Method and device for producing direct reduced metal

A system for producing direct reduced metal material, comprising:

• a second furnace and a first furnace, which first furnace has a closed furnace space, in turn being arranged to receive charged metal material to be reduced;
• an atmosphere evacuation means arranged to evacuate an existing atmosphere from the furnace space so as to achieve an underpressure inside the furnace space;
• a heat and hydrogen provision means arranged to provide heat and first hydrogen gas to the furnace space;
• a control device arranged to, in a main heating step, control the heat and hydrogen provision means so that heated first hydrogen gas heats the charged metal material to a temperature high enough so that metal oxides present in the metal material are reduced, in turn causing water vapour to be formed;
• and
• a cooling and collecting means arranged below the charged metal material, arranged to condense and collect the water vapour,
• wherein the control device is arranged to control the heat and hydrogen provision means to provide said first hydrogen gas without recirculation of the first hydrogen gas, and wherein the system further comprises a charged material cooling mechanism, arranged to subsequently perform a cooling of the charged material, whereby the charged material cooling mechanism is arranged to allow thermal energy from the charged material to be absorbed by said first hydrogen gas, and whereby the charged material cooling mechanism is arranged to allow thermal energy, by heat exchange, to be transferred from said first hydrogen gas to second hydrogen gas to be used in a second furnace for producing direct reduced metal material.