Research Article
Thermodynamic Behavior of Pyrite and Arsenopyrite in Preoxidation for Chlorination Leaching of Refractory Gold Concentrate
Table 1
Values of the ∆fG0 FeS2-H2O system and FeAsS-H2O system at 298.15K.
| Component | ∆fG0 (kJ/mol) | Component | ΔfG0 (kJ/mol) | Component | ΔfG0 (kJ/mol) |
| H2 | 0 | Fe | 0 | H3AsO3 | −639.8 | H− | 0 | Fe2+ | −78.9 | H2AsO3− | −587.1 | O2 | 0 | Fe3+ | −4.7 | HAsO32− | −517.2 | H2O | −237.1 | Fe(OH)2 | −479.3 | AsH3 | 168.9 | S | 0 | Fe(OH)3 | −696.5 | FeS2 | −166.9 | HSO4− | −755.9 | As | 0 | FeS | −100.4 | SO42− | −744.5 | H3AsO4 | −766.0 | FeAsS | −109.6 | H2S | −26.9 | H2AsO4− | −753.2 | FeAsO4 | −768.6 | HS− | 12.1 | HAsO42− | −714.7 | | | S2− | 85.8 | AsO43− | −648.4 | | |
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