Method for preparing aluminum-yttrium-rare earth intermediate alloy by aluminothermic reduction method

• Main Authors: ZHANG QI, RUAN QILIN, HU ZHENGUANG, WU JIANQIANG, GAN PEIYUAN, TANG HONGQUN, YIN ZHIXIN, ZHOU JIACHANG, WEI DESHI
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2021
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a method for preparing an aluminum-yttrium-rare earth intermediate alloy by an aluminothermic reduction method. The method comprises the following steps of calculating and weighing pure aluminum ingots, alkali metal halide, cryolite and yttrium fluoride according to the components of the aluminum-yttrium-rare earth intermediate alloy; heating and melting a pure aluminum ingot, mixing molten salt according to a ratio, adding the molten salt into molten aluminum, and carrying out heat preservation reduction for 30-120 minutes in a temperature range of 950-1100 DEG C; and after the reduction reaction is completed, carrying out casting and cooling, and obtaining the aluminum-yttrium-rare earth intermediate alloy. The method for preparing the aluminum-yttrium-rare earth intermediate alloy has the following advantages that the recovery rate of yttrium is high, the production cost is low, the requirement for needed equipment is low, operation is easy, the reduction reaction temperature is lo