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据英国报道,已进行了原生和再生炼铜炉渣的硫酸化焙烧,以促使铜、镍、钴、锌和铁易于溶解。该法包括渣粉预焙烧,接着与黄铁矿一道焙烧,然后用水浸出。探索了焙烧和浸出条件对有价金属回收率的影响。 在直接焙烧硫化物的原生炉渣达到大量铜溶解的同时,与加入的黄铁矿一道焙烧提高了回收率。这项技术也使得可从次生熔炼炉渣中回收铜。在最佳条件下,可回收95％以上的铜,以黄铁矿:炉渣=0.25,在550℃下,把预焙烧的炉渣与黄铁矿一起焙烧1h,仅可达到钴、镍和锌的
According to the British report, sulfation roasting of native and regenerated copper-smelting slag has been conducted to facilitate the easy dissolution of copper, nickel, cobalt, zinc and iron. The process includes pre-baking of the slag, followed by calcination with pyrite and then leaching with water. The effects of roasting and leaching conditions on the recovery of valuable metals were explored. While the primary slag directly calcined to sulfide reaches a large amount of copper dissolved, calcination with added pyrite improves recovery. This technology also makes it possible to recover copper from secondary smelting slag. Under optimum conditions, more than 95% of the copper can be recovered, with pyrite: slag = 0.25, calcined at 550 ° C for 1h with pyrite and only reaching cobalt, nickel and zinc