Determination method for cadmium amount in copper slag

A technology of copper slag and constant volume, which is applied in the detection field, can solve problems such as unsuitable for popularization and application, many interfering elements, and high analysis cost, and achieve the effects of good precision, fast analysis speed, and accurate and reliable data

Active Publication Date: 2014-09-17
BAIYIN NONFERROUS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The product after recovering the valuable metal zinc and cadmium from copper cadmium slag is copper slag. For the determination of cadmium in copper slag, atomic absorption spectrometry has been used to determine the amount of cadmium. This method has large analysis errors and many interfering elements; ICP- The results of the AES method are relatively stable and reliable, but the analysis cost is high, so it is not suitable for popularization and application

Method used

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  • Determination method for cadmium amount in copper slag
  • Determination method for cadmium amount in copper slag
  • Determination method for cadmium amount in copper slag

Examples

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Effect test

Embodiment 1

[0039]Weigh 5 parts of 0.1000g copper slag into a 100mL beaker, add 5, 8, 10, 12, 15mL of hydrochloric acid (ρ1.19g / mL) and heat for a few minutes, then add 3mL of nitric acid (ρ1.42g / mL) to test completely disassembled. Evaporate to a small volume, add 3-5mL hydrochloric acid (ρ1.19g / mL) and evaporate to near dryness. Rinse the watch glass and cup wall with water, and boil slightly to dissolve the soluble salt. Take it off, add ascorbic acid to make the yellow color of ferric iron in the solution completely disappear and the excess is about 0.1g. Transfer the solution into a 50mL volumetric flask filled with 25mL of 10% hydrochloric acid-10% ammonium acetate bottom solution, clean the beaker, dilute to the mark, shake well, and set aside. Pour the sample solution prepared above into the electrolytic cup, and take pictures with the oscilloscope polarograph. Anodization, two-pole derivative wave, origin potential -224mV, peak potential -600mV or so, measure its peak value, p...

Embodiment 2

[0044] Weigh 5 parts of 0.1000g copper slag into a 100mL beaker, add 10mL hydrochloric acid (ρ1.19g / mL) and heat for a few minutes, then add 1, 2, 3, 4, 5mL nitric acid (ρ1.42g / mL) to test The sample was completely decomposed, evaporated to a small volume, added 3-5mL hydrochloric acid (ρ1.19g / mL) and evaporated to near dryness. Rinse the watch glass and cup wall with water, and boil slightly to dissolve the soluble salt. Take it off, add ascorbic acid to make the yellow color of ferric iron in the solution completely disappear and the excess is about 0.1g. Transfer the solution into a 50mL volumetric flask filled with 25mL of 10% hydrochloric acid-10% ammonium acetate base solution in advance, clean the beaker, dilute to the mark, shake well, and set aside. Pour the sample solution prepared above into the electrolytic cup, and take pictures with the oscilloscope polarograph. Anodization, two-pole derivative wave, origin potential -224mV, peak potential -600mV or so, measure...

Embodiment 3

[0049] Weigh 10 parts of 0.1000g copper slag into a 100mL beaker, add 10mL hydrochloric acid (ρ1.19g / mL) and heat for several minutes, then add 3mL nitric acid (ρ1.42g / mL) to completely decompose the sample, steam to a small volume , add 3-5mL hydrochloric acid (ρ1.19g / mL) and evaporate to near dryness. Rinse the watch glass and cup wall with water, and boil slightly to dissolve the soluble salt. Take it off, add ascorbic acid to make the yellow color of ferric iron in the solution completely disappear and the excess is about 0.1g. Transfer the solution into 25mL pre-filled with 10% ammonium acetate-5% hydrochloric acid, 10% ammonium acetate-9% hydrochloric acid, 10% ammonium acetate-10% hydrochloric acid, 10% ammonium acetate-12% hydrochloric acid, 10% acetic acid Ammonium—15% hydrochloric acid, 10% hydrochloric acid—5% ammonium acetate, 10% hydrochloric acid—9% ammonium acetate, 10% hydrochloric acid—10% ammonium acetate, 10% hydrochloric acid—15% ammonium acetate, 10% hydr...

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Abstract

The invention discloses a determination method for cadmium amount in copper slag. The determination method disclosed by the invention adopts an oscillographic polarography which comprises the following steps: taking hydrochloric acid-ammonium acetate as a base solution, pouring a prepared sample solution into an electrolysis cup for oscillographic polarograph photoplotting, and anodizing dipolar derivative waves, starting scanning when an origin potential is -224 mV, and measuring an output peak value; transferring and taking a pure cadmium standard solution along with a sample to obtain the output peak value of the pure cadmium standard solution; calculating the cadmium content in the copper slag sample by using a standard contrast method according to the concentration and the output peak value of the standard solution. Compared with a classic hydrochloric acid base solution method and an ammoniacal base solution method, the analysis method for determining the cadmium amount in copper slag by using the oscillographic polarography disclosed by the invention is stable in waveform and quite high in accuracy; the method is easy and fast, and also eliminates the influence of ammonia gas on a human body; moreover, the determination method is good in precision and high in analysis speed, can meet the requirement for rapid analysis in production, meanwhile provides accurate and reliable data, so as to play a good role in guiding production.

Description

technical field [0001] The invention relates to a detection method, in particular to a method for quickly and accurately measuring the cadmium content in copper slag in a liquid cleaning workshop. Background technique [0002] In the zinc hydrometallurgy process, copper cadmium slag is produced when the zinc sulfate solution is purified, and the copper cadmium slag mainly contains valuable metal elements such as copper, cadmium, and zinc. The comprehensive recovery of these valuable metal elements can not only comprehensively utilize raw materials and protect the environment, but also increase the metal recovery rate and reduce production costs. The product after recovering the valuable metal zinc and cadmium from copper cadmium slag is copper slag. For the determination of cadmium in copper slag, atomic absorption spectrometry has been used to determine the amount of cadmium. This method has large analysis errors and many interfering elements; ICP- The determination result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 武逸云展宗波石镇泰冶玉花牛艳红高品芳
Owner BAIYIN NONFERROUS GROUP
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