Abstract: Method for producing direct reduced metal material (142), comprising the steps: a) charging material into a closed furnace space (120); b) filling the furnace space with heated inert gas, heating the material; c) providing a reducing gas; d) providing heat so that metal oxides present in the material are reduced, in turn causing water vapour to be formed; e) condensing and collecting the water vapour a condenser (160); and f) evacuating remaining reducing gas from the furnace space. The method is characterised in that the reducing gas has a lower density than the inert gas at the same pressure, and in that, in step c), the reducing gas is provided while the inert gas is still present in the furnace space, whereby the provided reducing gas as a result pushes the inert gas downwards, until the material (is entirely contained in reducing gas. The invention also relates to a system.

Abstract: A method for producing direct reduced metal material includes charging metal material to be reduced into a furnace space; evacuating an existing atmosphere from the furnace space so as to achieve an underpressure inside the furnace space; providing, in a main heating step, heat and hydrogen gas to the furnace space, so that heated 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 vapor to be formed; and condensing and collecting the water vapor in a condenser below the charged metal material. The providing of heat and hydrogen gas, and the condensing and collecting, are performed at least until a hydrogen atmosphere overpressure has been reached inside the furnace space, and so that no hydrogen gas is evacuated from the furnace space until the overpressure has been reached.

Abstract: A method for producing direct reduced metal material includes charging metal material into a first furnace space of a first furnace; evacuating an atmosphere from the first furnace space to achieve an underpressure inside the first furnace space; providing heat and first hydrogen gas without recirculation to the first furnace space, so that heated first hydrogen gas heats the charged metal material so that metal oxides present in the metal material are reduced, causing water vapor to be formed; and condensing and collecting the water vapor in a condenser. A subsequently performed charged material cooling step is carried out in which thermal energy from the charged material is absorbed by the first hydrogen gas, and in which thermal energy, by heat exchange, is transferred from the first hydrogen gas to second hydrogen gas to be used in a second furnace for producing direct reduced metal material.

Abstract: A method for producing direct reduced metal material includes charging metal material to be reduced into a furnace space; evacuating an existing atmosphere from the furnace space so as to achieve an underpressure inside the furnace space; providing, in a main heating step, heat and hydrogen gas to the furnace space, so that heated 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 vapor to be formed; condensing and collecting the water vapor in a condenser below the charged metal material. The hydrogen gas is provided without recirculation of the hydrogen gas. The also includes a subsequently performed step of removing the reduced metal material from the furnace space, and storing and/or transporting the reduced metal material under an inert atmosphere.

Abstract: Method for producing direct reduced metal material (106) in a continuous process, wherein hydrogen gas and inert gas is circulated in respective closed-loop first and second gas circuits via different respective gas connection stations (130,140120-122,150-151), comprising for individual mobile furnaces (101): a) charging metal material (106) into the furnace; b) moving and connecting the furnace to an inert gas connection station; c) providing heated inert gas to the furnace; d) disconnecting the furnace; e) moving and connecting the furnace to a hydrogen gas connection station; f) providing heated hydrogen gas to the furnace; g) disconnecting the furnace; h) moving and connecting the furnace to an inert gas connection station; i) providing cooled inert gas to the furnace; j) disconnecting the furnace; and k) discharging the metal material. The invention also relates to a system.

Abstract: Method for producing direct reduced metal material, comprising the steps: a) charging metal material to be reduced into a furnace space (120); b) evacuating an existing atmosphere from the furnace space (120) so as to achieve an underpressure inside the furnace space (120); c) providing, in a main heating step, heat and hydrogen gas to the furnace space (120), so that heated 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 d) condensing and collecting the water vapour formed in step c in a condenser (160) below the charged metal material, characterised in that steps c and d are performed at least until a hydrogen atmosphere overpressure has been reached inside the furnace space (120), and in that no hydrogen gas is evacuated from the furnace space (120) until said overpressure has been reached. The invention also relates to a system.

Abstract: Method for producing direct reduced metal material, comprising the steps: a) charging metal material to be reduced into a first furnace space (120) of a first furnace (220); b) evacuating an existing atmosphere from the first furnace space (120) so as to achieve an underpressure; c) providing, in a main heating step, heat and first hydrogen gas to the first furnace space (120), so that metal oxides present in the metal material are reduced, in turn causing water vapour to be formed; and d) condensing and collecting the water vapour formed in step c in a condenser (160) below the charged metal material.

Abstract: Method for producing direct reduced metal material, comprising the steps: a) charging metal material to be reduced into a furnace space (120); b) evacuating an existing atmosphere from the furnace space (120) so as to achieve an underpressure inside the furnace space (120); c) providing, in a main heating step, heat and hydrogen gas to the furnace space (120), so that heated 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 d) condensing and collecting the water vapour formed in step c in a condenser (160) below the charged metal material; The invention is characterised in that said hydrogen gas in step c is provided without recirculation of the hydrogen gas, and in that the method further comprises the subse 15 quently performed step of removing the reduced metal material from the furnace space (120), and storing and/or transporting the reduced metal material under an inert

Abstract: Self-adjustable, self-lubricating joint or sliding bearing unit incorporating an inner ring having an outer contour, which together with an outer part designed in a complementary manner and having a main axial direction is designed to be able to permit angular deviations between the axis direction of the inner ring and the axis direction of the outer part, and where the outer part is manufactured from a porous, preferably sintered material that is compressed about the inner part, and having an ability of bleeding oil during operation of the joint or bearing unit for lubrication of the contact surfaces facing each other, whereby the inner part is provided with irregularities in the form of grooves and/or chutes, indentations and/or bridges, arranged to eliminate between the contact surfaces and uneven pressure distribution in the oil caused by a laminar oil flow.