SU1435560A1 - Installation for processing blast-furnace slag melt - Google Patents

Description

The invention relates to the production of building materials from slag melts both directly at the furnace and outside the blast furnace.

The aim of the invention is to reduce the power consumption of the installation due to the heat recovery of the liquid slag.

The drawing shows a schematic of the installation. I The plant for processing blast furnace slag melt contains a pigger 1 with immersed burners 2, a device 3 for producing solid slag located in the lower part of the piggy 1, a heat exchanger A with convective heating surfaces, installed at the outlet of the piggy 1, an air heater 5 installed downstream of the heat exchanger 4, the first gases, the aeration chamber 6 connected by a pneumatic tube 7 to a hollow comb 8, rigidly connected to the burners 2, an adjusting regulator 9 electrically connected to the valves 10 11 finds schimis 1for air pipes in 1kameru 6 and aeration burners 2 cooperating through temperature sensor 12 with the interior of Ko; Ilnyk 1.

The installation works as follows.

G Liquid slag (at 1500–17004) | enters the accumulator 1 and further into the device 3 for the production of solid slag with the specified parameters of slag building materials, where it is cooled (up to 1000–1200 ° C), heat is released by means of flue gases to heat exchanger 4 and air heater 5. Compressed air, heated in air heater 5, preheater 5 to a temperature that eliminates the possibility of sintering dust-like additives in the aeration chamber 6, enters the burner 2, where it is high; enthalpy b, more economically supports the process of heat release when a fiery jet of burning fuel has elapsed. At the same time, part of the compressed air as a result of heating, having a low relative humidity, enters the aeration chamber 6 of powdered

h

additives, in which ash can be used, for example, from a thermal power plant, and efficiently transports it through the pneumatic tubing 7 to the hollow nozzles

Q 5 0 5

0

five

0

five

0

five

comb 8. In the ash of thermal power plants can be up to 30% of the fuel, which is in contact with the liquid slag (temperature 1500-1700 C) burns out with the release of a certain amount of heat. As a result, it is possible to reduce the amount of main fuel entering into the burner 2 by an amount equivalent to the heat released during the afterburning of additional fuel, which is a component of the ash coming from the nozzles of the hollow comb 8. torus 9, controlling by means of temperature sensor 12 thermal processes in the slag melt. Moreover, the ratio of fuel and ash entering the boiler 1 is also regulated by a given technology for producing a alkaline building material, since a CBbmie of 70% of the volume of ash in this case is an additive to the melt and affects the quality of the resulting product accordingly. Application of the proposed packaging. will reduce the energy consumption of the plant due to heat recovery of the slag melt processing process, namely, the flow of hot air into the burners heated by the waste gases of the stove, improves the combustion conditions of the fuel supporting the slag in a liquid state, reduces heat loss from chemical and mechanical incompleteness fuel combustion, raises the temperature of its combustion. Increasing the relative humidity of compressed air normalizes its consumption during the pneumatic conveying of additives during the production of building materials.

Claims (1)

Invention Formula A plant for processing blast-furnace slag melt, containing an accumulator with burners made with the possibility of moving, a device for producing solid slag and a heat exchanger with convective heating surfaces, characterized in that, in order to reduce the energy intensity of the installation due to heat recovery of the liquid slag, it additionally equipped with air heater, aeration chamber and comb, while 31435560. An air heater is sequentially connected to the burners of the furnace and connected to the aeration chamber through a duct chamber through a pipeline, and a comb through a pneumatic air duct.