| The dressing research is carried out on WanLongbei K-feldspar ore in Tieling city Liaoning province according to its characteristics of high iron content and low grade, and finally obtains the K-feldspar concentrate which can meet the requirement of premium product in ceramic industry.First of all, process mineralogy and chemical element analysis are carried out and the results show that WanLongbei K-feldspar ore is of high iron content and low grade, the main gangue minerals are quartz and mica, the harmful element iron is mainly contained in the biotite and a small amount of garnet and tourmaline. The process of preconcentration discarding tailings above2mm is selected based on the screening test results of broken grade samples. And then a series of processing operations like grinding, desliming, flotation and magnetic separation are carried out, the dressing process of grinding-desliming-classified flotation of mica-regrinding-separation of feldspar and quartz-high intensity magnetic separation is decided at last. And the optimum dressing conditions are obtained by large numbers of tests. The yield of K-feldspar concentrate obtained in this research is42.38%and the grade of K2O, Na2O, Fe2O3and Al2O3are8.87%,3.76,0.13%and17.14%, White degree of the concentration is also above65%. So, all the indicators can meet the quality requirements of the premium product in ceramic industry.The separation research of feldspar and quartz is carried out under the conditions of acidic by the method of using mixed collectors, overcomed the shortcoming of the process using HF, and the results of this paper will have a certain referential significance for comprehensive utilization of feldspar with low grade. |
PDF Full Text Request