Method for treating copper concentrate through improved side blowing molten pool melting furnace

Abstract

The invention provides a method for treating copper concentrate through an improved side blowing molten pool melting furnace. The method comprises the steps that the copper concentrate is put into the improved side blowing molten pool melting furnace, meanwhile, a fusing agent is added, multi-channel spraying guns arranged on the two sides of the molten pool melting furnace spray oxygen rich gas and fuel into a molten pool mixed area of the molten pool melting furnace with the flowing speed being 180 m/s to 280 m/s, and therefore materials in the molten pool melting furnace have the molten pool melting reaction and generate copper matte and melting slag, wherein, the molten pool mixed area contains copper matte and melting furnace slag at the same time; and the melting slag is discharged out of a slag outlet of the molten pool melting furnace, and the copper matte is discharged out of a metal discharging opening of the molten pool melting furnace. The copper concentrate melting method which is compact in process, small in fixed number of workers needed for a job, good in environment friendliness and low in production cost.

Description

technical field [0001] The invention relates to the field of non-ferrous metallurgy, in particular to a method for treating copper concentrates with an improved side-blown molten pool smelting furnace. Background technique [0002] In today's metal copper pyrometallurgical smelting process, molten pool smelting has been widely used due to its advantages such as strong raw material adaptability, high production efficiency, less smoke and dust emissions, and low residual copper in slag. Especially with the gradual reduction of the grade of copper ore entering the furnace, the abundance of associated ore, high impurity content, and the aggravation of the status quo of continuous depletion of copper ore raw materials, the advantages of molten pool smelting will be further highlighted. [0003] In recent years, the copper smelting technologies introduced and developed in my country include flash smelting, top blowing smelting, oxygen bottom blowing smelting and Vanyukov bath smel...

AI Technical Summary

Problems solved by technology

[0006] (1) The temperature of the melt is not easy to maintain, and the matte and slag are often blocked due to insufficient temperature in the conveying channel, and then the staff needs to stop the furnace for cleaning, which affects normal production;

[0007] (2) Oxygen blown in from the tuyere and the melt are prone to local peroxidation during the reaction process, and overoxidation will lead to foamy slag. In severe cases, foamy slag will cause splashing and threaten safe production;

[0008] (3) The furnace body of the Vanyukov molten pool melting furnace is composed of copper water jackets. The flue gas or melt is easy to overflow from the gaps in the water jackets, so more SO2 escapes into the air and pollutes the atmospheric environment;

[0009] (4) When the Vanyukov molten pool smelting furnace is working, the melt hangs slag on the surface of the copper water jacket through the water cooling effect of the copper water jacket, thereby avoiding direct contact between the copper water jacket and the melt for a long time, but this hanging The slag is unstable. Once the copper water jacket breaks and water enters the melt, it will seriously endanger production safety and personal safety;

[0010] (5) When the Vanyukov molten pool smelting furnace processes copper sulfide concentrate, the amount of elemental sulfur in the flue gas is large, which is also very harmful to subsequent equipment corrosion

[0011] At present, although the newly developed molten pool melting furnaces similar to the Vanyukov molten pool melting furnace have improved the above-mentioned shortcomings to varying degrees, they have not been able to solve the problem well.

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