11. The remaining 40 % of ore went to the ball mill and froth flotation plant. 12. The process, called froth flotation , is now used in every major metal mine in the world. 13. Consequently, the development of the froth flotation process was a major step forward in mineral processing. 14. The gravity-fed concentrator was highly innovative, as, for example, in the use of bulk froth flotation . 15. For example, in copper extraction pine oil is used to condition copper sulfide ores for froth flotation . 16. Froth flotation was added in the 1920s.17. In the 1910s and 1920s, copper mills adopted the froth flotation method, which had been developed in Australia. 18. Its processing plant uses froth flotation to produce a product rich in potassium chloride ( " KCl " ). 19. In froth flotation , the cultivator aerates the water into a froth, and then skims the algae from the top. 20. Froth flotation is typically used to separate coal particles from ash or particles of valuable minerals from gangue material.
