Method and device for supplementing heat to electric furnace
A technology for supplementing heat and electric furnaces, applied in the direction of electric furnaces, furnaces, furnace types, etc., can solve problems such as increased power consumption, insufficient energy input, and long electric furnace smelting cycle
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Embodiment 1
[0037] This embodiment provides a method for supplementing heat in an electric furnace, such as figure 1 As shown, the methods include:
[0038] S110, after the steel tapping of the previous furnace of the current furnace is completed, 500-520 kg of coal lumps are added to the electric furnace by the high-level bunker feeding device;
[0039] In this step, when the current heat is smelted, after the previous heat of the current heat is tapped and before the current heat is energized, 6-8 kg of coal blocks are added per ton of steel, and the high-level silo is used for feeding The device adds 500-520kg coal blocks into the electric furnace.
[0040] S111, within 25 minutes after the electric furnace is powered on, add 70-75 tons of scrap steel into the electric furnace by using the horizontal feeding device, and then add 200-210 kg of coal blocks into the electric furnace by using the high-level bunker feeding device;
[0041] When the electric furnace starts to be energized,...
Embodiment 2
[0054] This embodiment also provides a system for supplementing heat from an electric furnace, such as figure 2 As shown, the system includes: a horizontal feeding device 21, a high-level silo feeding device 22, a carbon powder injection device 23 and an oxygen supply device 24; wherein,
[0055] When the current heat is smelted, after the previous heat of the current heat is tapped and before the current heat is energized, the high-level bunker feeding device 22 is used to add 6 to 8 kg of coal blocks per ton of steel to the Add 500-520kg coal blocks into the electric furnace.
[0056] When the electric furnace is energized, within 25 minutes after the energization starts, the horizontal feeding device 21 is used to add 70-75 tons of steel scrap into the electric furnace. Here, the horizontal feeding device can be understood as a belt conveyor connected to the feed port of the electric furnace and used to horizontally transport scrap steel into the electric furnace.
[0057]...
Embodiment 3
[0068] In practical application, when using the method provided in Embodiment 1 and the system provided in Embodiment 2 to carry out steelmaking in a 70-ton Constance electric furnace, the details are as follows:
[0069] During the four steelmaking processes, when the electric furnace is energized, use the horizontal feeding device to add the corresponding weight of scrap steel, use the high-level bin feeding device to add the corresponding weight of coal, and at the same time spray the corresponding weight of carbon powder into the electric furnace; coal The carbon content C of the block is 80%, the sulfur content S is 1.0%, and the calorific value is 30MJ / kg. The specific weight parameters are shown in Table 1.
[0070] Table 1
[0071]
[0072] That is to say, in the 1# heat, 70t of steel scrap is added, 880kg of coal is added, the amount of carbon powder injection is 1000kg, and the oxygen supply per ton of steel is 30Nm 3 ; In the 1# heat, 70t of steel scrap is adde...
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Abstract
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