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Chemical analysis method of complex crude copper sample

A technology for samples and blister copper, applied in the field of chemical analysis of complex blister copper samples, can solve the problems of inability to adapt to the analysis requirements of complex blister copper samples, difficulty in ensuring the accuracy and stability of analysis results, and uneven quality of blister copper, etc. Reduced concentration time, faster analysis, and power savings

Active Publication Date: 2011-10-26
白银有色红鹭资源综合利用科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, many of the raw materials used by large-scale smelting enterprises are crude products (such as blister copper) obtained by smelting various scrap metals (such as copper) recovered by small-scale smelters; the quality of these crude products, especially blister copper The good and the bad are mixed, and there are many samples containing non-metals. In order to ensure the quality of the smelted products, these blister coppers need to be analyzed; but the current analysis methods can only accurately analyze the uniform blister copper samples, and cannot meet the analysis requirements of the complex blister copper samples. It is difficult to guarantee the accuracy and stability of the analysis results of these blister copper samples, which brings great difficulty to the analysis

Method used

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preparation example Construction

[0034] Preparation of acetic acid-ammonium acetate buffer solution: take 90g of ammonium acetate, add 150ml of water and 100ml of glacial acetic acid, after dissolving, dilute with water to 300ml, mix well, and obtain;

[0035] Step 7: Carry out the configuration and calibration of sodium thiosulfate standard solution according to the standard method;

[0036] Step 8: add 4~5g analytically pure solid potassium iodide in the conical beaker of step 6, and carry out titration with the sodium thiosulfate standard titration solution prepared in step 7, when the solution in the conical beaker becomes pale yellow, the Add 5ml of starch solution with a concentration of 5g / l into the conical beaker, continue to titrate until the solution in the conical beaker is light blue, add 5ml of potassium thiocyanate solution with a concentration of 200g / l, shake, and wait for the precipitation of cuprous iodide After the adsorbed iodine is released, continue titration until the light blue color ...

Embodiment 1

[0045] According to the volume ratio of 1:3, take concentrated nitric acid and water with a density ρ of 1.42 g / ml respectively, add the concentrated nitric acid into the water, and mix well to obtain dilute nitric acid; divide the crude copper sample to be analyzed into sieved The upper sample and the under-sieve sample, the mass percent of the over-sieve sample in the blister copper sample is 98.50%, and the mass percent of the under-sieve sample in the blister copper sample is 1.50%. Weigh 10.0000g of the sample on the sieve, accurate to 0.0001g; put the weighed sample into a 500ml conical beaker, add 50ml of the prepared dilute nitric acid, and cover the watch plate: the violent reaction between the sample on the sieve and dilute nitric acid After the red nitrogen oxide smoke produced stops, add 2ml bromine saturated solution, and then place it on an electric heating plate with a temperature of 200°C and heat it until the bromine red smoke is exhausted. At this time, 9 / 10 o...

Embodiment 2

[0057] Adopt the method of embodiment 1 to analyze thick copper sample, after sample reacts with dilute nitric acid, add 2ml bromine saturated solution, place temperature and be heating on the electric heating plate of 300 ℃; Move 5ml of test solution in the 500ml conical beaker , heated on a 300°C electric heating plate; the mass of solid potassium iodide is 5g; the mass percentage of copper in the blister copper sample is calculated to be 97.45%.

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Abstract

The invention discloses a chemical analysis method of a complex crude copper sample. The method comprises the following steps: dividing a crude copper specimen to be analyzed to an oversize sample and an undersize sample; taking 10.0000g of oversize sample, adding dilute nitric acid, adding saturated bromine solution after the nonproduction of red smog, heating to ensure that red smog can not be generated, adding concentrated nitric acid to ensure that the crude copper sample is completely dissolved; rinsing is performed to ensure that the temperature reaches the room temperature; the solution is diluted to obtain test solution; evaporating 5ml of test solution to be nearly dry, cooling a little, performing water blow wash to ensure that the water just boils, performing blow wash again; adding iron (III) chloride solution, acetic acid-ammonium acetate buffer solution, ammonium bifluoride saturated solution and potassium iodide at the room temperature in turn, using sodium thiosulfate standard titration solution to perform titration; treating the undersize sample according to the method; calculating the weight percentages of copper in the oversize sample and copper in the undersize sample respectively; and calculating the weight percentage of copper in the crude copper specimen. In the analysis method disclosed by the invention, the representative problem of the analyzed sample is fully considered, thus the analysis time can be reduced and the sample can be analyzed accurately.

Description

technical field [0001] The invention belongs to the technical field of metallurgical analysis and relates to a chemical analysis method for complex blister copper samples. Background technique [0002] At present, many of the raw materials used by large-scale smelting enterprises are crude products (such as blister copper) obtained by smelting various scrap metals (such as copper) recovered by small-scale smelters; the quality of these crude products, especially blister copper The good and the bad are mixed, and there are many samples containing non-metals. In order to ensure the quality of the smelted products, these blister coppers need to be analyzed; but the current analysis methods can only accurately analyze the uniform blister copper samples, and cannot meet the analysis requirements of the complex blister copper samples. It is difficult to guarantee the accuracy and stability of the analysis results of these blister copper samples, which brings great difficulty to th...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N1/28G01N1/38
Inventor 乔军孙宏光赵蔚韦应红豆小霞
Owner 白银有色红鹭资源综合利用科技有限公司
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