Method for extracting valuable metal tin components from antimony and tin smelting alkali slag by water immersion neutralization and tin sinking
A technology of valuable metals and alkali slag, which is applied in the field of tin recycling, can solve the problems of environmental pollution hazards, high processing costs, waste of tin resources, etc., and achieve the effects of reducing operating procedures, large processing capacity, and saving time
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example 1
[0034] ⑴ Alkaline slag lean ore raw material Sn: 4.5%, Fe: 5.1%, Pb: 0.12%, containing H 2 0:29.13%, weigh the alkali slag and dry it to constant weight Material: 100 grams, larger than 120 mesh, accounting for more than 70%, liquid:solid=7:1. Stirring reaction at room temperature: 45min, stirring speed: 200 rpm. After the reaction time is up, vacuum filtration: easy. Dry the filter residue at 105°C for 10 hours until the constant weight remains unchanged. The residue rate is 34.21% by weighing. The Sn analysis in the alkali residue is 6.13%, and the leaching rate of Sn in the alkaline solution is 53.3%.
[0035] ⑵ Acidic leaching and alkaline leaching as raw material, use: 0.7moL / L dilute H 2 S0 4 As leaching agent, add 15% hydrogen peroxide as oxidant, liquid:solid=2~3:1, temperature: heat of reaction reaches 97.3%, product Sn: 38.5%.
example 2
[0037] (1) Alkaline slag lean ore raw material Sn: 4.5%, other indicators are the same as Example 1, weigh 100 grams of alkali slag raw material, 120 mesh particle size > 70%, liquid: solid = 8:1, stir and leaching at room temperature, rotating speed 200 rpm Minutes, 1 hour later, stop the vacuum filtration, and dry the filter residue at 105°C until the constant weight remains unchanged. The slag rate is 33.96%. The chemical analysis of the tin in the alkali slag is: Sn: 6.08%, and the alkali leaching rate is 54.1% %.
[0038] ⑵The acid leaching raw material uses a leaching alkali slag, using 0.7moL / L, H 2 S0 4 Join H 2 o 2 The dosage is 10%, liquid: solid = 8:1, after stirring for 1.5 hours, the measured reaction heat is < 45°C, vacuum filtration, acid leaching residue drying to constant weight, slag rate 11.6%, tailing chemical Analysis result Sn: 0.35%, comprehensive leaching rate 99.28%, recovery rate 97.5%, product Sn: 39.1%.
example 3
[0040] ⑴ Sn of alkali slag raw material: 2.7%, other elemental components are not pre-referenced. Weigh and dry to constant weight 500g, the mesh size > 120 mesh accounts for more than 75% (weighing weight ratio), liquid: solid = 4:1, 300 rpm at room temperature, after stirring for 1.5 hours, stop the vacuum filtration, The filter residue was dried until the constant weight was 182.77 grams, the alkali leaching residue rate was 37.55%, the tailing residue analysis was 3.97%, and the leaching rate was 46.3%. Considering that the alkali leaching residue did not meet the requirements, the alkali leaching was repeated, liquid:solid=6 : 1, after stirring and leaching at room temperature for 40min, vacuum filtration, drying the tailings at 105°C to a constant weight of 175.61 grams, the alkali residue rate was 35.1%.
[0041] ⑵ acid leaching is a leaching alkali slag as raw material, using 0.8moL / L dilute H 2 S0 4 As a leaching agent, stir for 1 hour, rotate at 250 rpm, vacu...
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