Total-thermal-state copper matte continuous converting method

Abstract

The invention relates to a total-heat-state copper matte continuous converting method, and belongs to the technical field of metallurgical processes. According to the method, a novel smelting and converting metallurgical furnace configuration mode is adopted, configuration and operation are optimized, and a smelting furnace and a converting furnace are connected, so that the continuous smelting-converting process of continuously treating copper concentrate, continuously blowing air, continuously feeding hot copper matte into the furnace, continuously slagging, continuously discharging slag andcontinuously or discontinuously discharging blister copper is realized. According to the method, a clean, safe and environment-friendly process is achieved, the cost is reduced, potential safety hazards are reduced, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for continuous blowing of fully hot copper matte, which belongs to the technical field of metallurgy. Background technique [0002] At present, copper smelting enterprises at home and abroad are developing towards the continuous blowing process technology of clean production. As far as copper blowing is concerned, more than 90% of the world today use PS converters. This process is a discontinuous operation. Matte packages are transshipped in the workshop, SO 2 The flue gas escapes seriously at low altitude, and in addition to the feeding and blowing process, the flue gas is difficult to completely seal, and there are also different degrees of escape phenomena, which makes the operating environment of the PS converter blowing operation very poor. The low-altitude pollution of the converter is a worldwide technical bottleneck faced by the copper smelting industry, and copper smelting plants all over the world are trying...

AI Technical Summary

Problems solved by technology

At present, the continuous blowing copper smelting process applied at home and abroad includes the Mitsubishi method developed by Japan and the continuous blowing of the flash furnace. The continuous copper smelting is realized by connecting the three furnace chutes, but the copper content in the waste slag is too high (about 0.8%) The resource utilization rate is low; continuous flash blowing is the "solid matte oxygen blowing method" proposed by the American Kennecott company in the late 1970s to replace the P-S converter, and it was industrialized in 1995.

In August 2007, the second flash blowing furnace was put into operation in Yanggu Xiangguang Smelter, China, and it began to reach the design capacity in October 2008. However, the process cost is high, and the matte needs to be cooled and ball milled before entering the flash blowing furnace. , also consumes part of the energy, and the site environment is not very good. After cooling, the hot copper matte is broken and then melted again, and the utilization of reaction heat is unreasonable.

The patent "A Process and Device for Continuous Copper Smelting Using Oxygen Bottom-blown Furnace" (CN101165196) proposes a process and device for continuous copper smelting using oxygen bottom-blown furnace, but it needs to produce high-grade matte in the front stage, which requires Systematically changing the process of copper smelting enterprises requires a large investment

[0005] At present, the amount of hot copper matte in the bottom-blowing converting furnace at home and abroad cannot be accurately confirmed, and the three-phase melt (crude copper layer, copper layer, Copper matte layer, slag layer) stirring violently, resulting in the quality of blister copper in the blowing process cannot be guaranteed

In addition, full heat production will cause high furnace temperature

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