The leaching of lead from galena in acidic hydrogen peroxide in presence of sodium chloride solution has been investigated with respect to the effects of hydrochloric acid and hydrogen peroxide concentrations, by changing the stirring speed, leaching temperature and the particle size. It was observed that leaching rate increases with increasing hydrochloric acid concentration, hydrogen peroxide concentration and the temperature. However, it decreases with increase in the particle size. The kinetic study showed that the leaching process is represented by shrinking core model with mixed kinetic. The activation energy (Ea) for the leaching reaction was calculated as 14·60 kJ mol−1, which is suggestive of the mixed controlled kinetics for the leaching reaction.
AdebayoAO and IpinmorotiKO. 2005. Dissolution of galena with acidified hypochlorous acid in excess chloride solution.The European Journal of Mineral Processing and Environmental Protection, 5(1), pp. 94–99.
2.
AdebayoAO, IpinmorotiKO and AjayiOO. 2006. Dissolution of chalcopyrite with hydrogen peroxide in sulphuric acid.Pakistan Journal of Scientific and Industrial Research, 49(2), pp. 65–71.
3.
AydoganS, ErdemogluM, UcarG. and ArasA. 2007a. Kinetics of galena dissolution in nitric acid solutions with hydrogen peroxide.Hydrometallurgy, 88(1–4), pp. 52–57.
4.
AydoganS, ArasA, UcarG. and ErdemogluM. 2007b. Dissolution Kinetics of galena in acetic acid solutions with hydrogen peroxide.Hydrometallurgy, 89, pp. 189–195.
5.
AjayiOO, OladipoMOA, OgunsuyiHO and AdebayoAO. 2002. Determination of the minor and trace elements in Biriniwa's tin pyrite and ornamental lead/zinc ore using neutron activation analysis.Bulletin of the Chemical Society of Ethiopia, 16(2), pp. 207–211.
6.
AkcilA and CiftciH. 2003. Metals recovery from multi-metal sulphide concentrates (CuFeS2-PbS-ZnS): combination of thermal process and pressure leaching.International Journal of Mineral Processing, 71, pp. 233–246.
7.
AsakiZ, TaniguchiT and HayashiM. 2001. Kinetics of the reactions in the smelting furnace of the Mitsubishi process.International Journal of Metals, 53(5), pp. 25–27.
8.
BabaAA. 2008. Recovery of zinc and lead from sphalerite, galena and waste materials by hydrometallurgical treatments. PhD Thesis. University of Ilorin, Ilorin, Nigeria.
9.
BossmannSH, OliverosE, GobS, SiegwartS, DahlenEP, PayawanL, StraubM and WornerM. 1998. New evidence against hydroxyl radicals as reactive intermediates in the thermal and photochemically enhanced Fenton reactions.The Journal of Physical Chemistry A, 102, pp. 5542–5550.
10.
BurkinAR. 1966. The chemistry of hydrometallurgical processes. London: E. & F. N. Spon, 466 p.
11.
DubeRK. 2006. The extraction of lead from its ores by the iron-reduction process: a historical perspective.International Journal of Metals, 58(10), pp. 18–23.
12.
DutrizacJE, ChenTT. 1990. The effect of the elemental sulphur reaction product on the leaching of galena in ferric chloride media.Met. Trans. B., 21(6), pp. 935–943.
13.
FengX, LongZ, CuiD, WangL, HuangX and ZhangG. 2013. Kinetics of rare earth leaching from roasted ore of bastnaesite with sulfuric acid.Transactions of Nonferrous Metals Society of China, 23, pp. 849–854.
14.
FeurstenauM. C, NeboC.O, ElangoB. V and HanK. H1987. The kinetics of leaching galena with ferric nitrate Metal Trans., B, 18B, pp. 25–30.
15.
GardnerJR and WoodsRA. 1979. Study of the surface oxidation of galena using cyclic voltammetry.Journal of Electroanalytical Chemistry, 100, pp. 447–459.
16.
GhoshA and RayHS. 1991. Principles of extractive metallurgy. 2nd ed. New Delhi: Wiley Eastern Ltd.
17.
GoktepeF. 2002. Effect of pH on pulp potential and sulphide mineral flotation.Turkish Journal of Engineering and Environmental Sciences, 26, pp. 309–318.
18.
GreenwoodNN and EarnshawA. 1984. Chemistry of the elements. Oxford: Pergamon Press, pp. 736–745.
KinaevNN, JakE and HayesPC. 2005. Kinetics of reduction of lead smelting slags with solid carbon.Scandinavian Journal of Metallurgy, 34(2), pp. 150–157.
21.
LideDR. 2006. CRC handbook of chemistry and physics. Boca Raton, FL: CRC Press, Taylor and Francis Group.
22.
Nu-NezC., EspiellF. and Garcia-zayasJ. 1980. Kinetics of galena dissolution in hydrochloric acid-chloride solutions.Met. Trans. B., 21(1), pp. 11–17.
23.
OlanipekunE. O. 2000. Quantitative leaching of galena.Bull. Chem. Soc. Ethiopia, 14(1), pp. 25–32.
24.
PatnaikP. 2004. Dean's analytical chemistry handbook. 2nd ed. New York: McGraw-Hill Hand Book.
25.
RathPC, ParamguruRK, JenaPK. 1988. Kinetics of dissolution of sulphide minerals in ferric chloride solution: 1. Dissolution of galena, sphalerite and chalcopyrite.Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy, 97, pp. C150–C158.
26.
SaxenaNN and MandreNR. 1992. Mixed control of copper dissolution for copper ore using ferric chloride.Hydrometallurgy, 28, pp. 111–117.
27.
SchaeferSC and GokeenNA. 1982. Electrochemical determination of the thermodynamic properties of sphalerite, ZnS (beta).High Temperature Science, 15, pp. 225–237.
28.
SohnHY and WadsworthME. 1979. Rate processes in extractive metallurgy. New York: Plenum.
29.
UrbanoG, MeléndezAM, ReyesVE, VelozMA and GonzálezI. 2007. Galvanic interactions between galena-sphalerite and their reactivity.International Journal of Mineral Processing, 82, pp. 148–155.
30.
WarrenGW, KimS. and HeneinH. 1987. The effect of chloride ion on the Ferric chloride leaching of galena concentrate. Metall. Trans. B. 15B, pp. 59–64.
