A method for comprehensive recovery of valuable metals in waste residues containing lead and zinc in a pyrotechnic-wet process parallel process
A valuable metal and pyrotechnic technology, applied in the direction of process efficiency improvement, photographic process, photographic auxiliary process, etc., can solve the problem of ineffective extraction of various slag valuable metals, etc., to achieve low production cost and high recovery rate , The effect of low-carbon economic industrial production
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Embodiment 1
[0077] A method for comprehensively recovering valuable metals in waste slag containing lead and zinc by a fire method-wet method parallel process comprises the following steps:
[0078] First, raw material processing:
[0079] S1. Ingredients and billet making: Take the waste residue containing lead and zinc from an electrolytic zinc enterprise, mix it with sulfur fixative and flux at a mass ratio of 100:5:5, and obtain a powder. The moisture content of the powder is 12%; the powder is pressed under 30MPa to form a compact and then dried to a moisture content of 5% and a Pb content of 20% to 25%, to obtain a compact;
[0080] S2. Oxygen-enriched and sulfur-fixed reduction smelting: add the briquette and coke in a mass ratio of 100:11 to 7.8m 2 Melting is carried out in an oxygen-enriched sulfur-fixing reduction melting furnace, melting conditions: coke rate 10%, blast intensity 39m 3 / min·m 2 , wind pressure 16kpa, slag type Fe / SiO 2 / CaO is 24:27:18, the oxygen enrichmen...
Embodiment 2
[0102] A method for comprehensively recovering valuable metals in waste slag containing lead and zinc by a fire method-wet method parallel process comprises the following steps:
[0103] First, raw material processing:
[0104] S1. Ingredients and billet making: Take the waste residue containing lead and zinc from an electrolytic zinc enterprise, mix it with sulfur-fixing agent and flux at a mass ratio of 100:7:8, and obtain a powder. The moisture content of the powder is 14%; the powder is pressed under 40MPa to form a compact and then dried to a moisture content of 5% and a Pb content of 25% to 28%, to obtain a compact;
[0105] S2. Oxygen-enriched and sulfur-fixed reduction smelting: add the briquette and coke in a mass ratio of 100:11 to 7.8m 2 Melting is carried out in an oxygen-enriched sulfur-fixing reduction melting furnace, melting conditions: coke rate 10%, blast intensity 39m 3 / min·m 2 , wind pressure 16kpa, slag type Fe / SiO 2 / CaO is 24:27:18, the oxygen enric...
Embodiment 3
[0127] A method for comprehensively recovering valuable metals in waste slag containing lead and zinc by a fire method-wet method parallel process comprises the following steps:
[0128] First, raw material processing:
[0129] S1. Ingredients and billet making: Take the waste residue containing lead and zinc from an electrolytic zinc enterprise, mix it with sulfur fixative and flux at a mass ratio of 100:8:10, and obtain a powder. The moisture content of the powder is 15%; the powder is pressed under 50MPa to form a compact and then dried to a moisture content of 6% and a Pb content of 18% to 22%, to obtain a compact;
[0130] S2. Oxygen-enriched and sulfur-fixed reduction smelting: add the briquette and coke in a mass ratio of 100:12 to 7.8m 2 Melting is carried out in an oxygen-enriched sulfur-fixing reduction melting furnace, melting conditions: coke rate 12%, blast intensity 45m 3 / min·m 2 , wind pressure 18kpa, slag type Fe / SiO 2 / CaO is 26:30:20, the oxygen enrichme...
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