Baking-melting reduction iron smelting method, apparatus and raw amterial

Abstract

This invention relates to carbon pellets as raw materials smelting reduction ironmaking field. This invention cured composite melting reduction in carbon pellets as raw materials and coal as fuel and reducing agent eventually reinstated. By-baking furnace melting reduction, intermediate storage melt furnace, furnace and eventually reducing coal burning furnace components Cyclones circulatory system. Complex carbon pellets melt-in-baking furnace oxidation reduction carried out in an atmosphere baking heat, the ball nuclear direct reduction, iron oxide pellets outer indirect reduction and then the process of melting, and other pre-reduction. After the first hot the metal from the furnace slag into the final reduction. The final reduction furnace combustion gases into the secondary combustion furnace coal Cyclones with input by the combustion of pulverized coal-baking furnace melting reduction heating.

Description

technical field [0001] The invention relates to the technical field of smelting reduction ironmaking. Especially in the field of smelting reduction using carbon-containing pellets as raw materials, it specifically relates to a carbon-containing pellet that is reduced in an oxidizing atmosphere. Background technique [0002] The concept of the present invention cuts into the background technology from the perspective of energy consumption. A review of existing ironmaking technologies and methods in terms of energy consumption. [0003] The problem of energy consumption in the field of ironmaking has been around for a long time; it has also entered the future, so many generations of craftsmen, engineers and metallurgical researchers have jointly pursued a goal of smelting more metallic iron with less coal. In the large-scale modern human activities Consumption of energy, high carbon dioxide emissions, global warming, and reduction of consumption and emissions are urgently ne...

AI Technical Summary

Problems solved by technology

2. No matter how it is handled, the remaining gas will be converted into carbon dioxide and discharged into the atmosphere, increasing the greenhouse gas load of the atmosphere

The disadvantage is that the coal consumption is 574.7kg / ton, and the standard coal consumption is 490.6kg standard coal / ton iron, which is slightly high. In addition, the remaining gas with 3.46GJ energy still has to be sold to recover the cost

As far as the Chinese patent No. 02144629.6 is concerned, the disadvantages are: 1. The volume and temperature of the high-temperature rich air are lower than the volume and temperature of the high-temperature waste gas

2. The material column in the reduction furnace sits directly on the bottom of the final reduction furnace. The bottom surface of the material column is not ventilated, and the gas can only escape from the bottom side of the material column.

On the contrary, two undesirable effects are obtained: 1, the chemical energy in the product gas of the reduction reaction is converted into thermal energy, which cannot be utilized

2. Make the cloth or unloading mechanism on the furnace body in a high temperature and unfavorable environment

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