Method for removing arsenic, antimony and copper by refining raw lead
A crude lead refining and removal technology, applied in the field of crude lead refining to remove arsenic, antimony and copper, can solve the problems of long operation time, poor effect of removing arsenic, antimony and copper, environmental pollution, etc., achieve short operation time, reduce lead volatilization, and the effect of improving the working environment
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Embodiment 1
[0028] First heat the crude lead in an iron open lead melting pot by electric heating, heat and melt and raise the temperature to 450°C, then add Al lumps to the molten crude lead melt at a ratio of 1:1, manually stir for 10 minutes, the Al lumps and crude lead melt Arsenic-antimony-copper in lead melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.40%, w Sb : 0.80%,. w Cu : 0.06%.
Embodiment 2
[0030] First heat the crude lead in an iron open lead melting pot electrically, heat and melt and raise the temperature to 550°C, then add Al powder to the molten crude lead melt in a ratio of 1:2, stir mechanically for 25 minutes, and Al powder and coarse lead melt Arsenic-antimony-copper in lead melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.38%, w Sb : 0.75%,. w Cu : 0.05%.
Embodiment 3
[0032] First heat the crude lead in an iron open lead melting pot electrically, heat and melt and raise the temperature to 650°C, then add Al powder to the molten crude lead melt in a ratio of 1:3, stir mechanically for 45 minutes, Al and crude lead Arsenic-antimony-copper in the melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.30%, w Sb : 0.70%,. w Cu : 0.04%.
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