Abstract: A method of operating an ironmaking or steelmaking plant with low CO2-emissions is provided. Hydrogen and oxygen are generated by water decomposition and at least part of the generated hydrogen is injected as a reducing gas into one or more ironmaking furnaces with off-gas decarbonation and reinjection into the furnaces of at least a significant part of the decarbonated off-gas and at least part of the generated oxygen is injected as an oxidizing gas in the one or more ironmaking.

Abstract: A method of operating an ironmaking or steelmaking plant with low CO2-emissions is provided. Hydrogen and oxygen are generated by water decomposition and at least part of the generated hydrogen is injected as a reducing gas into one or more ironmaking furnaces with off-gas decarbonation and reinjection into the furnaces of at least a significant part of the decarbonated off-gas and at least part of the generated oxygen is injected as an oxidizing gas in the one or more ironmaking.

Abstract: Blast furnace installation having top gas recycling and process for operating same, in which the oxygen concentration of the oxidizing gas injected into the blast furnace is regulated as a function of the flow rate of the recycled top gas.

Abstract: Blast furnace installation having top gas recycling and process for operating same, in which the oxygen concentration of the oxidizing gas injected into the blast furnace is regulated as a function of the flow rate of the recycled top gas

Abstract: Methods and apparatus are presented which allow efficient environmental testing of components such as printed circuit boards, integrated circuits, sub-systems and other components. In one method of the invention, a component can be placed into a chamber having an internal space filled with a gaseous atmosphere. The component is indirectly cooled by smartly positioning one or more cooling coils near the component to be tested, and the cooling coils are fed with a cryogenic fluid from a source of cryogenic fluid. The warm cryogenic fluid is recycled by one of two means: a thermosiphon conduit loop, and a storage and compression facility for reusing the warm cryogenic fluid. The internal space is preferably filled with a dry gas.

Abstract: Methods and apparatus are presented which allow efficient environmental testing of components such as printed circuit boards, integrated circuits, sub-systems and other components. In one method of the invention, a component can be placed into a chamber having an internal space filled with a gaseous atmosphere. The component is indirectly cooled by smartly positioning one or more cooling coils near the component to be tested, and the cooling coils are fed with a cryogenic fluid from a source of cryogenic fluid. The warm cryogenic fluid is recycled by one of two means: a thermosiphon conduit loop, and a storage and compression facility for reusing the warm cryogenic fluid. The internal space is preferably filled with a dry gas.

Abstract: The invention relates to a tundish for the continuous casting of steel having a housing for the injection of gas with a feed tube for gas, the injection housing having an upper wall which is permeable to the gas. Periodically, the injection housing is completely replaced by removing the sealing grout.