Gas smelting furnace and smelting method using gas

Abstract

The invention provides a gas smelting furnace and a smelting method using gas. The smelting furnace comprises a furnace body. At least two rows of gas and combustion-supporting gas nozzles which surround the side wall of the furnace body are arranged between a feed inlet and a feed outlet from top to bottom in the furnace body; one row of nozzles are arranged at the set height of the furnace body to smelt materials; in addition, at least one row of nozzles are arranged above and / or below the row of nozzles. The nozzles which are arranged above the row of nozzles perform preheating on the materials before melting and / or the nozzles which are arranged below the row of nozzles perform over-heating heating on the materials after smelting. A plurality of rows of nozzles are arranged at the smelting furnace body to heat the materials in the furnace and different heating temperature can be provided in the furnace body, so that iron and steel pieces can be rapidly smelted in the furnace body, the problem of oxidation is avoided, the flowability of the molten liquid is good and the furnace is beneficial to the pouring of cast steel and cast iron pieces.

Description

technical field [0001] The invention relates to the technical field of metal smelting, and in particular provides a gas-fired smelting furnace for cast iron and cast steel, and also provides a smelting method using gas. Background technique [0002] Most of the cast iron in the prior art is to add a certain amount of coke into the cupola first, which is commonly known as bottom coke in casting, and then add pig iron, scrap steel, recycled iron (scrap pig iron), and coke into the cupola according to the proportion after ignition. For smelting. This smelting method uses coke. During the smelting process, a large amount of smoke and dust are produced, and pollutants such as sulfides are also emitted, causing great pollution to the atmospheric environment. In the prior art of steel casting, electric furnaces are mostly used for smelting. The main disadvantages of using electric furnaces are high energy consumption and high production costs. [0003] Chinese patent discloses a...

AI Technical Summary

Problems solved by technology

There are deficiencies in the setting of such a gas feeder: the melting efficiency of a single-row energy feeder is low, and the melting material is slow

The temperature in the molten iron storage tank is low, so when the molten iron is put in for the first time, the molten iron hole may not be opened due to the low temperature of the molten iron.

[0006] During the discharge of molten iron in the smelting furnace, when the bottom cover of the furnace is opened after the furnace is turned on, a lot of unmelted metal will fall down and directly touch the pillars below the furnace body, often causing great damage to the pillars and even damaging the furnace. pillars melted away

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