Method for leaching copper-cobalt alloy

A copper-cobalt and alloy technology, applied in the field of copper and cobalt leaching, can solve the problem of jarosite slag not being effectively solved, and achieve the effects of wide initial temperature range, simplified operation and shortened process.

Inactive Publication Date: 2011-04-20
彭国伟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the final direct acid leaching or oxidative acid leaching process, since iron is also leached while leaching cobalt, the consump

Method used

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  • Method for leaching copper-cobalt alloy
  • Method for leaching copper-cobalt alloy
  • Method for leaching copper-cobalt alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Experimental example

[0058] 1 Acid content test

[0059] Take 100g-100 mesh (minus 100 mesh) white alloy, according to calculation, dissolve the cobalt and copper in the alloy powder, and the theoretical acid consumption of iron left in the slag is 40mL sulfuric acid (98%). It is considered that the amount of acid is valuable The influence of metal leaching rate.

[0060] The leaching experiment conditions were as follows: temperature 85~90℃, solid-liquid ratio 1:7, 8g ammonium bifluoride, 80g sodium chlorate, and the amount of sulfuric acid was operated at 1 time, 1.05 times and 1.15 times the theoretical consumption, and the reaction time was 4h.

[0061] Put 100g of white alloy powder into a beaker, add 600ml of water, add 8g of ammonium bifluoride, start stirring (the stirring speed is not required, the alloy powder does not sink to the bottom as the standard), slowly add the test number 1, 2 or 3 in Table 2 After reacting for 1.5 hours, use a separatory funnel to slowly...

Example Embodiment

[0078] Example 1

[0079] Weigh 100g-100 mesh (minus 100 mesh) white alloy powder. According to calculations, the theoretical acid consumption of cobalt and copper dissolved in the alloy powder and iron left in the slag is 40 mL sulfuric acid (98%); press copper + cobalt + The theoretical iron consumption of sodium chlorate is 76g; SiF is formed according to silicon 6 2- NH 4 HF 2 The theoretical consumption is 6g.

[0080] The leaching experiment conditions are as follows: temperature 85~90℃, solid-liquid ratio 1:7, 8g ammonium bifluoride, 80g sodium chlorate (use after preparing the solution, the solution has no concentration requirement, the standard is to dissolve all sodium chlorate), add sulfuric acid The amount is 1.05 times the theoretical consumption, and the reaction time is 4h.

[0081] Put 100g of white metal powder into a beaker, add 600ml of water, add 8g of ammonium bifluoride, turn on the stirring (the stirring speed is not required, the alloy powder does not sink to...

Example Embodiment

[0082] Example 2

[0083] Put 1 ton-100 mesh white alloy powder into the company's production 7.5m 3 Add 2m to the PP reactor 3 Water, add 60kg ammonium bifluoride, start stirring (linear speed 7m / s, the same as alloy powder not sinking as the standard), add 420L sulfuric acid, after reacting for 1 hour, add sodium chlorate solution at 400L / h through flow meter , Sodium chlorate consumption totals 700kg. When the temperature during the reaction is higher than 90℃, add a certain amount of water so that the total volume in the kettle does not exceed 6m 3 As the standard, control the temperature below 100℃, after 4 hours of reaction, press filtration, the filter cake is slurried with acidified water with pH value of 2.5 and washed twice in countercurrent, the washing liquid and the filtrate are mixed uniformly to obtain a filtrate of 8.3m 3 (1m 3 =1000L), and then analyze the content of relevant elements in the filtrate and filter residue. The test results are shown in Table 5.

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Abstract

The invention belongs to the field of alloy treatment and provides a method for leaching copper-cobalt alloy. The method comprises the following steps of: adding a proper amount of water and cosolvents to copper-cobalt alloy powder with the particle size of -100 meshes, adding an acid solution while stirring, reacting for 1.2 hours and then adding oxidizing agents, simultaneously replenishing water and controlling the reaction temperature below 100 DEG C until the whole reaction is finished after 3-4 hours, and then carrying out filter pressing and collecting filtered liquid, wherein the solid-to-liquid ratio in a reaction process is 1:5-1:10; the cosolvents are selected from fluorides and the consumption of the cosolvents is more than 0.8 time of a theoretical consumption level for forming SiF62-; the consumption of acid is 1.05-1.2 times of the theoretical acid-consumed level of copper and cobalt; and the consumption of oxidizing agents is 0.8-1.0 time of the copper-cobalt-ferrum oxidizing agents. The method has the advantages of safety, environmental protection, high reaction speed and no special requirement for production equipment because the whole process is carried out under a normal pressure, and the disposable leaching rate of the copper and the cobalt is not less than 95%.

Description

technical field [0001] The invention belongs to the field of alloy treatment, in particular to a method for leaching cobalt and copper from copper-cobalt alloys. Background technique [0002] Copper-cobalt alloy (including white alloy and red alloy) is one of the main forms of rough-processed products of Congo (Kinshasa) cobalt-copper ore at present, and it is also one of the main cobalt raw materials imported from Africa in the future by my country. The alloy with high copper content is due to its The appearance is mainly red of copper, which is called red alloy; the color of materials with low copper content is white and slightly yellow when fresh, so people are used to calling it white alloy. Copper-cobalt alloys are divided into two types according to their sources. One is the converter slag obtained during the converter blowing process in the copper smelting process, and then the alloy containing Co, Cu, Fe and other elements obtained by electric furnace reduction smelti...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B15/00C22B23/00
CPCY02P10/20
Inventor 彭国伟
Owner 彭国伟
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