Superconducting magnets made of high-T_c superconductors are promising for industrial applications. It is well known that REBa₂Cu₃O_7-x superconductors prepared by melt processes have a high critical current density, J_c, at 77 K and high magnetic fields. The materials are very promising for high magnetic field applications as a superconducting permanent/bulk magnet with liquid-nitrogen refrigeration. Light rare-earth (LRE) BaCuO bulks, compared with REBaCuO bulks, exhibit a larger J_c in high magnetic fields and a much improved irreversibility field, H_irr, at 77 K. In this study, we discuss technical issues of a high-T_c superconducting bulk magnet, namely the aspects of the melt processing for bulk superconductors, their characteristic superconducting properties and mechanical properties, and trapped field properties of a superconducting bulk magnet. One of the possible applications is a superconducting bulk magnet for the magnetically levitated (Maglev) train in the future.