A method for recovering lead from lead-containing waste
A technology for waste and lead oxide, applied in the field of lead recovery, can solve the problems such as the inability to recycle sulfuric acid and sodium carbonate, aggravate the consumption of fluorosilicic acid, and the high cost of citric acid, and achieve elimination of secondary pollution, zero consumption, and production cost savings Effect
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Embodiment 1
[0044] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.
[0045] A method of recovering lead from lead-containing waste, specifically as follows:
[0046] Step 1: Put the leaded waste into the muffle furnace and 2 or under the protection of inert gas under the condition of 600 DEG C for 0.5h, the main component is the roasted lead paste of lead oxide and lead sulfate; through physical and chemical determination, the lead oxide containing 95wt% is contained in the roasted lead paste, and the remainder is a small amount lead sulfate and clay;
[0047] Step 2: Add the above-mentioned 1kg calcined lead paste into a 10L reactor, and add 5.5L of lead perchlorate+0.8mol / L imidazole-5-alpha-alanine at a concentration of 0.4mol / L to the reactor. Mixture A, then heat the reactor to 60°C, and continue to stir for 1h, with a stirring rate of 300r / min; to completely dissolve the lead oxide in the roasted lead paste; perform solid-liquid separation after th...
Embodiment 2
[0053] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.
[0054] A method of recovering lead from lead-containing waste, specifically as follows:
[0055] Step 1: Put the leaded waste into the muffle furnace and 2 or under the protection of inert gas under the condition of 600 DEG C for 0.5h, the main component is the roasted lead paste of lead oxide and lead sulfate; through physical and chemical determination, the lead oxide containing 95wt% is contained in the roasted lead paste, and the remainder is a small amount lead sulfate and clay;
[0056] Step 2: Add 1 kg of the above-mentioned roasted lead paste into a 2L reactor, add 1L of a conjugated solution containing 10mol / L ammonia and 2.0mol / L ammonium sulfate in the reactor as complexing agent B, and then heat the reactor to 50°C, and continuously stirred for 0.5h, with a stirring rate of 380r / min; the lead sulfate in the roasted lead paste was completely dissolved; after the reaction, the...
Embodiment 3
[0064] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.
[0065] A method of recovering lead from lead-containing waste, specifically as follows:
[0066] Step 1: Put the leaded waste into the muffle furnace and 2 Or under the protection of an inert gas, roast 0.5h under the condition of 600 ℃ to obtain the roasted lead paste whose main components are lead sulfate and lead oxide; through physical and chemical determination, the lead sulfate of 90wt% is contained in the roasted lead paste, and 9.5wt% lead oxide and remaining 0.5wt% impurities;
[0067] Step 2: Add 1 kg of the above-mentioned roasted lead paste into a 2L reaction kettle, add 0.95L lead perchlorate with a concentration of 0.4mol / L into the reaction kettle as complexing agent A, then heat the reaction kettle to 60°C, and continuously Stirring for 0.5h, the stirring rate is 300r / min; the lead oxide in the roasted lead paste is completely dissolved; after the reaction, solid-liquid ...
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