Steel slag recycling technology

A steel slag recovery and steel slag technology, applied in the field of iron and steel smelting, can solve the problem of low overall utilization efficiency and achieve the effects of excellent hydration resistance and high iron recovery rate

Inactive Publication Date: 2019-04-26
JINGYE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall utilization efficiency in our country is not high, and the methods of use and recycling need to be further developed and researched

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A steel slag recycling process, the method steps are:

[0026] (1) The converter smelting Ti-containing high-strength steel slag is collected, and the steel slag composition is CaO 48wt%, SiO2 30wt%, MgO 7wt%, Al2O3 3wt%, Fe3O4 6wt%, FeO 1wt%, Fe2O3 1wt%, MnO 0.5wt%, TiO 20.5wt%, other compounds ≤ 3wt%, recorded as steel slag 1; the collected steel slag is stored in a storage tank, and the storage tank is cooled by water injection;

[0027] (2) Steel slag 1 after cooling out of the furnace is poured into 200mm×200mm sieve plate, steel slag 200mm is first magnetically separated by iron remover and permanent magnet drum before entering the crusher Crushing, the particle size after crushing is less than 50mm; after that, the steel slag is sent to the vibrating screen through the belt for screening, and the steel slag with a particle size of less than 20mm after sieving enters the wet ball mill for grinding. After grinding, the particle size is 300 meshes, accounting for 65...

Embodiment 2

[0032] A steel slag recycling process, the method steps are:

[0033] (1) The converter smelting Ti-containing high-strength steel slag is collected, and the steel slag composition is CaO 49wt%, SiO2 28wt%, MgO 9wt%, Al2O3 3wt%, Fe3O4 6wt%, FeO 1wt%, Fe2O3 1wt%, MnO 0.5wt%, TiO 20.5wt%, other compounds ≤ 3wt%, recorded as steel slag 1; the collected steel slag is stored in a storage tank, and the storage tank is cooled by water injection;

[0034] (2) Steel slag 1 after cooling out of the furnace is poured into 200mm×200mm sieve plate, steel slag 200mm is first magnetically separated by iron remover and permanent magnet drum before entering the crusher Crushing, the particle size after crushing is less than 50mm; after that, the steel slag is sent to the vibrating screen through the belt for screening, and the steel slag with a particle size of less than 20mm after sieving enters the wet ball mill for grinding. After grinding, the particle size is 300 meshes, accounting for 65...

Embodiment 3

[0039] A steel slag recycling process, the method steps are:

[0040] (1) Collect the steel slag from converter smelting Ti-containing high-strength steel, the steel slag composition is CaO 45wt%, SiO2 25wt%, MgO 10wt%, Al2O3 5wt%, Fe3O4 8wt%, FeO 1.5wt%, Fe2O3 1.5wt%, MnO 0.5wt% %, TiO20.5wt%, and other compounds ≤ 3wt%, recorded as steel slag 1; the collected steel slag is stored in a storage tank, and the storage tank is cooled by water injection;

[0041] (2) Steel slag 1 after cooling out of the furnace is poured into 200mm×200mm sieve plate, steel slag 200mm is first magnetically separated by iron remover and permanent magnet drum before entering the crusher Crushing, the particle size after crushing is less than 50mm; after that, the steel slag is sent to the vibrating screen through the belt for screening, and the steel slag with a particle size of less than 20mm after sieving enters the wet ball mill for grinding. After grinding, the particle size is 300 meshes, accou...

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Abstract

The invention discloses a steel slag recycling technology. The steel slag recycling technology comprises the steps that firstly, steel slag is collected; secondly, magnetic separation is conducted oniron-containing raw materials; thirdly, air is introduced to achieve roasting for adjusting components; and lastly, roasted steel slag is used for preparing a refractory material.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a steel slag recycling process. Background technique [0002] The iron and steel industry consumes a large amount of material resources and energy, and produces a large amount of solid waste. Metallurgical slag is the main solid waste in the iron and steel industry. Although there are already a series of slag utilization technologies, which can recycle the slag, to a certain extent, it has solved the outlet of the slag and the comprehensive utilization of resources, and has also achieved certain economic and social benefits. [0003] In the early 1970s, the steel slag in the United States had reached a balance of discharge and use, realizing the utilization, specialization, and commercialization of steel slag utilization, and the historical steel slag piles have been basically eliminated. The latest statistics show that since 2005, the output of steel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C04B5/00
CPCC04B5/00C22B7/04Y02P10/20
Inventor 杨海西樊利智曹晓运刘艳飞
Owner JINGYE STEEL CO LTD
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