A comprehensive recovery method for complex arsenic-containing and valuable metal slag dust materials

A technology of valuable metals and recycling methods, applied in the direction of process efficiency improvement, cement production, etc., can solve the lack of systematic process research and other problems

Active Publication Date: 2011-12-21
LEIYANG YANXIN NON FERROUS METALS
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  • Claims
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Problems solved by technology

For these complex arsenic-containing and valuable metal slag dust materials, there is a lack of system

Method used

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  • A comprehensive recovery method for complex arsenic-containing and valuable metal slag dust materials
  • A comprehensive recovery method for complex arsenic-containing and valuable metal slag dust materials

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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 dust, 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 fed into 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

Disclosed is a comprehensive recovery method for a complex material containing arsenic and valuable metal slags, comprising passing the materials containing arsenic through a primary rotating kiln to volatilize the arsenic, and through a secondary rotating kiln to purify the arsenic, so that an arsenic product containing 99.5% As 2 O 3 is produced; reduction smelting slags from the primary and secondary rotating kilns in a blowing volatilization furnace, with the resultant highly arsenious dust being returned to the primary rotating kiln for treatment, and the slags being used as a raw material in a cement manufactory and a raw material for zinc after undergoing strongly reductive dearsenization and volatilization of zinc in a fuming furnace; the resultant alloy containing arsenic being subjected to basic oxidizing refinement, and the oxidized/refined alloy after dearsenizations containing Pb > 72%, Sb > 12%, As 2 O 3 <0.02%, being sold as a lead-antimony alloy; the basic slags from the refinement, containing As 2 O 3 10%-20%, being subjected to crushing, dissolution in base, and filtration, with the slags thereof being returned to a blowing volatilization furnace for treatment; precipitating tin from the basic solution containing tin and arsenic by blowing in CO 2 , with the filtered tin oxide being sold as a raw material for tin; adding Ca(OH) 2 into the basic filtrate containing arsenic to precipitate arsenic, returning the filtered slags of calcium arsenate to the primary rotating kiln for treatment, and evaporating the remaining basic solution to concentrate and recover the base.

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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IPC IPC(8): C22B7/00
CPCC04B5/00C22B7/04C04B7/14C22B19/20C22B30/04Y02P10/20Y02P40/10
Inventor 石仁章梁金凤
Owner LEIYANG YANXIN NON FERROUS METALS
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