Method of directly producing ultra-fine lead oxide powder from galena concentrate
The technology of galena and concentrate is applied in the field of preparing ultrafine lead oxide powder, which can solve the problems of easy damage of crystal lattice, environmental pollution and high energy consumption, and achieves the reduction of the content of impurity elements, the reduction of production costs, and the expansion of raw materials. effect of source
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[0039] 1. The galena concentrate of a lead-zinc mine is used, and the -0.074mm particle size accounts for 85%. The chemical composition is shown in Table 1.
[0040] Pb
Fe
Zn
Cu
C
S
CaO
MgO
SiO 2
58.80
12.52
0.41
0.037
0.57
25.04
0.068
0.038
1.64
[0041] The leaching process conditions are: the leaching solid-liquid ratio is 1 / 4, the pH of the solution is adjusted to 1.20 with hydrochloric acid, the reaction time is 40 minutes, and the reaction temperature is 85°C; the leaching agent FeCl 3 ·6H 2 The amount of O used is 350g / L, and the amount of NaCl is 100g / L. The lead leaching rate can reach 97.39%, and the leaching product lead chloride (PbCl 2 ) purity is shown in Table 2.
[0042] name
W(Cu) / %
W(Fe) / %
W(Zn) / %
W(Ca) / %
PbCl 2
0.0002
0.0035
0.0009
0.0150
[0043] Leaching products from galena conc...
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