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Technical Description of Silicon Manganese Ore Thermal Furnace:
1.1 Silicon manganese alloy grades and applications
Silicon manganese alloy is an alloy composed of silicon, manganese,
iron, a small amount of carbon, and other elements. It is a widely
used and high-yield iron alloy. Its consumption ranks second among
electric furnace ferroalloy products. Manganese and silicon in
manganese silicon alloys have a strong affinity for oxygen. When
manganese silicon alloys are used in steelmaking, the deoxidation
products MnSiO3 and MnSiO4 produced have melting points of 1270 ℃
and 1327 ℃, respectively. They have the advantages of low melting
point, large particle size, easy floating, and good deoxidation
effect.
1.2 Brief description of process flow
After sorting, qualified materials such as manganese ore and
manganese rich slag are stored in the raw material yard, which also
contains raw materials such as coke and electrode paste. Various
raw materials are mixed according to the formula requirements for
smelting alloys. The raw materials are lifted by the inclined
bridge trolley to the four level platform of the main plant, and
then sent to the hopper by the circular distribution trolley. They
flow into the furnace through the material pipe.
The furnace charge enters the semi enclosed mineral thermal
furnace, and the 35KV power supply is introduced into the furnace
through a transformer and three-phase electrodes. The electrodes
generate arc heat between them and the furnace charge, which is
transmitted to the furnace filled with the furnace charge. Through
the arc heat and resistance heat, the silica can be reduced to
silicon manganese alloy. During the entire smelting process, the
strength of the voltage and current on the electrodes is set
according to the smelting process parameters, and the values of the
voltage and current are also different at different times, that is,
the power input into the furnace is different. The electrodes are
always stably inserted into the furnace charge in the furnace, and
the gas uniformly escapes from the entire charge surface. The arc
is not exposed from beginning to end, and the mixed furnace
material is added to the furnace in small batches as the material
level decreases, keeping the material level in the furnace at a
certain height. The electrode is in a flat cone shape around it.
When the silicon manganese iron generated by reduction in the
furnace reaches a certain level, a burner or round steel is used to
open the furnace hole, release the iron and slag, remove the slag
in the alloy, and then cast into ingots in the ingot mold. Electric
furnaces are powered under the prescribed power supply system. The
average electric furnace produces iron every 2 hours, with four
furnaces produced every 8 hours per shift. Select water quenched
slag, and after the iron casting is completed, use a winch to pull
the molten iron ladle to the casting room for about 20 minutes. The
overhead crane will lift the molten iron ladle and cast it into the
ground ingot mold. After the alloy has cooled slightly, pry it up
and lift it into the iron container with a crane. After cooling,
store it in the warehouse.