三相氧化法富集分离大洋多金属结核中有价金属

Tri-phase oxidizing to enrich and separate valuable metals in polymetallic modules

大洋多金属矿是以铁锰氧化物为主相的复杂矿物,利用大洋多金属矿三相氧化法提取锰,并使铁铜钴镍富基于渣中的方法是富集分离有价金属的新途径。最佳反应条件是：温度240℃；时间2h；碱锰的物质的量的比为45；通气量0.5m^3·h^(-1)；锰粉粒度为-200目。铁镍的固相富集率接近100％,铜钴大于93％。液相氧化反应后Fe,Cu,Co,Ni等金属基本上被分配到渣中,赋存在矿物中的变价金属氧化物对锰酸钾的反向分解有促进作用,初步实现了这些金属与Mn的分离。

Marine polymetaUic nodules were mainly consisted of manganese and iron oxides. The experiments prove that it was feasible to extract manganese from nodules and enrich copper nickel cobalt oxides in the residues by the method of tri-phase oxidizing. The optimized parameters are： 240℃ ; 2 h; a ratio of the amount of substance of KOH/MnO2 about 45 ; an air supply of 0.5 m^3·h^-1 ; a particle size of powders less than 200 mesh. The enriching ratio of Fe and Ni is nearer 100 % and those of Cu and Co are both more than 93 %. The metals which located in the matrix might accelerate the decomposing of potassium manganete; for the potassium manganete was soluble, this reaction also realized the seperation of manganese and other metals.