Preparation method of rare earth aluminum titanium boron grain refiner
A grain refiner, rare earth aluminum technology, applied in the field of aluminum alloy application, can solve the problems of loss of refinement ability, easy aggregation of particles, high cost, etc., achieve long duration of refinement, obvious refinement effect, low energy consumption low cost effect
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preparation example Construction
[0027] The preparation method of the rare earth aluminum titanium boron grain refiner comprises the following steps:
[0028] Step 1: Weighing the raw materials, which include: aluminum ingots, potassium fluotitanate, potassium fluoborate, sodium chloride, potassium chloride, cryolite, and rare earth oxides or rare earth fluorides and calcium metal;
[0029] Step 2: After the raw material is heated up to melt the aluminum ingot, the melt temperature is controlled at 750-850°C, and a mixed salt of potassium fluotitanate and potassium fluoborate is added for reaction;
[0030] Raw materials are heated and melted using induction furnaces, resistance furnaces, gas furnaces or electric arc furnaces. After the aluminum ingot is melted and reaches the temperature, the mixed salt of potassium fluoroborate and potassium fluorotitanate mixed in proportion and wrapped in aluminum foil is added in batches for reaction. Stirring time is 10-150min.
[0031] Step 3: Stir until the melt is ...
Embodiment 1
[0037] (1) Weigh aluminum ingots, potassium fluoroborate, potassium fluorotitanate, cryolite, sodium chloride, potassium chloride, and lanthanum oxide as required;
[0038] (2) After the industrial pure aluminum is melted in the induction furnace, the mixed salt of potassium fluoroborate and potassium fluorotitanate mixed according to the regulations is added in batches several times for reaction, and the temperature of the melt is controlled at 800 °C after heating and melting;
[0039] (3) Stir until the melt reacts completely and remove the slag, the stirring time is 60min;
[0040] (4), adding the mixed salt of cryolite, sodium chloride, potassium chloride and lanthanum oxide mixed according to regulations several times in batches to the melt after slag removal, and the temperature is controlled at 1000° C.;
[0041] (5) Refining after stirring until the melt reaction is complete, the stirring time is 60min, and argon gas is used for refining, and the refining time is 10min;...
Embodiment 2
[0045] (1) Weigh aluminum ingots, potassium fluoroborate, potassium fluorotitanate, cryolite, sodium chloride, potassium chloride, and cerium oxide as required;
[0046] (2) After the industrial pure aluminum is melted in the induction furnace, the mixed salt of potassium fluoroborate and potassium fluorotitanate mixed according to the regulations is added in batches several times for reaction, and the temperature of the melt is controlled at 800 °C after heating and melting;
[0047] (3) Stir until the melt reacts completely and remove the slag, the stirring time is 60min;
[0048] (4), adding the mixed salt of cryolite, sodium chloride, potassium chloride and lanthanum oxide mixed according to regulations several times in batches to the melt after slag removal, and the temperature is controlled at 1000° C.;
[0049] (5) Refining after stirring until the melt reaction is complete, the stirring time is 60min, and argon gas is used for refining, and the refining time is 10min; ...
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