摘要
介绍了从海洋多金属结核中提取有价金属的新工艺,主要包括以下几个部分:①海洋多金属结核的液相氧化,即在氧气存在下利用熔融氢氧化钾作为转化介质生产锰酸钾;②锰酸钾歧化生产高锰酸钾以及锰酸钾热分解生产二氧化锰和氧气;③氢氧化钾的净化和重复利用;④被富集有价金属的回收和精制。新工艺具有低污染、低能耗、操作费用低的特点。
A new process proposed by the authors for leaching metal values from ocean polymetallic nodules is introduced. This process mainly contains several steps, as follows: (1) liquid-phase oxidation of ocean polymetallic nodules, i. e., in the presence of oxygen using molten potassium hydroxide as transforming medium to produce potassium manganate; (2) the production of potassium permanganate from the disproportionation reaction of potassium manganate and the production of manganese dioxide and oxygen from the thermal-decomposition reaction of potassium manganate; (3) clarification and recycle of potassium hydroxide; (4) recovery and refining of other enriched metal values. The new process has the features of less pollution, low energy consumption and low operation cost.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2005年第3期40-43,45,共5页
Modern Chemical Industry
基金
国家自然科学基金(No.20176061)
国家长远发展专项资金(DY105-04-01)
关键词
海洋多金属结核
液相氧化
歧化
热分解
ocean polymetallic nodules
liquid-phase oxidation
disproportionation
thermal-decomposition
