Case Study | 207 Stack Sizers ® Improve Iron Ore Classification by Replacing Hydrocyclones Background In May 2003, one of the largest producers of iron ore pellets located in South India contacted Derrick Corporation for assistance in upgrading iron ore concentrate and recovery potential. The mined ore contained 8 to 9 percent silica, while customer specifications required less than 3 percent silica content. The producer had installe

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