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Method for comprehensively utilizing air quenched slag of steel converter

A technology for steelmaking converters and converter slag, applied in recycling technology, manufacturing converters, abrasives, etc., can solve the problems of easy pollution of the environment and low comprehensive utilization efficiency

Active Publication Date: 2014-11-12
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of low comprehensive utilization efficiency of steelmaking converter slag and easy to pollute the environment in the prior art, and provide a method for comprehensively utilizing steelmaking converter wind-quenched slag. The present invention uses steelmaking converter slag as sandblasting The use of abrasives reduces the cost of sandblasting abrasives, the sandblasting effect is good, and the steelmaking converter slag can be used as a resource

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this embodiment, a method for comprehensively utilizing steel-making converter air quenching slag has the following specific steps:

[0045] Step 1: converter slag pretreatment,

[0046] (1) Preparation of flux

[0047] ①Weigh 45 kg of active lime, 33 kg of magnesia, Al 2 O 3 4 kg and Suzhou soil 2 kg, and the above components were added to the mixer in sequence, and the mixer was mixed for 25 min at a speed of 250 r / min. After mixing, the mixture A was prepared;

[0048] ②Secondly, take Fe according to mass parts 2 O 3 11 kg, 1 kg of MnO and 1 kg of salt; add the above components to the mixer of mixture A in turn, continue to mix and stir for 25 minutes, and prepare the co-solvent after uniform mixing;

[0049] (2) Slag pretreatment

[0050] At the end of steelmaking converter smelting, a flux is added to the converter to pre-treat the converter slag, among which: the amount of flux added is 2.5 kg / ton steel; the mass percentage of each composition of the converter slag after ...

Embodiment 2

[0074] In this embodiment, a method for comprehensively utilizing steel-making converter air quenching slag has the following specific steps:

[0075] Step 1: converter slag pretreatment,

[0076] (1) Preparation of flux

[0077] ①Weigh 50 kg of active lime, 35 kg of magnesia, Al 2 O 3 5 kg and 3 kg of Suzhou soil, add the above components to the mixer in turn, stir and mix for 30 min, the mixer speed is 250 r / min, and mix well to prepare mixture A;

[0078] ②Secondly, take Fe according to mass parts 2 O 3 12 kg, MnO2 kg and table salt 2 kg; add the above components to the mixer of mixture A in turn, continue to mix and stir for 25 minutes, and prepare the cosolvent after uniform mixing;

[0079] (2) Slag pretreatment

[0080] At the end of steelmaking converter smelting, a flux is added to the converter to pre-treat the converter slag, among which: the amount of flux added is 3 kg / ton steel; the mass percentage of each component of the converter slag after pretreatment adjustment is: Al...

Embodiment 3

[0104] In this embodiment, a method for comprehensively utilizing steel-making converter air quenching slag has the following specific steps:

[0105] Step 1: converter slag pretreatment,

[0106] (1) Preparation of flux

[0107] ①Weigh 40 kg of active lime, 30 kg of magnesia, Al 2 O 3 2 kg and Suzhou soil 1 kg, and the above components were added to the mixer in turn, stirred and mixed for 20 minutes, the mixer speed was 250 r / min, and mixed evenly to prepare mixture A;

[0108] ②Secondly, take Fe according to mass parts 2 O 3 10 kg, 1 kg of MnO and 1 kg of salt; add the above components to the mixer of mixture A in sequence, continue to mix and stir for 25 minutes, and prepare the co-solvent after uniform mixing;

[0109] (2) Slag pretreatment

[0110] At the end of steelmaking converter smelting, a flux is added to the converter to pretreat the converter slag, among which: the amount of flux added is 2-3 kg / ton steel; the mass percentage of each composition of the converter slag after...

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Abstract

The invention discloses a method for comprehensively utilizing air quenched slag of a steel converter and belongs to the technical field of comprehensive use of converter slag. The method for comprehensively utilizing the air quenched slag of the steel converter includes the steps that first, the converter slag is preprocessed; second, the converter slag is subjected to thermal refining; third, the slag is subjected to air quenching; fourth, the converter slag is screened; fifth, sand blasting is performed. According to the method, the converter slag is preprocessed and subjected to thermal refining and then subjected to air quenching, and the humidity and the ratio air volume of air are strictly controlled so that the air quenched converter slag can meet the requirement for sand-blasting abrasive, sand-blasting abrasive cost is reduced, a special sand blasting system is adopted in the sand blasting process, and the sand blasting effect is good; the surface smoothness of workpieces processed through the converter air quenched slag is larger than Sa2.5, and the industrial coating requirement is met.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of converter slag, and more specifically relates to a method for comprehensive utilization of wind-quenched steelmaking converter slag. Background technique [0002] Converter steelmaking uses molten iron, scrap steel, and ferroalloy as the main raw materials. The steelmaking process is completed in the converter by the physical heat of the molten iron itself and the heat generated by the chemical reaction between the components of the molten iron without the aid of external energy. Due to the fast speed of converter steelmaking, negative energy steelmaking and energy saving, converter steelmaking has become the mainstream of contemporary steelmaking. While promoting social progress, converter steelmaking also produces a series of environmental pollution. In the process of converter steelmaking, a large amount of steelmaking converter slag is produced every year. The composition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36C21B3/06B24C11/00
CPCY02W30/50
Inventor 饶磊陈广言周晨辉马孟臣张耀辉王钦
Owner MAGANG (GROUP) HOLDING CO LTD
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