A dry processing device for blast furnace slag based on high temperature slag waste heat recovery

A blast furnace slag and dry processing technology, which is applied in the field of liquid blast furnace slag processing and blast furnace slag dry processing equipment, can solve the problems of difficult recovery of solid slag, high-quality heat source steam, large water consumption, etc., and achieve operating costs and The effect of low equipment manufacturing cost, reduced water consumption, and scientific device structure

Active Publication Date: 2018-11-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this application is that it is difficult to recover the high-quality heat source and steam of solid slag produced in the blast furnace slag treatment process, and the water consumption is relatively large

Method used

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  • A dry processing device for blast furnace slag based on high temperature slag waste heat recovery
  • A dry processing device for blast furnace slag based on high temperature slag waste heat recovery
  • A dry processing device for blast furnace slag based on high temperature slag waste heat recovery

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Experimental program
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Effect test

Embodiment 1

[0049] combine figure 1 , the blast furnace slag dry processing device based on high temperature slag waste heat recovery in this embodiment includes: a slag treatment box 2, blast furnace slag falls from the top of the slag treatment box 2, and is discharged from the bottom of the slag treatment box 2; cooling unit, cooling unit It includes a mechanism for forming a high-pressure water column inside the slag treatment box 2 to impact and cool the falling blast furnace slag. (In the blast furnace slag dry processing device based on high temperature slag waste heat recovery in this embodiment, "blast furnace slag" refers to the liquid blast furnace slag discharged from the blast furnace, and "dry processing" refers to the final treatment of the liquid blast furnace slag with a low water content. The slag particles 9, the slag particles 9 are solid particles)

[0050] In this embodiment, the blast furnace slag falls from top to bottom in the slag treatment box 2, which is condu...

Embodiment 2

[0052] combine figure 1 The structure of the blast furnace slag dry processing device based on high temperature slag waste heat recovery in this embodiment is basically the same as that in Embodiment 1, and further:

[0053] The blast furnace slag dry treatment device based on high temperature slag waste heat recovery of the present embodiment also includes a steam pipe 8, and the wall surface of the slag treatment box 2 is a cooling water interlayer 201 filled with cooling water inside (the design of the cooling water interlayer 201 ensures high The slag flows in the low-temperature environment surrounded by the slag treatment box 2, which improves the cooling efficiency of the blast furnace slag), and the steam pipe 8 communicates with the inside of the slag treatment box 2. A slag discharge tank 1 is arranged above the slag treatment box 2, and the liquid blast furnace slag to be treated flows out from the slag discharge tank 1 and enters the slag treatment box 2. The botto...

Embodiment 3

[0060] combine figure 1 The structure of the blast furnace slag dry processing device based on high temperature slag waste heat recovery in this embodiment is basically the same as that in Embodiment 2, further: the angle between the axis of each water column nozzle and the horizontal plane is the same, specifically in this embodiment , the angle between the axis of each water column nozzle and the horizontal plane is 0 to 30°. It should be noted that if the angle between the axis of the water column nozzle and the horizontal plane is too large, it is not conducive to the formation of blast furnace slag along the "zigzag" route. Specifically, this embodiment Take 30° in the center; the pressure of the water column sprayed by the water column nozzle is 0.2-2.0MPa. If the water column pressure is too small, it will not be able to impact the blast furnace slag. " font route flows, specifically gets 2.0MPa in the present embodiment. In the slag treatment box 2, two layers of wate...

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Abstract

The invention discloses a blast furnace molten slag dry method treatment device based on high-temperature slag waste heat recovery. The blast furnace molten slag dry method treatment device comprises a furnace slag treatment box and a cooling unit, wherein blast furnace slag falls from the top of the furnace slag treatment box; and the cooling unit comprises a mechanism used for forming water columns in the furnace slag treatment box to impact and cool the fallen blast furnace slag. The cooling unit comprises spray nozzles. The spray nozzles comprise a plurality of layers of water column spray nozzle bodies used for spraying out the water columns. The multiple layers of water column spray nozzle bodies are arranged on the two opposite side faces of the inside of the furnace slag treatment box up and down in a staggered mode, so that the blast furnace slag falling in the corresponding positions can fall in a Z-shaped path. The blast furnace molten slag dry method treatment device based on high-temperature slag waste heat recovery is relatively simplified, water consumption is reduced, and particularly, solid-state furnace slag particles maintained in a high-temperature state can be provided; and the temperature of the furnace slag particles are controllable, so that a high-quality heat source is provided for waste heat recovery.

Description

technical field [0001] The invention relates to blast furnace slag processing equipment in the iron and steel metallurgy industry, more specifically, to a blast furnace slag dry processing device based on recovery of high temperature slag waste heat, and in particular to the processing of liquid blast furnace slag. Background technique [0002] While producing molten iron, the blast furnace also produces a large amount of liquid blast furnace slag. The temperature of liquid blast furnace slag is 1400~1500℃, which contains high heat energy. The heat contained in each ton of liquid blast furnace slag is equivalent to the heat contained in about 64kg of standard coal. It is a high-grade waste heat resource and has a high recycling rate. value. At the same time, blast furnace slag is a silicate material with good performance, which can be used as a raw material for the production of building materials and chemical fertilizers. Blast furnace slag after quenching treatment has p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/08C21B3/06
CPCC21B3/06C21B3/08Y02P10/20Y02W30/50
Inventor 陈德敏陈光王恒达包向军李显宝
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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