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METHOD FOR EXTRACTION OF RARE-EARTH ELEMENTS OF ORE CONCENTRATE OF WEATHERING CRUST OF 'KYNDYBAI' DEPOSIT

机译:一种“金拜”矿风化壳中稀土精矿中稀土元素的提取方法

摘要

FIELD: extraction of rare-earth elements. SUBSTANCE: ore concentrate is ground till size of particles is less than 0.05 mm. Then it is treated by mixture of sodium hydroxide solution (having concentration 100-200 g/l) with sodium carbonate solution (having concentration 100-250 g/l), the process is carried out at 80-110 C. Said treatment takes place by two-stepped process. Excess of mixture of sodium hydroxide solution with sodium carbonate solution from the second step of the process is removed to its first step. During said treatment molar ratio of rare-earth element and sodium in reagents is maintained within 1:(4.5-9) range. Extraction of rare-earth elements is up to 90-97 %. EFFECT: improved efficiency of the method. 4 cl, 1 tbl
机译:领域:提取稀土元素。物质:将精矿磨碎直至颗粒尺寸小于0.05毫米。然后将其通过氢氧化钠溶液(浓度为100-200 g / l)与碳酸钠溶液(浓度为100-250 g / l)的混合物进行处理,该过程在80-110°C下进行。通过两步过程。从该方法的第二步骤将过量的氢氧化钠溶液与碳酸钠溶液的混合物移至其第一步。在所述处理期间,试剂中稀土元素和钠的摩尔比保持在1:(4.5-9)范围内。稀土元素的提取率高达90-97%。效果:提高了方法的效率。 4厘升,1汤匙

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