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Method for comprehensive recovery of rhenium and copper from waste acid of copper smelting

A technology for copper smelting and rhenium-rich slag is applied in the field of high-pressure leaching of targeted rhenium copper-rhenium-rich slag-leaching rhenium in rhenium-rich liquid to prepare potassium perrhenate, and can solve the problems of complex process, low recovery rate and processing time It can improve the precipitation rate, reduce the dosage, and improve the reaction rate.

Active Publication Date: 2018-08-24
ZIJIN MINING GROUP
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for comprehensively recovering rhenium and copper from copper smelting waste acid, aiming to solve the current disadvantages of leaching rhenium and copper from rhenium-rich copper slag, such as complex process, long processing time, and low recovery rate. Form a process with small investment, simple operation, high recovery rate, low cost, low pollution, and easy industrial promotion, and realize high-value utilization of smelting waste acid rhenium resources

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  • Method for comprehensive recovery of rhenium and copper from waste acid of copper smelting
  • Method for comprehensive recovery of rhenium and copper from waste acid of copper smelting

Examples

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Embodiment 1

[0032] In this embodiment, the copper smelting waste acid sulfuric acid concentration is 73.48g / L, the rhenium concentration is 17.94mg / L, the arsenic concentration is 7.58g / L, and the copper concentration is 58.38mg / L. The treatment process and effects are as follows:

[0033] (1) Targeted sinking of rhenium: the waste acid from copper smelting is filtered to remove lead and then pumped to the rhenium-copper precipitation tank. 3 Add 20L of 20% sodium thiosulfate and 20g of sodium sulfide to the waste acid, heat it with steam to 70°C, and stir for 5 minutes; the obtained rhenium-rich slag consists of 2.45% rhenium, 32.22% arsenic, and 8.30% copper; the precipitation rate of rhenium is 99.7%, The arsenic precipitation rate is only 2.78%, and the copper precipitation rate is 99.9%.

[0034] (2) Hot-pressed oxidation leaching of rhenium: The rhenium-rich slag obtained in step (1) was subjected to pressurized oxygen leaching, the leaching conditions were: liquid-solid ratio 6, le...

Embodiment 2

[0039] In this example, the sulfuric acid concentration of copper smelting waste acid is 73.48g / L, the rhenium concentration is 17.94mg / L, the arsenic concentration is 7.58g / L, and the copper concentration is 58.38mg / L. The treatment process and effect are as follows: (1) Targeted rhenium sinking : Pump the waste acid after filtering and removing lead to the rhenium-copper precipitation tank, and use a metering pump at a rate of 1m 3 Add 25L of 20% sodium thiosulfate and 10g of sodium sulfide to the waste acid, heat to 65°C with steam, and stir for 15 minutes. The composition of the obtained rhenium-rich slag is 2.49% rhenium, 25.14% arsenic and 8.42% copper. The precipitation rate of rhenium is 99.7%, that of arsenic is only 2.15%, and that of copper is 99.2%. (2) Hot-pressed oxidation leaching of rhenium: The rhenium-rich slag obtained in step (1) is subjected to pressurized oxygen leaching, the leaching conditions are: liquid-solid ratio 8:1, leaching temperature 130°C, ox...

Embodiment 3

[0043] In this example, the sulfuric acid concentration of copper smelting waste acid is 73.48g / L, the rhenium concentration is 17.94mg / L, the arsenic concentration is 7.58g / L, and the copper concentration is 58.38mg / L. The treatment process and effect are as follows: (1) Targeted rhenium sinking : Pump the waste acid after filtering and removing lead to the rhenium-copper precipitation tank, and use a metering pump at a rate of 1m 3 Add 10L of 20% sodium thiosulfate and 15g of sodium sulfide to the waste acid, heat to 50°C with steam, and stir for 15 minutes. The composition of the obtained rhenium-rich slag is 3.16% rhenium, 30.36% arsenic and 9.66% copper. The precipitation rate of rhenium was 91.5%, that of arsenic was only 1.76%, and that of copper was 88.4%. (2) Hot-pressed oxidation leaching of rhenium: The rhenium-rich slag obtained in step (1) is subjected to pressurized oxygen leaching, the leaching conditions are: liquid-solid ratio 4:1, leaching temperature 150°C,...

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Abstract

A method of comprehensively recovering rhenium and copper from copper smelting waste acid is disclosed. The method includes subjecting the copper smelting waste acid after being filtered to remove lead to targeted rhenium settling to obtain rhenium-rich slag, subjecting the rhenium-rich slag to hot-press oxidation leaching to obtain a rhenium-rich leachate, evaporating and concentrating to make the rhenium concentration 10-20 g / L, performing rhenium settling with KCl, and recrystallizing to obtain potassium perrhenate, and subjecting the liquid after rhenium settling to sulfuration copper settling. The objective of the method is to overcome complex processes, long treatment time, low recovery rates, and other disadvantages of processes recovering rhenium and copper from copper smelting waste acid through leaching at present, and to form a process which is low in investment, simple in operation, high in recovery rate, low in cost, low in pollution and convenient for industrial popularization and application, thus achieving high-value utilization of the rhenium resource in the copper smelting waste acid.

Description

technical field [0001] The invention relates to a method for comprehensively recovering rhenium and copper from copper smelting waste acid, in particular to a method for preparing rhenium from copper smelting waste acid by targeting rhenium-copper-rhenium-rich slag high-pressure leaching-leaching rhenium-rich liquid Potassium rhenate method. Background technique [0002] Rhenium is the densest metal other than uranium group metals. It has very high hardness, wear resistance, and corrosion resistance. It is widely used in petroleum catalysts, aerospace high-temperature superalloys, rhenium alloys in nuclear reactors, and rhenium in military industries. Coating and other fields. Rhenium is a rare and dispersed metal element, which has no independent minerals in nature and is usually associated with other metals. The by-products of the smelting process, such as smelting dust and slag of certain copper ores, platinum group ores, niobium ores, and molybdenum ores, as well as wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B61/00
CPCC22B7/006C22B15/0063C22B61/00Y02P10/20
Inventor 林泓富苏秀珠王俊娥衷水平张焕然刘招平吴健辉刘长东林锦富张衍训熊家春刘晓英
Owner ZIJIN MINING GROUP
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