Those cell phones, computers and small devices that are gathering dust in a drawer and ending up in a landfill contain valuable minerals such as copper, silver and platinum inside, which also end up there. Every year in the Spanish state almost 930,000 tons of Waste Electrical and Electronic Equipment (WEEE) are thrown away, which makes Spain the sixth state on the continent in generation of this type of waste. according to data from the UN E-waste Monitor by 2024.
Of these, less than half is documented and recycled waste. In a context in which rare earths and critical minerals are a strategic resource of which Europe wants to achieve sovereignty, Spain has taken a step forward with a CSIC pilot plant pioneer in the old continent: a furnace capable of melting that electronic waste to extract valuable metals from it.
The pioneer oven. A few days ago the National Center for Metallurgical Research of the CSIC inaugurated in Madrid the first European pilot plant capable of recovering critical metals from electronic waste using a submerged lance furnace, which exceeds 1,200 °C to melt electronic waste. The milestone was formalized with the first experimental casting of metals obtained directly from electronic waste and obtained materials such as copper, gold, silver and platinum in a clean and efficient way.
In conventional furnaces, the heat comes from the outside, but in this case a metal lance is introduced that injects oxygen and fuel directly into the molten bath, which generates intense turbulence that mixes and homogenizes the material, accelerates chemical reactions and improves energy efficiency.
Why is it important. Because every year Europe generates millions of tons of electronic waste containing copper, gold, silver, platinum and strategic minerals necessary for the energy transition and digitalization. A part of them is not recovered: it is lost or used outside the continent. The facility in question is an advance in advanced pyrometallurgy and the management of waste from electrical and electronic equipment that shows that it is possible to treat this waste in Europe, thus preventing the associated economic value from leaving the continent, which allows the raw materials to be reincorporated into the European production chain itself.
In addition, it connects directly with the Critical Raw Materials Law of the European Union, which fixed that at least 25% of the critical raw materials consumed by the EU by 2030 must come from recycling. The EU is currently heavily dependent on imports of critical raw materials, often from a single supplier, which poses a serious geopolitical risk in the form of dependence on strategic sectors such as renewable energy, digitalisation and defence.
Context. The generation of WEEE is out of control and breaking records. According to the UN international waste observatoryin 2022 the world generated 62 million tons, 82% more than in 2010, but less than in 2030, when the estimated figure is 82 million tons. Europe takes the cake: in 2022 it was the region with the highest volume of WEEE per inhabitant with 17.6 kg per person, of which only 7.3 kg were recovered.
But that garbage is money: the UN E-Waste quantifies the economic value of those 62 million tons at 91 billion dollars a year. If of this global total of WEEE, 13 million tons of garbage per year They belong to Europe. Calculated proportionally, it would be equivalent to losing about 19,000 million dollars annually due to poorly managing these materials (about 16,340 million euros at the exchange rate). While we search for deposits and accelerate their exploitation in a sector dominated by China, we have a deposit pending to be exploited: the “urban” mine with WEEE recycling.
The situation regarding WEEE in Europe in 2022. UN E-Waste 2024
How it works. He submerged lance furnace is based on the ISASMELT processso that the raw materials only need to be pre-mixed, there is no need for fine grinding or drying, which simplifies the feeding with materials as heterogeneous as WEEE. The separation of materials is based on the difference in densities: once the waste is melted, copper and precious metals such as gold or silver tend to sink to the bottom of the reactor due to their greater density, while the slag (which is non-metallic) floats on the surface, which makes extraction simple.
The project has been possible thanks to a public-private collaboration between CENIM-CSIC and two companies, the European copper smelting giant Atlantic Copper and the metallurgical company Glencore Technology.
Yes, but. The CENIM facility is a pilot plant, not an industrial plant, and this leap in pyrometallurgy is not exactly small: engineering issues must be resolved such as the management of the gases emitted in the process or the useful life of the furnace’s refractory materials, among others. And this project may find its political framework in the Critical Raw Materials Act, but this It’s more of a statement of intent. than anything else: it does not have a roadmap nor has it made available new funds to accelerate these initiatives.
However, the biggest problem is not in the oven, but in recycling or the absence of this: 46% of WEEE and the critical materials it contains are lost before reaching any recycling facility, simply because collection is poor. There is little point in developing highly efficient recovery technology if electronic waste ends up mixed with organic waste in the brown container. Or if it is exported outside of Europe. The real bottleneck remains collection.
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