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SOLAR GRADE SILICON The production of solar cells from silicon presents major challenges in terms of the purity of the silicon. The conventional method for purifying the raw silicon is the Siemens Process, which was originally developed for microelectronics. Companies and research groups worldwide are working on less laborious, and therefore more cost-effective, production methods that are specifically tailored to the requirements of solar technology. One promising possibility is the production of solar grade silicon from metallurgical silicon, which is heated and purified in special furnaces in a process involving several stages. In this context, the production facility in Ruse is a godsend for Solarvalue AG: the arc furnaces, induction furnaces and smelting and casting plants of the former calcium carbide production facility can be used for silicon production. The complete infrastructure, such as electricity and water supply, road and rail links, is already in place. Even the previous personnel, including managers and a workforce that is familiar with the equipment, are available to operate the plant as a silicon production facility. Our blog features regular updates on the progress of the conversion work at the factory in Ruse. ![]() ![]() ![]() ![]() ![]() ![]() ![]() 01_ 02_ 03_ 04_ 05_ ![]() ![]() ![]() ![]() 02_SOLAR SILICON |