AOD+VOD duplex smelting process and device for low-carbon ferrochrome

A ferrochrome, low-level technology, applied in the field of smelting ferrochrome, can solve the problems of cost increase, power consumption, etc., achieve the effects of reducing inclusions, improving quality, and solving technical defects

Active Publication Date: 2018-09-07
CHENGDU HAOSHENG STEEL +1
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the smelting of Si-Cr alloys consumes a lot of electric energy, if ferrochrome cannot be charged with hot water, it will consume more electricity and increase the cost. At present,

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
  • AOD+VOD duplex smelting process and device for low-carbon ferrochrome

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0024] like figure 1 As shown, it includes an argon-oxygen converter 1, a feeding device and a gas collection hood 7. The bottom of the argon-oxygen converter 1 is provided with a bottom blowing oxygen lance 2, and the furnace mouth of the upper furnace body 10 of the argon-oxygen converter 1 is provided with a gas-collecting Cover 7, gas collection cover 7 is connected with environmental protection equipment, top-blown oxy...

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
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses an AOD+VOD duplex smelting process and device for low-carbon ferrochrome. The device comprises a movable AOD argon-oxygen converter with a top oxygen lance, wherein a bottom (side) oxygen lance is arranged at the bottom of the argon-oxygen converter, the top oxygen lance, a gas collecting hood and a feeding device are arranged above the argon-oxygen converter, a vacuum hoodis arranged above a VOD vacuum station, the vacuum hood is connected with a vacuumizing device, and a feeding device is arranged at the upper end of a furnace opening. A process of AOD+VOD duplex smelting of low-carbon ferrochrome comprises a molten ferrochrome preparation process, a rapid decarburization AOD refining process, a cooling process by adding a cooling material, a vacuum negative pressure bottom oxygen decarburization VOD refining process, a vacuum negative pressure carbon deoxidation refining process, a reduction refining process and a detection and warehousing process. Accordingto the process provided by the invention, a new process of hot charging of molten ferrochrome is adopted, and oxygen, nitrogen or argon, and a mixed gas of nitrogen and oxygen or argon and oxygen areblown in through special refining equipment to directly smelt low-carbon ferrochrome; and the process has the advantages of short smelting period, no power consumption, good product quality, less impurities, energy conservation, environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of smelting ferrochrome, in particular to a process and a device for smelting low-micro-ferrochrome in combination with AOD+VOD. Background technique [0002] Chromium is one of the important alloying elements in steel materials. Chromium can change the strength, hardness, wear resistance and heat resistance of steel materials and other properties. Important alloy raw materials for castings. [0003] Production of low-carbon ferrochrome At present, Si-Cr alloy plus chromium ore powder is widely used at home and abroad, and low-micro ferrochrome is produced through refining electric arc furnace. Since the smelting of Si~Cr alloys consumes a lot of electric energy, if ferrochrome cannot be charged with hot water, it will consume more electricity and increase the cost. At present, oxygen blowing and decarburization in converters are also used for refining. However, considering the serious oxidation of Cr, the ...

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): C21C7/00C21C7/068C21C7/10C22C35/00
CPCC21C7/0006C21C7/068C21C7/10C22C35/00
Inventor 景辉
Owner CHENGDU HAOSHENG STEEL
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