RU94037492A - Method and plant for electron beam melting of titanium sponge - Google Patents

Abstract

FIELD: special electrometallurgy, namely production of ingots and slabs of technical titanium having merchant purity degree in electron-beam plants with intermediate tank and with use of titanium sponge as initial charge. SUBSTANCE: method comprises steps of making consumable titanium container, filling it by titanium sponge, feeding container had been filled to zone of action of electron beam, heating and fusing its end over intermediate tank, refining metal in intermediate tank upon continuous heating power, draining melt metal to crystallizer for forming ingot. Novelty is feed of consumable container with linear motion speed equal to linear speed of distribution of front of melting temperature or less than that valve in order to provide degassing and evaporation of magnesium or sodium chlorides at sustaining value of reduced melting power for metal refining in intermediate tank and for ingot forming in crystallizer over range 3-10 kWt.h/kg.square meter and 0.5-2.5 kWt.h/kg.square meter respectively. Plant for performing the method includes electron-beam guns with deflection systems as heating sources, consumable container, intermediate tank and crystallizer. Novelty is using as heating sources gas discharge electron beam guns level of working pressure into which is higher than pressure in melting chamber, particularly high-voltage glow discharge electron beam guns upon ratio of distance between deflection systems of guns and intermediate tank to its surface area no less than 3 l/m. EFFECT: increased metal yielding to ingot, enhanced efficiency of plant upon lowered specific energy consumption, high quality of metal in ingots, stable manufacturing process.

Claims (1)

The invention relates to special electrometallurgy and may find application in the preparation of commercial-grade ingots and slabs of commercial grade titanium in electron beam installations with an intermediate capacity and using sponge titanium as the initial charge. The method includes the manufacture of a consumable titanium container, filling it with sponge titanium, feeding the filled consumable container into the zone of electron rays, heating and melting its end above the intermediate tank, refining the metal in the intermediate tank with constant heating power, draining the liquid metal into the mold and forming it ingot. The novelty of the method lies in the fact that the supply of the consumable container is carried out with a linear velocity of movement equal to or lower than the linear velocity of propagation of the front of the melting temperature, which provides degassing and evaporation of magnesium or sodium chlorides, while maintaining the magnitude of the reduced melting energy for refining the metal in an intermediate tank and the formation of the ingot in the mold in the range of 3-10 and 0.5-2.5 kW h / kg m ^2, respectively. The installation for implementing the method comprises, as heat sources, electron guns with deflecting systems, a consumable container, an intermediate tank and a mold. New in the installation is that gas-discharge electron guns are installed as heating sources, the level of the working pressure of which is higher than the pressure in the melting chamber, in particular, electron guns of a high-voltage glow discharge, and the ratio of the distance between the deflecting systems of the guns and the intermediate capacity to its area is not less than 3 m ^-1 . The invention improves the yield of metal in the ingot and the performance of the installation while reducing the specific energy consumption, ensuring high quality metal in the ingot and the stability of the process.