Fluorine free protecting slag for steelmaking and continuous casting and method for manufacturing same

A technology of steelmaking continuous casting and manufacturing method, which is applied in the field of fluorine-free steelmaking and continuous casting mold slag and manufacturing, and can solve the problems of complex structure of processing equipment, troublesome processing, high price, etc.

Active Publication Date: 2005-09-14
SANYI METALLURGICAL MATERIAL
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  • Abstract
  • Description
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Problems solved by technology

It makes the structure of the treatment equipment more complicated, the price is high, the treatment is troublesome, and the cost of wastewater treatment is high

Method used

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  • Fluorine free protecting slag for steelmaking and continuous casting and method for manufacturing same
  • Fluorine free protecting slag for steelmaking and continuous casting and method for manufacturing same
  • Fluorine free protecting slag for steelmaking and continuous casting and method for manufacturing same

Examples

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Embodiment Construction

[0061] Manufacture of fluorine-free mold fluxes for steelmaking and continuous casting. Examples are listed in the following table:

[0062] In the following examples, example 2 is composed of 50% of the fully melted boron liquid slag layer that can replace the role of fluorine, and 7.5% of soda ash is mixed with other raw materials; example 3 is composed of 45% of synthetic silicon calcium that can replace the role of fluorine , Fully melted boron liquid slag layer composition 15%, soda ash 11%, spodumene 2%, lithium carbonate 5%, mixed with other raw materials, passed figure 2 Process manufacturing of granular products for the equipment shown. The remaining example 1, example 4 to example 14 are the same as the above example 2 and example 3, which contain B according to the chemical composition. 2 O 3 Liquid slag layer, containing Li 2 Liquid slag layer of O, containing Na 2 O liquid slag layer and containing MnO 2 The liquid slag layer raw materials, used alone or mixed with o...

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Abstract

A fruorine-free mold flux for the continuous casting of steel and method for producing the same relates to a mold flux for the continuous casting of new steel grade, which accord with the requirement of protecting natural environment. The characteristic is in that the mold flux contains the fellowing compositions and performance range: 23-40% SiO2, 20-4-% CaO, 0.5-10% MgO, 0.5-10% Al2O3, 0.5-10% MnO2, 2-15% Na2O, 5-15% B2O3, and 0.5-10% C; the melting point is 800-1200 DEG C, the viscosity is 0.2-5 pt, and the crystallizer rate is 0.1-30%. The advantages of the invention are in that the fruorine-free mold flux can alternatively act the role of the fluorine component, according with the continuous casting conditions (steel grade, casting speed, and the like). In this way, uniform fusing characteristic, fluidity and viscosity are improved or promoted, and the mold flux is contributed to the improvement of the operational stability and the product quality with the smooth workability in the continuous casting process by singly or in combination use.

Description

(1) Technical field [0001] The invention relates to a new type of mold flux for steelmaking continuous casting, which meets the requirements of protecting the natural environment, in particular to a fluorine-free mold flux for steelmaking continuous casting and a manufacturing method. (2) Background technology [0002] Commonly used mold flux for continuous steelmaking (MOLD FLUX) generally contains 0.5-15% of fluorine content. The surface of the cast slab and the slag residue of the mold flux, the fluorine content contained in these residues, partially evaporate, but Most of it remains inside. In the casting process, in order to solidify and cool the cast slab, a cooling method of directly spraying water on the surface of the cast slab is used to make the cooling wastewater flow into the fluorine component. Due to the increase in the concentration of fluorine in the waste water, the water treatment equipment has to have a separate treatment of the fluorine component in the treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/10B22D11/108B22D11/111
CPCB22D11/108C04B35/04C04B35/10C22C33/0271C22C38/004
Inventor 金宽椿
Owner SANYI METALLURGICAL MATERIAL
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