The amount of solid waste generated by all segments of society has increased in past decades. Annually, in Brazil, 96,
ResumoA quantidade de resíduos sólidos gerados por todos os segmentos da sociedade tem aumentado nas últimas décadas. Anualmente, no Brasil, são gerados 96 mil toneladas de sucata eletrônica proveniente de computadores.O descarte incorreto desses resíduos gera danos ao meio ambiente, bem como perda de materiais que poderiam ser reaproveitados e/ou reciclados, diminuindo, assim a extração de matérias-primas para a produção de novos materiais.As placas de circuito impresso (PCI) correspondem a, aproximadamente, 30% da sucata eletrônica gerada. Cabe ressaltar que realizar a reciclagem dessa sucata é um processo complexo, porém de extrema importância para a recuperação de metais de grande valor econômico. Os processos industriais, para a recuperação de metais provenientes de PCI, são baseados, em pirometalurgia e hidrometalugia. Em ambos os processos, é possível fazer um pré-tratamento, que consiste no uso de processos mecânicos.Desta forma, nesse trabalho, foi realizada a concentração da fração metálica das PCI através do uso de um concentrador Mozley. Os resultados mostram que é possível obter quantidades significativas de metais como cobre (concentração de 85%), estanho (95%) e prata (98%) nas frações de interesse. Palavras-chave: Resíduos eletroeletrônicos, metais, concentração gravimétrica, sucata de placas de circuito Impresso.
The unceasing demand for electronic equipment has led to numerous problems, such as environmental damage and raw material shortages. The adoption of circular production chains and the precepts of the circular economy when designing electronic equipment could minimize these problems by fostering the reuse of resources without loss of quality or value. The scientific literature has many studies on the importance of circular production, but there are no data to demonstrate whether the scientific information produced on the circular economy and circular production is being taken up by industry. This study analyzes whether patent applications for inventions applicable to the production of electronic equipment meet the precepts of the circular economy. To this end, a study of patent documents was conducted. A total of 3638 documents were retrieved. Their analysis revealed that the technologies developed by the leading patent applicants and manufacturers are mainly from the first link in the production chain, materials, and components. The solutions proposed tend to be geared toward equipment efficiency and reduced energy consumption, which may indirectly increase the equipment’s useful life and save energy. Despite the existence of laws and research highlighting the importance of feeding used materials back into the production process, the developers of electronic equipment have not yet turned their attention to the recycling and retrieval of materials for their use as inputs for new components.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.