is high carbon ferro manganese with a manganese content of more than 65, which has high deoxidation effect, high quality and relatively cheap price. , and even some steel mills will choose 65 high carbon ferro manganese

Silicon-manganese alloys with a carbon content of less than 1.9% are also semi-finished products used for the production of medium and low carbon ferro manganese and electro-silicothermal metal manganese. In ferro alloy production enterprises, the silicon-manganese alloy used in steelmaking is usually called commercial silicon-manganese alloy, the silicon-manganese alloy used in smelting low carbon iron is called self-use silicon-manganese alloy, and the silicon-manganese alloy used in metal smelting is called high silicon alloy. Silicon manganese alloy.

Storage method

Ferro manganese is in irregular block shape, according to the regulations, the weight of each block does not exceed 20 kg. It should not be stored for more than one year in a warehouse with high humidity, and it should not be stored for more than one and a half years in a drier area or warehouse. Rusty, blackened surface.

The warehouse for storing silicon-manganese alloy needs to choose a clean place with smooth drainage, and it needs to be far away from the factory area that produces harmful gas and dust. Manganese alloys need to be stacked separately to prevent confusion and corrosion.