Production process for isolating fluorine and chlorine by acid extraction during electrolytic zinc production

A production process, electrolytic zinc technology, applied in the direction of photographic process, photographic auxiliary process, process efficiency improvement, etc., can solve the problems of increased fluorine and chlorine concentration, high fluorine and chlorine raw materials cannot be effectively treated, etc., to reduce processing costs, Promoting the effective utilization of secondary resources and improving the metal recovery rate

Inactive Publication Date: 2010-11-17
BAIYIN XIANDA TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Generally speaking, although the above fluorine and chlorine removal methods can partially remove fluorine and chlorine, they will cause the accumulation of fluorine and chlorine in the system, resulting in an increase in the concentration of fluorine and chlorine in the electrolysis process, so that high-fluorine and chlorine raw materials cannot be effectively treated

Method used

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  • Production process for isolating fluorine and chlorine by acid extraction during electrolytic zinc production
  • Production process for isolating fluorine and chlorine by acid extraction during electrolytic zinc production
  • Production process for isolating fluorine and chlorine by acid extraction during electrolytic zinc production

Examples

Experimental program
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Effect test

Embodiment 1

[0033] For the leaching-purification-electrolysis process that has been adopted in the hydrometallurgy (see figure 1) enterprises only need to establish a corresponding extraction system near the original system according to the design plan, introduce the original new liquid pipeline into the liquid distribution tank of the water phase circulation system of the extraction system, and introduce the circulating electrolyte into the reverse extraction system according to the required flow rate of the reverse extraction The extraction system can be realized without any changes to the original system. For the new system, the system design can be carried out according to the traditional electrolytic zinc production process, and it can be realized by adding an extraction system between the purification process and the electrolysis process (see figure 2 ).

[0034] The specific steps are as follows: (see figure 2 , image 3 ).

[0035] 1. Using zinc calcined sand or zinc oxide o...

Embodiment 2

[0051] Repeat the same steps described in Example 1, but the process parameters are adjusted as follows: two (2-ethylhexyl) phosphoric acid (trade name P204) is carried out by volume ratio 10-19% and kerosene by volume ratio 81-89% Mix to form the organic phase for extraction; control the concentration of zinc ions in the water phase to 10-20g / l, adjust the pH value to 5; extraction conditions: the ratio of the organic phase to the water phase is 1 / 1, the mixing time is 5 minutes, and the temperature is controlled at 10°C-15°C, the pH value of the extraction raffinate is 5; stripping conditions: use the waste electrolyte with a sulfuric acid concentration of 160-180g / l and a zinc ion concentration of 45-55g / l for stripping, the organic phase and the waste electrolyte The stripping ratio is 4 / 1, and the stripping temperature is 10°C-20°C; saponification is carried out with 25% sodium hydroxide solution; stripping regeneration is carried out with 19-25% concentrated hydrochloric ...

Embodiment 3

[0053] Repeat the same steps described in Example 1, but the process parameters are adjusted as follows: two (2-ethylhexyl) phosphoric acid (trade name P204) is carried out by volume ratio 19-25% and kerosene by volume ratio 75-81% Mix to form the organic phase for extraction; control the concentration of zinc ions in the water phase to 20-30g / l, and adjust the pH value to 6; extraction conditions: the organic phase is 1 / 2 of the water phase, the mixing time is 7 minutes, and the temperature is controlled at 15°C-25°C, the pH value of the extraction raffinate is 5; stripping conditions: stripping with waste electrolyte with sulfuric acid concentration of 180-200g / l and zinc ion concentration of 55-70g / l, organic phase and waste electrolyte The stripping ratio is 5 / 1-7 / 1, and the stripping temperature is 20°C-30°C; saponification with 35% sodium hydroxide solution; stripping regeneration with 25-32% concentrated hydrochloric acid .

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Abstract

The invention relates to the technology of hydrometallurgy, in particular to a production process for isolating fluorine and chlorine by acid extraction during electrolytic zinc production. The method comprises the following steps of: establishing an extraction working procedure between a leaching and purifying working procedure and an electrolyzing working procedure; extracting a new liquid obtained after purification by using acidic extractant, wherein anions such as fluorinion, chloridion and the like from raw materials are remained in raffinate, enter aqueous phase cycling and cannot enter organic phases; and performing back extraction on load organic phases with waste electrolyte when the extracted organic phases become the load organic phases containing cations such as metal zinc ions and the like to make the zinc ions enter the electrolyte so as to enter the electrolyzing working procedure, wherein the anions such fluorinion, chloridion and the like cannot enter the electrolyzing working procedure in the process so as to fulfill the aim of isolating the fluorinion and the chloridion from the electrolyzing working procedure.

Description

technical field [0001] The invention relates to hydrometallurgy technology, in particular to the production process of using acidic extraction to isolate fluorine and chlorine in the production of electrolytic zinc. Background technique [0002] In the electrolytic zinc production process, the fluorine and chlorine in the electrolyte mainly come from the raw materials. When the fluorine concentration reaches 200 mg / l, the cathode plate will be seriously stuck to the plate and cannot be peeled off, and the cathode plate will be severely corroded, making electrolytic production Difficult to continue. When the chlorine concentration reaches more than 800 mg / l, the zinc grade rate of the output cathode will decrease, the anode plate and equipment will be corroded severely, and the production cost will increase. At the same time, chlorine gas will be released to seriously pollute the electrolysis operation space and endanger the health of operators. In the zinc smelting process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C25C1/16C22B19/00
CPCY02P10/20
Inventor 刘向东强娟茹
Owner BAIYIN XIANDA TECH SERVICE
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