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Method for continuously and quickly measuring copper and iron in ore leaching solution

A technology for rapid determination and leachate, which is applied in the direction of chemical analysis by titration method and analysis by chemical indicators, etc. It can solve the problems that it is not suitable for rapid analysis of large quantities of ore leachate, the processing time of ore leachate is long, and the operation of the analysis process is cumbersome. Achieve the effects of shortening the analysis and determination time, easy control of the operation process, and reducing pollution

Inactive Publication Date: 2014-07-02
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strong acid treatment of ore leachate takes a long time and causes serious environmental pollution, so it is not suitable for rapid analysis of large quantities of ore leachate
Potassium dichromate titration is used to measure iron. Although the ore leaching solution does not need to be treated, it is necessary to reduce most of the ferric iron with tin dichloride, add sodium tungstate solution, and then reduce the remaining ferric iron with titanium trichloride to A stable blue color appears, and finally back-drip with potassium dichromate solution until it becomes colorless. The analysis process is cumbersome, and it is also not suitable for the rapid analysis of large quantities of ore leachate.

Method used

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  • Method for continuously and quickly measuring copper and iron in ore leaching solution
  • Method for continuously and quickly measuring copper and iron in ore leaching solution

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Pipette 5.00mL of ore leaching solution into a 250mL Erlenmeyer flask, add 2.0mL of hydrogen peroxide, heat the ore leaching solution at low temperature to a volume of 1-2mL, cool to room temperature, and add dropwise acetic acid-ammonium acetate buffer solution with pH ≈ 5 to the solution. The red color no longer deepens and an excess of 2 mL is added dropwise to a saturated solution of ammonium bifluoride until the red color disappears and an excess of 0.5 mL is added. Rinse the wall of the bottle with a small amount of water and shake well. Add 1-2 g of potassium iodide to the solution and shake well. Quickly titrate with sodium thiosulfate standard solution (standard solution titer: fCu=1.5836mg / mL; fFe=1.3917mg / mL) until light yellow. Add 1mL of 5g / L starch solution and continue titrating until the blue just disappears, which is the end point. Consumption of sodium thiosulfate standard solution 7.17mL, copper ion concentration in the solution is 2.27g / L. Add 8.0mL...

Embodiment 2

[0027] Pipette 10.00mL of ore leaching solution into a 100mL volumetric flask, dilute to the mark, shake well, divide 10.00mL of solution into a 250mL Erlenmeyer flask, add 2.0mL of hydrogen peroxide, heat the ore leaching solution at low temperature until the volume is 1-2mL, cool to At room temperature, add acetic acid-ammonium acetate buffer solution with pH ≈ 5 dropwise to the solution until the red color no longer deepens and an excess of 2mL is added, then a saturated solution of ammonium bifluoride is added dropwise until the red color disappears and an excess of 0.5mL is added. Rinse the wall of the bottle with a small amount of water and shake well , add 1~2g of potassium iodide to the solution and shake well. Quickly titrate with sodium thiosulfate standard solution (fCu=1.5836mg / mL; fFe=1.3917mg / mL) until light yellow. Add 1mL of 5g / L starch solution and continue titrating until the blue just disappears, which is the end point. Consumption of sodium thiosulfate sta...

Embodiment 3

[0029] Pipette 10.00mL of ore leaching solution into a 100mL volumetric flask, dilute to the mark, shake well, divide 10.00mL of solution into a 250mL Erlenmeyer flask, add 2.0mL of hydrogen peroxide, heat the ore leaching solution at low temperature until the volume is 1-2mL, cool to At room temperature, add acetic acid-ammonium acetate buffer solution with pH ≈ 5 dropwise to the solution until the red color no longer deepens and an excess of 2mL is added, then a saturated solution of ammonium bifluoride is added dropwise until the red color disappears and an excess of 0.5mL is added. Rinse the wall of the bottle with a small amount of water and shake well , add 1~2g of potassium iodide to the solution and shake well. Quickly titrate with sodium thiosulfate standard solution (fCu=1.5836mg / mL; fFe=1.3917mg / mL) until light yellow. Add 1mL of 5g / L starch solution and continue titrating until the blue just disappears, which is the end point. Consumption of sodium thiosulfate sta...

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Abstract

The invention discloses a method for continuously and quickly measuring copper and iron in an ore leaching solution. The method comprises the following steps: a, adding an oxidizing agent to 5-10mL of a to-be-measured ore leaching solution, and heating at low temperatures till a volume is 1-2mL; b, cooling to room temperature and then adjusting acidity, adding a masking agent to mask the iron, then adding potassium iodide, and titrating the copper by using a sodium thiosulfate standard solution with starch as an indicator; c, adding a demasking agent into the solution with the titrated copper to demask the iron, and standing; and d, titrating the iron by using the sodium thiosulfate standard solution, and simultaneously analyzing and carrying out reagent blank, thus measuring a volume of the sodium thiosulfate standard solution consumed by iron by subtracting the reagent blank from the volume of the consumed sodium thiosulfate standard solution. The masking agent is an ammonium hydrogen fluoride saturated solution which is used for masking completely with an excessive amount of 0.5-1.0mL; the demasking agent is a hydrochloric acid solution of aluminium trichloride; the adding amount of the demasking agent is 5.0-10.0mL. The method is less in pollution to environment and quick; the operation processes are easy to control and master, and thus the method is relatively applicable to analysis and measurement of the copper and the iron in large-batch ore leaching solution; the result is good in accuracy and precision.

Description

technical field [0001] The invention relates to a continuous and rapid analysis method for copper and iron in ore leaching solution, in particular to an analysis method for continuously and rapidly determining copper and iron in ore leaching solution by adding appropriate oxidants to treat ore leaching solution and iodometric method. Background technique [0002] Non-ferrous metal ores, copper and iron are the most common elements. In the process of wet extraction of copper, the copper and iron in the large-scale ore leachate produced need to be continuously and rapidly determined. At present, copper determination methods mainly include iodometric method, spectrophotometry, polarography and atomic absorption spectrometry. Iron determination methods mainly include potassium dichromate titration, cerium sulfate titration, sulfosalicylic acid photometry, o-phenanthroline photometry, and atomic absorption spectrometry. For the determination of copper and iron in ore leaching s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N31/22
Inventor 周成英屈伟宋永胜刘爽
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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