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对大洋多金属结核经氨浸提取Co,Ni,Cu后的固体残渣（氨浸渣）以及富钴结壳经酸浸提取Co,Ni,Cu,Zn,Mn后的固体残渣（酸浸渣）的物相、成分和物化性能进行了系统研究.结果表明,氨浸渣和酸浸渣都含有大量纳米矿物,前者以菱锰矿为主,平均粒径为17.9nm;后者以半水石膏为主,平均粒径为9.5nm.半水石膏具有孔道结构,孔体积为1.23×10-2mL/g.氨浸渣和酸浸渣的比表面积较大,对饱和NaCl水蒸气、N_2和SO_2气体的吸附能力强.稀土元素含量都很高,多呈离子吸附态存在.∑FeO含量高,且酸浸渣中P_2O_5明显富集.浸出渣独特的成分和纳米固体属性,预示其在环保及材料领域具有良好的应用前景和潜在价值.
The solid residue (acid leaching residue) after the cobalt and cobalt-rich crusts of Co, Ni, Cu and Zn were removed by acid leaching from Co, Ni, Cu, The results showed that the leaching residue and acid leaching residue contained a large amount of nano-minerals, the former mainly rhodochrosite, the average particle size of 17.9nm; the latter with hemihydrate gypsum as The average particle size is 9.5nm.The hemihydrate gypsum has a pore structure with a pore volume of 1.23 × 10-2mL / g.The specific surface area of the ammonia leached residue and the acid leached residue is larger, and the saturated NaCl water vapor, N 2 and SO 2 gas Of the adsorption capacity of rare earth elements are high, mostly ion-adsorption exist.ΣFeO content is high, and acid leaching residue P_2O_5 significantly enriched leaching residue unique composition and properties of nano-solid, indicating its environmental protection and materials The field has good application prospects and potential value.