The pullback followed an increase in transaction fees for all iron ore futures contracts on the Dalian Commodity Exchange and a rise in iron ore shipments to China.
The dispute between the government and Vedanta started when Zambia appointed a liquidator to run Konkola Copper Mines and accused it of breaching its licence.
Nearly 25 asset management firms and some pension funds are seeking compensation for losses derived from Vale's plummeting share price since the disaster.