Abstract: Due to higher costs at and more difficulty in tungsten slime recovery in Ninghua Xingluokeng Tungsten dressing plant with lower economic benefit, the new process of desliming-desulphurization-flotation in normal temperature-clean separation with centrifuge replaced the original process of desulphurization-bulk flotation of scheelite and wolframite-separation of scheelite and wolframite by flotation, magnetic separation and gravity separation. In the case of a similar concentrate grade, the new process improved the system operation recovery and recovery of raw ores by 43.91% and 6.91 % respectively and decreased the costs at agents and electric power by 69.51%, which successfully resolved the technical difficulties in tungsten slime recovery.

Key words: Tungsten slime, Technical reform, Slime pretreatment, Gravity separation of centrifuge