A strong magnetic-direct flotation process is used to recover hematite (limonite) from beneficiation tailings. The flotation collector used in the flotation collector is sensitive to temperature. In winter,the pulp needs to be heated,the properties of the processed raw materials are changeable,and the stability of the on-site flotation index is poor. To address this problem,a modified fatty acid anion collector ZK-302 is adopted to replace the original collector,without changing the original adjuster type and process flow. The feasibility is determined through a small laboratory test,and on this basis,industrial test verification is carried out. The results show that after 7 d of industrial test,the comprehensive index of the average TFe grade of 51.37% and the average recovery of 64.21% of the concentrate are obtained under the conditions of the average TFe grade of 32.23% of the flotation feed and the pulp temperature of 15 ℃. After 3 months of continuous production,the flotation index of ZK-302 is stable (the TFe grade of the concentrate is not lower than 50.63%,the TFe grade of the tailings is not higher than 21.07%,and the iron recovery rate is above 61.62%),and the dosage reduces by 0.3 t/d compared with the original collector,indicating that ZK-302 is an effective direct flotation collector of low temperature-resistant hematite (limonite).