Rotary-float smelting device and rotary-float smelting method

Abstract

The application discloses a rotary-float smelting device, which comprises a nozzle. The nozzle comprises a pulsation spray gun, a material channel which sleeves the outside of the pulsation spray gun, a first gas channel which sleeves the outside of the material channel, and a second gas channel which sleeves the outside of the first gas channel, wherein a diversion track of the first gas channel intersects the extending line of the axis of the material channel. According to the rotary-float smelting device, through the structures such as the pulsation spray gun, the first gas channel and the second gas channel, granular materials fully react with the reaction gas and an air curtain for protecting the inner wall of a smelting furnace is formed. Therefore, the smelting reaction can be fully carried out, and utilization rate of oxygen is enhanced. Meanwhile, the reaction gas with high oxygen-rich concentration also can be used. Sulfur dioxide content of flue gas is raised. The device also can meet the requirement of extensive fluctuation of feeding amount, and productivity is remarkably enhanced. The invention also provides a rotary-float smelting method which is applicable to the above rotary-float smelting device.

Description

technical field [0001] The invention relates to the technical field of metal sulfide smelting, in particular to a spin-float smelting device, and also relates to a spin-float smelting method for the spin-float smelting device. Background technique [0002] At present, metal sulfide concentrates are generally smelted by pyrometallurgy, that is, the process of using sulfur and iron in metal sulfide ores to react with oxygen and then being removed to finally obtain metals, especially copper, nickel and other metals. fire smelting. [0003] The pyrometallurgical process can be roughly divided into two categories: molten pool smelting and space smelting. The essence of space suspension smelting is to use the huge surface area of ​​dried powdery sulfide ore to make material particles (referring to powdery sulfide ore) Fully combined with oxygen, the oxidation reaction is completed in an instant (2-3 seconds). The main core process used in space suspension smelting is the direct ...

AI Technical Summary

Problems solved by technology

The main core process used in space suspension smelting is the direct current injection technology. During the smelting process, the joint action of the intermediate distribution wind and the vertical process wind is used to realize the contact reaction between gas and solid. However, due to the influence of the direct current characteristics in the above process, Low oxygen utilization rate, high smoke and dust rate, severe erosion and corrosion of furnace lining, unresponsive concentrate and accumulation of raw materials in the furnace and other vicious conditions often occur during production.

[0004] In order to improve the above problems, swirling jet technology has been developed in recent years, even if the reaction gas is spirally flowed to realize the contact reaction with the material particles, but the working effect is still not ideal, for example, the gas-solid contact is not sufficient, the airflow Cause erosion and corrosion on the inner wall of the reaction tower, etc., and cannot better meet the development trend of high feeding volume, high load, high oxygen concentration and high operating rate (referred to as "four highs") of smelting technology

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