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High-manganese medium-carbon peritectic steel continuous casting crystallizer casting powder and preparation method thereof

A continuous casting mold and mold powder technology, which is applied in the field of high manganese medium carbon peritectic steel continuous casting mold mold powder and its preparation, can solve problems such as breakout, deterioration of casting slab and mold lubrication, bonding, etc. , to achieve the effect of reducing the crack rate, avoiding bonding or even breakout, and avoiding crystallization

Active Publication Date: 2015-04-22
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that in practical application, the crystallization performance of mold slag is improved, and at the same time, crystallization will occur in the liquid slag film, which will deteriorate the lubrication condition between the billet and the mold, and lead to bonding and even breakout, etc. Occurrence of production accidents

Method used

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  • High-manganese medium-carbon peritectic steel continuous casting crystallizer casting powder and preparation method thereof
  • High-manganese medium-carbon peritectic steel continuous casting crystallizer casting powder and preparation method thereof
  • High-manganese medium-carbon peritectic steel continuous casting crystallizer casting powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]

[0026] Experimental process of steel plant A: test steel type: medium carbon peritectic steel, pouring section: 230*1030 mm, pouring temperature: 1535-1565 ℃, casting speed: 0.8-1.1 m / min;

[0027] Test quantity: 5.0 t;

[0028] After testing about 50 furnaces of nearly 6,000 tons of steel pouring, the results are as follows:

[0029] The crystallizer reflects small flame and less slag, and workers report that it is easy to operate. The quality of casting slabs has been greatly improved compared with the use of ordinary carbon steel mold flux, and the surface pass rate has increased to 99.27% ​​from 73.45% in the previous month. It solves the problem of pits on the surface of ordinary carbon steel mold slag. At the same time, the analysis of the surface of the slab shows that the low-carbon mold slag of the billet has basically no carbon increase phenomenon.

Embodiment 2

[0031]

[0032] B steel plant test process: steel type: medium carbon peritectic steel, section: 250*1700 mm, casting speed: 0.85~1.05 m / min.

[0033] During the test, it was observed that the mold powder has good spreadability in the crystallizer, moderate flame, active reaction, no agglomeration, no slag block, and even melting;

[0034] Liquid slag layer: the total slag layer is about 35 mm, and the liquid slag is kept stable at 10-12 mm;

[0035] Slag consumption: According to statistics, it is about 0.53 Kg / T, which is moderate;

[0036]During this experiment period, the molten steel level in the mold was extremely stable, there was no violent tumbling phenomenon at the edge, and the casting speed was stable at 1-1.05 m / min; during the tracking period, there was no phenomenon that the monitoring curve ran high, indicating that the slag mold The lubrication effect is ideal. There are no cracks or pits on the surface of the finished billet, and the surface qualified ra...

Embodiment 3

[0038]

[0039] Experimental process of C steel plant: test steel type: medium carbon peritectic steel, pouring section: 270*1800 mm, casting speed: 0.8~1.0 m / min;

[0040] During the test, it was observed that the mold slag spreads well in the crystallizer, the flame is moderate, the reaction is active, there is no agglomeration, no slag block, and the melting is uniform; the slag is less, and the workers report that it is easy to operate

[0041] Liquid slag layer: the total slag layer is about 30mm, and the liquid slag is kept stable at 11-13 mm;

[0042] Slag consumption: According to statistics, it is about 0.58 Kg / T, which is moderate;

[0043] During this experiment period, the liquid steel level in the mold was extremely stable, there was no violent tumbling phenomenon at the edge, and the casting speed was stable at 0.9-0.95 m / min; The lubrication effect is ideal. There are no cracks or pits on the surface of the finished billet, and the surface qualified rate ha...

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Abstract

The invention discloses high-manganese medium-carbon peritectic steel continuous casting crystallizer casting powder and a preparation method thereof. 2%-8% of MnO is added into the casting powder, infrared transmitting performance of the casting powder is obviously reduced, infrared light transmittance of the casting powder is reduced, radiant heat transfer performance of the casting powder is reduced, the cracking rate can be reduced and can be effectively controlled under 0.8%, and therefore production cost is greatly reduced. Through effective control on crystallization performance of the casting powder, the condition that crystallization occurs in liquid flux films can be effectively avoided, and therefore the production accidents such as bonding and even bleed-out can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of steelmaking auxiliary materials, and in particular relates to a high-manganese medium-carbon peritectic steel continuous casting mold mold slag and a preparation method thereof. technical background [0002] For medium carbon peritectic steel continuous casting, peritectic reaction will occur during the solidification process, the primary billet shell shrinks greatly in the area 50mm below the meniscus of the crystallizer, the grains are coarse, the primary billet shell grows unevenly, and cracks are prone to occur. It is a recognized problem in the global steel industry. [0003] At present, there are many manufacturers producing mold slag for medium carbon peritectic steel continuous casting molds, but there are many problems in continuous casting practice whether it is imported slag or domestic slag, mainly manifested in: (1) Slab crack rate (2) Imported slag cannot be effectively adjusted in time acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 张福陈永艳屈党军彭会志薄红涛王岩王正英赵春宝梁冠东王旭阳
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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