Hot loading process of molten iron in electric furnace and conveying vehicle for blast furnace molten iron
A new technology, molten iron technology, applied in the field of metallurgy, can solve problems such as large impact
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Embodiment 1
[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Embodiment 1: inject blast furnace molten iron into ladle 2, ladle 2 is made of high temperature resistant steel plate, made into a barrel shape, the wall of the ladle is lined with refractory material 3, ladle 2 has trunnions 4 on both sides. After the molten iron is loaded into the ladle, cover a layer of insulating agent on the surface of the molten iron, and then cover the ladle cover 1 to keep warm. The molten iron ladle is transported with the blast furnace molten iron transport vehicle 9, and the molten iron ladle fixed support 6 and the fixed flange 5 are arranged in the middle part of the blast furnace molten iron transport vehicle 9, and the molten iron ladle is positioned in the fixed flange 5 by the support guide plate. In order to prevent the molten iron ladle from wearing the bag in case, the molten iron damages the vehicle frame o...
Embodiment 2
[0021] Example 2: If the amount of molten iron added reaches 40%, the ultra-high-power electric furnace, the oxygen flow rate can reach 2500Nm 3 / h, the decarburization rate is 0.03-0.08% / min, and other process parameters and operating procedures are the same as in Example 1.
Embodiment 3
[0022] Example 3: If the smelting is medium-high carbon steel, in the later stage of smelting, when the temperature is > 1580°C, the power supply is stopped and the heat is supplied by chemical energy. Other processes are the same as in Example 1.
[0023] According to the above process, 100 furnaces were selected for each embodiment, and the average content of C in the electric furnace was detected to be 0.29%, which met the requirements of the steel type. The nitrogen content of the finished steel was within the normal range.
[0024] After adopting the new technology of molten iron hot charging steelmaking, if the amount of molten iron added is between 20% and 30%, the average power consumption per ton of steel can be reduced by 50KWh. The content of impurity elements such as nickel, chromium, and copper in the steel decreases significantly with the increase of the amount of molten iron added, which is conducive to the production of various high-quality steel products. .
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