【教えて下さい】「due ore」の意味

To provide a method for evaluating disintegration property during reduction of a sintered ore, whereby a change in the disintegration property during reduction of the sintered ore due to temporal changes in reduction conditions under which the sintered ore descends down a blast furnace or a change in the disintegration property during chemical reduction of the sintered ore due to changes in blast furnace operation conditions can be evaluated with precision.
焼結鉱が高炉内を降下する際の還元条件の経時変化による焼結鉱の還元粉化性状の変化や、高炉操業条件の変更による焼結鉱の還元粉化性状の変化を精度よく評価することができる焼結鉱の還元粉化性状の評価方法を提案する。 - 特許庁

http://ejje.weblio.jp/sentence/content/due+ore