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It is well not to leave the sluicing for too long a period, as when the slimes and tailings are set hard they are difficult to remove. Where a permanent reducing plant is to be erected, whatever form of mill may be adopted, it is better for many reasons to use automatic ore feeders.
Where water is scarce, and is consequently used over and over again, lime may be added to the pulp, or, if lime is not procurable, wood ashes may be used. The effect is two-fold; the lime not only tends to "sweeten" sulphide ores and keep the tables clean, but also causes the water to cleanse itself more quickly of the slimes, which will be more rapidly precipitated.
Just like him, the slacker! And when he does come over on our side of the House, he slimes about in carpet slippers the beast!" Lawrence entered as Scaife spoke. John saw that his strongly-marked eyebrows went up, when he perceived the butler. He approached, and took the sheet of paper. The butler said impressively "Mr. Rutford is busy. Will you call over, sir?"
Up and down and round about her voice flew, the beast threw back his head so that the diabolical face fronted hers, and the torrent of his breath prepared her for his feast as the anaconda slimes his prey. Franticly she darted from tune to tune; his restless movements followed her.
Much of this elaboration will be seen to be needless, and, moreover, better commercial results will be obtained when it is more clearly perceived that the recovery of a valuable ore in the form of a fine slime may be economically effected by the action of grinders specially constructed for the purpose of permitting the hard constituents of the ore to remain in comparatively large grains, while the other and softer minerals are reduced to fine slimes or dust.
Probably for this mode of treatment Krom rolls would be found more effective reducing agents than stampers, as with them the bulk of the ore can be broken to any required gauge and there would consequently be less loss in "slimes."
In dealing with some very light classes of ore, and especially such as may naturally crush very fine that is to say, with a large proportion of impalpable "slimes" there is a decided advantage in causing the water to drift sidelong on the smooth shelf by other means than the motion in a circular tank.
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