研究了间苯二胺、邻苯二胺、对苯二胺对大洋多金属结核酸浸的还原作用，结果表明，上述试剂均可作为多金属结核酸浸的有效还原剂。在室温、苯二胺用量０．２～０．４ｇ／ｇ结核矿、硫酸用量０．９２５ｇ／ｇ、液固比４ｍｌ／ｇ条件下，仅浸出１０～２０ｍｉｎ，多金属结核中锰、钴、镍浸出率即可大于９５％。苯二胺作还原剂用量较大时，出现铜浸出率反而降低的现象。间苯二胺、邻苯二胺的还原浸出效果稍优于对苯二胺 The reduction effect of m-phenylenediamine, o-phenylenediamine and p-phenylenediamine on the acid leaching of marine polymetallic nodules was studied. The results show that these reagents can be used as effective acid reductant for polymetallic nodules. At room temperature, the amount of phenylenediamine 0.2 ~ 0.4g / g nodule ore, the amount of sulfuric acid 0.925g / g, liquid to solid ratio 4ml / g conditions, leaching only 10 ~ 20min, polymetallic nodules manganese, cobalt, Nickel leaching rate can be greater than 95%. Phenylenediamine as reductant dosage is larger, but the phenomenon of copper leaching rate decreases. Phenylenediamine, o-phenylenediamine reduction leaching effect is slightly better than p-phenylenediamine