Blast-furnace cement sensible heat recovery system and its production process

Abstract

The invention relates to a blast furnace slag heat recycle system and relative production, wherein it is formed by cooling-breaking, gas-slag heat exchanger, and left-heat boiler units; the slag outlet has cooling-braking unit which will cool the slag to the solidify point 1200-1300Deg. C, to be broken into the slag particles whose diameter is less than 100mm; the transmitter is connected to the gas-slag heat exchanger to heat the air to 700-800Deg. C; the slag will be cooled under 150Deg. C; the heated air will be transmitted to the left-heat boiler; the water of heating tube of boiler will adsorb the heat of gas, to generate the steam whose pressure at 0.3-0.4MPa and temperature at 260-350Deg. C. The invention can improve the energy recycle efficiency more than 70%, to reduce the energy consumption of steel production, reduce the consumption of cooling water, and reduce the environment pollution.

Description

technical field [0001] The invention belongs to the technical field of recovery of waste heat and energy, and in particular relates to a blast furnace slag sensible heat recovery system and a production process for recovering and utilizing heat energy of high-temperature liquid slag. Background technique [0002] Steel is an important basic structural material and functional material in national economic construction. In the 21st century, the world has entered a new historical era of economic globalization and informationization, but steel is still needed as a support. With the rapid growth of steel production, resources, energy and pollutant emissions have become restrictive factors restricting the further development of my country's steel industry. Therefore, in the process of my country's iron and steel industry taking a new industrialization road, efforts should be made to reduce energy consumption, water consumption and raw material consumption, do a good job in enviro...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that not only the sensible heat of the blast furnace slag cannot be utilized, but also a large waste of water resources is caused, and serious pollution is caused to the atmosphere, water and soil, which deteriorates the working environment.

The disadvantage of this technology is that, firstly, when the drum cools the liquid slag, the drum and the steel balls are under the action of high temperature, the temperature rises, and deformation is easy to occur, which affects the condensation of the liquid slag; secondly, the temperature of the cooled steel slag is low, which can Use less heat

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