Process method for treating thiram sodium cobalt 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 cobalt fumarate slag and process method, which is applied in the direction of improving process efficiency, etc., can solve the problems of high equipment investment and production cost, and achieve the effects of reducing equipment investment, reducing cadmium content, and simplifying the treatment process
Active Publication Date: 2019-10-22
TONGLING NON FERROUS METAL GROUP CORP +1
View PDF5 Cites 11 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
[0007] The technical problem to be solved in the present invention is that the existing process equipment investment and production cost of processing formamic...
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 1
[0026] Example 1: Zinc was eluted with low-acid acid elution for the cobalt slag of forma in the composition table 1, the liquid-solid ratio (mL / g) was 1:1, normal temperature, the leaching time was 0.5 h, the temperature was 40°C, and the acidity of sulfuric acid was 100g / L, the extraction rate of zinc and iron is 97.2%, 92.4%; cobalt and cadmium are hardly dissolved (cobalt, cadmium and precipitant sodium formex are strongly chelated), the pickling slag contains 26.65% cobalt, and the slag rate is 24.7%;
[0027] Roasting of pickling slag: 200g of pickling slag, 10wt% sodium persulfate, 200°C calcination time, 0.5h calcination time; sulfation slag roasting at 300°C calcination temperature, 0.5h calcination time, calcination slag The rate is 30.78%;
[0028] Water leaching includes adding water to the crude cobalt sulfate obtained by roasting at a liquid-solid ratio of 10:1 for stirring and leaching. The reaction temperature is 90°C and the time is 2 hours. The slurry is vac...
Embodiment 2
[0032] Example 2: Zinc was eluted with low-acid acid elution for the cobalt slag of sodium formazan in the composition table 1, the liquid-solid ratio (mL / g) was 10:1, normal temperature, the leaching time was 2 h, the temperature was 70 °C, and the acidity of sulfuric acid was 10 g / L, the extraction rate of zinc and iron is 97.32% and 91.36%; cobalt and cadmium are almost not dissolved (cobalt, cadmium and precipitant sodium formex are strongly chelated), and the pickling slag contains 26.97% cobalt.
[0033] Oxidative roasting of pickling slag: pickling slag 200g, sodium persulfate added at 30wt%, roasting temperature 300 °C, roasting time 1 h; then heat up for sulfation roasting: roasting temperature 500 °C, roasting time 2 h, roasting The slag rate is 31.5%;
[0034] Water leaching includes adding water to the crude cobalt sulfate obtained by roasting at a liquid-solid ratio of 1:1, stirring and leaching, the reaction temperature is 40°C, and the time is 0.5h. Vacuum filt...
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 discloses a process method for treating thiram sodium cobalt slag. The method comprises the following steps that (1) acid washing and zinc removing are carried out; (2) roasting is carried out; (3) water leaching is carried out; (4) extracting and purifying are carried out; (5), ammonium oxalate precipitating is carried out, and (6) cobalt oxalate calcining is carried out, wherein the roasting process comprises the steps that 10 wt%-30 wt% of sodium persulfate is added into acid washed slag obtained by acid washing and zinc removing, and then the mixture is heated for secondary roasting after being subjected to primary roasting. The method has the beneficial effects that most of zinc can be recycled by low-pressure acid washing in the acid washing process, high-temperature pressurizing leaching and other strengthening means are not needed, so that the equipment investment and the production cost are reduced; and sodium sulfate is used as a roasting additive, so oxygen generated during decomposing is used for providing an enhanced oxidizing atmosphere for thermal decomposition, the generated sodium sulfate is used for replacing common concentrated sulfuric acid, so that the generation of acid mist is reduced, a compact oxidation film formed on the surface layer of an ore grain can be destroyed, so that cobalt oxide on an inner layer is continued to be in contact with O2, SO2 and SO3, complete sulfating is achieved, and the recycling rate of cobalt is improved.
Description
technical field [0001] The invention relates to the field of comprehensive utilization of nonferrous metals, in particular to a process method for processing formex cobalt slag. Background technique [0002] In the production process of zinc hydrometallurgy, the impurities in the zinc sulfate leaching solution that affect the product quality mainly include copper, cadmium, cobalt, nickel, arsenic, antimony, germanium and other elements. For copper, cadmium, arsenic, antimony, and germanium, zinc powder is commonly used in existing production to remove them, and the process is relatively mature. However, nickel and cobalt are difficult to remove. At present, the methods for removing nickel and cobalt used in the leachate purification process at home and abroad are mainly zinc powder replacement method and organic reagent method. The specific cobalt removal methods mainly include zinc powder-arsenic salt method, zinc powder-antimony salt method, xanthate method, and β-naphthi...
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