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In the Sumitomo Electric Group, Sumitomo Electric Hard Metal mainly produces and sells superhard tools with tungsten, cobalt and other raw materials. Sumitomo Electric Hard Metal has used sales channels and is committed to recycling and recycling of used tools. The company uses the "zinc treatment method". This method recovers tungsten carbide and cobalt in the form of powder from waste tools, but the use of recycled raw materials is the same as that of superhard tools, so the use is limited.
In addition to the zinc treatment method, the recycling technology of unrestricted ammonium paratungstate (APT) has also been put into practical use. However, since a large amount of chemicals are used in a plurality of steps, there is a problem that the environmental load is large and the energy consumption is high. The goal of Sumitomo Electric is to develop new processes that can significantly reduce environmental loads and energy consumption when recycling APT. In addition, the name of this commissioned research business is "Rational Use Rationalization, Development of Rare Metals Efficient Recovery System", which is implemented by the Oil and Gas Metal Mineral Resources Agency (JOGMEC). 
According to technical online news, Sumitomo Electric Co., Ltd. is accelerating the development of technologies that efficiently recover and reuse tungsten from used superhard tools. Sumitomo Electric announced on July 6, 2007 that the research project submitted by the company has been adopted by the commissioned research business of the Ministry of Economy, Trade and Industry in 2007. The development goal of this project is to separate tungsten from unconstrained use from waste tools in a low environmental load and low energy consumption.