Views:0 Author:Site Editor Publish Time: 2021-06-09 Origin:Site
Ferrosilica furnace is a kind of industrial electric furnace which consumes a lot of power. Ferrosilicone furnace shell, furnace cover, furnace lining, short net, water cooling system, smoke exhaust system, dust removal system, electrode shell, electrode pressure and lifting system, loading and unloading system, controller, burning device, hydraulic system, transformer and various electrical equipment and other components, with refractory materials are also quite harsh.
Ferrosilicone furnace mainly produces ferrosilicone, ferromanganese, ferrochrome, tungsten, silicon manganese alloy, the production form is one after another feeding, intermittent iron slag, is a continuous operation of industrial electric furnace.
Ferrosilica furnace is high energy consumption furnace type, reduce energy consumption and increase output, so that the life of the furnace can be used for a long time. Only in this way can the production cost of the enterprise be reduced and the discharge of waste residue pollutants be reduced. The following introduction of ferrosilicate furnace different reaction temperature, with different materials of refractory use scheme for reference only.
New material preheating area: the top layer of about 500mm, the temperature at 500℃-1000℃ heat of the high temperature airflow, electrode conduction heat and surface charge combustion and charge distribution current resistance heat, this part of the temperature is different, with clay brick as the inner lining.
Preheating area: after the evaporation of water, the charge will gradually go down and carry out preliminary changes in the preheating area, silica crystal transformation, volume expansion, and then crack or burst. The temperature in this section is about 1300℃. Masonry with high aluminum bricks.
Sintering area: is the crucible shell, the temperature at 1500℃-1700℃, liquid silicon and iron drop into the molten pool, sintering charge, poor air permeability, should be broken blocks, restore gas ventilation, increase resistance, this area is high temperature, erosion. Masonry with half graphite carbon - carbonized silicon bricks.
Reduction area: a large number of intense material chemical reaction area, crucible area temperature at 1750℃-2000℃, the lower part of the arc cavity connected mainly for the decomposition of SiC, the generation of ferric silicon, liquid Si2O and C, Si reaction, etc. The high temperature area should be masonry with half graphite baked charcoal bricks.
Arc area: the bottom electrode cavity area, the temperature is above 2000 ℃, the temperature is the highest heat area is also the source of the furnace temperature distribution in the most, when electrode inserted into the shallow so high up, low temperature of the furnace bottom slag ruled out less, the formation of false furnace bottom, cause the taphole up, certain false bottom of protecting furnace has certain benefits. Generally speaking, the insertion depth of the electrode has a great relationship with the diameter of the electrode. The general insertion depth should be the extreme distance from the bottom of the furnace to be maintained at 400mm-500mm. This part of the temperature is higher, using half graphite baked charcoal brick masonry.
Permanent layer with phosphate concrete or clay brick. The furnace door can be cast with corundum castable or pre-laid with silicon carbide bricks.
In short, according to the size of ferrosilica furnace, temperature, erosion degree, choose appropriate, environmental protection, different materials of refractory bricks and castables as lining.