Method and device for solar reduction iron making

Abstract

The invention discloses a method and a device for solar reduction iron making. The device comprises a solar photovoltaic cell, a wind driven generator, an electrolyzer, a hydrogen heating chamber, a solar reduction furnace and gas treatment equipment. The hydrogen heating chamber and the reduction furnace are provided with a composite optical heating system consisting of a condenser, a heliostat and heat absorbing equipment. In the process of solar reduction iron making, hydrogen prepared by electrolyzing water is used as a reducing agent, the hydrogen is preheated and heat is provided for iron oxide reduction through a photo-thermal principle, the preheated hydrogen is introduced into the solar reduction furnace for reduction reaction so as to generate iron, the iron is smelted into molten iron, and the rest hydrogen is purified, and fed into a system for recycle through a circulating fan. Through the solar reduction iron making, non-renewable energy resources are saved, and the emission of greenhouse gases such as CO2 and the like is avoided. The electrolyzed hydrogen does not contain any harmful impurities, the temperature required by reduction in the reduction iron making process taking the hydrogen as the reducing agent is low, the reaction time is short, carbon dioxide is not generated, and the reduced iron has good quality.

Description

technical field

[0001] The invention belongs to the technical field of new energy utilization and metallurgy, and in particular relates to a method and device for smelting reduction ironmaking by utilizing solar energy. Background technique

[0002] Reduction ironmaking is an important part of iron and steel production. Its main feature is to use non-coking coal as a primary energy source and reducing agent to reduce iron oxides in a molten state. It has the advantages of using coal instead of coke, short process, and less environmental pollution. , low construction investment, low production cost and other advantages, it is widely optimistic about the field in the industry, and iron and steel enterprises in various countries are competing to carry out research and development. The existing reducing ironmaking methods mainly include COREX method (CN1010323B), DIOS method (CN1035136A), and HISELT method (CN1037542A). Among them, the COREX method has been produced industriall...

Images