Method for enriching germanium from wet process zinc smelting system
A hydrometallurgical zinc smelting and enrichment technology, applied in the direction of improving process efficiency, can solve the problems of difficult solid-liquid separation of ferric hydroxide colloid, low grade of neutralized slag and germanium, affecting zinc electrolysis efficiency, etc., and achieves high replacement rate. , Process condition control, low cost effect
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Embodiment 1
[0021] see figure 1 , add neutralizer zinc oxide calcine to the high-acid germanium extraction liquid (containing germanium 24mg / L) to adjust the pH to 4.5, control the heating temperature at 100°C, then add iron powder to reduce ferric ions, and control the temperature at 90°C After 20 minutes of reaction, a second batch of excess iron powder was added, the temperature was controlled at 95° C., the reaction time was 120 minutes, and the replacement rate of germanium could reach 96.2%. After liquid-solid separation, the replaced liquid needs to sink alum again to remove iron, and the replacement slag is washed with dilute sulfuric acid and used to extract germanium.
Embodiment 2
[0023] see figure 1 , add neutralizer zinc oxide calcine to the high-acid germanium extraction liquid (containing germanium 24mg / L) to adjust the pH to 1.0, control the heating temperature at 90°C, then add iron filings to reduce ferric ions, and control the temperature at 85°C After 20 minutes of reaction, a second batch of excess iron filings was added, the temperature was controlled at 95°C, the reaction time was 120 minutes, and the replacement rate of germanium could reach 93.8%. After liquid-solid separation, the replaced liquid needs to sink alum again to remove iron, and the replacement slag is washed with dilute sulfuric acid and used to extract germanium.
Embodiment 3
[0025] see figure 2 , add iron filings to reduce ferric ions to the liquid after iron removal (containing germanium 22mg / L), control the temperature at 95 ° C, after 20 minutes of reaction, add the second batch of excess iron filings, control the temperature at 85-95 ℃, the reaction time is 120min, and the replacement rate of germanium can reach 93.2%. After liquid-solid separation, the replaced liquid needs to sink alum again to remove iron, and the replacement residue is washed with dilute acid and used to extract germanium.
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