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Method for cleaning recycled iron in wet-process zinc smelting technology

A technology for zinc hydrometallurgy and iron recovery, applied in the direction of ferric sulfate, nanotechnology, etc., can solve the problems of affecting recovery and easy access to jarosite, etc.

Inactive Publication Date: 2019-07-05
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zinc sulfate solution of zinc hydrometallurgy often contains a small amount of indium sulfate and silver sulfate. During the alum sinking process, these precious metals are easy to enter the jarosite, affecting its recovery.

Method used

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  • Method for cleaning recycled iron in wet-process zinc smelting technology

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Embodiment Construction

[0022] A method for cleaning and recovering iron in a zinc hydrometallurgy process of the present invention, comprising:

[0023] In the iron-containing zinc sulfate solution, add complexing agent, chelating agent, jarosite seed crystals, ammonium carbonate and green neutralizer to sink vitriol, liquid-solid separation to obtain jarosite precipitation and zinc sulfate solution, jarosite precipitation through fast Burn to get nano iron sulfate. The raw material formula of sinking alum is shown in Table 1.

[0024]

[0025] In Example 1-Example 12 of the present invention, the mass content of the valuable metal zinc in the jarosite slag is less than 0.5%, and the content of indium and silver is less than 5g / t.

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Abstract

The invention aims at providing a method for cleaning recycled iron in a wet-process zinc smelting technology. The method is characterized in that a complexing agent, a chelating agent, an ammonioiarosite crystal, ammonium carbonate and a green neutralizer are added in an iron-containing zinc sulfate solution for vanadium precipitating, liquid-solid separation is conducted to obtain an ammonioiarosite precipitate and a zinc sulfate solution, and the ammonioiarosite precipitate is quickly sintered to obtain nanometer ferric sulfate. By means of the method, the problem occurring when valuable metal enters iron vanadium slags can be solved, and clean iron vanadium slags can be obtained.

Description

technical field [0001] The invention relates to a method for cleaning and recovering iron in a zinc hydrometallurgy process, in particular to a jarosite iron removal method in a zinc hydrometallurgy solution. Background technique [0002] The zinc hydrometallurgy process mainly includes five main processes of zinc sulfide concentrate roasting, leaching, purification, electrolysis, and melting and casting. Among them, the leaching process is the core process of hydrometallurgy and a key process that affects the production capacity and recovery rate indicators of the hydrometallurgy process. For decades, a variety of processes have been maturely applied. The zinc roasting ore hot acid leaching method was developed in the late 1960s with the successful development of various iron removal methods. Since hot acid leaching can dissolve zinc ferrite, iron that enters the solution can be effectively separated from the solution by jarosite method, goethite method and hematite method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14B82Y40/00
CPCB82Y40/00C01G49/14
Inventor 谭宏斌马小玲侯小强
Owner SOUTHWEAT UNIV OF SCI & TECH
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