Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Positive pressure strong nozzle for molten steel transfer

A molten steel and pressure technology, which is applied in the field of metallurgy, can solve problems such as slag protrusion, lower molten steel quality, and unusable residual steel, and achieve the effects of reducing processing costs, improving molten steel quality, and improving steelmaking production efficiency

Active Publication Date: 2020-10-13
万恩同
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For some high-grade steel types, steel mills often adopt the method of sacrificing the yield of molten steel and closing the nozzle in advance, resulting in a large amount of residual steel in the converter, ladle, and tundish that cannot be used; In this case, the steel slag is allowed to mix into the molten steel, although the yield of molten steel is improved, but the quality of molten steel is reduced
[0005] However, as the pace of steel production accelerates, the transfer speed of molten steel also accelerates. It is necessary to increase the diameter of various nozzles, which leads to more prominent problems of slag discharge.

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
  • Positive pressure strong nozzle for molten steel transfer
  • Positive pressure strong nozzle for molten steel transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: A positive pressure strong nozzle, R1=20mm, R2=30mm, L=150mm, three slope-shaped diversion grooves 3, evenly distributed around the molten steel convergence area 1; D1=120mm, D2=60mm, H1= 60mm, D3=40mm, H2=250mm, D4=35mm, H3=20mm, H4=20mm, the exhaustion time is 23s, the critical height of the vortex is about 30mm, and the tapered transition section 2 is from top to bottom 1 / 4, 1 / Drill three small holes at the 2nd and 3 / 4th places. When the valve is opened, it can be seen that the water flows out from the small holes, and the water flow ranges in turn. It shows that the water flow produces a positive pressure, and the positive pressure at the lower part of the nozzle is greater;

Embodiment 2

[0062] Embodiment 2: A positive pressure strong nozzle, R1=20mm, R2=40mm, L=150mm, three slope diversion grooves 3, evenly distributed around the molten steel convergence area 1, D1=200mm, D2=70mm, H1= 80mm, D3=50mm, H2=350mm, D4=40mm, H3=20mm, H4=20mm, exhaustion time 21s, vortex critical height<40mm, vortex intensity is weak, stream is regular flow, weak impact on the next container, The sound is small, and the number of bubbles entering the water is large and small;

Embodiment 3

[0063] Embodiment 3: A positive pressure strong nozzle, R1=20mm, R2=40mm, L=150mm, three slope diversion grooves 3, evenly distributed around the molten steel convergence area 1, D1=240mm, D2=70mm, H1= 80mm, D3=50mm, H2=400mm, D4=40mm, H3=20mm, H4=150mm, exhaustion time 18s, vortex critical height<40mm, slightly larger than Example 2, vortex intensity is weak, stream is regular flow, The impact on the next container is weak, the sound is small, and the number of bubbles entering the water is large and small.

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
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of metallurgy, and discloses a positive pressure strong nozzle for molten steel transfer. The positive pressure strong nozzle comprises a molten steel gathering area and a conical transition section which are sequentially arranged in a sealed mode in the molten steel flowing direction, and the molten steel gathering area and the conical transition section are in a big-end-up hollow inverted circular truncated cone shape. The positive pressure strong nozzle further comprises one to four slope-shaped flow guide grooves, the slope-shaped flow guide grooves are of a transverse semicircular truncated cone structure, the ends, with relatively large depth, of the slope-shaped flow guide grooves communicate with the molten steel gathering area, the upper surfaces of the slope-shaped flow guide grooves are flush with the upper surface of the molten steel gathering area, the slope-shaped flow guide grooves take a line which passes through the center of the molten steel gathering area in the incoming flow direction as a symmetry axis, and the slope-shaped flow guide grooves are symmetrically distributed around the molten steel gathering area. According to the positive pressure strong nozzle for molten steel transfer, the vortex critical height is reduced, the amount of steel slag involved in molten steel is greatly reduced, the quality of the molten steel is improved, the yield of the molten steel is increased, and the refining treatment cost of the molten steel is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a positive pressure nozzle for transferring molten steel. Background technique [0002] In steel production, molten steel is continuously transferred from one container to another, and each container has corresponding slag due to the needs of smelting: there is steel slag in the converter, ladle slag in the ladle, and tundish slag in the tundish. In order to avoid affecting the steel production process and steel quality, it is necessary to minimize the flow of slag into the next container. [0003] The reason why the slag is transferred with the molten steel through the nozzle is due to the vortex phenomenon in the liquid flow. The vortex is a common phenomenon in our life, which is caused by the inconsistency of the flow velocity between adjacent particles during the flow of the fluid. Above the vertical nozzle, when the liquid reaches a certain critical height, a visible v...

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): B22D41/50C21C5/46
CPCB22D41/50C21C5/4653
Inventor 万恩同饶江平万杨知为李慕耘冯军
Owner 万恩同
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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