An energy-saving method for high-quality anode plates in low-grade copper smelting

Abstract

The invention discloses an energy-saving method for smelting high-quality positive plates by using low-quality copper and belongs to the technical field of processing of copper. The existing device with a vertical furnace and the existing technology are incapable of smelting raw materials of the low-quality copper. The method is characterized by controlling a vertical furnace combustor to form circulation high-temperature combustion gas flow, controlling the temperature of the circulation high-temperature combustion gas flow and the temperature of tundish combustion gas and controlling the property of the combustion gas, flowing manners of smoke and dust and a flowing manner of copper smelted liquid of the vertical furnace, an oxidation furnace, a reducing furnace and the tundish to smelt the high-quality positive plates by using the raw materials of the low-quality copper in a continuous and energy-saving manner. By virtue of the method, the pressure of a process of electrolyzing the positive plates is alleviated, the cost of electrolyzing the positive plates is saved, the advantage of high efficiency of the vertical furnace is fully exerted, and the productivity of the high-quality positive plates smelted by the low-quality copper is improved.

Description

technical field [0001] The invention relates to the technical field of copper processing, and relates to an energy-saving method for smelting low-grade copper and high-quality anode plates. Background technique [0002] Over the past two decades, copper processing has grown at a double-digit rate in my country every year, and copper processing products have played an increasingly important role in my country's national economy and high-tech fields. However, the development of my country's copper processing industry is limited by the shortage of high-purity copper raw materials. Smelting qualified high-purity anode plates from a large amount of scrap copper has become the key to overcome the development bottleneck. The existing main equipment for smelting anode plates is a reverberatory furnace, but the temperature of the flue dust at the outlet of the reverberatory furnace is about 1200°C, and more than 40% of the energy used for smelting the anode plate in the reverberatory...

AI Technical Summary

Problems solved by technology

However, several years have passed, so far the combination of shaft furnace and reverberatory furnace in the copper processing material industry can only smelt electrolytic residual electrodes with a purity of 99.90% and above, and smelt them into anode plates, such as the invention patent "electrolytic residual electrode Fire Recycling New Technology", Publication No. CN101654792A, Publication Date: February 24, 2010; In the copper processing materials industry, the equipment combining shaft furnace and reverberatory furnace has not yet been able to smelt scrap copper, and the existing scrap copper is still only The reverberatory furnace with serious energy waste can be used in smelting

[0003] The reason why it is very difficult to develop an energy-saving smelting method suitable for waste miscellaneous copper raw materials is that this research and development requires a large amount of investment, and it will cost several million yuan to build a test equipment system with a shaft furnace plus a reverberatory furnace. It costs about 2 million yuan to test the raw materials of the furnace equipment system once