Electric furnace sponge iron hot charging device and method thereof

Abstract

The invention discloses an electric furnace sponge iron hot charging device and a method thereof, pertaining to the technical field of sponge iron hot charging. The device comprises a transitional material tank, a distributor, a fixed slide pipe, a hot charging revolving slide pipe, nitrogen sealing devices, a nitrogen cooling system and a receiving slide pipe; the fixed slide pipe is arranged below the distributor, and the hot charging revolving slide pipe is arranged below the fixed slide pipe; a common slide pipe is arranged on the hot charging revolving slide pipe, and the common slide pipe and the hot charging revolving slide pipe are both fixed on a same revolving support and converged into one slide pipe at the ends of the two slide pipes, thus forming a blanking slide pipe similarto a three-way pipe; the receiving slide pipe is fixed on a furnace cover; a first nitrogen sealing device is arranged between the fixed slide pipe and the hot charging revolving slide pipe; and a second nitrogen sealing device is arranged between the hot charging revolving slide pipe and the fixed receiving slide pipe on the furnace cover. The electric furnace sponge iron hot charging device is suitable for producing sponge iron by adopting a gas-based shaft furnace process (MIDREX) or other methods so as to hot charge the electric furnace later; and the device does not need external force except the revolving mechanism, and realizes continuous charging by self-gravity of the materials.

Description

technical field [0001] The invention belongs to the technical field of sponge iron hot charging, and in particular provides an electric furnace sponge iron hot charging device and a method thereof. Background technique [0002] Sponge iron (DRI) is formed by the direct reduction of iron ore under solid conditions, and can be used as a pure raw material for smelting high-quality steel and special steel, so that it can replace scrap steel for electric furnace steelmaking. In recent years, due to the shortage of steel scrap resources and the mature application of sponge iron production technology, the output of sponge iron has been increasing at a rate of more than 10% per year. The process of using cold sponge iron as raw material for electric furnace steelmaking has been quite common abroad, but using The gas-based MIDREX shaft furnace method or other rotary kiln methods produce hot sponge iron at a temperature of about 600 °C, and then directly slide into the electric furnac...

AI Technical Summary

Problems solved by technology

In recent years, due to the shortage of steel scrap resources and the mature application of sponge iron production technology, the output of sponge iron has been increasing at a rate of more than 10% per year. The process of using cold sponge iron as raw material for electric furnace steelmaking has been quite common abroad. The gas-based MIDREX shaft furnace method or other rotary kiln methods produce hot sponge iron at about 600 °C, and then directly slide into the electric furnace under the action of its own weight through the slide tube feeding method for steelmaking, which has not yet been used internationally.

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