Apparatus and method for [...] and/or microalloy contains of metal melts

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A application-oriented Method [...] device for and/or to detach the microalloy contains of metal melts together with the problem in the technical task load additives with losses on ignitiona alloy of highly oxidation-sensitive by a new injection lance in the economics of the unacceptable. A changeable treatment central container[...], installed in an injection lance, ensures that the treatment agent by means of a prestressed compression spring in a pulse-like manner into the melt under reach inert gas flow, where at its outlet itself above the previous state of the art with a temporarily synchronous going out feature of the protection against immediate oxidation of the treatment agent yields accompanying deoxidation operation. With the patent-relevant device and the associated method can even rare earths including yttrium in melting of iron base alloys are introduced under the influence of atmospheric ambient air causing minimum degree of burn-up and/or slag at melting treatments on the melt.