Unlock instant, AI-driven research and patent intelligence for your innovation.
Deoxygenation slagging method for LF refining furnace
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A refining furnace and slag making technology, applied in the field of iron and steel metallurgy, can solve the problems of harsh working environment, physical injury of refining workers, and low accuracy of initial conditions for entering the station.
Active Publication Date: 2017-05-31
LAIWU STEEL YINSHAN SECTION CO LTD
View PDF7 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
When refining workers operate in front of the furnace, the high temperature, noise, and dust in front of the refining furnace have caused great physical harm to the refining workers, and the working environment is very harsh
The LF refining furnace slagging model developed by domestic predecessors requires refining workers to judge the slag amount and slag oxidation of the converter based on experience, and then manually input it into the slagging model. The feeding data of the process, and the initial conditions of the entry station are difficult to observe by naked eyes, resulting in low accuracy of the input initial conditions of the entry station
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0061] Such as figure 1 Shown, a kind of deoxidation slagging method of LF refining furnace, described method comprises the following steps:
[0062] 1) Calculation of the percentage content of FeO in converter slag:
[0063] Oxygen concentration in molten steel detected by converter sub-lance at the end of blowing a [O] To calculate the percentage content of FeO in converter slag, the specific calculation process is as follows:
[0064] The oxidation reaction of converter molten steel is expressed by the following formula ①: FeO in converter slag and molten steel a [O] The balance equation for is:
[0065] [Fe]+[O]=(FeO) ①
[0066] The balanced formula of this formula can be expressed as the following formula ②:
[0067] K FeO =a FeO / (a [Fe] ×a [O] ) ②
[0068] Due to the converter molten steel a [O] = 1,K FeO is a fixed value, so ideally a FeO with a [O] Proportional to, due to the converter slag a FeO The value is small, and according to Raoult's law, the co...
Embodiment 2
[0119] Such as figure 1 Shown, a kind of deoxidation slagging method of LF refining furnace, described method comprises the following steps:
[0120] 1) Calculation of the percentage content of FeO in converter slag:
[0121] Oxygen concentration in molten steel detected by converter sub-lance at the end of blowing a [O] To calculate the percentage content of FeO in converter slag, the specific calculation process is as follows:
[0122] The oxidation reaction of converter molten steel is expressed by the following formula ①: FeO in converter slag and molten steel a [O] The balance equation for is:
[0123] [Fe]+[O]=(FeO) ①
[0124] The balanced formula of this formula can be expressed as the following formula ②:
[0125] K FeO =a FeO / (a [Fe] ×a [O] ) ②
[0126] Due to the converter molten steel a [O] = 1,K FeO is a fixed value, so ideally a FeO with a [O] Proportional to, due to the converter slag a FeO The value is small, and according to Raoult's law, the co...
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
Login to View More
Abstract
The invention discloses a deoxygenation slagging method for an LF refining furnace. The method includes the following steps that an LF refining furnace slagging model is established, the slagging model reads converter data online, and station getting-in initial conditions such as the oxidability, the slag amount and components of station getting-in furnace slag are calculated according to converter smelting data, feeding data in the converter tapping process and the content of acid-soluble aluminum in molten steel detected at the moment an LF furnace steel ladle gets in a station; the adding amount of deoxidizing agents is determined according to the oxidability of the station getting-in furnace slag; and the adding number of slagging materials is determined according to target slag system components and station getting-in furnace slag components.
Description
technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular, the invention relates to a deoxidation and slagging method for an LF refining furnace. Background technique [0002] At present, the slagging process of the domestic LF refining furnace workshop is mainly based on the on-site workers' own production experience to determine the amount and method of adding slag-making materials. There is no fixed operating procedure to follow, which leads to thinner slag and erosion of refractory materials in individual furnaces. Severe problems such as blockage of the nozzle in the continuous casting process and unstable inclusion content in the steel. At present, this kind of empirical refining method requires refining workers to have rich production experience. During the refining process, refining workers need to dip slag frequently with iron rods to observe the color and fluidity of the slag, and use this to determine the refin...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More