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Comprehensive recovery method for complicated materials containing arsenic and valuable metal slag dust

A technology for valuable metals and recovery methods, which can be used in the improvement of process efficiency, cement production, etc., and can solve problems such as lack of systematic process research.

Active Publication Date: 2012-10-31
LEIYANG YANXIN NON FERROUS METALS
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  • Abstract
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Problems solved by technology

For these complex arsenic-containing and valuable metal slag dust materials, there is a lack of systematic process research and reports from two aspects of environmental protection and resource utilization

Method used

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  • Comprehensive recovery method for complicated materials containing arsenic and valuable metal slag dust

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with embodiment.

[0022] Such as figure 1 As shown, the comprehensive recovery method of complex arsenic-containing and valuable metal slag dust materials of the present invention comprises the following steps:

[0023] (1), one-time rotary kiln volatilization and enrichment of arsenic: 80 parts containing As 2 o 3 40%, Pb25%, Sb5%, Bi3% high arsenic soot, 15 parts containing As 2 o 3 30%, Pb20%, Sb8%, Bi2% blast volatilization furnace dust, and 5 parts of anthracite coal powder with a fixed carbon content of 80% are sent to the primary rotary kiln. 2 o 3 36.5%, the block degree is controlled below φ20mm, the effective size of the furnace of the primary rotary kiln is φ1.6m×28m, the slope control is 1:25, the speed control is 4 rpm; the temperature of the furnace head is 750°C±50°C , the furnace tail temperature is 600°C±50°C, and the output of primary rotary kiln smoke contains As 2 o 3 70%, ...

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Abstract

The invention relates to a comprehensive recovery method for complicated materials containing arsenic and valuable metal slag dust, which comprises the following steps of: treating various arsenic-containing materials into a primary rotary kiln to volatilize the arsenic, and treating the materials into a secondary rotary kiln for purifying the arsenic to produce arsenic products containing 99.5 percent of As2O3; carrying out reduction melting on primary and secondary rotary kiln slag through a blast volatilization furnace, returning produced high-arsenic smoke dust back into the primary rotary kiln for treatment, using furnace slag as cement plant raw materials and zinc raw materials for carrying out resource treatment after the forced reduction arsenic removal and zinc volatilization through a fuming furnace, carrying out alkaline oxidation refining treatment on produced arsenic containing alloy, recovering lead, antimony, bismuth, silver and the like in the arsenic removal alloy according to the conventional method, carrying out crushing alkali dissolution and filtering on refined alkali slag with 5 to 15 percent of As2O3 and about 5 to 15 percent of valuable metal content, returning slag back into the blast volatilization furnace to be treated, introducing CO2 into tin and arsenic containing solution for precipitating the arsenic, using filtered stannic oxide as high-tin raw materials to be sold, carrying out arsenic precipitating and filtering through adding Ca(OH)2 into arsenic containing filter liquor, returning calcium arsenate slag back into the primary rotary kilnfor treatment after the filtration, and evaporating and concentrating the rest alkali liquid for recovering the alkali. The whole technical process of the method provided by the invention is simple and smooth, economic benefits and environment benefits are very obvious.

Description

technical field [0001] The invention relates to a comprehensive recovery method for complex arsenic-containing and valuable metal slag dust materials. Background technique [0002] At present, domestic people are more concerned about the arsenic-containing alkali slag produced in the antimony smelting industry, and some comprehensive recovery methods have been proposed, for example: CN200410023055.0 discloses a "pollution-free arsenic-alkali slag treatment method"; CN200610048549.3 discloses a " A process for comprehensive recovery of valuable metals in oxychloride antimony slag”; CN101899574.A discloses a “method for comprehensive recovery of arsenic-alkali slag and sulfur dioxide flue gas in antimony pyrometallurgy”. However, in the non-ferrous smelting industry, there are other processes that produce arsenic-containing slag dust, for example: the sintering dust of brittle pyro-lead-antimony ore contains As 2 o 3 8-20%, Pb10-15%, Sb10-20%; As 2 o 3 As 2 o 3 8-15%, Pb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00
CPCC22B30/04C22B19/20C04B7/14C22B7/04C04B5/00Y02P10/20Y02P40/10
Inventor 石仁章梁金凤
Owner LEIYANG YANXIN NON FERROUS METALS
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