Unlock instant, AI-driven research and patent intelligence for your innovation.

Intermediate for refining aluminum oxide impurities in steel as well as preparation method and use method thereof

An intermediate, alumina technology, applied in the field of iron and steel metallurgy, can solve the problems of low bulk density, low yield, large specific surface area of ​​nanoparticles, etc., and achieves the effects of low cost, simple process and avoiding energy loss

Active Publication Date: 2014-09-03
ANGANG STEEL CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of large specific surface area, high activity, easy agglomeration, and low bulk density of nanoparticles, it is difficult to avoid nano-Al in the pre-dispersion process. 2 o 3 reunion happens
In addition, due to Al at 1823K 2 o 3 The contact angle with molten steel is as high as 141°, obviously nano-Al 2 o 3 It is difficult to enter into molten steel, therefore, the nano-Al of this method 2 o 3 lower yield
Therefore, there is no industrial application report

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Intermediate for refining aluminum oxide impurities in steel as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 120 mesh iron powder, aluminum powder and ferric oxide powder according to the mass ratio, wherein the proportion of aluminum powder is 10% of the total weight, the proportion of ferric oxide powder is 30% of the total weight, and the rest is iron powder. The raw material powders were mechanically mixed in a blender for 2 hours, and then 3% of the total mass of zinc stearate was added to bind the powders together. Put the mixture into the mold and press it into an intermediate blank with a size of Φ30×10mm, and the pressing pressure is 40MPa. The intermediate blank is degreased in the degreasing tank to remove the binder medium. The extraction medium is CCl 4 , the extraction time is 1 hour, the intermediate is dried for 1 hour after leaving the tank, and is set aside.

[0034] The intermediate addition test was carried out in the resistance furnace, 1000g steel material was put into the furnace, and then the temperature was raised, the temperature of the molten...

Embodiment 2

[0037] Weigh 200 mesh iron powder, aluminum powder and ferric oxide powder according to the mass ratio, wherein the proportion of aluminum powder is 18% of the total weight, the proportion of ferric oxide powder is 50% of the total weight, and the rest is iron powder. The raw material powders were mechanically mixed in a blender for 2.5 hours, and then 4% of the total mass of zinc stearate was added to bind the powders together. Put the mixture into the mold and press it into an intermediate blank with a size of Φ30×10mm, and the pressing pressure is 60MPa. The intermediate blank is degreased in the degreasing tank to remove the binder medium. The extraction medium is CCl 4 , the extraction time is 2 hours, and the intermediate is dried for 2.5 hours after being out of the tank for use.

[0038] The intermediate addition test was carried out in a 50kg induction furnace. 50kg of steel material was put into the furnace, and then the temperature was raised. The temperature of t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an intermediate for refining aluminum oxide impurities in steel, a preparation method and a use method thereof. The intermediate comprises the following components by weight percent: 30%-50% of ferric oxide powder, 10%-20% of aluminum powder and the balance of iron powder, wherein the grain size of the powder is 120 meshes-400 meshes. The preparation method comprises the following steps: adding a binding agent into the uniformly mixed powder, wherein the weight of the binding agent is 2%-4% of the weight of the powder; forming under a pressure of 40Mpa-60Mpa; performing degreasing treatment on a formed body and then drying for 1.5-4 hours at a roasting temperature of 120-600 DEG C; adding the intermediate into molten steel at the moment of being 2-5 minutes earlier than the moment of deoxidizing the molten steel by adding aluminum, wherein the weight of the intermediate is 0.1%-0.5% of the weight of the molten steel; and casting the molten steel and solidifying, thereby acquiring the aluminum oxide impurities with an average grain size of being below 1.5 mu m in a solidifying tissue. The preparation method has the advantages that the process is simple, the cost is low, the stable yield of aluminum oxide grains in the steel is ensured and the mechanical property and the surface quality of the steel are improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to an intermediate for refining aluminum oxide inclusions in steel and a use method. Background technique [0002] With the development of modern engineering technology, the quality requirements for steel materials are becoming stricter and more diversified, so there is a strong desire to develop steel with better characteristics. Coarse inclusions in steel, especially aluminum oxide inclusions with high melting point and high hardness, are one of the main factors affecting the properties of steel. With the development of metallurgical technology, the cleanliness of steel has been continuously improved. Inclusions in steel The size gradually presents a trend of ultra-fineness. [0003] As we all know, at present, in order to reduce the oxygen content in steel, aluminum final deoxidation is almost always used in steelmaking. Since there are not a large ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/02
Inventor 尚德礼李德刚廖相巍吕春风于广文康磊
Owner ANGANG STEEL CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com