| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method for water-granulated slag, capable of safely performing without needing new classifying facility or a special water-granulation launder and without increasing a risk of phreatic explosion or the like, and capable of optionally adjusting the grain size of the slag.SOLUTION: There is provided a method for producing a water-granulated slag by contacting with water, the molten slag generated in a copper smelting process to cool and pulverize without classifying. Based on the graph in which the relationship of the grain size of cumulative mass 50% of the water-granulated slag with the Pb appearance quality in the slag is previously plotted, the Pb appearance quality of the slag is obtained between 0.09 and 0.28 mass% from the grain size of the target cumulative mass 50% within a range of 1.10 to 1.60 mm. The raw material of the copper smelting process is prepared by adjusting the blending ratio of copper concentrate, miscellaneous raw materials and silicate ore being a flux so that the Pb appearance quality is obtained.SELECTED DRAWING: Figure 2 |
