Method for removing cadmium and ferrum from crude antimony by using metaphosphoric acid
A technology of iron metaphosphate and cadmium metaphosphate, applied in the field of antimony pyrometallurgy, can solve the problems of difficulty in grasping the operation points, poor separation effect, inability to refine crude antimony, etc., and achieves good iron removal effect, good environmental protection benefits, and removal of Good effect of cadmium
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[0039] Attached below figure 1 Describe the specific embodiment of the present invention in detail:
[0040] A method for removing cadmium and iron in crude antimony with metaphosphoric acid, which is carried out according to the following steps:
[0041] 1. Add 400-500 kg of metaphosphoric acid to the reverberatory furnace containing the crude antimony liquid (the amount of metaphosphoric acid added is calculated as 30-40 kg per square meter of antimony liquid surface), and continue to increase the furnace temperature to melt the metaphosphoric acid and make it Covered on the surface of antimony liquid.
[0042] 2. Turn on the air compressor, and insert the pig iron blowing pipe into the antimony liquid from the working door of the reverberatory furnace to blow air (the amount of air blown in is suitable for the surface of the antimony liquid to bubble slightly. If the air volume is too large, the antimony oxide will volatilize too much. Affect the direct yield of antimony...
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