Abstract: In order to solve the problem of high energy consumption caused by slurry heating during the desilication process of anionic reverse flotation of hematite, lauric acid and liquid bromine are used as raw materials.A new type of anionic collector DX-1 was synthesized by catalytic addition method.The collecting performance of DX-1 was investigated through quartz flotation tests, quartz and hematite artificial mixed flotation tests.The test results show that:at room temperature, DX-1 has strong ability to collect quartz.When pH=11.5, the quartz single mineral flotation test can obtain the index of 99.49% of the recovery rate of quartz, and the flotation test of artificial mixed ore can get the selection index of 65.91% of iron ore grade and 98% of recovery.The mechanism of action was discussed by means of infrared spectroscopy and potentiodynamic analysis.The results show that:There is mainly chemical adsorption on collector DX-1 and quartz surface.Besides, electrostatic attraction and hydrogen bonding may exist.It indicates that DX-1 is a new type of highly efficient anionic collector at room temperature.