<報文>高クロムラテライト鉱の乾式処理によるクロム回収について

概要

論文の詳細を見る
Several pyrometallurgical treatments to establish the flow sheet available to make semi-steel and high Cr slag from laterite ore have been carried out. The results obtained are as follows ; 1. High temperature treatments aimed to get better separation of metallic iron and slag containing chromite are undesirable for the following reasons : i) The low viscosity of slag promotes Cr reduction to molten iron, in which Cr content is about 13% at maximum but Cr content of these alloys is fairly lower than that of ferrochromium. ii) The mutual reactions in slag between chromite and other gangue minerals such as Al_2O_3,MgO, etc. lower the Cr content and Cr/Fe ratio in slag, which are not in line with aim of the present investigation. 2. The combination of prereduction of laterite ore at about 1,250℃ with C as a reducing agent (flow sheet A-25p) and magnetic separation is considered to be a method with which to get high Cr containing materials. Instead of prereduction, magnetic roasting by slightly reducing gas is also available.
東北大学の論文
1966-12-20