Analysis method for determining copper content in high-tin scrap copper ingots and crude copper

An analysis method, a technology of waste miscellaneous copper, which is applied in the direction of chemical analysis, measuring device, and analysis material by titration method, which can solve the problems that the analysis speed cannot meet the production needs, the interference of copper measurement is not considered, and the analysis process is long. Achieve the effects of easy mastering, improved precision and accuracy, and wide applicability

Inactive Publication Date: 2019-10-22
江西华赣瑞林稀贵金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no standard analysis method for copper in scrap copper ingots and blister copper produced by electronic scrap smelting at home and abroad. There are some domestic standards for the determination of copper: YS/T 521.1-2009, YS/T716.1-2009 And the analysis method of YS/T 910-2013 does not consider the interference of tin to iodometric method to measure copper; while GB/T5121.1-2008 uses electrolysis-atomic...

Method used

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  • Analysis method for determining copper content in high-tin scrap copper ingots and crude copper
  • Analysis method for determining copper content in high-tin scrap copper ingots and crude copper
  • Analysis method for determining copper content in high-tin scrap copper ingots and crude copper

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Experimental program
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Embodiment

[0044] Embodiment: a specific embodiment of the present invention is as follows:

[0045] 1. Reagents, instruments and equipment:

[0046] According to a specific embodiment of the present invention, the analytical method for measuring the amount of copper in high-tin waste miscellaneous copper ingots and blister copper requires reagents, instruments and equipment:

[0047] Unless otherwise stated, only reagents of confirmed analytical grade and deionized or distilled or equivalently pure water were used in the analysis.

[0048] Pure copper sheet (ω Cu ≥99.999%); potassium iodide; anhydrous sodium carbonate; absolute ethanol; hydrochloric acid (ρ1.19g / mL); nitric acid (ρ1.42g / mL); nitric acid solution (volume ratio of nitric acid and water is 1:1); nitric acid solution (volume ratio of nitric acid and water is 1:99); sulfuric acid (ρ1.84g / mL); nitric acid mixed acid (volume ratio of nitric acid and sulfuric acid is 7:3); bromine saturated solution; hydrogen peroxide (mass p...

test approach 22

[0105] According to test method 2.2, change the concentration of nitric acid and observe the dissolution of the sample. The results are shown in Table 1.

[0106] Table 1 Nitric acid selection of different concentrations (n=5)

[0107] serial number Nitric acid and water volume ratio / (40mL) Response speed 1 1+0 violent, splash 2 1+1 fast 3 1+2 slow 4 1+3 slow 5 1+4 very slow

[0108] It can be seen from Table 1 that the speed of the reaction is more appropriate when using nitric acid solution (the volume ratio of nitric acid and water is 1:1) to dissolve the sample. Therefore, nitric acid (the volume ratio of nitric acid and water is 1:1) was used to dissolve the sample in the test.

[0109] 4.2 The choice of the amount of nitric acid and water with a volume ratio of 1:1:

test approach 22

[0110] According to test method 2.2, change the amount of nitric acid solution (the volume ratio of nitric acid and water is 1:1), and observe the dissolution of the sample. The results are shown in Table 2.

[0111] Table 2 nitric acid and water volume ratio is the influence of adding amount of 1:1 (n=5)

[0112] serial number Amount added / mL Dissolving effect 1 10 partially undissolved 2 20 partially undissolved 3 30 to dissolve 4 40 to dissolve 5 50 to dissolve

[0113] It can be seen from Table 2 that the sample can be dissolved by adding 30mL, 40mL, and 50mL. Therefore, the nitric acid solution (the volume ratio of nitric acid and water is 1:1) was selected as 40mL in the test.

[0114] 4.3 Interference test of tin on the determination of copper by iodometric method:

[0115] Carry out according to the test method 2.1, and calculate the recovery rate of copper, investigate the influence of tin on the determination of c...

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Abstract

The invention discloses an analysis method for determining the copper content in high-tin scrap copper ingots and crude copper. Samples are dissolved by nitric acid, tin is precipitated by metastannicacid and separated, and the copper of the filtrate is determined by iodometr so that the precision and the accuracy of the analysis result can be enhanced. An efficient and accurate method for correction of copper by atomic absorption spectrometry after dissolution of filter residue is presented. The method has the advantages of simple operation, easy mastery, good precision, high accuracy and wide applicability and can provide accurate and reliable data support for production process index control, metal balance and trade settlement and meet the needs of production and trade and can also provide theoretical and data support for the formulation of industrial and enterprise standards for scrap copper ingots and crude copper produced by electronic scrap so as to effectively fill the blank of the copper analysis method for the scrap copper ingots and the crude copper produced by the electronic scrap.

Description

technical field [0001] The invention belongs to nonferrous metallurgy analysis technology, in particular, the invention relates to an analysis method for measuring the amount of copper in high-tin scrap copper ingots and blister copper. Background technique [0002] Waste miscellaneous copper ingots and blister copper produced by crushing copper powder from electronic scraps and smelting, in which tin (Sn: 0.50% ~ 10.0%) and other impurities have a high content, in the process of copper metallurgy, tin-containing waste miscellaneous copper ingots and rough copper Copper is further used in anode refining or electrolysis. Therefore, it is of great practical significance to accurately determine the content of copper in tin-containing waste miscellaneous copper ingots and blister copper to guide production and trade. [0003] For samples with high tin content, when the iodometric method is used to determine copper, if the tin is not separated, the analysis result of copper will...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/44G01N31/16
CPCG01N1/44G01N21/3103G01N31/16
Inventor 彭建军刘名红袁鹏程何秀梅毛小晶
Owner 江西华赣瑞林稀贵金属科技有限公司
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