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 consumption of neutralizing alkali and the problems of a large amount of jarosite slag in the iron removal process have not been effectively solved.

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
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Effect test

experiment example

[0058] 1 acidity condition test

[0059] Take 100g-100 mesh (minus 100 mesh) white alloy, according to the calculation, the cobalt and copper in the alloy powder are dissolved, and the theoretical acid consumption of iron left in the slag is 40mL sulfuric acid (98%). Effect of metal leaching rate.

[0060] The leaching test conditions are: temperature 85-90°C, solid-to-liquid ratio 1:7, ammonium bifluoride 8g, sodium chlorate 80g, sulfuric acid amount is 1 times, 1.05 times, 1.15 times of theoretical consumption respectively, and the reaction time is 4h.

[0061] Put 100g of white metal powder into a beaker, add 600ml of water, add 8g of ammonium bifluoride, start stirring (stirring speed is not required, the standard is that the alloy powder does not sink to the bottom), slowly add the test number 1, 2 or 3 in Table 2 After reacting for 1.5 hours, slowly add the prepared sodium chlorate solution with a separatory funnel (the solution has no concentration requirements, and th...

Embodiment 1

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

[0080] The leaching test conditions are: temperature 85-90°C, solid-to-liquid ratio 1:7, ammonium bifluoride 8g, sodium chlorate 80g (used after making a solution, the solution has no concentration requirements, and the sodium chlorate is completely dissolved as the standard), adding sulfuric acid The amount is 1.05 times of 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, start stirring (the stirring speed is not required, it is based on the fact that t...

Embodiment 2

[0083] Put 1 ton of -100 mesh white metal powder into the company's production and use 7.5m 3 PP reactor, add 2m 3 Water, add 60kg of ammonium bifluoride, start stirring (line speed 7m / s, also based on the standard that the alloy powder does not sink to the bottom), add 420L of sulfuric acid, react for 1 hour, and add sodium chlorate solution at a speed of 400L / h through the flow meter , the total consumption of sodium chlorate is 700kg, and when the temperature is higher than 90°C during the reaction, a certain amount of water is added, so that the total volume in the kettle does not exceed 6m 3 As a standard, control the temperature below 100 ° C, after 4 hours of reaction, press filter, the filter cake is slurried with acidified water with a pH value of 2.5, and washed twice in countercurrent, and the washing liquid and the filtrate are mixed evenly to obtain a filtrate of 8.3m 3 (1m 3 =1000L), then analyze the content of relevant elements in the filtrate and filter resid...

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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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