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Process method for treating thiram sodium cobalt slag

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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 cobalt slag are high, and a kind of process method for processing formamic cobalt slag with low equipment investment and production cost is provided for this reason

Method used

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  • Process method for treating thiram sodium cobalt slag
  • Process method for treating thiram sodium cobalt slag

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...

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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

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B3/38C22B19/20C22B19/30C22B23/00C22B23/02
CPCC22B7/001C22B7/006C22B1/02C22B19/22C22B19/30C22B23/02C22B23/0476C22B3/3844C22B3/3846Y02P10/20
Inventor 俞鹰钱俊杰潘荣选陈海大申其新方支灵江少杰陈胜进曹建成
Owner TONGLING NON FERROUS METAL GROUP CORP
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