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A kind of treatment method of aod slag

A treatment method and slag stuffing technology, applied in the field of slag treatment, can solve the problems of large dust pollution, uneven pulverization, low metal recovery rate, etc., and achieve the effect of improving utilization rate and ensuring uniformity

Active Publication Date: 2022-02-08
SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a treatment method for AOD slag, so as to improve the problems of large treatment site, low treatment efficiency, uneven pulverization, low metal recovery rate, and large dust pollution in the current process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A processing method for AOD slag, comprising the following steps:

[0044] 1) Inhibit pulverization;

[0045] Add borax with a mass ratio of 1% to the AOD primary slag and the AOD reduced slag respectively to obtain the AOD primary mixed slag and the AOD reduced mixed slag;

[0046] 2) Preparation of AOD mixed slag;

[0047] Mixing the AOD initial mixed slag with the AOD reduced mixed slag at a mass ratio of 1:0.5 to obtain the AOD mixed slag;

[0048] 3) Add the AOD mixed slag to the hot stuffy pit;

[0049] 4) fetch water for a section of the hot stuffy pit;

[0050] The AOD mixed slag placed in the hot stuffy pit is sprayed with water to cool down. The cooling time of the water spraying is 120min, and the water volume is 30t / h. After the water is sprayed and cooled, the slag is stuffed. , get a section of AOD mixed slag after slag stuffing;

[0051] 5) The hot stuffy pit draws water in the second stage;

[0052] A section of AOD mixed slag is continued to be sp...

Embodiment 2

[0058] A processing method for AOD slag, comprising the following steps:

[0059] 1) Inhibit pulverization;

[0060] Add borax with a mass ratio of 2% to AOD primary slag and AOD reduction slag respectively to obtain AOD primary mixed slag and AOD reduced mixed slag;

[0061] 2) Preparation of AOD mixed slag;

[0062] Mixing the AOD primary mixed slag with the AOD reduced mixed slag at a mass ratio of 1:1 to obtain the AOD mixed slag;

[0063]3) Add the AOD mixed slag to the hot stuffy pit, and the temperature when the AOD mixed slag is added to the hot stuffy pit is 1200°C;

[0064] 4) fetch water for a section of the hot stuffy pit;

[0065] The AOD mixed slag placed in the hot stuffy pit is sprayed with water to cool down. The cooling time of the water spraying is 120min, and the water volume is 30t / h. After the water is sprayed and cooled, the slag is stuffed. , get a section of AOD mixed slag after slag stuffing;

[0066] 5) The hot stuffy pit draws water in the seco...

Embodiment 3

[0073] A processing method for AOD slag, comprising the following steps:

[0074] 1) Inhibit pulverization;

[0075] Add borax with a mass ratio of 5% to the AOD primary slag and the AOD reduction slag respectively to obtain the AOD primary mixed slag and the AOD reduced mixed slag;

[0076] 2) Preparation of AOD mixed slag;

[0077] Mixing the AOD primary mixed slag with the AOD reduced mixed slag at a mass ratio of 1:2 to obtain the AOD mixed slag;

[0078] 3) Add the AOD mixed slag to the hot stuffy pit, and the temperature when the AOD mixed slag is added to the hot stuffy pit is 1100°C;

[0079] 4) fetch water for a section of the hot stuffy pit;

[0080] The AOD mixed slag placed in the hot stuffy pit is sprayed with water to cool down. The cooling time of the water spraying is 120min, and the water volume is 30t / h. After the water is sprayed and cooled, the slag is stuffed. , get a section of AOD mixed slag after slag stuffing;

[0081] 5) The hot stuffy pit draws ...

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PUM

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Abstract

The invention relates to the technical field of slag treatment, in particular to a method for treating AOD slag, comprising the following steps: inhibiting pulverization; preparing AOD mixed slag; adding the AOD mixed slag to a hot stagnant pit; Compared with the prior art, the method for treating AOD slag provided by the present invention selects borax as the steel slag in order to suppress the pulverization of the slag. Stabilizer is used to inhibit its pulverization. The method of adding is to use an air injection tank to simultaneously spray borax into the slag tank when the AOD initial slag and AOD reduced slag are discharged, so that the AOD initial slag can be fully mixed with AOD reduced slag and borax. ,increase profit.

Description

technical field [0001] The invention relates to the technical field of slag treatment, in particular to a treatment method for AOD slag. Background technique [0002] AOD furnace can produce 200kg of slag when producing 1 ton of stainless steel, and the metal content in the slag is about 10%. And it contains precious rare metals such as nickel and chromium. Therefore, recovering metals in AOD slag and realizing resource recycling are important issues faced by stainless steel production enterprises. [0003] At present, most of the treatment of AOD slag in China adopts the slow cooling process of slag basin. [0004] The slow cooling link in this process treatment method is mainly carried out by means of slag basin air cooling + artificial water spraying. However, this process has the following disadvantages: [0005] 1. The slag basin is air-cooled. Due to the small capacity of the slag basin, the processing capacity is small, the turnover period is long, the slag basin ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/08
CPCC21B3/08C21B2400/024C21B2400/028C21B2400/062C21B2400/066
Inventor 张国柱陈博王永
Owner SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC