APPARATUS AND METHOD FOR SORTING HIGH-QUALITY LIMESTONE

PROBLEM TO BE SOLVED: To provide a foreign matter removing apparatus which can efficiently remove a foreign matter from among conveyance matter according to a kind of the foreign matter to thereby produce high-quality limestone.SOLUTION: A foreign matter removing apparatus 100 includes an image detector 18, a magnetic detector 19 and/or an infrared detector 18' for detecting foreign matter included in conveyed limestone ore and its position and further includes a separation means 16 for separating detected foreign matter from the limestone ore to obtain high-quality limestone. The image detector 18 detects low-purity limestone as the foreign matter, the magnetic detector 19 detects a metal in the limestone ore as the foreign matter and the infrared detector 18' detects a vinyl chloride resin in the limestone ore as the foreign matter.