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

Magnesium-based composite deoxidation alloy and steelmaking deoxidation method

A composite deoxidation and deoxidation alloy technology, applied in the field of steelmaking deoxidation, can solve the problems of high steelmaking cost, low utilization rate, molten steel pollution, etc., and achieve the effect of improving the quality of molten steel, improving the quality of molten steel, and strong desulfurization capacity

Active Publication Date: 2015-12-30
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some problems in deoxidation with aluminum: the density of aluminum is small, which causes serious burning loss of aluminum in molten steel, and the utilization rate is low; after deoxidation of aluminum, A1 with high melting point is generated. 2 o 3 Inclusions cause nodules in the continuous casting nozzle, resulting in interruption of continuous casting; A1 produced by aluminum deoxidation 2 o 3 Once the inclusions remain in the steel, it will have a negative impact on the transverse mechanical properties of the steel; aluminum resources are increasingly scarce, resulting in high aluminum prices, which will increase the cost of steelmaking
However, calcium treatment technology also brings some disadvantages: Improper calcium treatment can easily accelerate the erosion rate of the nozzle and cause molten steel pollution; calcium aluminate has a low melting point and is easy to gather, grow, and get rid of Large-grained inclusions; calcium aluminate inclusions usually do not deform after rolling, that is, they become point-like inclusions

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

example 1

[0022] In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 25% Al, 50% Mg, 19% Ca, 5% Ba, and the rest is Fe and impurities with a content of no more than 0.5%.

[0023] Break the deoxidized alloy into alloy blocks with a particle size of about 70-90 mm. During the tapping process of the above molten steel, add 4 kg / tFe alloy blocks into the ladle after 30 seconds of tapping to deoxidize the molten steel and remove inclusions. Make modifications.

[0024] After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 182ppm, and the desulfurization rate is 23%.

example 2

[0026] In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 10% Al, 70% Mg, 10% Ca, 1% Ba, and the rest is Fe and impurities with a content of no more than 1%.

[0027] The deoxidized alloy is crushed into particles with a particle size of about 3-4mm, and cored wire is made into cored wire through core wrapping operation. After tapping is completed, 3kg / tFe cored wire is added to molten steel through a wire feeder. The liquid is deoxidized and the inclusions are modified.

[0028] After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 174ppm, and the desulfurization rate is 26%.

example 3

[0030] In this example, the composition of the magnesium-based composite deoxidized alloy is calculated by weight percentage: 23% Al, 60% Mg, 16% Ca, and 4% Ba, and the rest is Fe and impurities with a content not exceeding 0.6%.

[0031] Break the deoxidized alloy into alloy blocks with a particle size of about 70-90 mm. During the tapping process of the above molten steel, add 3.6 kg / tFe alloy blocks into the ladle after 30 seconds of tapping to deoxidize the molten steel and eliminate inclusions. substances are modified.

[0032]After testing, after the deoxidation treatment in this example, the oxygen content in the molten steel is 166ppm, and the desulfurization rate is 28%.

[0033] The advantages of the deoxidation alloy for steelmaking and the deoxidation method of the present invention include: it can deoxidize molten steel while having a strong desulfurization ability, for example, after deoxidation, the oxygen content can reach below 185ppm, and the desulfurization ...

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
Login to View More

Abstract

The invention provides a magnesium-based deoxidized alloy and a steelmaking deoxidization method. The magnesium-based deoxidized alloy comprises the following ingredients in percentage by weight: 10%-25% of Al, 45%-70% of Mg, 10%-25% of Ca, 1%-5% of Ba, and the balance of Fe and other inevitable impurities. The steelmaking deoxidization method comprises the step of deoxidizing the molten steel by adopting the magnesium-based deoxidized alloy. The magnesium-based deoxidized alloy and the steelmaking deoxidization method have the beneficial effects of having stronger desulfurization capability while the molten steel is deoxidized, converting the majority of entrained impurities in the deoxidized molten steel into composite entrained impurities, and further effectively enhancing the quality of the molten steel.

Description

technical field [0001] The invention belongs to the technical field of steelmaking deoxidation, and specifically relates to a magnesium-based composite deoxidation alloy and a steelmaking deoxidation method using the deoxidation alloy. Background technique [0002] Usually, in the steelmaking process, deoxidation is the process of using deoxidizing elements to reduce the oxygen content of molten steel, including the deoxidation reaction between deoxidizing elements with strong affinity for oxygen and oxygen, and the floating and removal of deoxidized products generated during the reaction. The level of oxygen content in steel directly affects the quality and performance of the final steel. High oxygen content will lead to the segregation and concentration of carbon and oxygen in the process of molten steel condensation, which will cause carbon to oxidize again, causing bubbles in the steel, which will affect the quality of the steel; in addition, oxygen will also form FeO, F...

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): C21C7/06C21C7/064C22C23/00C22C23/02C22C30/00
Inventor 王建陈炼陈永戈文荪李龙曾建华蒋龙奎杨森祥杜利华
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD