Abstract: A method for producing a weak resistance injection element for introducing ases into molten metals.The injection element includes an assembly of at least two high density refractory components. At least the upper high density refractory component is made by isostatic pressing of ceramic powders followed by a double heat treating process which are selected according to the liquid metal to be melted/refined in the metallurgical vessel where the injection element is going to operate.

Abstract: This invention relates to a method and a device to produce a coating from metal powder metallurgically bonded to a metallic part, said metal powder being compacted over the surface of said metallic part to form the coating using cold isostatic pressing, then coupling an open metallic container to the coating leaving a space between said open metallic container and said coating, completely filling the space between the metallic container and the coating with a ceramic material and sealing, so that the ceramic material exerts pressure due to the thermal expansion over the coating during the heating in a sintering furnace in order to get a metallurgical bond between the metallic part and the coating and simultaneously sintering the coating to achieve the desirable the desirable thickness and the required properties.

Abstract: A process for the desulphurization of residuals of petroleum distillation in the form of coke particles having an initial sulphur content greater than about 5% by weight. Desulphurization is effected by means of a continuous electrothermal process based on a plurality of sequentially connected fluidized beds into which the coke particles are successively introduced. The necessary heat generation to desulphurize the coke particles is obtained by using the coke particles as an electrical resistance in each fluidized bed by providing a pair of electrodes that extend into the fluidized coke particles and passing an electrical current through the electrodes and through the fluidized coke particles. A last fluidized bed without electrodes is provided for cooling the desulphurized coke particles after the sulphur level has been reduced to less than about 1% by weight.