I. Technical name: ferrotitanium magnetite tailings recovery ferrotitanium technology Second, the scope of technology: vanadium-titanium magnetite ore tailings Third, the technical brief (1) Basic principles 1, using the titanium-vanadium magnet tailings selected from iron ore as a starting material, the magnetic field strength is obtained containing TiO 2 17% ~ 19% crude titanium concentrate magnetic tailing out after a period of 1300 amps. 2. After the crude titanium ore is subjected to a closed-circuit grinding process, the weak magnetic sweeping iron is applied, and then the second-stage strong magnetic field with a magnetic field strength of 750 amps is applied to obtain 22% to 24% titanium concentrate containing TiO 2 . 3. After the reverse flotation desulfurization operation, the second section of the strong magnetic tailings enters the whole-grain floating titanium operation. The main agent is R-2 and sulfuric acid. After a coarse and four fine sorting operation, the titanium content can be obtained. 47.00 More than % of titanium concentrate, titanium concentrate after drying is the finished titanium concentrate. The process has the characteristics of short process, simple equipment configuration, low investment and low cost. (two) process The process flow chart of this technology is shown in the figure below. Flow chart (3) Key technologies 1. Magnetic separation technology. Adopting the current domestic advanced magnetic machine SLONφ1750 for strong magnetic tailing, one magnetic field strength is 1300 amps, and the second strong magnetic field strength is 750 amps, which not only ensures the recovery rate of ilmenite, but also improves the floating grade; 2. Grading technology. The world's advanced Derrick high-frequency fine screen is used as the grading equipment to avoid the occurrence of over-grinding, to ensure the optimal particle size composition into the flotation, and to reduce the consumption of flotation chemicals; 3. Flotation technology. The use of the new flotation agent R-2 not only ensures the grade and recovery of the titanium concentrate, but also greatly reduces the cost of the beneficiation . Fourth, technical application and typical projects The Panxi area is rich in vanadium-titanium magnetite resources. The proven reserves are about 10 billion tons, mainly distributed in the four major mining areas of Panzhihua, Baima, Hongge and Taihe. The reserves of TiO2 are 870 million tons, accounting for 35.17% of the world's proven reserves of titanium resources, accounting for more than 90.54% of the proven reserves of titanium resources in China. Therefore, the comprehensive utilization of titanium has always been the top priority of Panxi resources, and has always been valued by all parties. Taihe Iron Mine has obtained a large number of scientific and technological achievements such as optimization of titanium process and full-grain flotation technology to recover ilmenite, which makes the titanium recovery technology of Taihe Iron Mine at an advanced level. In particular, the major breakthrough of full-grain flotation ilmenite technology has formed a complete set of ilmenite recovery technology with independent intellectual property rights, and quickly transformed into productivity, realized industrialization, and improved the comprehensive utilization rate of titanium resources. The comprehensive utilization of titanium resources in Panxi and even the whole country has important significance and role. The investment and income of typical projects of this technology are shown in the table below. Investment and income of typical projects Total investment 44.40 million yuan Of which: equipment investment 33.53 million yuan Operating cost 4879.90 million yuan / year Equipment life 20 years Comprehensive utilization benefit 2143.53 million yuan / year Investment recovery period 2.05 years V. Application effect and promotion prospects Sorting all-new process size fraction recovered from ilmenite having a vanadium-titanium magnetite iron tailing process selected from a novel, reliable technology, high metal recoveries, steady running, easy operation, small human factors, to pulp The particle size and concentration have strong adaptability, etc., and the useful minerals are recovered to the utmost, and the waste of resources is reduced. It can reduce waste discharge by 100,000 tons per year, reduce tailings footprint and environmental pollution, and extend the service life of tailings ponds. It has broad application prospects in the same industry and even the whole country. 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