Casting powder for medium carbon peritectic steel continuous casting crystallizer

A continuous casting crystallizer and medium carbon sub-laden technology, which is applied in the field of iron and steel smelting and continuous casting, can solve problems such as cracks and low melting points, and achieve the effects of preventing molten steel from oxidation, preventing absorption of inclusions, and weakening heat transfer

Inactive Publication Date: 2012-09-05
JIANGSU UNIV
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Continuous casting technology has been highly valued by the metallurgical industry for its high efficiency, energy saving, high quality, easy automation and intelligence, and many other advantages. Mold slag has also been developed accordingly and has become an indispensable metallurgical auxiliary material; the existing continuous casting mold slag mainly uses SiO2-Al2O3-CaO slag system, on this basis, add a small amount of flux (alkali metal or alkaline earth metal oxide, fluoride, boride, etc.) and carbonaceous materials (carbon black, graphite and coke, etc.), this type of mold flux has a lower melting point and viscosity, and has the advantages of glass slag lubricating effect and good effect of absorbing inclusions, but the current SiO2-Al2O3-CaO-based mold flux needs a higher content of Al2O3 in order to ensure a low melting temperature, which limits It improves the ability of slag to absorb Al2O3 inclusions, especially for the existing mold slag, in order to ensure a low melting temperature, the basicity of the slag is in the range of 0.9-1.1 The slag has obvious characteristics of low-melting glass slag, and the mold flux is not suitable for crack-sensitive sub-peritectic steel casting; for medium-carbon sub-peritectic steel, it is characterized by cracks on the surface, so continuous casting The mold flux should have two typical characteristics: First, the mold flux should have a low melting point and viscosity to ensure the fluidity and spreadability of the mold flux in the high-temperature area of ​​the mold. This is why the mold flux can lub

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
  • Casting powder for medium carbon peritectic steel continuous casting crystallizer
  • Casting powder for medium carbon peritectic steel continuous casting crystallizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Lime, silica, boric anhydride, lithium oxide, corundum powder and boron nitride are used as raw materials, fully dried and dehydrated at 200°C, ground into fine powder, weighed ingredients, pre-melted at 1300°C, cooled in a mill Grind internally until it passes through a 200 mesh sieve (particle size less than 0.074mm), and make hollow particles in a spray granulation tower, and the particle size of mold powder ranges from 0.1-0.4mm.

[0024] The composition analysis results of the prepared mold flux are as follows (mass percentage):

[0025] CaO 44%, SiO 2 45%, B 2 o 3 3%, Li 2 O 2%, Al 2 o 3 2%, BN 3%, the balance is impurities, of which S 0.02%, P 0.02%.

[0026] The main physical and chemical performance indicators of this embodiment are shown in Table 2.

Embodiment 2

[0028] Lime, silica, boric anhydride, lithium oxide, corundum powder and boron nitride are used as raw materials, fully dried and dehydrated at 200°C, ground into fine powder, weighed ingredients, pre-melted at 1300°C, cooled in a mill Grind internally until it passes through a 200 mesh sieve (particle size less than 0.074mm), and make hollow particles in a spray granulation tower, and the particle size of mold powder ranges from 0.1-0.4mm.

[0029] The composition analysis results of the prepared mold flux are as follows (mass percentage):

[0030] CaO 50%, SiO 2 40%, B 2 o 3 2%, Li 2 O 2%, Al 2 o 32%, BN 3%, the balance is impurities, of which S 0.02%, P 0.02%.

[0031] The main physical and chemical performance indicators of this embodiment are shown in Table 2.

Embodiment 3

[0033] Lime, silica, boric anhydride, lithium oxide, corundum powder and boron nitride are used as raw materials, fully dried and dehydrated at 200°C, ground into fine powder, weighed ingredients, pre-melted at 1300°C, cooled in a mill Grind internally until it passes through a 200 mesh sieve (particle size less than 0.074mm), and make hollow particles in a spray granulation tower, and the particle size of mold powder ranges from 0.1-0.4mm.

[0034] The composition analysis results of the prepared mold flux are as follows (mass percentage):

[0035] CaO 40%, SiO 2 50%, B 2 o 3 1%, Li 2 O 3%, Al 2 o 3 1%, BN 4%, the balance is impurities, of which S 0.02%, P 0.02%.

[0036] The main physical and chemical performance indicators of this embodiment are shown in Table 2.

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 belongs to the technical field of steel melting continuous casting production, and particularly relates to casting powder for a medium carbon peritectic steel continuous casting crystallizer sensitive to cracks. The casting powder comprises the following components by weight percentage: 40 to 50 percent of CaO, 40 to 50 percent of SiO2, 1 to 6 percent of B2O, 1 to 4 percent of Li2O, 1 to 5 percent of Al2O3, 1 to 6 percent of BN1 and 1 to 2 percent of inevitable impurities, wherein the impurities comprise 0.03 percent of S and 0.03 percent of P. The preparation method comprises the steps of: fully drying and dehydrating raw materials, weighing and mixing according to weight parts, grinding and uniformly mixing, pre-melting, cooling, powdering, and adopting the conventional casting powder preparing and molding process to obtain granular finished casting powder. The casting powder has relatively low melting temperature and relatively high crystallization temperature, particularly has the advantages of good lubrication and anti-oxidization effects of glass powder and high impurity absorption capacity and the advantages of high heat preservation performance of the powder with the high crystallization temperature and casting blank crack control, and is suitable for pouring medium carbon peritectic steel sensitive to the cracks.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting and continuous casting production, and in particular relates to a mold slag for crack-sensitive medium-carbon sub-peritectic steel continuous casting crystallizers. Background technique [0002] The continuous casting technology has been highly valued by the metallurgical industry for its advantages of high efficiency, energy saving, high quality, easy automation and intelligence, etc., and the matching continuous casting mold powder has also been developed accordingly, and has become an indispensable Metallurgical auxiliary materials; the existing continuous casting mold flux mainly uses SiO 2 -Al 2 o 3 -CaO slag system, on this basis, add a small amount of flux (alkali metal or alkaline earth metal oxide, fluoride, boride, etc.) and carbonaceous materials (carbon black, graphite, coke, etc.) Slag has a lower melting point and viscosity, and has the advantages of glass slag lu...

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): B22D11/111
Inventor 王宏明李桂荣杨丽莉朱祥赵玉涛
Owner JIANGSU UNIV
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