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首页> 外文会议>International Congress on Mineral Processing and Extractive Metallurgy 11 - 13 September 2000 Melbourne, Victoria >Thermodynamics of Arsenic Behaviour in Pyrometallurgy
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Thermodynamics of Arsenic Behaviour in Pyrometallurgy

机译：火法中砷行为的热力学

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摘要

The thermodynamic properties of arsenic in metal, speiss, matte, slag and gas phases are first summarised in this paper. Arsenic associates with sulphide minerals and generally has compounds of high volatility, but it has a weak affinity for sulphur and a strong affinity for metals. especially copper and iron. In the initial stage of the oxidation of sulphide concentrates arsenic is volatilised easily prior to the oxidationo of FeS, although it tends to be fixed in the condensed phase as FeAsO_4 if the concentrate is over-oxidised. Thermodynamic simulation of oxidative copper smelting revelas the distribution of arsenic between matte, slag and gas, and the possibility of condensation of arsenic from the resulting waste gas is discussed. In reductive smelting more arsenic remains in the metal or mate, and is sometimes concentrated as a separate speiss phase.
机译：本文首先总结了砷在金属，斯皮斯，哑光，炉渣和气相中的热力学性质。砷与硫化物矿物缔合，通常具有高挥发性的化合物，但对硫的亲和力弱，对金属的亲和力强。特别是铜和铁。在硫化物精矿氧化的初始阶段，砷易于在FeS氧化之前挥发，尽管如果精矿被过度氧化，砷往往会以FeAsO_4的形式固定在冷凝相中。讨论了氧化铜冶炼的热力学模拟，揭示了砷在雾面，炉渣和气体之间的分布，以及从产生的废气中冷凝出砷的可能性。在还原性熔炼中，更多的砷残留在金属或配合物中，有时会作为单独的speiss相浓缩。

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