Method for recovering copper and zinc element in copper soot by microwave reduction roasting-sulfuric acid leaching

A technology for recovering copper and copper soot, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of complex processing technology, achieve the effects of lower process temperature, faster heating rate, and lower recycling costs

Inactive Publication Date: 2019-05-10
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As another example, the Chinese patent application No. 201510494775.3 discloses a method for processing soot from a smelting furnace. The application includes the following steps: (1) reduction roasting; (2) high pressure oxygen leaching; (3) recovery of lead; (4) recovery of copper; (5) recovery of zinc, the processing method of this application can effectively recover the lead, copper and zinc in the soot of the smelting furnace, but the processing technology is relatively complicated, and high pressure oxygen leaching is required deal with

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  • Method for recovering copper and zinc element in copper soot by microwave reduction roasting-sulfuric acid leaching

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Embodiment 1

[0034] combine figure 1 , a method of microwave reduction roasting-sulfuric acid leaching of the present embodiment reclaims copper and zinc elements in copper soot, comprising the following steps:

[0035] Step 1. Microwave reduction roasting:

[0036] Copper soot and carbon with 10% of the total amount of copper soot were mixed and ground for 5 minutes, and then put into a microwave oven for carbon thermal reduction roasting for 2 hours at a roasting temperature of 750°C.

[0037] Step 2, sulfuric acid leaching of copper and zinc:

[0038] The leaching is carried out in a 500ml three-hole boiler, heated by a water bath, and the water bath is turned on to set a predetermined temperature for preheating. Add it into a three-hole flask, connect an electric stirrer, and when the temperature of the thermocouple reaches the temperature required for the experiment, quickly pour in the weighed copper soot (5g), turn on the stirrer, observe the temperature change of the thermocouple...

Embodiment 2

[0042] A method of microwave reduction roasting-sulfuric acid leaching of the present embodiment reclaims copper and zinc elements in copper soot, comprising the following steps:

[0043] Step 1. Microwave reduction roasting:

[0044] Copper soot and carbon with 5% of the total amount of copper soot were mixed and ground for 8 minutes, and then put into a microwave oven for carbon thermal reduction roasting for 0.5 hour at a roasting temperature of 900°C.

[0045] Step 2, sulfuric acid leaching of copper and zinc:

[0046] The leaching is carried out in a 500ml three-hole boiler, heated by a water bath, and the water bath is turned on to set a predetermined temperature for preheating. Add it into a three-hole flask, connect an electric stirrer, and when the temperature of the thermocouple reaches the temperature required for the experiment, quickly pour in the weighed copper soot (5g), turn on the stirrer, observe the temperature change of the thermocouple, and start the calc...

Embodiment 3

[0051] A method of microwave reduction roasting-sulfuric acid leaching of the present embodiment reclaims copper and zinc elements in copper soot, comprising the following steps:

[0052] Step 1. Microwave reduction roasting:

[0053] Copper soot and carbon with 20% of the total amount of copper soot were mixed and ground for 10 minutes, and then put into a microwave oven for carbothermal reduction roasting for 4 hours at a roasting temperature of 600°C.

[0054] Step 2, sulfuric acid leaching of copper and zinc:

[0055] The leaching is carried out in a 500ml three-hole boiler, heated by a water bath, and the water bath is turned on to set a predetermined temperature for preheating. Add it into a three-hole flask, connect an electric stirrer, and when the temperature of the thermocouple reaches the temperature required for the experiment, quickly pour in the weighed copper soot (5g), turn on the stirrer, observe the temperature change of the thermocouple, and start the calcu...

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Abstract

The invention discloses a method for recovering copper and zinc element in copper soot by microwave reduction roasting-sulfuric acid leaching, and belongs to the technical field of metallic element recovery. The method includes steps of microwave reduction roasting, sulfuric acid leaching of copper and zinc, zinc powder replacement, and electrolytic deposition of zinc sulfate. According to the method, the leaching rate the copper and the zinc element in copper soot can be effectively improved to be as high as 95% by adopting the microwave reduction roasting-sulfuric acid leaching process, acidconsumption and energy consumption are effectively reduced, production costs are relatively low, and the needs of economic development of China are met.

Description

technical field [0001] The invention belongs to the technical field of metal element recovery, and more specifically relates to a microwave reduction roasting-sulfuric acid leaching method for recovering copper and zinc elements in copper soot. Background technique [0002] With the development of human society and technological progress, recycled nonferrous metals account for about 30% of the total output of nonferrous metals. Copper soot is the part where most of the volatile elements such as Zn, Pb, etc. and a small amount of Cu volatilize into the gas phase, and the flue gas generated during the smelting process is collected by the dust removal system. Copper soot is generally off-white or dark white, with fine particle size and a bulk density of 0.25g / cm 3 Left and right, the bulk specific gravity is 0.2-0.3, and the water immersion solution has a pH of 3-3.5, which is hygroscopic and easy to agglomerate when stored for a long time. In copper matte smelting, the accum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B7/02C22B15/00C22B19/30C22B19/20C25C1/16
CPCY02P10/20
Inventor 雷鹰王鑫李雨陈雯郑睿廖振鸿
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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