| 简介 |
FIELD : metallurgy.SUBSTANCE : invention relates to metallurgy. Proposed process comprises charge preparation at batching and mixing of zirconium-bearing oxide material. The latter includes zirconium dioxide, mix of the latter with refractory metal oxides, zirconium-bearing slag from production of zirconium ferrosilicon or zirconium ferroaluminium, with aluminium and fluxing additive. The latter can be the mix of alkali-earth metals and their fluorides, or mix of alkali-earth metal oxides and their fluorides, or mix of alkali-earth metals, their oxides and fluorides. Here, the ratio between zirconium dioxide, aluminium and alkali-earth metal and/or alkali-earth metal oxide, alkali-earth metal fluoride makes 1 : (0.4-1.4) : (0.18-0.6) : (0.07-0.2) by weight. Then, said charge is subjected to reducing melting in air or neutral atmosphere at 1450-1750°C in resistance, induction or arc furnaces. Now, aluminium-zirconium alloy is separated from slag.EFFECT : higher quality of produced alloy.3 cl, 4 ex, 1 tbl |
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