Method and device for improving energy efficiency of molten iron storage and transportation

Abstract

The invention relates to a method for improving the storing and transporting energy efficiency of molten iron. A molten iron tank is provided with an insulating cover. A closed inner cavity can be defined by the insulating cover and the molten iron tank. The insulating cover is provided with a molten iron inlet. An insulating channel is formed to guide molten iron in a molten iron chute into the molten iron tank from the molten iron inlet. The invention further relates to a device for improving the storing and transporting energy efficiency of molten iron. The device comprises the insulating channel and the insulating cover covering the molten iron tank. The closed inner cavity is defined by the insulating cover and the molten iron tank. The insulating cover is provided with the molten iron inlet, and the insulating channel extends to the molten iron inlet from the outlet end of the molten iron chute. The molten iron discharging process proceeds under the sealing and insulating protection conditions to the greatest extent through the insulating channel and the insulating cover, and molten iron is prevented from being in direct contact with the surrounding environment in the molten iron discharging process and in the molten iron storing and transporting process. The loss of the effective heat in the molten iron to the surrounding environment is reduced, and the energy efficiency of the whole molten iron storing and transporting process is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method and a device for improving the energy efficiency of molten iron storage and transportation. Background technique [0002] In the iron and steel smelting process, the high-temperature molten iron smelted in the blast furnace needs to be transported to the converter for further smelting through the molten iron tank, so as to obtain molten steel with qualified composition and temperature. The analysis of the entire molten iron storage and transportation process from the blast furnace to the converter shows that the energy consumption in the molten iron storage and transportation process includes the temperature loss of the molten iron and the power consumption of the transport locomotive. Among them, the temperature loss in the process of tapping and molten iron transportation is the most important energy consumption. In general, the temperature loss of molte...

AI Technical Summary

Problems solved by technology

[0003] Under the existing technology, the molten iron smelted in the blast furnace flows directly into the molten iron tank through the tap hole, and after the molten iron in a batch of molten iron tanks is fully filled, it is transported to the steelmaking converter. Due to the lack of effective heat preservation measures for the molten iron during this process, Therefore, the energy loss is high and the energy efficiency is low

Its specific disadvantages are as follows: first, when the molten iron flows from the tap hole to the molten iron tank, the molten iron is completely exposed to the surrounding air. blast furnace volume), and the tapping time is usually longer (about 40 minutes for a 200-ton hot metal tank), so the energy loss in the molten iron flow process is relatively large when tapping; The heat preservation device makes the surface heat loss of the molten iron stored in the molten iron tank larger, especially under the agitation of the molten iron flow, the heat loss from the open top of the molten iron tank will be more; third, most of the existing molten iron tanks during transportation Insulation cover is not added, which will also cause a large loss of energy during the transportation of molten iron

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