A method for preparing lead-calcium master alloy by molten salt primary battery method
A lead-calcium master alloy and galvanic battery technology, applied in molten electrolyte fuel cells, battery electrodes, circuits, etc., can solve the problems of uneven mixing of lead-calcium master alloys and the generation of harmful gases, and achieve fast conduction rate and energy saving. , the effect of reducing economic losses
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Embodiment 1
[0050] Put a dry and clean graphite crucible in a lead melting furnace, add 1t of lead into the crucible, and put it into a stirring device; raise the temperature to 350-400°C, turn on the mixer, stir for 3-5 minutes, then remove the slag and remove surface impurities.
[0051] Add 10-50kg of dry-dried halide salt to the crucible within 1-30 minutes. The halide salt is a mixed salt of NaCl and KCl. The molar ratio of NaCl and KCl is 0.55:0.45. Close the lid and raise the temperature to 600~700℃. Wait until the temperature stabilizes and the salt in the crucible melts and acts as an electrolyte. 0.6-1.8kg of calcium metal is placed in a stainless steel basket and placed in molten salt as the negative electrode of the primary battery, and the lead liquid is the positive electrode.
[0052] A constant current discharge is carried out between the positive and negative electrodes, and the metal calcium negative electrode dissolves to generate ions into the molten salt, and the io...
Embodiment 2
[0055] The invention discloses a method for preparing a lead-calcium master alloy by a molten salt primary battery method. First place a dry and clean graphite crucible in a lead melting furnace, add 1t of lead into the crucible, and put it into a stirring device; raise the temperature to 350°C for lead melting, turn on the mixer, stir for 5 minutes, then remove the slag and remove surface impurities; then 20kg of halide salts for drying and subsequent use were added to the crucible within 20 minutes, the halide salts were mixed salts of sodium chloride, calcium chloride and magnesium chloride, and the mol ratio of sodium chloride, calcium chloride and magnesium chloride was 0.4:0.33:0.27. Close the lid and raise the temperature to 600°C for salt melting. When the temperature is stable and the salt in the crucible melts, place 1kg of calcium metal in a stainless steel basket and put it in the molten salt as the negative electrode of the primary battery, and the liquid lead is...
Embodiment 3
[0057] The invention discloses a method for preparing lead-calcium alloy by molten salt primary battery method. Put a dry and clean graphite crucible in a lead melting furnace, add 1t of lead into the crucible, and put it into a stirring device; raise the temperature to 400°C, turn on the blender, stir for 4 minutes, and then remove the slag to remove surface impurities.
[0058] Add 10kg of dried electrolyte to the crucible within 10 minutes. The halide salt is a mixed salt of sodium chloride, calcium chloride and potassium chloride, and the molar ratio of sodium chloride, calcium chloride and potassium chloride is 0.43 :0.31:0.26. Close the lid and raise the temperature to 700°C. Wait until the temperature stabilizes and the salt in the crucible melts and acts as an electrolyte. 1.5kg of calcium metal is placed in a stainless steel basket and placed in molten salt as the negative electrode of the primary battery, and the lead liquid is the positive electrode.
[0059] A c...
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