Treatment method for reducing and recycling jarosite slag

A treatment method, a technology of ferrite slag, which is applied in the field of hydrometallurgical comprehensive recovery, can solve problems such as difficult treatment, low utilization value of iron vanadium phase, stable structure and properties of zinc ferrite, etc., achieves mild conditions and broad industrial application prospects , Ease of industrial application

Active Publication Date: 2022-01-14
CENT SOUTH UNIV
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Problems solved by technology

[0004] Aiming at technical problems such as the low utilization value of the iron-vanadium phase in the existing jarosite slag, stable structure and properties of zinc ferrite, and difficulty in processing, the first purpose of the present invention is to provide a treatment method for the iron-vanadium phase Prepare high-purity ferrous oxalate, in addition, realize the mild conversion of zinc ferrite, reduce its processing difficulty, and realize its resource separation

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  • Treatment method for reducing and recycling jarosite slag
  • Treatment method for reducing and recycling jarosite slag
  • Treatment method for reducing and recycling jarosite slag

Examples

Experimental program
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Effect test

Embodiment 1

[0101] The method of reducing and increasing the value of the jarosite slag produced by zinc smelting in this embodiment is carried out according to the following steps:

[0102] (1) Add 3 g of the jarosite residue into the solvent water and stir evenly, the mass ratio of the solvent water to the jarosite residue is 15:1-30:1;

[0103] (2) Add the leaching agent oxalic acid into the jarosite residue-solvent system, the mass ratio of the extractant to the jarosite residue is 1:1, mix evenly, and carry out the water bath reaction at a stirring speed of 300rpm and 60°C, and the reaction time is 5h; the reaction process was sampled once per hour and carried out XRD measurement, the measurement results are shown in image 3 ; It shows that the iron-vanadium phase can be completely reacted in 2h.

[0104] (3) Centrifuge the reaction product obtained by reacting for 5 h in step (2). After centrifugation, leach residue and centrifugal supernatant can be obtained, and the leachate (ce...

Embodiment 2

[0106] Compared with Example 1, the only difference is that the reaction temperature of step (2) is 50°C. The reaction process was sampled once an hour and carried out XRD measurement, the measurement results are shown in Figure 7 . from Figure 7 It can be seen that the iron-vanadium phase can be completely reacted within 2 hours.

Embodiment 3

[0108] Compared with Example 1, the only difference is that the reaction temperature of step (2) is 40°C. The reaction process was sampled once an hour and carried out XRD measurement, the measurement results are shown in Figure 8 , It can be seen from the figure that the sodium ferrite phase disappears after 2h.

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Abstract

The invention belongs to the technical field of comprehensive recovery of solid wastes generated by hydrometallurgy, and particularly relates to a treatment method for jarosite slag. The method comprises the following steps of: treating a jarosite phase in the jarosite slag: putting the jarosite slag into an oxalic acid solution, stirring and reacting, and carrying out solid-liquid separation after the reaction to obtain a reaction solution and residual slag; and carrying out sunlight irradiation treatment on the reaction solution, and then carrying out solid-liquid separation to obtain ferrous oxalate. In addition, the method further comprises a step of treating zinc ferrite enriched in the residual slag: slurrying the residual slag, oxalic acid and a reducing agent, carrying out one-pot transformation treatment on the obtained slurry, and then carrying out solid-liquid separation to obtain transformation products of zinc oxalate and ferrous oxalate. According to the method provided by the invention, large-scale high-value utilization of the jarosite slag can be realized, and the effect is remarkable; the method has the advantages of short process flow, simplicity and convenience in operation, mild reaction conditions, high conversion efficiency, cleanness, low energy consumption and excellent industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy comprehensive recovery, and in particular relates to a method for reduction and resource utilization of ferrite slag. Background technique [0002] Hydrometallurgical zinc smelting is the smelting process chosen by most zinc smelting enterprises in my country, and regardless of the conventional method and hot acid iron removal method used in hydrometallurgy zinc smelting, a large amount of zinc-containing leaching slag is accompanied by the production process. However, since the iron in the calcine also enters the solution together with the zinc during hot acid leaching, the iron ions in the zinc solution need to be removed in order to ensure the quality of the zinc solution. At present, according to the different iron removal methods, it can be roughly divided into jarosite method, goethite method and hematite method. Wherein the main advantage of the jarosite method is: can obtain the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B19/20C01G9/02C01G21/02C01G49/08C07C51/41
CPCC22B7/04C22B7/006C22B19/26C01G49/08C01G9/02C01G21/02C07C51/412C01P2004/03C01P2002/72
Inventor 王云燕朱明飞张文超柴立元闵小波王庆伟林璋颜旭李彦雨何紫彤鲁兴武
Owner CENT SOUTH UNIV
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