http://www.xinhaimining.com/en/news_text_7_159.html With the continuous copper ore mining , there is fewer and fewer high-grade copper ore, and copper ore block size is getting smaller and more complex. Ordinary flotation process seems not available for those ore. At this time, "poor, fine, miscellaneous" copper ore dressing process - the biological leaching process was born. The following is a brief introduction of biological leaching of copper production line.