United Nations defined in 2015 seventeen goals for the sustainable development, which included several that are closely related to the industries of materials: affordable and clean energy, industry innovation and infrastructure and responsible consumption and production. This way, solar energy is a suitable technology to accomplish these goals in the field of materials in general, and in the field of ceramics, in particular. The main reason is that when adequately concentrated, solar energy is a good manner of reaching the high temperatures required by the ceramics industry. On the other hand, aluminium industry generates several wastes that are suitable for being recycled in other industries. In this manuscript, waste alumina fines from the Bayer process in the aluminium industry are proposed to be recycled into MgAl2O4 spinel with the competition of solar energy. Therefore, this research describes a novel process for the obtaining of this magnesium aluminate spinel using a renewable energy source as solar energy and employing the waste product Bayer process electrofilter fines (BPEF) as source of alumina. The process consisted in the application of direct normal irradiation values above 950 W/m2 to 1:1 molar ratio of industrial MgO and BPEF (that mainly comprises Al2O3) mixtures for very short periods of time (5 minutes) in the 1.5 meters in diameter parabolic concentrator of Odeillo (Font Roméu-Odeillo-Via, France). The synthesized material exhibited MgAl2O4 spinel with well crystallization and without traces of the original raw materials. Therefore, concentrated solar energy emerges as an alternative to produce MgAl2O4 spinel, with numerous potential applications, resulted from the chemical, thermal, dielectric, mechanical and optical properties, including the fact of being an important raw material for the ceramic industry. The novel proposed process is very short in time and offers a sustainable alternative to produce this spinel material using metallurgical industry wastes and solar energy.