Method for eliminating flocculating flow blocking of upper nozzle of tundish

A tundish and nozzle technology, which is used in casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problems of power consumption and alloy costs, cost waste, easy flocculation of nozzles, etc., to ensure internal and external quality, The effect of eliminating equipment damage and recovering production costs

Inactive Publication Date: 2016-09-14
SHANDONG IRON & STEEL CO LTD
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the continuous casting production process, due to improper treatment of molten steel in individual furnaces, excessive oxidation of molten steel, and too many inclusions, the nozzle is easily blocked by flocculation. Pulling speed limit, in order to protect equipment and prevent accidents from expanding, post workers generally choose to stop
[0003] The main problems of this approach are: 1. Shutdown accidents disrupted the original production plan, resulting in

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

Example Embodiment

[0017] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0018] The invention provides a method for eliminating the flocculation blockage of the upper nozzle of the tundish, comprising the following steps:

[0019] 1) Confirm that the ready-to-use tools are fully prepared, including: baffle boards, baffle iron sheets, tools for measuring the depth of the liquid level, slag scooping spoons, slag scooping basins, oxygen-burning hoses, oxygen-burning rubber hoses, asbestos sticks and cutting handles;

[0020] Ensure that the molten steel from the next furnace arrives at the station, control the temperature of the molten steel in the tundish above 1550°C, the time when the casting spee...

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 method for eliminating flocculating flow blocking of an upper nozzle of a tundish. After replacement of a submersed nozzle in a flocculating flow state is invalid, a casting blank is pulled to a fast replacement position, a stopper rod is temporally closed to interrupt casting, a half submersed nozzle is used for replacing the original submersed nozzle obtained after flocculating flow blocking, oxygen is used for burning off inclusion in the upper nozzle of the tundish, then a new submersed nozzle is used for replacement, the stopper rod is opened to enable molten steel to smoothly flow down, and casting operation continues to be carried out. According to the method, the inclusion accumulated in the upper nozzle of the tundish is effectively removed so that the molten steel can be smoothly cast down through the upper nozzle; according to the method, damage of the long time and the low pull speed to equipment is eliminated, the equipment is protected to the largest degree, and the inner quality and outer quality of the subsequent casting blank are guaranteed; according to the method, flocculating flow blocking of the upper nozzle of the tundish can be eliminated within a short time, shutdown accidents are avoided, and production cost is greatly reduced; and the method is high in operability, safe, reliable and remarkable in application effect.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for eliminating flocculation blockage of a nozzle on a tundish. Background technique [0002] At present, in the continuous casting production process, due to improper treatment of molten steel in individual furnaces, excessive oxidation of molten steel, and too many inclusions, the nozzle is easily blocked by flocculation. Pulling speed limit, in order to protect equipment and prevent accidents from expanding, post workers generally choose to shut down. [0003] The main problems of this approach are: 1. Shutdown accidents disrupted the original production plan, resulting in the failure to realize the planned fulfillment rate; 2. Reheating and alloying treatment of the remaining molten steel in the large bag returned to refining, consuming a lot of electricity and alloy costs, At the same time, the tundish tundish produces a large amount of scrap stee...

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): B22D11/10B22D41/50
CPCB22D11/10B22D41/50
Inventor 刘永平赵登报刘建伟时成金马玉沅王嘉祺王德强薛兴德陈刚张树彬王刚
Owner SHANDONG IRON & STEEL CO LTD
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