关键词: 磷矿;钾长石;反浮选;醚胺

Abstract: With the experimental research on a kind of low grade phosphate ore with high silicon and calcium in Hubei.The main gangue mineral is potash feldspar,the P2O5 grade of the raw ore is 19.84％,and the grade of SiO2 is 27.78％.Under the condition that the grinding fineness is 80.16％ passing-0.074 mm and pre removal of dolomite and fine slime,using ether amine cation collector T-609 to remove feldspar.The P2O5 grade of concentrate is 33.65％,the recovery rate is 72.83％.The effective separation of apatite and potash feldspar has been realized.The collector T-609 and potash feldspar are physically adsorbed,and the use of T-609 combine with defoaming agent TOP,the foam properties of cationic collectors to reverse flotation feldspar can be effectively improved.

Key words: phosphate ore;K-feldspar;reverse flotation;ether amine