風化花崗岩の乾式微粒分粒
風化花崗岩の乾式選鉱に関する基礎的研究 (第2報)
1981 年 97 巻 1121 号 p. 543-548
詳細
1981 年 97 巻 1121 号 p. 543-548
A continuous sieving device and an air separator were newly designed, the former has air and mechanical vibrator to separate fine particles from disintegrated weathered granite by sonic waves and the latter has zigzagged tube of whic warping angle is changeable to separate them by air. The performance of these two devices was examined and their optimum operating conditions were investigated. The results obtained are as follows.
1) The optimum conditions of sonic waves cycle at each sieve onenino size for the sieving device were obtained as follows:
37μm; 75Hz; coarser than 74μm; 60Hz. The Newton process efficiency under these conditions were 67, 79, 83 and 93% at the sieve opening sizes of 37, 74, 149 and 297μm respectively
2) The optimum warping angle of zigzagged tube of the air separator were 25-35° for the separating particle size of 37μm, and 35° for that of 74 and 149μm. The Newton process efficiency under these conditions were 67, 81 and 93% at the separating particle size of 37, 74 and 149μm respectively.
3) These two devices gave almost the same Newton process efficiency at the fine senaratino narticle Size of 17 and 74μm under the test conditions.
