High-speed wide and thick slab continuous casting mold flux

A technology of mold powder and slab continuous casting, which is applied in the field of continuous casting mold powder, can solve the problems of casting slab surface quality, cohesive breakout and other problems, and achieve increased melting speed, improved lubricity, and improved lubrication. effect of effect

Inactive Publication Date: 2015-05-06
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method to effectively solve the problems of cohesive breakout and slab surface quality in the process of continuous casting of high-speed wide-thick slabs, and to ensure the smooth flow of the production process. Mold flux for continuous casting of wide and thick slabs at high casting speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mold powder for high-speed wide-thick slab continuous casting crystallizer of the present invention is made of the following raw materials in parts by weight: 50 parts of premelt, 10 parts of soda ash, 3 parts of lithium carbonate, 7 parts of fluorite, 10 parts of limestone, and silica fume 15 parts of albite, 6 parts of albite, 6 parts of manganese carbonate, 1 part of earthy graphite, 2 parts of carbon black, and 1 part of dispersant.

[0015] The dispersant is composed of the following components in parts by weight, 40 parts of sodium carbonate and 60 parts of starch.

[0016] The high-speed wide-thick slab continuous casting mold powder has a binary basicity of CaO / SiO 2 is 1.18, melting point is 1060°C, viscosity is 0.98 Pa / s, static pressure is 320 Pascals, the mass percentage of fixed carbon is 3.5%, and the mass percentage of water is ≤0.5%.

[0017] The mold slag obtained in this example was poured in a 1# continuous casting machine of an iron and steel group ...

Embodiment 2

[0020] The high-speed wide-thick slab continuous casting mold mold powder of the present invention is made of the following raw materials in parts by weight: 58 parts of premelt, 7 parts of soda ash, 2 parts of lithium carbonate, 5 parts of fluorite, 6 parts of limestone, and silica fume 20 parts of albite, 4 parts of albite, 4 parts of manganese carbonate, 2 parts of earthy graphite, 2 parts of carbon black, and 2 parts of dispersant.

[0021] The dispersant consists of the following ingredients in parts by weight, 50 parts of sodium carbonate and 50 parts of starch.

[0022] The high-speed wide-thick slab continuous casting mold powder has a binary basicity of CaO / SiO 2 The melting point is 1080°C, the viscosity is 0.1 Pa / s, the static pressure is 332 Pascals, the mass percentage of fixed carbon is 4.2%, and the mass percentage of water is ≤0.5%.

[0023] The mold slag obtained in this example was poured in a 1# continuous casting machine of an iron and steel group with a c...

Embodiment 3

[0026] Mold powder for high-speed wide-thick slab continuous casting mold of the present invention is made of the following raw materials in parts by weight: 65 parts of premelt, 5 parts of soda ash, 1 part of lithium carbonate, 10 parts of fluorite, 4 parts of limestone, and silica fume 10 parts of albite, 3 parts of albite, 3 parts of manganese carbonate, 3 parts of earthy graphite, 1 part of carbon black, and 1.5 parts of dispersant.

[0027] The dispersant is composed of the following components in parts by weight, 60 parts of sodium carbonate and 40 parts of starch.

[0028] The high-speed wide-thick slab continuous casting mold powder has a binary basicity of CaO / SiO 2 is 1.22, melting point is 1100°C, viscosity is 0.12 Pa / s, static pressure is 340 Pascals, the mass percentage of fixed carbon is 4.5%, and the mass percentage of water is ≤0.5%.

[0029] The mold slag obtained in this example was poured in a 1# continuous casting machine of an iron and steel group with a ...

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Abstract

The invention provides a high-speed wide and thick slab continuous casting mold flux, and belongs to the technical field of continuous casting mold fluxes. The high-speed wide and thick slab continuous casting mold flux comprises the following raw materials: pre-melting materials, soda ash, lithium carbonate, fluorspar, limestone, wollastonite, albite, carbonate manganese, amorphous graphite, carbon black and a dispersant, and is obtained by grinding, mixing, granulation and other processing steps. According to the invention, the high-speed wide and thick slab continuous casting mold flux is uniform in size, bright black and uniform in color, high in strength, difficult to be crushed, excellent in all performances responded in the casting mold, stable and uniform in conducted heat, adaptive to the requirements of continuous change of the speed, and good in lubrication; the problem of uneven inflow is solved; the sticking breakout is avoided; the slab surface has no cracks, dents, bulges, surface-included slag, sticking slag and other phenomena.

Description

technical field [0001] The invention belongs to the technical field of mold flux for continuous casting molds, and in particular relates to mold flux for continuous casting molds for high-speed wide-thick slabs. Background technique [0002] With the advancement of science and technology, continuous casting technology has been steadily advancing in large iron and steel enterprises. Due to the continuous innovation of steelmaking technology, the pace of steelmaking has been accelerated and production capacity has been released. However, compared with the subsequent steel rolling capacity, the production capacity of continuous casting machines is still the throat and bottleneck restricting steel production. For this reason, in recent years, iron and steel enterprises at home and abroad have generally adopted high-efficiency continuous casting technology. The so-called high-efficiency continuous casting usually refers to the continuous casting system technology with higher pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 李中吾王勇源朱云峰唐红波
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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