Dust circulation process method for continuous copper smelting

Abstract

The invention provides a method for circularly treating soot generated in continual copper smelting. The method is characterized in that the soot discharged by an exhaust port of a copper smelting furnace is introduced to a waste heat boiler for recycling waste heat, and then enters an electroprecipitator for dust separation and purification; the soot collected by the waste heat boiler and the electroprecipitator is transferred to a bucket conveyer by an embedding material push conveyer, and is transferred to an intermediate bunker by the bucket conveyer, and is transferred to a disc granulating machine and returned to a smelting furnace of the copper smelting furnace.

Description

[0001] This application is a divisional application of the following original application: the application date of the original application is October 19, 2006, the application number is 200610113798.6, and the name of the invention is "a process and device for continuous copper smelting using an oxygen bottom blowing furnace" ". technical field [0002] The present invention relates to a non-ferrous metal smelting copper smelting method and its device, more specifically, to a continuous copper smelting process and its device using an oxygen bottom-blown furnace, especially a smoke and dust circulation treatment method in continuous copper smelting . Background technique [0003] As far as smelting is concerned, the pyrometallurgy of copper in my country has been used in industrial production: flash furnace smelting, Noranda smelting, Osmelt smelting, Aisa smelting, autothermal smelting, silver smelting and traditional blast furnace Melting, electric furnace melting, reverbe...

AI Technical Summary

Problems solved by technology

[0007] Although the above two continuous copper smelting processes have solved the environmental protection problems of blowing operations, they still have some shortcomings and need to be further improved:

[0008] The Mitsubishi method consists of four furnaces (smelting furnace, depleted electric furnace, blowing furnace, anode furnace) self-flowing configuration. The melting furnace of the first process needs to be arranged on a higher floor, and the construction cost is relatively high. In addition, the Mitsubishi method’s The slag is diluted by an electric furnace, and the copper content in the waste slag reaches 0.6-0.7%, which is much higher than the average grade of ore mined by most large-scale copper mines in my country, and the resources have not been fully utilized

[0009] The disadvantage of flash furnace continuous blowing is that the copper matte needs to be crushed first, then dried and ground before it can be blown. The process is complicated, and it is difficult to guarantee a 100% recovery rate in each process. mechanical loss

In addition, the liquid high-temperature copper matte is crushed, and its physical heat is almost completely lost. The process of water crushing and solid copper matte, drying and blowing requires an external heat source, and the use of heat energy is unreasonable.

Copper matte crushing requires a large amount of water to wash, plus drying and crushing, additional labor and power consumption, resulting in increased blowing costs, which may be an important reason why this process has not been widely promoted over the years

[0010] In addition, there is also the Noranda continuous blowing method, which is still in the stage of industrial testing.

Images