Method for recovering Cu, Cd, Ni, Co and Zn from copper-cadmium slag
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of copper cadmium slag and sponge cadmium, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of inseparability, sponge cadmium is easy to be oxidized or sulfated, etc., to improve quality, low production cost, reduce cost effect
Active Publication Date: 2015-11-04
六盘水中联工贸实业有限公司
View PDF2 Cites 10 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, since the sponge cadmium in the copper cadmium slag mainly exists in the form of sulfate, which is rarely evaporated, it
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0029] Step 1, with H ２ SO 4 At 80~90℃, manganese ore powder 10% or H 2 o 2 5%, liquid / solid=3~4, leaching copper cadmium slag containing 0.57% Cu, 2.32% Cd, 0.19% Ni, 0.044% Co, 45.7% Zn. The leaching time is 2 hours; the pH value of the leaching end point is 2~3. Filter to obtain the leaching solution containing Cu 882mg / L, Cd6955mg / L, Ni366mg / L, Co140mg / L, Zn132g / L, and filter residue with 50g / L H ２ SO 4 , manganese ore powder 5%, at 80~90℃, liquid / solid=3 for the second leaching, the filtrate returns to the first leaching, the average filter residue rate is 6~7%, Cu0.039%, Cd0.19%, Ni0 .0053%, Co0.0023%, Zn4.1%.
[0030] Step 2, use the primary acid leaching solution of step 1 to extract Cu by Cp180, compared with / water=1.5~2, Cp180 30~40%, kerosene 60~70%, three-stage extraction, two-stage 250g / L H ２ SO 4 Stripping, primary 5%NH 4 HCO 3Wash and regenerate. The raffinate contains Cu 3mg / L, and the extraction rate is 99.6%. The back extraction liquid contains Cu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a method for recovering Cu, Cd, Ni, Co and Zn from copper-cadmium slag. The copper-cadmium slag is subjected to two times of oxidizing acid leaching, and Cu is extracted from leach liquor; after Fe in raffinate is removed through neutralization oxidation, Ni and Co are precipitated through cobalt purification reagents, and Co and Ni concentrate is obtained through calcinations; after liquor obtained after Co precipitation is subjected to activated carbon adsorption, an electrolytic metal zinc plate is used for replacing spongy cadmium, and a metal cadmium ingot is obtained through melting; and liquor after replacement is delivered to a zinc electrolyzing system. H2SO4 leaching is adopted during the two times of oxidizing acid leaching, and the final PH value after the first time of oxidizing acid leaching is 2 to 3; in the second time of oxidizing acid leaching, the concentration is 50-100 g/L, time is 2 hours, and an oxidizing agent is MnO2 of 5-10% or H2O2 of 5-10%; extraction agents of copper are Cp180 of 20-40% and kerosene of 60-80%, the extraction PH value is 2 to 3, the concentration of reverse extraction H2SO4 is 250-300 g/L, and three levels of extraction, two levels of reverse extraction and two levels of regeneration from washing are carried out; the amount of the cobalt purification reagents is 1.2-1.4 times the sum of the content of Co and the content of Ni, and the temperature ranges from 50 DEG C to 60 DEG C; the replacement PH value of the spongy cadmium is 3 to 4, and the temperature ranges from 40 DEG C to 50 DEG C. According to the method, the process is short, and the recovery rate is high.
Description
technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a method for recovering Cu, Cd, Ni, Co and Zn from copper-cadmium slag. Background technique [0002] The copper cadmium slag produced by hydrometallurgy generally contains more than 0.5% Cu, more than 2% Cd, more than 0.2% Ni, more than 0.03% Co, and more than 40% Zn. With the extension of time, Cu, Cd, Ni, Co, and Zn mainly exist in the form of oxidation state and sulfate, which are easy to be absorbed by H ２ SO 4 leaching. The traditional process is to firstly carry out neutral leaching pH5.2~5.4, first leaching Zn, Cd, and then carrying out acid leaching Cu, Co, Ni, but practice has proved that a considerable part of Cu, Co, Ni is leaching, and the acid leaching stage Zn and Cd are also relatively high, which cannot meet the requirements of selective leaching. Therefore, when zinc powder is used to replace Cd in the immersion solution, Cu, Co, and Ni are also...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more