Combined protection smelting furnace and smelting method

Abstract

The invention discloses a combined protection smelting furnace and a smelting method. The combined protection smelting furnace consists of a big furnace body, a small furnace body and a water gas system, wherein the big furnace body is heated by alternating current, water gas is injected into the big furnace body, ores are arranged in the big furnace body, and the small furnace body is communicated with the big furnace body; the water gas system is provided with a water gas generator, a purifier, a cooler and a pressure-increasing pump. The water gas of which the pressure is increased is led into a rectangular annular pipe and a plurality of vertical spraying pipes above the big furnace body, and is sprayed into the ores during smelting. Carbon oxide and hydrogen in the water gas reduce metal oxides in the ores into metal, so that the metal recovery rate is greatly improved; inert gases in the water gas protect the reduced metal against decomposition, so that residual metal in exhausted tail gas after smelting is none, and air is not polluted; metal content in waste residue is greatly reduced, and the requirement of environment friendliness on a building material is met; the small furnace body can increase the space and time for metal deposition of slag liquid, and the improvement of metal recovery rate is promoted; the smelting process is continuously and automatically performed, so that compared with the current method that smelting and emission are performed one furnace by one furnace by continuously increasing and reducing an alternating-current electrode, the smelting method has the advantages that about 15 percent of electric energy is saved and the efficiency is greatly improved, and the method can be used for smelting various metals, such as copper, from the ores.

Description

[0001] (1) Technical field: the combined protection smelting furnace and smelting method of the present invention relate to a smelting furnace for smelting metal from ore. It is a general purpose furnace (F27D). (two) background technology: [0002] Existing smelting furnaces and smelting methods, see Figure 9 , The smelting furnace consists of a furnace body 1n, a slag outlet 1.3n, a metal outlet 1.1n, an AC electrode 3n, an AC power distribution device 4n and an AC lifting device 5n. The smelting method has the following steps: ①The volume V of solid raw materials is thrown into the furnace body to reach 0.15-0.25 of the total volume, the lifting mechanism lowers the AC electrode 3n and inserts it into the solid raw material 6, the power is turned on, and the AC electrode is energized to heat the solid raw material until the temperature reaches The current reaches the normal value; ②Continue to add solid raw materials from top to bottom to the top of the furnace body 1n; th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the combined protective smelting furnace and smelting method proposed by the present invention is to further improve the metal recovery rate of existing smelting furnaces and smelting methods, reduce metals in slag and improve environmental pollution and other problems

Images