A method for cleaning and recovering iron in a zinc hydrometallurgy process
A technology for hydrometallurgical zinc smelting and iron recovery, applied in the directions of ferric sulfate, nanotechnology, etc., can solve the problems of affecting recovery and easy access to jarosite, etc.
Inactive Publication Date: 2021-04-16
SOUTHWEAT UNIV OF SCI & TECH
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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.
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[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 object of the present invention is to provide a method for cleaning and recycling iron in a zinc hydrometallurgy process, which is characterized in that in the iron-containing zinc sulfate solution, a complexing agent, a chelating agent, a jarosite crystal seed, ammonium carbonate and a green medium are added. The jarosite is precipitated with the agent, and the liquid-solid separation is performed to obtain a jarosite precipitation and a zinc sulfate solution, and the jarosite precipitation is rapidly fired to obtain nano-ferric sulfate. The invention can solve the problem that valuable metals enter into the jarosite slag, and obtain clean jarosite slag.
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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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