A kind of mold slag for continuous casting mold for boron-containing steel
A continuous casting crystallizer and mold slag technology, which is applied in the field of metal smelting auxiliary materials, can solve problems such as cracks at the edge of the billet and high sensitivity to cracks in boron-containing steel, achieve good lubrication performance, overcome the friction of the billet, and improve stability sexual effect
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Embodiment 1
[0025] For the continuous casting mold mold powder for boron-containing steel produced by Factory A, it is made of the following raw materials in parts by weight: 4 parts of glass powder, 48 parts of premelt, 28 parts of wollastonite, 2 parts of carbon black, and 4 parts of graphite parts, 6 parts of sodium carbonate, 3.5 parts of sodium fluoride, 3.5 parts of bauxite, 2.5 parts of lightly burned magnesia, 5.5 parts of boron carbide, and 1.2 parts of binder.
[0026] Wherein, the composition and weight percent of the premelt used in the present invention consist of: SiO 2 42~45%, CaO36~39%, MgO1.5~3.5%, Fe 2 o 3 Not more than 1%, Al 2 o 3 4~6%, Na 2 O5~7%, F2~4%. In addition, conventional adhesives in the field such as dextrin can be used as the adhesive.
[0027] The physical properties of the mold slag for continuous casting molds for boron-containing steel in this embodiment are: basicity CaO / SiO 2 It is 1.14, the melting point is 1065°C, and the viscosity at 1300°C ...
Embodiment 2
[0030] For the continuous casting mold mold powder for boron-containing steel produced by Plant B, it is made of the following raw materials in parts by weight: 4 parts of glass powder, 45 parts of premelt, 29 parts of wollastonite, 2 parts of carbon black, and 4 parts of graphite parts, 7 parts of sodium carbonate, 3 parts of sodium fluoride, 2.5 parts of bauxite, 3 parts of lightly burned magnesia, 5 parts of boron carbide, and 1.2 parts of binder.
[0031] Wherein, the composition and weight percent of the premelt used in the present invention consist of: SiO 2 42~45%, CaO36~39%, MgO1.5~3.5%, Fe 2 o 3 Not more than 1%, Al 2 o 3 4~6%, Na 2 O5~7%, F2~4%. In addition, conventional adhesives in the field such as dextrin can be used as the adhesive.
[0032] The physical properties of the mold slag for continuous casting molds for boron-containing steel in this embodiment are: basicity CaO / SiO 2 It is 1.12, the melting point is 1045°C, and the viscosity at 1300°C is 0.42P...
Embodiment 3
[0035]For the continuous casting mold powder for boron-containing steel produced by Plant C, it is made of the following raw materials in parts by weight: 5 parts of glass powder, 50 parts of premelt, 27 parts of wollastonite, 2 parts of carbon black, and 5 parts of graphite parts, 5 parts of sodium carbonate, 4 parts of sodium fluoride, 3.5 parts of bauxite, 2 parts of lightly burned magnesia, 6 parts of boron carbide, and 1.2 parts of binder.
[0036] Wherein, the composition and weight percent of the premelt used in the present invention consist of: SiO 2 42~45%, CaO36~39%, MgO1.5~3.5%, Fe 2 o 3 Not more than 1%, Al 2 o 3 4~6%, Na 2 O5~7%, F2~4%. In addition, conventional adhesives in the field such as dextrin can be used as the adhesive.
[0037] The physical properties of the mold slag for continuous casting molds for boron-containing steel in this embodiment are: basicity CaO / SiO 2 It is 1.13, the melting point is 1055°C, and the viscosity at 1300°C is 0.41Pa·s. ...
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