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Method for improving indium grade of enriched indium slag

A technology for enriching indium slag, which is applied to the field of improving the indium content of enriched indium slag in the process of producing enriched indium slag, can solve the problems of low ability to reduce slag amount, reduce slag amount, increase labor intensity, etc., and achieve reduction The effect of production cost, improvement of processing capacity, and significant economic benefits

Inactive Publication Date: 2010-08-25
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem existing in the prior art is that the total amount of enriched indium slag processed and production capacity in the rare and precious indium recovery process is limited every day. The impact on production is relatively large, which can cause problems such as short extraction period of organic phase, high production cost, increased labor intensity, and restricted production capacity, so that the production process of rare and precious indium cannot exert high production capacity.
If this method is used to wash the enriched indium slag, the main disadvantage is that the volume of the system is enlarged, the system consumption and labor intensity are increased, and the soluble components in the enriched indium slag are small, and the ability to reduce the amount of slag is too small. Collecting indium slag cannot effectively achieve the effect of reducing the amount of slag

Method used

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  • Method for improving indium grade of enriched indium slag
  • Method for improving indium grade of enriched indium slag
  • Method for improving indium grade of enriched indium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the slurry tank, replace the indium-containing acid solution with zinc powder. After stirring evenly, its dry weight is 1 ton. Add zinc electrolytic waste solution to it. The acid content of the electrolyte is 140 grams per liter of acid. Stir the acid Wash for 10 minutes, use a pH tester or pH test paper to measure the pH value at the end of pickling to 4.5, and finally send it to a filter press for liquid-solid separation, and recover the filtered filtrate to the zinc smelting production leaching process, and send the filtered residue to To the rare and precious indium system, the final slag volume obtained is 0.914t. The indium in the enriched indium slag was analyzed by the atomic absorption instrument analysis method, and the zinc content was analyzed by the chemical analysis method. The pickling results are shown in Table 1.

[0028] Table 1

[0029]

[0030] Note: growth rate = (after pickling - before pickling) / before pickling

[0031] Reduce slag amou...

Embodiment 2

[0033]Experimental operation process is identical with embodiment 1, and the acid solution that adopts is zinc electrolytic waste solution, and concentration is 160 g / liter, and stirring pickling time is 20 minutes, and pickling terminal pH value is 4.5, and pickling result is shown in Table 2.

[0034] Table 2

[0035]

Embodiment 3

[0037] The experimental operation process is the same as in Example 1, the acid solution used is zinc electrolysis waste solution, the concentration is 175 grams per liter, the stirring pickling time is 40 minutes, the pH value of the pickling end point is 4.5, and the pickling results are shown in Table 3.

[0038] table 3

[0039]

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Abstract

The invention discloses a method for the indium grade of an enriched indium slag in the process of lead and zinc smelting by-product zinc oxide. The method comprises the following steps: continuously adding acidic liquid into ore pulp after indium-containing acidic solution is replaced by zinc powder and stirring; stirring the ore pulp to perform a reaction for a certain time to form the mixed ore pulp; transporting the mixed ore pulp to a solid-liquid separator to perform solid-liquid separation; and conveying the separated filter residue to a rare indium system for processing, and then recycling the indium and zinc of the separated filter liquid. The main metal such as zinc and the like is reduced and recycled through a new process of increasing and reducing the slag quantity of the enriched indium slag, so that the quantity of the enriched indium slag is reduced and the indium grade of the enriched indium slag is improved.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method for increasing the grade of indium contained in enriched indium slag during the process of producing enriched indium slag. Background technique [0002] Due to its unique and excellent physical and chemical properties, metal indium has become one of the most important supporting materials in the modern electronics industry. However, as one of the rare metals, no single deposit has been found so far. At present, 90% of indium in the world is recovered from by-products of lead-zinc smelting. During the boiling roasting process of zinc concentrate, 95% of the indium in the zinc concentrate is oxidized to form indium oxide, which enters the calcined sand and soot. Usually, three-stage leaching (ie, neutral leaching, low acid leaching, and high acid leaching) is used to add The zinc powder replacement process recycles indium in zinc oxide to obtain enriched indium sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00
CPCY02P10/20
Inventor 李向东虢振强彭小明周新海王捍东
Owner ZHUZHOU SMELTER GRP
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