A double-chamber double-bottom side-blowing furnace for zinc leaching slag treatment and its treatment method

Abstract

The invention discloses a zinc leaching slag processing double-chamber and double-bottom side blowing furnace and a processing method thereof. In the processing process, firstly, natural gas and oxygen-enriched air are introduced into the side blowing furnace through a gas spraying gun, then collected zinc leaching slag, reducing agents, slagging agents and matting agents are added into the side blowing furnace through a fuming chamber charging port and a depletion chamber charging port to be processed, the temperature in a fuming chamber is controlled to be 1000-1150 DEG C in the processing process, and the temperature in a depletion chamber is controlled to be 1150-1250 DEG C; and metal steam generated during processing enters a gas phase area to be oxidized by air entering via a secondary air port and then is discharged by a smoke vent on the top of the side blowing furnace, valuable metal is captured by matte and discharged along with the matte, and residual furnace slag is discharged by a slag inclined outlet. The process for processing the zinc leaching slag through the double-chamber and double-bottom side blowing furnace with the small floor space is easy to implement, thecontent of valuable metal in the produced slag is reduced, the recovery rate of the valuable metal is improved, and the part replacement pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and in particular relates to a double-chamber double-bottom side-blowing furnace for zinc leaching slag treatment and a treatment method thereof. [0002] technical background [0003] At present, the commonly used zinc leaching slag treatment process is the rotary kiln volatilization method, but the common rotary kiln volatilization method has the following defects: low equipment capacity, short furnace lining life, high comprehensive energy consumption, expensive coke is required, and the equipment occupies a large area , the operating environment is poor, and the recovery rate of other valuable metals such as Ag, In, Ge, etc. in the zinc leaching slag is low. [0004] Patent application documents CN102796875A, application documents CN102321806A, and CN103451445A each disclose a process using a side-blowing furnace to treat zinc leaching slag, but these processes all use a sing...

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Problems solved by technology

[0003] At present, the commonly used zinc leaching slag treatment process is the rotary kiln volatilization method, but the common rotary kiln volatilization method has the following defects: low equipment capacity, short furnace lining life, high comprehensive energy consumption, expensive coke is required, and the equipment occupies a large area , the operating environment is poor, and the recovery rate of other valuable metals such as Ag, In, Ge, etc. in the zinc leaching slag is low

[0004] Patent application documents CN102796875A, application documents CN102321806A, and CN103451445A each disclose a process using a side-blowing furnace to treat zinc leaching slag, but these processes all use a single-chamber, flat-bottomed single-structure side-blowing furnace, and all processes need to be realized. Multiple side-blowing furnaces are connected in series, and multiple different furnaces are used to process the molten hot slag in stages, which occupies a large area and is complicated to operate

[0005] The document with the application number CN201514113A discloses a double-chamber oxygen side-blowing furnace for non-ferrous metals, which has a high and low hearth, and a melting chamber and a blowing chamber above the high and low hearth, but only smelting is produced during the production process of this high and low cylinder. Two kinds of slag, blowing slag, produce two main products of crude copper or crude nickel, so that the processed materials cannot be fully processed and cannot be recycled efficiently

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