Research Progress of Flotation Technology and Reagents for Micro-fine Scheelite
Tungsten,as a rare metal and strategic metal,has the characteristics of high melting point,high density,high hardness and good wear resistance,and is widely used in aerospace,electric power,machinery and medicine and other fields,which not only plays an important role in China's economic development,but also has strategic significance for China's scientific and technological progress and national security.China's tungsten reserves account for about half of the world's tungsten reserves,which is very rich and has great potential for development.Due to the extensive use of tungsten resources that are easy to exploit,scheelite resources gradually appear the characteristics of"poor,fine and miscellaneous".The effective use of micro-fine scheelite becomes particularly important.Fine scheelite is brittle,and symbiosis with calcium-containing gangue minerals(calcite,fluorite and apatite,etc.),they have similar chemical and physical properties,and have the same calcium ion active site,so that the adsorption of flotation reagents on their surface is not selective,resulting in the recovery of fine scheelite becomes more difficult.The difficulties of the flotation of micro-fine scheelite are described in detail,and the flotation process and flotation reagents of micro-fine scheelite are analyzed and finished.The future research direction of the flotation process and flotation reagents of fine scheelite is prospected and reference for the optimization of fine scheelite flotation process and the selection of environmentally friendly flotation reagents can be provided.
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