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System for recovering sensible heat of blast furnace slag

A technology for sensible heat recovery and blast furnace slag, which is applied in the direction of recovery and utilization technology, improvement of process efficiency, steam generation method using heat carrier, etc. Effect

Active Publication Date: 2009-04-29
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the shortcomings of the existing liquid blast furnace slag water quenching method that consumes a lot of water and cannot effectively recycle energy, the present invention provides a sensible heat recovery system for blast furnace slag

Method used

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  • System for recovering sensible heat of blast furnace slag

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Embodiment 1

[0017] Embodiment 1: as figure 1 Shown is a schematic structural diagram of the present invention: a slag particle catcher 2 is installed below the slag flow tank 1, the slag particle catcher 2 is cylindrical, and a double-layer rotor cup 3 is arranged in the middle of the slag particle catcher 2 , the double-layer rotor cup 3 is connected with the motor 8, after the high-temperature liquid slag enters the double-layer rotor cup 3 with a speed of 1500 rpm from the slag launder 1, it is thrown out along the tangential direction of the double-layer rotor cup 3, during this process The slag is broken into slag particles with a diameter of less than 10 mm. The surface of the broken slag particles starts to solidify during flight, and finally hits the water wall 4 of the slag particle catcher 2. The slag particles are crushed on the water wall 4. It is further cooled and completely solidified, then slides down to the bottom of the slag particle trap 2, then falls onto the slag conv...

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Abstract

The invention relates to a blast furnace slag sensible heat recovery system, which belongs to the technical field of residual heat energy recovery. The recovery system comprises a revolving cup, a slag particle catcher, and an exhaust-heat boiler, wherein the slag particle catcher is cylindrical and the middle part of the slag particle catcher is provided with the double-layer revolving cup; the double-layer revolving cup is connected with an electric motor; the periphery of the slag particle catcher is provided with a water screen which is connected with the exhaust-heat boiler through a pipeline; an outlet on the lower end of the slag particle catcher and the upper part of the exhaust-heat boiler are provided with a slag conveying belt; high-temperature liquid slag enters the revolving cup which rotates at a high speed through a slag chute and is thrown away along the tangential direction of the revolving cup, and the slag are crushed into slag particles in the process; the slag particles dash against the water screen of the slag particle catcher, are solidified on the water screen, slide to the bottom of the slag particle catcher, and are conveyed to the exhaust-heat boiler through the conveying belt; and the amount of heat of the slag particles is transmitted to water in the pipeline, the water is vaporized to generate vapor; and the cooled slag is discharged from the bottom of the exhaust-heat boiler.

Description

technical field [0001] The invention belongs to the technical field of recovery of waste heat energy, and in particular relates to the recovery and utilization of heat energy of high-temperature liquid slag. Background technique [0002] The vast majority of my country's steel output is produced using the blast furnace-converter process. Moreover, the electric furnace steel ratio will not increase significantly for a long period of time in the future. Blast furnace slag is a by-product formed from gangue in ore, ash in fuel and non-volatile components in solvent during blast furnace smelting. At present, the smelting of one ton of pig iron in my country produces about 0.3-0.6 tons of blast furnace slag. In 2007, China produced 470 million tons of iron, and even if calculated at 0.3t slag / t iron, the output of blast furnace slag was still 140 million tons. The temperature of liquid blast furnace slag is higher than 1400 ℃, and its treatment is mainly by water washing slag....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/04C21B3/06
CPCY02P10/20Y02W30/50
Inventor 于庆波秦勤刘军祥陆钟武
Owner NORTHEASTERN UNIV
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