| 摘要 |
PURPOSE:To recover and utilize slug as starting materials of lime for a blast furnace or sintering furnace and as fertilizer or soil improver by a method wherein converter slug is crushed and part containing phosphorus and part containing iron oxide and lime are separated by the difference in their specific gravity. CONSTITUTION:Iron values such as iron oxide, particulate iron, lime value and phosphoric acid value are contained in converter slug. the slug is crushed, and particulate iron is separated by magnetic separation. The specific gravity of a mixed solution of thallium formate and thallium malonate is adjusted to 3.45 to form a specific gravity separation solution. Phosphoric acid-containing part is separated as floating phase and utilized as fertilizer or soil improver. The part precipitated by the specific gravity separation method is stirred in the aqueous solution consisting of the above components, the specific gravity of which is adjusted to 4.0, to precipitate and separate a part containing a large amount of iron oxide and lime. After drying, the part is effectively utilized as a substitute for lime which is used in a blast furnace or iron ore-sintering furnace. |
