Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Aluminum-calcium deoxidizing agent and preparation method thereof

A deoxidizer, aluminum-calcium technology, applied in the field of metallurgy, can solve the problems of high cost of CaSi alloy wire, low utilization rate of calcium wire, increase of Si in molten steel, etc., to achieve the effect of fast floating, high strength of finished product, and reduced inclusion content

Inactive Publication Date: 2010-12-08
上海盛宝冶金科技有限公司
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization rate of calcium wire is low and the cost is high, and the cost of CaSi alloy wire is also high and will cause Si increase in molten steel.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: (Table 1)

[0013] Raw material components

Particle size (mm)

%(weight)

Metal Aluminum Powder

0~2

40

Calcium metal powder

0~2

8

Premelted Calcium Aluminate Powder

0~2

52

[0014] After the raw materials are pressed into balls according to the above components and particle sizes, the ball forming rate reaches 98%, and 98% of the balls fall freely on the cement floor from a height of 2m and are larger than 10mm. The appearance is smooth and the finish is high.

[0015] (Table 2)

[0016] Raw material components

Particle size (mm)

%(weight)

Metal Aluminum Powder

0~4

40

Calcium metal powder

0~4

8

Premelted Calcium Aluminate Powder

0~4

52

[0017] After the raw materials are pressed into balls according to the above-mentioned components and particle sizes, the ball forming rate reaches 96%, and 97% of them fall freely on the cement floo...

Embodiment 2

[0026] After the above components are pressed into balls, they are used for deoxidation when tapping the converter. They are used in the smelting of AFT011 steel in a steel factory. After adding 2.5kg / t molten steel, the obtained results are as follows:

[0027] Oxygen 22ppm before argon after addition. Compared with the original deoxidizer, the oxygen content in molten steel is reduced by 6ppm. The on-site environment is pollution-free. The fluidity of molten steel is good, and there is no nodule in the nozzle.

Embodiment 3

34

[0031] After the above components are pressed into balls, they are used for deoxidation when tapping the converter. They are used in the smelting of AFT011 steel in a steel factory. After adding 2.5kg / t molten steel, the obtained results are as follows:

[0032] After the addition of argon and before oxygen 20ppm. Compared with the original deoxidizer, the oxygen content in molten steel is reduced by 8ppm. The on-site environment is pollution-free. The fluidity of molten steel is good, and there is no nodule in the nozzle.

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

No PUM Login to View More

Abstract

The invention relates to the technical field of metallurgy, in particular to an aluminum-calcium deoxidizing agent and a preparation method thereof. The deoxidizing agent is a ball-shaped composition prepared from powder of aluminum powder, calcium powder, premelting calcium aluminate powder and the like. By virtue of the components as well as shapes and sizes thereof and balled shapes of the composition, in the using process, the deoxidizing agent has the advantages that the calcium powder, the calcium powder and the premelting calcium aluminate powder are pressed into balls, and the preparation method is simple; the strength of a finished product is high, and the finished product can be directly used by the overhead bin of a steel factory; the reduction capability is high, the deoxidizing capability on molten steel is strong, and the total oxygen content of the molten steel is low when compared with the same type of deoxidizing agents; a deoxidizing product grows by mutual accumulation, and quickly floats up, the content of inclusion in the steel is reduced, and the inclusion is modified simultaneously; and the flowability of molten steel is good when in casting.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to pressing metal aluminum powder, metal calcium powder and pre-melted calcium aluminate powder into balls. It is added in the tapping process of converter and electric furnace or in the refining process of RH and LF to deoxidize molten steel. Background technique [0002] Metal aluminum as a deep deoxidizer has been widely used in converter or electric furnace smelting and tapping, and its good deoxidation performance has been recognized by everyone. At present, aluminum deoxidizers used include metal aluminum ingots, aluminum iron, etc. Produced Al 2 o 3 A large number of solid inclusions will exist in the molten steel and are not easy to float up. If they are not removed in the subsequent smelting process, it will not only cause nodules in the nozzle during continuous casting, but also reduce the mechanical properties and machinability of the finished steel. In order to elimi...

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
IPC IPC(8): C21C7/06B22F1/00B22F3/02
Inventor 刘欣隆孙树森周四明
Owner 上海盛宝冶金科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com