Device and process for adsorbing precious metal in acid wastewater in gold purifying process

Abstract

The invention discloses a device and process for adsorbing precious metal in acid wastewater in the gold purifying process. The device comprises a base, a depositing mechanism, a wastewater purifyingmechanism, an activated carbon purifying mechanism and a mechanical arm. In use, gold-containing acid wastewater is pumped by a second anti-corrosion fluorine magnetic pump into an activated carbon adsorbing tank, the wastewater adsorbed by activated carbon returns into a wastewater storage tank through a pipeline G3, a closed-loop circulating system is formed, the gold in the wastewater is sufficiently adsorbed by the activated carbon, the activated carbon can be converted from acid to alkali so as to meet the requirements of the electrolysis process and ensure the process safety when the grade of the gold contained in the activated carbon in the activated carbon adsorbing tank reaches 4500 g / t or above, the loss of the precious metal in the acid wastewater in a gold purifying workshop iseffectively avoided, work efficiency is improved, labor cost is reduced, workers are prevented from making direct contact with the activated carbon, the operation safety and environment safety are ensured for the workers, and the discharge water of the adsorbed acid wastewater reaches the national sewage discharge standard.

Description

technical field [0001] The invention belongs to the technical field of acid gold purification, and in particular relates to a precious metal adsorption device and process in acidic waste liquid of a gold purification process. Background technique [0002] With the development of gold purification technology, general gold concentrators will be equipped with a complete set of analytical electrolysis equipment and gold purification and smelting equipment. At present, the more commonly used gold purification equipment is reactor, and the purification process is acid purification, that is, hydrochloric acid is firstly used / Nitric acid impurity removal-aqua regia soluble gold-reduction gold process, a small amount of precious liquid is likely to remain in the equipment for storing aqua regia precious liquid and in the delivery pipeline of this process, which cannot be fully recovered. After repeated dilutions, there are still some residues, even if the precious liquid is reduced ...

AI Technical Summary

Problems solved by technology

[0002] With the development of gold purification technology, general gold concentrators will be equipped with a complete set of analytical electrolysis equipment and gold purification and smelting equipment. At present, the more commonly used gold purification equipment is reactor, and the purification process is acid purification, that is, hydrochloric acid is firstly used / Nitric acid impurity removal-aqua regia soluble gold-reduction gold process, a small amount of precious liquid is likely to remain in the equipment for storing aqua regia precious liquid and in the delivery pipeline of this process, which cannot be fully recovered. After repeated dilutions, there are still some residues, even if the precious liquid is reduced After repeated use of the poor solution, there are still some precious metals remaining. When the gold grade is lower than a certain value or accumulated to a certain amount, repeated use will increase the cost and need to be discharged. Because it is an acidic solution, It cannot be returned to the alkaline leaching process for reuse. The general treatment method is to discharge the waste liquid directly into the ditch after being adsorbed by an activated carbon adsorption device, and then discharged after neutralization treatment.

[0003] The original activated carbon adsorption device is poorly set up, using plastic vats to store activated carbon, which requires manual loading and unloading and reloading of activated carbon. The operation is cumbersome, and it wastes labor and low work efficiency. The waste acid storage tank is not equipped with an acid gas discharge pipeline, which often leads to poor working environment. , affecting the health of workers

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