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A kind of stepwise ultrasonic strengthening method for tannin complexation precipitation germanium

A technology of ultrasonic strengthening and germanium precipitation, applied in the fields of resources and environment, can solve the problems of high price of tannin, increase the amount of tannin, poor effect of germanium precipitation, etc., so as to accelerate complex precipitation and reduce the amount of tannin. , the effect of maintaining integrity

Active Publication Date: 2021-06-29
KUNMING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

In the whole process, because tannic acid will also react with other impurity elements, increasing the amount of tannic acid will result in poor germanium precipitation effect and insufficient purity; and tannic acid is relatively expensive (55,000 / ton), making single Ning Shen germanium process has become one of the limiting links of germanium extraction

Method used

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  • A kind of stepwise ultrasonic strengthening method for tannin complexation precipitation germanium
  • A kind of stepwise ultrasonic strengthening method for tannin complexation precipitation germanium
  • A kind of stepwise ultrasonic strengthening method for tannin complexation precipitation germanium

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Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of step ultrasonic strengthens the method for tannin complexation precipitation germanium (see figure 1 ),Specific steps are as follows:

[0022] (1) Add the masking agent (nitrilotriacetic acid) to the leaching solution containing germanium and zinc to make the impurity ions such as arsenic, iron, magnesium and nitrilotriacetic acid coordinate and complex, and the ultrasonic intensity A is 0.3 W / cm 2 Under the condition of reacting for 2min to obtain solution system A; wherein the content of zinc in the germanium-zinc leaching solution is 50g / L, the content of Ge is 20mg / L, the content of Fe is 5g / L, and the content of Pb is 0.1 g / L. Acetic acid) is added in an amount of 0.5g / L; the pH value of solution system A is 0.5;

[0023] (2) When the ultrasonic intensity B is 0.2W / cm 2 Under the condition of , add the seed crystal (germanium seed crystal) to the solution system A in step (1), and then slowly add tannic acid at a uniform speed within 10s t...

Embodiment 2

[0027] Embodiment 2: a kind of step ultrasonic strengthens the method for tannin complexation precipitation germanium (see figure 1 ),Specific steps are as follows:

[0028] (1) Add the masking agent (glycine) to the leach solution containing germanium and zinc to make the arsenic, iron, magnesium and other impurity ions coordinate and complex with glycine, and the ultrasonic intensity A is 0.35W / cm 2 The solution system A was obtained by reacting for 5 minutes under the conditions of the above conditions; the content of zinc in the germanium-zinc leaching solution was 100g / L, the content of Ge was 60mg / L, the content of Fe was 10g / L, and the content of Pb was 0.15 g / L. The masking agent (glycine) The addition amount of is 1.0g / L; The pH value of solution system A is 1.5;

[0029] (2) When the ultrasonic intensity B is 0.25W / cm 2 Under the condition of , add seed crystal (carbon seed crystal) to solution system A in step (1), then add tannin acid slowly at a uniform speed wi...

Embodiment 3

[0033] Embodiment 3: a kind of step ultrasonic strengthens the method for tannin complexation precipitation germanium (see figure 1 ),Specific steps are as follows:

[0034] (1) Add the masking agent (citric acid) to the leaching solution containing germanium and zinc to make the impurity ions such as arsenic, iron, magnesium and citric acid coordinate and complex, and the ultrasonic intensity A is 0.4W / cm 2 The solution system A was obtained by reacting for 10 minutes under the condition of the above conditions; wherein the zinc content in the germanium-containing zinc leaching solution was 200g / L, the Ge content was 100mg / L, the Fe content was 20g / L, and the Pb content was 0.2g / L, and the masking agent (citric acid ) is added in an amount of 2.0g / L; the pH value of solution system A is 3.0;

[0035] (2) When the ultrasonic intensity B is 0.3W / cm 2 Under the condition of , add seed crystal (silicon dioxide seed crystal) to the solution system A in step (1), and then slowly ...

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Abstract

The invention relates to a method for cascaded ultrasonically strengthening tannin complexing to deposit germanium, which belongs to the technical field of resources and environment. In the present invention, the masking agent is added to the leaching solution containing germanium and zinc, and the solution system A is obtained by reacting under the condition of ultrasonic intensity A for 2 to 10 minutes; wherein the ultrasonic intensity A is greater than 0.3 W / cm 2 ; Under the condition of ultrasonic intensity B, add seed crystals in solution system A, then slowly add tannic acid to obtain system B; wherein ultrasonic intensity B is x W / cm 2 And x is 0.2~0.3; under the condition of ultrasonic intensity C, system B undergoes ultrasonic germanium precipitation reaction for 10~20min; wherein ultrasonic intensity C is y W / cm 2 , y is 0.1~0.2 and y=x-z, z is 0.05~0.1. The invention reduces the reaction between tannin and impurity ions by adding a masking agent, and strengthens the germanium deposition of tannin by introducing crystal seeds and cascaded ultrasound. The consumption of tannic acid is low, the content of impurity elements is low, and the germanium deposition rate is high, which can significantly improve The existing tannin sinking germanium process.

Description

technical field [0001] The invention relates to a method for cascaded ultrasonically strengthening tannin complexing to deposit germanium, which belongs to the technical field of resources and environment. Background technique [0002] Germanium (Ge) is an important strategic resource for national defense aviation. The extraction resources of germanium are mainly lignite, germanium enrichment in various metal smelting processes, lead-zinc ore and recovery from other wastes. The commonly used treatment methods for extracting germanium are: germanium-rich fume→sulfuric acid leaching→leach solution→tannin sinking germanium→tannin germanium slag→washing and drying→oxidation roasting→chlorination distillation. In the whole process, because tannic acid will also react with other impurity elements, increasing the amount of tannic acid will result in poor germanium precipitation effect and insufficient purity; and tannic acid is relatively expensive (55,000 / ton), making single The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B41/00
CPCC22B7/006C22B41/00Y02P10/20
Inventor 张利波杨坤杨芳芳彭金辉狄浩凯
Owner KUNMING UNIV OF SCI & TECH
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