介绍了硫酸铵氨络合浸出法直接由矿物原料制取等级氧化锌新工艺。
Direct preparation of grade zinc oxide from zinc oxide ores or zinc bearing materials by using ammonium sulfate and ammonia leaching process has been described.
介绍了银渣回收银的试验研究情况，采用硫酸浸出-氨浸法处理银渣，工艺简单合理，技术指标高，有一定的推广价值。
It describes the test and research on recovering silver from silver bearing residue by using sulfuric acid leaching ammonia leaching process, which is simple and worthy of promotion.
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