Copper strengthening molten pool smelting furnace and smelting method

Abstract

The invention discloses a copper strengthening molten pool smelting furnace and a smelting method. An upper body of the smelting furnace adopts a structure that a refractory material is embedded in a copper water jacket, a slag line cooler in the form of the copper water jacket is arranged at the weak part of the lower part of the furnace, an uptake flue is designed to be streamline, forced cooling devices are arranged at a flue gas inlet and the weak part, a secondary air port is formed in the upper part of a furnace body, and the design of a double-plow discharger and three feeding ports is adopted. According to the smelting method, high temperature, high oxygen concentration and high air supply strength are adopted, so that high bed energy rate, high copper matte grade and high iron-silicon ratio of slag are realized. The utilization efficiency of coal can be greatly improved, and the direct recovery rate is increased. According to the copper strengthening molten pool smelting furnace and the smelting method provided by the invention, heat loss can be reasonably controlled in the smelting process, the fuel adding amount is reduced, economic benefits are improved, and energy is saved.

Description

technical field [0001] The invention relates to an intensified molten pool smelting furnace for copper and a smelting method, belonging to the technical field of metallurgy. Background technique [0002] The pyrometallurgical process of copper includes roasting, smelting, blowing, refining and other processes, with chalcopyrite concentrate as the main raw material. Smelting is mainly matte-making smelting, the purpose is to oxidize part of the iron in copper concentrate or roasted ore, and remove it with gangue, flux and other slagging to produce copper matte with higher copper content. At present, the main methods of pyromelting are divided into: melting pool smelting, suspension smelting and other smelting methods. Traditional molten pool smelting has the following disadvantages: (1) The bed energy rate is relatively low, resulting in high energy consumption, sulfur is not utilized, most of it enters the slag, and a small amount enters the flue gas. Due to the low concent...

AI Technical Summary

Problems solved by technology

Traditional molten pool smelting has the following disadvantages: (1) The bed energy rate is relatively low, resulting in high energy consumption, sulfur is not utilized, most of it enters the slag, and a small amount enters the flue gas. Due to the low concentration of sulfur dioxide in the flue gas, the efficiency of acid production is poor; (2) It is difficult to smelt high-grade copper matte. Due to the large amount of iron tetroxide produced during high-grade smelting, the gas permeability of the slag is poor, which leads to process accidents, and the high-intensity smelting process releases a large amount of heat, produces a large amount of smoke and High-temperature slag will cause great damage to metallurgical equipment, so it is difficult to produce high-grade copper matte

However, in the production process, there are still shortcomings such as low production efficiency, bed energy rate, heat utilization rate, high smoke and dust occurrence rate, and high fuel ratio.

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