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High draw speed plate blank continuous casting low carbon steel crystallizer protective slag

A mold flux and slab continuous casting technology, which is applied in the field of high-speed slab continuous casting low-carbon steel mold flux, can solve the problem of insufficient lubrication of the mold wall and solidified slab shell, and the consumption of continuous casting flux Reduced amount, surface defects of slab, etc., achieve the effect of improving uneven inflow, good heat preservation and melting performance, and good surface quality of slab

Inactive Publication Date: 2006-08-30
宝钢集团上海梅山有限公司
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AI Technical Summary

Problems solved by technology

However, the realization of high-speed continuous casting technology has brought many new problems to the continuous casting process. One of them is that as the casting speed increases, the relative consumption of continuous casting mold flux decreases, resulting in a gap between the mold wall and the solidified billet shell. Insufficient lubrication and uneven heat transfer between the casting slabs lead to surface defects and even cohesive breakouts, especially during unsteady pouring

Method used

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Embodiment Construction

[0012] Below by embodiment, the present invention is described in further detail: Example 1, 2# melting material (produced by Henan Xixia County Protection Material Group Co., Ltd.), lithium carbonate, sodium carbonate, fluorite, quartz sand, wollastonite, manganese ore powder , Iron slime (the main component is Fe 2 o 3 ), carbon black, bentonite, and its weight percentage ranges are respectively 58%, 3.0%, 5.0%, 4.0%, 7.0%, 9.0%, 6.0%, 1.0%, 4.0%, 3.0%. Li in mold flux 2 O weight percentage content is 1.0~1.5%, MnO weight percentage content is 2.0~3.0%, MgO weight percentage content is 3.0~5.0%, Fe 2 o 3 The weight percentage is 0.7~1.5%, the binary alkalinity (CaO / SiO 2 ) is 0.93~0.97, and the rest is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , whose percentage is SiO 2 28.0~34.0%, CaO 27.0~33.0%, Al 2 o 3 2 O 6.0~7.0%, F - 5.0~6.0%, k 2 O<0.5%. The mold flux of the present invention adopts the following quality control standards: 1) the particle size of each raw ma...

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Abstract

The present invention relates to a high pulling rate sheet billet continuously-casting low-carbon crystallizer protective slag. Said protective slag is formed from the following ingredients: (by wt%) melting material 50-65%, lithium carbonate 1.2-3.6%, sodium carbonate 2.3-6.0%, fluorite is 3.0-6.9%, quartz sand 6.0-9.5%, satellite 7.0-10.0%, manganese ore powder 5.0-9.0%, ferrous and 1.0-3.5%, carbon blank 2.0-7.0% and bentonite 2.0-5.5%.

Description

Technical field: [0001] The invention relates to mold powder for metallurgical auxiliary materials, in particular to mold powder for high-speed slab continuous casting low-carbon steel mold. Background technique: [0002] With the advancement of science and technology, continuous casting technology has gradually matured. However, due to the continuous improvement of steelmaking technology, the pace of steelmaking has accelerated, and the amount of steel tapping from the furnace has increased. Compared with steelmaking and subsequent steel rolling capabilities, the production capacity of continuous casting machines is still a restrictive link in the entire steel production process. . 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 production efficiency tha...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 陈志平文光华江中块唐萍董汉君
Owner 宝钢集团上海梅山有限公司
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