Method for extracting platinum-palladium out of copper anode mud

A copper anode slime, platinum and palladium technology, applied in the direction of improving process efficiency and other directions, can solve the problems of waste of precious metal resources, affecting gold recovery rate, low platinum and palladium reduction rate, etc., to ensure metal recovery rate, easy control, and stable operation. Effect

Active Publication Date: 2013-09-18
SHANDONG HUMON SMELTING
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Problems solved by technology

[0002] At present, in order to recover platinum and palladium products, many manufacturers of copper anode slime treatment mainly adopt the treatment process of precipitating platinum and palladium from the liquid after primary reduction of gold powder, which affects the recovery rate of gold. The gold content in the liquid after primary reduction is about 2-10mg / L , if the control operation is improper, the loss rate of gold will be higher, and the recovery of platinum and palladium in the liquid after a reduction is directly performed, and the reduction rate of platinum and palladium is also low. The reduction rate of platinum is about 50%, and the reduction rate of palladium is about 60%. It causes waste of precious metal resources such as gold, platinum and palladium, which is not conducive to environmental protection

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  • Method for extracting platinum-palladium out of copper anode mud

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Embodiment example

[0027] Implementation case: Copper anode slime contains the following elements as an example, and its element content is shown in Table 1

[0028] Table 1 Element content of copper anode slime

[0029]

[0030] Take the following process steps:

[0031] aRotary kiln roasting: first add 1t of 93.3% concentrated sulfuric acid to the pulping tank, then add 1t of copper anode slime, make slurry at room temperature for 6 hours, enter the rotary kiln for 5 hours through the automatic feeder, and control the temperature in the first zone of the rotary kiln at 350 °C , the temperature in the second zone is controlled at 480°C, the temperature in the third zone is controlled at 550°C, and the output of calcined sand is 1t; the calcined sand is put into reaction kettle 1, and 7m of clean water is added 3 , 700L of 93.3% sulfuric acid, constant temperature 85°C, react for 2h, put the tank and filter to obtain 700kg of copper and silver leaching residue, and the filtrate enters the tr...

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Abstract

The invention discloses a method for extracting platinum-palladium out of copper anode mud. The method is characterized in that the platinum-palladium is extracted by employing a secondary gold dust chlorination gold leaching liquid, and the method comprises the following process steps of: firstly, carrying out sulfation roasting on the copper anode mud, carrying out primary chlorination gold leaching, carrying out sulfur dioxide gas reduction so as to obtain a primary reduction liquid, and subsequently carrying out zinc powder replacement so as to enrich gold, silver, platinum and palladium into secondary gold powder; secondly, dissolving the secondary gold powder, removing the impurities, filtering the obtained filtered residue, carrying out secondary chlorination gold leaching, adding ammonium chloride and a reduction inhibitor sodium chlorate into the filtered liquid, and reacting so as to obtain platinum and palladium precipitate; and finally reducing the filtered liquid by using a liquid sulfur dioxide to leach the gold. The method is simple in process equipment arrangement and convenient to operate; the recycling rate of the gold in the copper anode mud is increased; and meanwhile the platinum-palladium is effectively enriched in platinum-palladium concentrate.

Description

Technical field: [0001] The invention relates to the technical field of hydrometallurgy technology, in particular to a method for extracting platinum and palladium from copper anode slime. Background technique: [0002] At present, in order to recover platinum and palladium products, many manufacturers of copper anode slime treatment mainly adopt the treatment process of precipitating platinum and palladium from the liquid after primary reduction of gold powder, which affects the recovery rate of gold. The gold content in the liquid after primary reduction is about 2-10mg / L , if the control operation is improper, the loss rate of gold will be higher, and the recovery of platinum and palladium in the liquid after a reduction is directly performed, and the reduction rate of platinum and palladium is also low. The reduction rate of platinum is about 50%, and the reduction rate of palladium is about 60%. Cause precious metal resource waste such as gold platinum palladium, al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/06
CPCY02P10/20
Inventor 王兴崔家友于卫军侯绍军杨晓宇
Owner SHANDONG HUMON SMELTING
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