Composite type ladle top slag modifier and production method thereof

A ladle top slag and composite steel technology, applied in the direction of improving process efficiency, etc., can solve the problems of destroying steel continuity, blocking nozzles, disrupting production order, etc., and achieve the effect of improving surface quality

Inactive Publication Date: 2009-06-24
SHENYANG WANSHUI IND & TRADE
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the pouring process, the nozzle is blocked and the normal production order is disrupted
At the same time, impurities are also produced in the steel, which destroys the continuity of the steel, and causes quality problems during rolling and subsequent processing.

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

[0020] Choose lime with CaO content greater than 89% and sulfur content less than 0.01%, and mix CaO, Al, Si, Ca, SiO 2 , CaF 2 , Al 2 O 3 These deoxidized materials are crushed according to the ratio of 50:20:2:5:8:5:10 and mixed, and processed by a jaw crusher to 5-40mm; the particles smaller than 5mm are screened out, and the particles larger than 40mm are returned for processing ; Use the machine mixing method to mix the prepared materials evenly, pack them after mixing evenly, make small bags of 10kg each, and then seal them.

Embodiment 2

[0022] Choose lime with CaO content greater than 89% and sulfur content less than 0.01%, and mix CaO, Al, Si, Ca, SiO 2 , CaF 2 , Al 2 O 3 These deoxidized materials are crushed according to the ratio of 50:30:3:2:2:5:8 and then mixed, and processed by jaw crusher to 5-40mm; the particles smaller than 5mm are screened out, and the particles larger than 40mm are returned for processing ; Use the machine mixing method to mix the prepared materials evenly, pack them after mixing evenly, make small bags of 10kg each, and then seal them.

Embodiment 3

[0024] Choose lime with CaO content greater than 89% and sulfur content less than 0.01%, and mix CaO, Al, Si, Ca, SiO 2 , CaF 2 , Al 2 O 3 These deoxidized materials are crushed according to the ratio of 45:20:3:5:2:15:10 and then mixed, processed by jaw crusher to 5-40mm; the particles smaller than 5mm are screened out, and the particles larger than 40mm are returned for processing ; Use the machine mixing method to mix the prepared materials evenly, pack them after mixing evenly, make small bags of 10kg each, and then seal them.

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 discloses a composite ladle top slag modifier and a preparing method thereof. Deoxidation materials of Cao, Al, Si, Ca, SiO2, CaF2 and Al2O3 are ground and mixed evenly according to the proportion of 45-50 to 20-30 to 2-5 to 2-8 to 5-10 to 5-10 to 5-15 and packaged to obtain the composite ladle top slag modifier. The percentage of FeO in the ladle top slag is effectively lowered, which means the oxidizability of the slag is lowered, the top slag alkalinity is improved, the secondary oxidation of a slag-steel interface is lowered obviously, impurities in steel are reduced, the nozzle nodulation probability during the casting process is lowered and the number of furnace of sequence casting is increased. Covering flux is used for replacing the ladle top. Therefore, the smelting cost is saved effectively.

Description

technical field [0001] The invention relates to an RH (secondary metallurgy of molten steel) process for deep-drawn steel plates smelted by a converter, and in particular provides a composite ladle top slag modifier and a production method thereof. Background technique [0002] In the process of smelting deep-drawing steel plates in the converter, there are mainly four processes, namely: 1. Hot metal pretreatment: used for desulfurization and slag removal of molten iron; 2. Converter smelting: removing phosphorus, sulfur and Harmful gas and temperature rise to meet the target requirements of the first step of molten steel; 3RH (vacuum treatment): carry out secondary metallurgy on molten steel to further remove the carbon contained in the steel to the target requirements, and further remove the carbon contained in the steel Harmful gases [N], [H], [O]; 4 Continuous casting: Transform molten steel from liquid to solid to meet the physical shape requirements of rolling. [000...

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 Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 裴忠飞裴颜雪
Owner SHENYANG WANSHUI IND & TRADE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap