A kind of adding method of high-nitrogen chromium ferroalloy in the process of preparing cast steel
A ferrochrome alloy and high-nitrogen chromium technology, which is applied in the field of adding high-nitrogen ferrochromium, can solve the problems of low yield rate and increase alloy utilization rate, and achieve the effect of increasing the yield rate of nitrogen element
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0028] The amount of molten steel for smelting is 4.2t, and 50kg of high-nitrogen ferrochromium is added, of which 10kg is added to the bottom of the ladle with a particle size of ≤3mm, 15kg is added 5 minutes before tapping for 4-8mm, and 25kg is added 10 minutes before tapping for 9-50mm. After treatment, the N content increased from 0.0337% before treatment to 0.1157%, of which the content of high-nitrogen chromium, iron and nitrogen was 9.26%, and the N recovery rate was 74.41% according to the detection situation.
Embodiment 2
[0030] The amount of molten steel for smelting is 5.6t, and 60kg of high-nitrogen ferrochromium is added, of which 12kg is added to the bottom of the ladle with a particle size of ≤3mm, 30kg is added 7 minutes before tapping for 4-8mm, and 18kg is added 13 minutes before tapping for 9-50mm. After treatment, the N content increased from 0.0432% before treatment to 0.1214%, of which the high-nitrogen chromium iron nitrogen content was 9.58%, and the N recovery rate was calculated according to the detection situation to be 76.19%.
Embodiment 3
[0032] The amount of molten steel for smelting is 7.8t, and 150kg of high-nitrogen ferrochromium is added, of which 30kg is added to the bottom of the ladle with a particle size of ≤3mm, 75kg is added 7 minutes before tapping for 4-8mm, and 45kg is added 13 minutes before tapping for 9-50mm. After treatment, the N content increased from 0.0250% before treatment to 0.1765%, of which the high-nitrogen chromium iron nitrogen content was 9.35%, and the N recovery rate was 84.26% according to the detection situation.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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