Method for electrolytically refining crude lead
A technology for electrolytic refining and crude lead, which is applied in the improvement of process efficiency, photography technology, instruments, etc., can solve problems such as environmental and human harm, and achieve the effects of improving direct yield, improving electrolysis efficiency, and increasing concentration.
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[0019] Example 1
[0020] The lead content in crude lead is 98.30%, and the main impurity components are tin 0.0008%, antimony 0.8281%, bismuth 0.1363%, arsenic 0.5127%, copper 0.0795%, zinc 0.0006%, silver 0.1406%, iron 0.0013%. Tartaric acid, sodium hydroxide and lead oxide were all of analytical grade.
[0021] Weigh 500 g of crude lead, heat it in a muffle furnace at 600 °C, melt it for 15 min, take it out, and cast it into an anode plate in a graphite mold with a size of 10 cm × 10 cm.
[0022] Weigh 200 g of lead oxide, 180 g of sodium hydroxide, and 180 g of tartaric acid into 1.5 L of water, stir magnetically at 70 °C for 4 h, and filter to obtain an electrolyte, in which the lead ion concentration is 110 g / L. Control electrolysis temperature 55 ℃, current density 140 A / m 2 , the electrode spacing is 4 cm, the electrode plate area is 9.7 cm × 9.9 cm, the electrolyte circulation speed is 30 mL / min, and when the cell voltage rises to 1.0 V, the anode plate is taken out...
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[0028] Example 2
[0029] The lead content in the crude lead is 98.10%, and the main impurity components are tin 0.0008%, antimony 0.9106%, bismuth 0.1959%, arsenic 0.5451%, copper 0.0933%, zinc 0.0006%, silver 0.1521%, iron 0.0015%. Tartaric acid, sodium hydroxide and lead oxide were all of analytical grade.
[0030] Weigh 500 g of crude lead, heat it in a muffle furnace to 650° C. for 15 minutes, take it out, and cast it into an anode plate with a size of 10cm×10cm in a graphite mold.
[0031] Take 180 g of lead oxide, 210 g of sodium hydroxide, and 210 g of tartaric acid into 1.5 L of distilled water, stir magnetically at 80 °C for 4 h, and filter to obtain an electrolyte, in which the concentration of lead ions is 100 g / L. The electrolysis temperature was controlled at 45 °C, the current density was 160 A / m2, the electrode spacing was 4 cm, the electrode plate area was 9.7 cm × 9.9 cm, the electrolyte volume was 1.5 L, and the electrolyte circulation rate was 30 mL / min....
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[0037] Example 3
[0038] The lead content in the crude lead is 98.30%, and the main impurities are tin 0.0008%, antimony 0.8281%, bismuth 0.1363%, arsenic 0.5127%, copper 0.0795%, zinc 0.0006%, silver 0.1406%, iron 0.0013%. Tartaric acid, sodium hydroxide and lead oxide were all of analytical grade.
[0039] Weigh 500 g of crude lead, heat it in a muffle furnace at 600 °C, melt it for 15 min, take it out, and cast it into an anode plate in a graphite mold with a size of 10 cm × 10 cm.
[0040] Weigh 100 g of lead oxide, 120 g of sodium hydroxide, and 150 g of tartaric acid into 1.5 L of water, stir magnetically at 70 °C for 4 h, and filter to obtain an electrolyte, in which the lead ion concentration is 80 g / L. Control electrolysis temperature 40 ℃, current density 100 A / m 2, the electrode spacing is 4 cm, the electrode plate area is 9.7 cm×9.9 cm, the electrolyte circulation rate is 8.5 mL / min, and when the cell voltage rises to 1.0V, take out the anode plate, wash the ano...
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