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

A kind of mold slag for continuous casting mold for p91 steam pipeline steel and its preparation method

A continuous casting crystallizer and steam pipeline technology, applied in the field of metallurgical materials, can solve the problems of poor fluidity of slag, low binary alkalinity, uneven inflow, etc., and achieve the reduction of shell scratches, full crystallization, Effect of preventing sticky slag

Active Publication Date: 2018-11-13
HENAN XIBAO METALLURGICAL MATERIALS GROUP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent mold slag has a low binary alkalinity and cannot achieve the purpose of slow cooling of the slab during casting. Because the slab is cooled too quickly during casting and the shrinkage of the slab shell is too large, longitudinal cracks are easily generated, and the viscosity value is high. It also leads to poor fluidity of slag and uneven inflow

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
  • A kind of mold slag for continuous casting mold for p91 steam pipeline steel and its preparation method
  • A kind of mold slag for continuous casting mold for p91 steam pipeline steel and its preparation method
  • A kind of mold slag for continuous casting mold for p91 steam pipeline steel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described below in conjunction with some specific embodiments.

[0035] The chemical composition and weight percentage of P91 mold flux for continuous casting in Examples 1 to 8 of the present invention are shown in Table 1, the weight percentage of each raw material is shown in Table 2, and the chemical composition and weight percentage of the premelt used The contents are shown in Table 3.

[0036] The preparation method of mold flux for P91 continuous casting mold in Example 1 of the present invention comprises the following steps: crush each raw material to 200-mesh fine powder, add it to a mold flux ball mill, and then add clear water to make the pulping concentration 60%, and grind The slurry time is 60 minutes, and it enters the hot air spray tower through the pressure pump for 600 ℃ spray granulation to obtain hollow granular mold powder with a particle size range of 0.15-1.0mm and a moisture content of ≤0.30%.

[0037] The...

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
diameteraaaaaaaaaa
viscosityaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of metallurgy materials, and particularly relates to continuous casting crystallizer casting powder for P91 steam pipeline steel and a preparation method of the continuous casting crystallizer casting powder. The casting powder is prepared from, by weight percent, 26.0%-35.0% of SiO2, 27.0%-37.0% of CaO, 0.4%-1.2% of Li2O, not larger than 6.0% of Al2O3, 7%-13% of Na2O, 4%-8% of F-, not larger than 4.0% of MgO, not larger than 1.0% of Fe2O3, 5%-9% of Csolid and 8%-12% of volatile components. The casting powder can achieve crystallizer lubricating during low-temperature casting, a slag film has sufficient crystallization to improve crystallizer heat transfer, P91 steel large round blank surface longitudinal cracks are reduced, and the casting blank quality is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical materials, and in particular relates to a continuous casting crystallizer mold powder for P91 steam pipeline steel and a preparation method thereof. Background technique [0002] In the past, the pipes in the hot section of the steam pipeline were all made of P22 pipes, which belonged to pearlitic heat-resistant steel, and the maximum working temperature was 580-590 ℃. The biggest disadvantage is that the high-temperature durable strength is low, and the wall thickness of the steam pipe is too large, which not only increases the difficulty of manufacture, but also brings inconvenience to design, installation and operation. P91 steel is based on the original 9Cr-1Mo steel by adding V, Nb, N and other strengthening elements to improve the strength of the steel. Adding Cr, Si and other elements can make the oxide film formed by the metal at high temperature operation dense and firm, and improve...

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 Patents(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 李伟锋李书成李保军方卉宋志刚
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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