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Method for germanium separation by inorganic precipitation of zinc hydrometallurgy solution

A technology of hydrometallurgy and inorganic precipitation, which is applied to the improvement of process efficiency, can solve the problems of large consumption of tannin, large consumption of germanium in tannin deposition, and loss of germanium, so as to avoid the generation of hydrogen arsine, Easy subsequent processing, clean and efficient process

Active Publication Date: 2020-11-27
KUNMING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses an oxynitrogen compound called ferrochromene or pyridylmethane sulfonamide to control the temperatures at different stages during hydrometallurgery processes used by gold miners. By controlling these factors, it allows for better understanding how certain metals like molybdenum and vanadium behave differently under specific environmental parameters. It also includes methods for collecting pure crystallized silicon dioxides containing both gallium and manganese atoms, making them easier to separate and concentrate into useful products. Overall, this method provides technical benefits over existing techniques involving chemical treatment and physical removal of impurities on metal surfaces.

Problems solved by technology

Technological Problem: Current processes for purifying rare earth elements (gold) such as Germanium involve various steps like extraction, separation, solvent treatment, etc., but these techniques have limitations due to their complexity and expensive materials involved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Precipitation and separation of germanium was carried out using a germanium-rich zinc oxide fume leach solution (Zn 142 g / L, Fe 8.52 g / L, Ge 0.167 g / L, pH 1.56) as a raw material;

[0022] The method for separating germanium by inorganic precipitation in zinc hydrometallurgy solution, the specific steps are as follows:

[0023] (1) By controlling the acidity at the end point of the hydro-smelting zinc leaching process, the pH value of the hydro-smelting zinc leaching solution is adjusted to 1.0-2.0; the pH of the germanium-rich zinc oxide fume leaching solution in this embodiment is 1.56, and no further adjustment is required;

[0024] (2) The temperature of the zinc hydro-smelting solution is 50°C, and air is introduced into the zinc hydro-smelting solution to react with ferrous ions until the ferric ion concentration is 4.11g / L to obtain solution A;

[0025] (3) Heat the mixed liquid A to a temperature of 70~75°C for 3 hours to react for 3 hours, so that ir...

Embodiment 2

[0027] Example 2: Precipitation and separation of germanium was carried out using a germanium-rich zinc oxide fume leaching solution (Zn 139 g / L, Fe 10.33 g / L, Ge 0.289 g / L, pH 3.11) as a raw material;

[0028] The method for separating germanium by inorganic precipitation in zinc hydrometallurgy solution, the specific steps are as follows:

[0029] (1) Regulate the pH value of the hydro-smelting zinc leaching solution to 1.12 through the hydro-smelting zinc waste electrolyte;

[0030] (2) The temperature of the zinc hydrometallurgy solution is 55°C, and air is introduced into the zinc hydrometallurgy solution to react with ferrous ions until the ferric ion concentration is 5.93g / L to obtain solution A;

[0031] (3) Raise the temperature of the mixture A to a temperature of 80~85°C and react for 4 hours, so that iron ions and germanate ions are precipitated synchronously to form germanium slag, and the germanium content in the germanium slag is mainly Fe 3 GeO 2 (OH) 5 (SO ...

Embodiment 3

[0033] Example 3: Precipitation and separation of germanium was carried out using a germanium-rich zinc oxide fume leach solution (Zn 145 g / L, Fe 6.85 g / L, Ge 0.096 g / L, pH 2.72) as a raw material;

[0034] The method for separating germanium by inorganic precipitation in zinc hydrometallurgy solution, the specific steps are as follows:

[0035] (1) Regulate the pH value of the hydro-smelting zinc leaching solution to 1.98 through the hydro-smelting zinc waste electrolyte;

[0036] (2) The temperature of the zinc hydrometallurgy solution is 60°C, and air is introduced into the zinc hydrometallurgy solution to react with ferrous ions until the ferric ion concentration is 5.21g / L to obtain solution A;

[0037] (3) Raise the temperature of the mixture A to a temperature of 95~100°C for 3 hours to react for 3 hours, so that iron ions and germanate ions are precipitated simultaneously to form a germanium deposit slag, and the germanium object in the germanium deposit slag is mainly...

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PUM

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Abstract

The invention relates to a method for germanium separation by inorganic precipitation of a zinc hydrometallurgy solution, and belongs to the technical field of hydrometallurgy. A pH value of a zinc hydrometallurgy infusion solution is adjusted to be 1.0 to 2.0, air or oxygen-enriched gas is pumped into the zinc hydrometallurgy infusion solution to react to the ferric ion concentration of 4-6g/L, uniform temperature rising is carried out to the temperature of 70-100 DEG C for reaction for 2-4h, and ferric ions and germanium acid radical ions are synchronously precipitated to form precipitated germanium slag. According to the method for the germanium separation by the inorganic precipitation of the zinc hydrometallurgy solution, non-organic system enriched germanium is adopted, a tannic acidprecipitated germanium technology can be completely replaced, germanium is recycled from a leaching solution without tannic acid, extraction agents, ion-exchange resin and other organic reagents, theintroduction of organic matter in the zinc hydrometallurgy solution is avoided without zinc powder displacement, and the generation of arsenic hydride is avoided.

Description

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Claims

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Application Information

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Owner KUNMING UNIV OF SCI & TECH
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