| 摘要 |
<p>Metal values are recovered as chlorides from minerals containing titanium, zirconium and/or magnesium, for example ilmenite, rutile, zircon and magnesite, by forming a composite mixture of a said mineral and a moist plastic mass produced by subjecting brown coal to predominantly shearing forces; compacting the composite mixture to produce a compacted mass, drying the compacted mass, and heating the dried compacted mass to produce a carbonised mass; and heating the carbonised mass in the presence of chlorine to produce chlorides of titanium, zirconium and/or magnesium. The mineral may be mixed with the brown coal before, during or after the shearing treatment.</p> |
