Detection method for waste circuit board

Abstract

The invention relates to the field of PCB, and particularly discloses a detection method for a waste circuit board. The method comprises the following steps of (1) uniformly paving the batch of wastecircuit boards on a belt of a primary conveyor, and performing primary sampling on the belt by using a movable sampling vehicle so as to obtain a primary sample; (2) carrying out a first crashing treatment on the primary sample to obtain a first crushed sample; (3) uniformly paving the first crushed sample on the belt of a secondary conveyor, and performing secondary sampling on the first crushedsample on the belt by using the movable sampling vehicle so as to obtain a secondary sample; (4) carrying out a second crashing treatment on the secondary sample to obtain a second crashed sample; (5)carrying out three-stage sampling on the second crushed sample so as to obtain a three-stage sample; (6) carrying out dilute nitric acid wet method pulvering treatment on the three-stage sample so asto obtain a pulverized sample; (7) and carrying out a drying treatment on the pulverized sample so as to obtain a dried pulverized sample.

Description

technical field [0001] The invention relates to the field of PCBs, in particular to a method for detecting waste circuit boards. Background technique [0002] With the rapid development of the economy, the speed of the generation of electronic waste in my country is very alarming. According to a report released by the United Nations Environment Program in 2010, my country has become the second largest producer of e-waste in the world, producing more than 2.3 million tons of e-waste every year, second only to the 3 million tons of the United States; by 2020, my country's waste computers will be Compared with 2007, it will double to quadruple, and discarded mobile phones will increase by 7 times. Electronic waste is a "second resource" to be developed. It is called "urban mine" because it contains a large amount of metals. The metal grade is much higher than that in ordinary minerals, especially when it is disassembled from electronic and electrical products. Waste circuit bo...

AI Technical Summary

Problems solved by technology

How to obtain a representative batch of waste circuit boards and prepare samples that can be tested and analyzed is a bottleneck technology that must be solved for the standardized development of waste circuit board processing enterprises. There are no public reports from various literatures and manufacturers, which also causes The current status of waste circuit board treatment is the reality that small enterprises without environmental protection measures are thriving, and large green and environmental protection enterprises are sluggish.

Without solving the problem of the detection method of waste circuit boards, it is difficult to accurately determine the amount of valuable metals in waste circuit boards. This rough treatment method without environmental protection measures will cause further deterioration of the environment and a huge waste of resources

[0005] Therefore, the existing waste circuit board sampling technology needs to be further studied