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A mass application method of hot stewed steel slag

An application method and a bulk technology, applied in the field of industrial waste slag bulk utilization, can solve problems such as difficulty in the application of steel slag bulk

Active Publication Date: 2021-10-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the mass application of steel slag is very difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for mass application of thermally stewed steel slag, comprising the following steps:

[0024] (1) Classify the hot stewed steel slag, and divide it into -50 mesh, 5-50 mesh, and +5 mesh three kinds of grain grades;

[0025] (2) Carry out conventional crushing, grinding and magnetic separation respectively to the steel slag of three kinds of particle sizes, and the particle average particle size of grinding is 18 microns;

[0026] (3) -50 mesh hot stewed steel slag is directly applied after grinding and magnetic separation; 5-50 mesh hot stewed steel slag is ground and magnetically separated, then steamed at 100°C for 1 hour, and then applied after drying; +5 mesh hot stewed steel slag After grinding and magnetic separation, it is steamed at 100°C for 1.5 hours, dried and used. The steam-treated steel slag powder needs to be dried at 50-90°C.

[0027] (4) Mix the treated steel slag powder and slag powder according to the weight ratio of 2:1, then add semi-dry ...

Embodiment 2

[0030] A method for mass application of thermally stewed steel slag, comprising the following steps:

[0031] (1) Classify the hot stewed steel slag into three grades: -50 mesh, 5-50 mesh, and +5 mesh.

[0032] (2) The steel slags of three particle sizes are subjected to conventional crushing, grinding and magnetic separation respectively. The average particle size of the pulverized particles is 18 microns.

[0033] (3) -50 mesh hot stewed steel slag is directly applied after grinding and magnetic separation; 5-50 mesh hot stewed steel slag is ground and magnetically separated, then steamed at 100°C for 1 hour, and then applied after drying; +5 mesh hot stewed steel slag After grinding and magnetic separation, it is steamed at 100°C for 1.5 hours, dried and used. The steam-treated steel slag powder needs to be dried at 50-90°C.

[0034] (4) Mix the treated steel slag powder and slag powder according to the weight ratio of 4:1, then add semi-dry desulfurization ash according...

Embodiment 3

[0037] A method for mass application of thermally stewed steel slag, comprising the following steps:

[0038] (1) Classify the hot stewed steel slag into three grades: -50 mesh, 5-50 mesh, and +5 mesh.

[0039] (2) The steel slags of three particle sizes are subjected to conventional crushing, grinding and magnetic separation respectively. The average particle size of the pulverized particles is 18 microns.

[0040] (3) -50 mesh hot stewed steel slag is directly applied after grinding and magnetic separation; 5-50 mesh hot stewed steel slag is ground and magnetically separated, then steamed at 100°C for 1 hour, and then applied after drying; +5 mesh hot stewed steel slag After grinding and magnetic separation, it is steamed at 100°C for 1.5 hours, dried and used. The steam-treated steel slag powder needs to be dried at 50-90°C.

[0041] (4) Mix the treated steel slag powder and slag powder according to the weight ratio of 5:1, then add semi-dry desulfurization ash according...

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Abstract

The invention provides a mass application method of hot stewed steel slag, which relates to the technical field of mass utilization of industrial waste slag. The hot stewed steel slag is subjected to treatment methods such as classification, crushing and grinding, magnetic separation, and digestion, and then the processed Steel slag is compounded with other metallurgical slags, shaped and heat treated to obtain wall materials or aggregates in building materials with a certain strength, which makes hot-braised steel slags widely used.

Description

technical field [0001] The invention relates to the technical field of mass utilization of industrial waste slag, in particular to a mass application method of hot stewed steel slag. Background technique [0002] Steel slag is a by-product produced in the steelmaking process, and hot-steamed steel slag accounts for about 50% of the total steel slag. The most critical factor for the comprehensive utilization of steel slag is the stability of steel slag. There are many reasons for affecting the stability, the main reason being the hydration of free calcium oxide. Hydration of free calcium oxide produces Ca(OH) 2 , the volume increases by 98%, which causes internal stress in the steel slag, and the internal stress increases with the increase of free CaO content. When it exceeds the binding force of the steel slag itself, it will cause the steel slag to crack or even pulverize. Since the calcium oxide in the steel slag has been calcined at a high temperature of about 1700°C, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/02
CPCC04B18/02C04B18/142C04B18/141C04B18/062
Inventor 郑翠红林娜檀杰申星梅冒爱琴俞海云方道来
Owner ANHUI UNIVERSITY OF TECHNOLOGY