天草陶石の脱長石浮選に関する研究 （第２報） 天草陶石の連続式浮選試験とその速度論的考察

Abstract

Following in the first report which elucidated that feldspar (albite) was effectively removed from low grade Amakusa pottery clay by two-stage flotation in laboratory batch-test, continuous flotation has been applied to the process. The results are as follows:1) The semi-batch tests, which were carried out before continuous flotation tests, indicated that each mineral was devided into two groups having the slow and fast flotation rates.2) In the rougher stage of continuous clay flotation, concentrations of collector were higher than the values expected from the semi-batch tests and tailing flow rate of pulp remarkably decreased owing to discharge of froth. As a result, the residual mass ratios showed lower than the simulated value on the basis of the results of semi-batch tests.3) In feldspar flotation, the residual mass ratios agreed well with the simulated ones because tailing flow rate of pulp did not decrease so much and the concentrations of collector were almost consistent with the ones in the semi-batch test.4) The refractoriness of the products obtained by the continuous flotation was improved. It was verified that the continuous flotation process for the removal of feldspar from the low grade Amakusa pottery stone is technically feasible.