Method and device for optimizing iron ore through coal-based coking reduction roasting coke magnetic separation
A technology for burning coke and iron ore, which is applied in the field of coal-based direct reduction roasting kiln and mineral optimization, coal-based coking reduction roasting coke magnetic separation optimization of iron ore, can solve the problem that natural raw materials are difficult to meet the needs of large-scale production of direct reduced iron raw materials, gas Based on the problems of industrial production and application of shaft furnace technology and low efficiency of thermal energy recycling, the effect of improving the quality structure and energy structure of steel products, easy promotion, and small investment
Pending Publication Date: 2022-01-28
张雷
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Abstract
The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a method and device for optimizing iron ore through coal-based coking reduction roasting coke magnetic separation. The device comprises a raw material treatment flue gas waste heat utilization system, a coal-based coking reduction roasting system, a coke separation system, a circulating grinding system, a magnetic separation optimization system and an ash and dust removal system. An optimized iron fine powder product is finally obtained through the steps of raw material treatment, coal-based coking reduction roasting, iron ore reduction catalysis coking coal coking, coke separation, circulating grinding and magnetic separation optimization. The method is suitable for treating various types of iron oxide ores with TFe greater than 38%, coking reduction roasting coke volatile matter less than 1.2% meets the ironmaking and steelmaking requirements, the iron recovery rate is obviously improved, the grade of optimized fine iron powder can reach more than 76% of TFe, the sulfur and phosphorus removal efficiency is greater than 60%, energy is saved by greater than 50%, and the problems of high energy consumption, low reduction efficiency, difficulty in thermotechnical control, unstable product quality and shortage of reduced iron raw materials in the existing process are solved.
Application Domain
Increasing energy efficiencyMagnetic separation +2
Technology Topic
Flue gasMagnetic separation +12
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Property | Measurement | Unit |
Particle size | 6.0 ~ 40.0 | mm |
Particle size | 45.0 ~ 55.0 | mm |
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