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Method for detecting copper in electronic waste

A technology of electronic waste and detection method, which is applied in the fields of chemistry and metallurgy, can solve the problems of repeatability and poor accuracy of analysis results, and achieve the effect of objective and true analysis results, high efficiency and strong practicability

Pending Publication Date: 2020-11-24
CHUXIONG DIANZHONG NON FERROUS METALS LLC +1
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Problems solved by technology

[0003] In order to overcome the problems existing in the background technology, the present invention provides a method for detecting copper in electronic waste, which ensures that the sample can be completely decomposed, so as to solve the problems of poor repeatability and accuracy of analysis results caused by existing detection technologies and methods

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  • Method for detecting copper in electronic waste
  • Method for detecting copper in electronic waste
  • Method for detecting copper in electronic waste

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Embodiment

[0028] Technical method of the present invention, the steps are as follows:

[0029] 1) Weighing: Put a piece of filter paper on the electronic balance, weigh 0.20~0.30g (accurate to 0.0001g) of the sample on the filter paper, fold and compact the filter paper and put it into a 50mL porcelain crucible with 5 layers of filter paper . The sample is wrapped with filter paper to prevent the sample from splashing loss and sticking to the bottom of the crucible during carbonization and ashing.

[0030] 2) Carbonization: Put the porcelain crucible containing the sample into the muffle furnace at room temperature, close the furnace door, set the temperature to 500°C, turn on the muffle furnace to burn, and heat up to 500°C within 30-40min, and the carbonization will be destroyed at low temperature Organic matter (polycarbonate resin, polyethylene, etc.), convert the organic matter in the sample into carbonaceous, when the temperature reaches 500 ° C, keep it warm for 15 minutes. Slo...

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Abstract

The invention relates to a method for detecting copper in electronic waste, and belongs to the technical field of chemistry and metallurgy. The method comprises the following steps of: 1) weighing a sample; 2) carbonizing; 3) ashing; 4) transferring the sample; 5) decomposing the sample; and 6) determining the copper content by iodometry. According to the method, organic matters are carbonized bylow-temperature firing so that sample splashing and formation of acid-insoluble salts caused by rapid volatilization are avoided; and then high-temperature firing is carried out so that sufficient andcomplete ashing is guaranteed, meanwhile, toxic substance dioxin caused by incomplete combustion of materials in the electronic waste is avoided, and the operation safety is guaranteed. The method issuitable for detecting the copper in the electronic waste copper material, ensures that the sample can be completely decomposed, and solves the problems of poor repeatability and accuracy of the analysis result of the existing detection technology and method. The method has the advantages of good repeatability, high accuracy, strong practicability, low cost, high efficiency and the like, the analysis result is more objective and real, and the method is suitable for factory laboratories.

Description

technical field [0001] The invention relates to a method for detecting copper in electronic waste, in particular to a method for detecting copper content based on the iodometric method after ashing-acid-dissolving samples, and belongs to the technical fields of chemistry and metallurgy. Background technique [0002] Electronic waste (waste cables, waste circuit boards, damaged electrical components, etc.) is rich in a variety of valuable metals. Some studies have pointed out that the composition of electronic waste is 30% plastic, 30% refractory oxide and 40% metal, of which copper content About 20% is a renewable resource. In recent years, with the increasing awareness of environmental protection, the recycling of electronic waste has developed rapidly, and such materials have entered some copper smelters in the form of copper-containing raw materials. However, the composition of e-waste is relatively complex, and due to the limitation of detection technology, the normal a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 田强坤李超施艳艳吴怡李娟杨琳娟江玉花李义娄宗文李文莎肖太菊张春蓉
Owner CHUXIONG DIANZHONG NON FERROUS METALS LLC
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