A device for igniting oxygen thermal lances or melting lances may include: a cartridge configured to couple to an operating end of a thermal or melting lance, configured to be supplied with oxygen to ignite the lance, and containing high calorific value material; and an induction heater assembly configured to heat the cartridge, such that the high calorific value material is burnt before supplying the oxygen into the cartridge to ignite the lance. The cartridge may include: a first end configured to couple to an operating end of a lance; and a second end having one or more axial holes for passing oxygen into the cartridge. An assembly for igniting oxygen thermal lances or melting lances may include: the device; the lance coupled to an end of the cartridge; a robotic arm configured to handle the lance; and a supply of oxygen in fluid communication with the lance and cartridge.