Comprehensive recycling technique of valuable elements in smelting soot

A technology of valuable elements and soot, which is applied in the field of comprehensive recovery process of smelting soot, to achieve the effect of simple process, high comprehensive recovery rate and low production cost

Inactive Publication Date: 2012-06-27
SHANDONG FANGYUAN NON FERROUS METAL TECH SERVICE
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Problems solved by technology

[0006] The above processes are mainly for the treatment of converter soot, but for the treatment of high-arsenic soot produced by smelting furnaces, especially bottom-blown furnaces, there is still a blank in China, so it is very necessary to invent a process that can comprehensively process soot of various components

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  • Comprehensive recycling technique of valuable elements in smelting soot

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Embodiment Construction

[0022] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] A comprehensive recovery process for valuable elements in smelting soot, using a recovery technology combining wet and fire methods, the specific steps are:

[0024] 1) After smelting soot is pulped with sulfuric acid, it is continuously leached once, and the leachate is divided into underflow I and supernatant I through a dense tank;

[0025] 2) The underflow I is continuously leached twice, and the leaching solution passes through the dense tank to form underflow II and supernatant II;

[0026] 3) The supernatant II is returned to a continuous leaching tank, and the underflow II is filtered to form lead, silver and bismuth slag;

[0027] 4) The lead-silver-bismuth slag is smelted to obtain crude lead, and the crude lead is melted and cast to remove copper and arsenic to form copper-arsenic slag and lead-bismuth alloy plate;

[0028] 5) The c...

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Abstract

The invention provides a comprehensive recycling technique of valuable elements in smelting soot, which comprises the steps of: adding sulfuric acid in the smelting soot to pulpify the same, leaching for twice, and filter pressing the smelting soot to form lead-silver-bismuth slag; smelting, casting, electrolyzing, refining and reducing and smelting the lead-silver-bismuth slag in a converter to obtain rough lead, copper matte, pure bismuth and silver-zinc slag; adding cupric hydroxide in the supernatant to deposit arsenic, depositing the copper in the copper arsenate slag with deposited arsenic to form copper-arsenic solution, concentrating, crystallizing, dissolving and separating the solution to obtain white arsenic and cupric sulfate solution; performing twice electrodeposition treatments on the copper-zinc-cadmium solution with deposited arsenic to respectively obtain electrolytic copper and black copper, sequentially adding zinc oxide and zinc powder to perform deacidification, high-temperature copper removal and low-temperature cadmium removal treatments to obtain sponge cadmium, smelting the sponge cadmium to obtain rough cadmium, concentrating and crystallizing the zinc sulfate solution to obtain heptahydrate zinc sulfate. The comprehensive recycling technique provided by the invention has the advantages of improving the recovery of multiple metals, having extensive treatment raw materials, low production cost and high economic benefit, and avoiding the secondary pollution of decentralized processing and secondary loss of valuable metals.

Description

Technical field [0001] The invention belongs to the field of nonferrous metallurgy, in particular to a comprehensive recovery process of smelting soot. Background technique [0002] Since the end of the 1950s, domestic copper smelters and some scientific research and design units have begun to conduct experimental research on the copper converter soot treatment process. After 50 years of hard work, many achievements have been made. But strictly speaking, there is no ideal process so far. The copper converter soot treatment process currently used in industrial production mainly includes: [0003] (1) Soot—blast furnace reduction smelting—lead-bismuth alloy electrolysis—bismuth fire refining; [0004] (2) Soot—leaching—extraction; [0005] (3) Soot - water immersion - leaching slag reduction smelting. [0006] The above processes are mainly for the treatment of converter soot, but for the treatment of high-arsenic soot produced by smelting furnaces, especially bottom-blown...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B15/00C22B13/00C22B19/30C22B17/00C22B11/00C22B30/06C22B30/04
CPCY02P10/20
Inventor 崔志祥曾维王智王海滨赵庆彬雒庆堂李德松
Owner SHANDONG FANGYUAN NON FERROUS METAL TECH SERVICE
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