Preparation method of aluminum-silicon-iron alloy
A technology of ferroalloy and aluminum-silicon, which is applied in the field of preparation of aluminum-silicon-ferroalloy, can solve the problems of energy waste, high burnout rate, and high cost, and achieve the effects of reducing anode consumption, protecting anodic oxidation, and reducing heat loss
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[0023] In view of the reuse of aluminum-silicon overhaul slag in the prior art, this application provides a method for preparing an aluminum-silicon alloy, which uses an electrolytic method to prepare an aluminum-silicon-iron alloy with high purity, low impurity content, and high chemical stability On the other hand, using the electrolytic cell in the aluminum electrolysis plant as the electrolytic reaction cell does not require excessive capital investment in equipment, and the electrolysis technology is mature, which solves the pollution of fluoride and cyanide in the solid waste of overhaul slag in the aluminum electrolysis industry The problem is that the harmless treatment, reduction treatment and resource treatment of the waste lining of the aluminum electrolytic cell have been realized, and the obtained Al-Si-Fe alloy is a high-value product, which has good feasibility and economy. Specifically, the preparation method of the Al-Si-Fe alloy provided by the present applica...
Embodiment 1
[0042] Take the aluminum-silicon solid waste in the lining of the waste tank and grind it to obtain a solid waste crushed material with a particle size of ≤0.15mm. The ground crushed material is mixed with alumina in a certain proportion, and at the same time, waste cathode steel rods (Fe content of more than 99%), during electrolysis, the waste cathode steel rods are directly thrown into the electrolytic cell to obtain a mixture; the content of aluminum in the pulverized material is 16.2wt%, the content of iron is 3.56wt%, and the content of silicon is 12.41 wt%; the weight percentage of aluminum and silicon solid waste in the mixture is 5wt%, and the quality of the steel rod is 5wt% of the mixture quality;
[0043] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.028V, the electrolysis temperature is 915°C, and the current efficiency is 92.3%. The specific electrolyte is: aluminum fluoride 7.023wt%, magnesium...
Embodiment 2
[0045] Take the aluminum-silicon solid waste in the lining of the waste tank and grind it to obtain solid waste crushed material with a particle size of ≤0.15mm. Mix the ground crushed material with alumina in a certain proportion, and add the waste cathode steel rod (Fe content more than 99%) to obtain the mixture; the content of aluminum in the pulverized material is 16.2wt%, the content of iron is 3.56wt%, and the content of Si is 12.41wt%. 20wt%, the mass percentage of the waste cathode steel rod is 5wt%, and the waste cathode steel rod is directly thrown into the electrolytic cell during electrolysis;
[0046] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.07V, the electrolysis temperature is 931°C, and the current efficiency is 91.2%. The specific electrolyte is: aluminum fluoride 6.524wt%, magnesium fluoride 2.153wt% , lithium fluoride 2.212wt%, calcium fluoride 3.425wt%, potassium fluoride 1.875wt%, ...
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