Unlock instant, AI-driven research and patent intelligence for your innovation.

Ultra-low alkalinity and high vitrification mold powder for high-carbon steel in bloom and preparation method thereof

A high vitrification, medium-high carbon technology, applied in the field of steelmaking and metallurgical auxiliary materials, can solve the problems of low carbon content, low fluorine content, high pre-melting ratio of mold slag, etc., to improve product quality, heat transfer stability, and improve lubrication performance Effect

Active Publication Date: 2022-04-08
HENAN TONGYU METALLURGY MATERIALS GRP
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold slag has low carbon content, high pre-melting ratio, is not easy to generate slag rings, and can self-heat. It is applied to high-carbon steel in square and rectangular special steel to avoid local carburization of high-carbon steel in special steel. At the same time, the fluorine content is low to avoid Erosion of nozzle slag line, but no reuse of molten cinder waste

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

Embodiment 1

[0032] An ultra-low alkalinity and high vitrification ratio mold powder for high-carbon steel in a bloom, prepared from the following raw materials in parts by weight: 15 parts of wollastonite, 30 parts of molten cinder waste from power plants, 13 parts of quartz, and 6 parts of albite feldspar , 2 parts of sodium fluoride, 1 part of soda ash, 6 parts of fluorite, 5 parts of magnesia powder, 6 parts of 390 medium carbon graphite, 6 parts of high carbon earthy graphite, 2 parts of semi-reinforced natural gas carbon black, 8 parts of sodium silicate share.

[0033] The preparation method of the ultra-low alkalinity high vitrification ratio mold flux for high-carbon steel in the above bloom comprises the following steps:

[0034] (1) Raw material pretreatment: Stir the molten cinder waste from the power plant evenly, dry it with a water content of ≤1%, and crush it to a particle size of 300 mesh ≥95%;

[0035] (2) Pulping: Weigh each raw material by weight, place it in a slurry ...

Embodiment 2

[0042] An ultra-low alkalinity and high vitrification ratio mold powder for high-carbon steel in a bloom, prepared from the following raw materials in parts by weight: 20 parts by weight of wollastonite, 28 parts of molten cinder waste from power plants, 8 parts of quartz, and 8 parts of albite , 3 parts of sodium fluoride, 2 parts of soda ash, 6.5 parts of fluorite, 4.5 parts of magnesia powder, 5 parts of 390 medium carbon graphite, 5 parts of high carbon earthy graphite, 1.8 parts of semi-reinforced natural gas carbon black, 7.5 parts of sodium silicate share.

[0043] The preparation method of the ultra-low alkalinity high vitrification ratio mold flux for high-carbon steel in the above bloom comprises the following steps:

[0044] (1) Raw material pretreatment: Stir the molten cinder waste from the power plant evenly, dry it with a water content of ≤1%, and crush it to a particle size of 300 mesh ≥95%;

[0045] (2) Pulping: Weigh each raw material by weight, place it in ...

Embodiment 3

[0052] An ultra-low alkalinity high vitrification rate mold powder for high-carbon steel in a bloom, prepared from the following raw materials in parts by weight: 24 parts of wollastonite, 24 parts of molten cinder waste from power plants, 5 parts of quartz, and 13 parts of albite feldspar , 4 parts of sodium fluoride, 2 parts of soda ash, 7 parts of fluorite, 4 parts of magnesia powder, 4.5 parts of 390 medium carbon graphite, 4.5 parts of high carbon earthy graphite, 1.5 parts of semi-reinforced natural gas carbon black, 7 parts of sodium silicate share.

[0053] The preparation method of the ultra-low alkalinity high vitrification ratio mold flux for high-carbon steel in the above bloom comprises the following steps:

[0054] (1) Raw material pretreatment: Stir the molten cinder waste from the power plant evenly, dry it with a water content of ≤1%, and crush it to a particle size of 300 mesh ≥95%;

[0055] (2) Pulping: Weigh each raw material by weight, place it in a slurr...

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultra-low-alkalinity high-vitrification mold powder for high-carbon steel in a bloom and a preparation method thereof, belonging to the technical field of steelmaking and metallurgical auxiliary materials, and is prepared from the following raw materials in parts by weight: 15-35 parts of wollastonite 15-30 parts of molten cinder waste from power plants, 2-13 parts of quartz, 6-13 parts of albite feldspar, 2-8 parts of sodium fluoride, 1-5 parts of soda ash, 6-10 parts of fluorite, 2-2 parts of magnesia powder 5 parts, 1‑6 parts of 390 medium carbon graphite, 2‑6 parts of high carbon earthy graphite, 1.5‑3 parts of semi-reinforcing natural gas carbon black, 5‑8 parts of sodium silicate. The invention adopts ultra-low alkalinity to control the high vitrification rate in the solidification process of molten slag, and ensures the shell thickness and lubricating effect in the medium-high carbon continuous casting process; adopts higher viscosity, and when the cast slab has a certain shrinkage, The slag is introduced evenly, so that the solid slag film is uniform, and the surface of the slab is smooth; the use of a slightly higher melting point and viscosity reduces the amount of flux, increases the surface tension of the slag, and reduces the probability of slag curling; Adjust to improve the problem of occasional carburization of slabs.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and metallurgical auxiliary materials, and in particular relates to an ultra-low alkalinity and high vitrification mold powder for medium-high carbon steel in a bloom and a preparation method thereof. Background technique [0002] The medium-high carbon steel produced by the bloom is basically special-purpose steel, which has high requirements on the surface and subcutaneous quality of the billet. The shell under static pressure expands, and it is easy to stick to the wall of the crystallizer, resulting in bonding and scratches (slag grooves) on the primary shell; in addition, due to the low temperature of the liquidus line of medium and high carbon steel, the casting temperature leads to the endothermic melting effect of mold slag Deterioration, prone to defects such as thin liquid slag layer and slag entrainment. In addition, the casting speed of blooms is generally low, and it has wide ada...

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 陈守杰封彦雷王勇源曹子乐李继薛斌王建伟付德俭
Owner HENAN TONGYU METALLURGY MATERIALS GRP