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Profiled-blank continuous casting machine and profiled-blank continuous casting secondary cooling water blowing method

A special-shaped billet continuous casting and secondary cooling technology, applied in the field of metallurgy, can solve the problems of uneven cooling and quality defects of the billet, and achieve the effect of reducing the surface temperature deviation, improving the quality of the billet and continuous casting productivity.

Inactive Publication Date: 2015-10-28
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a special-shaped billet continuous casting machine and a secondary cooling water blowing method for the special-shaped billet continuous casting. The problem of uneven cooling of the slab caused by water accumulation in the inner arc avoids the quality defects of the slab

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  • Profiled-blank continuous casting machine and profiled-blank continuous casting secondary cooling water blowing method
  • Profiled-blank continuous casting machine and profiled-blank continuous casting secondary cooling water blowing method
  • Profiled-blank continuous casting machine and profiled-blank continuous casting secondary cooling water blowing method

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Embodiment Construction

[0017] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0018] figure 1 It is a structural schematic diagram of an existing profiled billet continuous casting machine, including sequentially connected steel ladle 1, tundish 2, crystallizer 3, and fan-shaped I section 4, fan-shaped II section 5, and fan-shaped III section 6 of the cooling chamber. The installation positions of the original water blowers 7 and 8 in the second cold room are respectively at the end of section II of each flow and the end of the guide section, the casting lengths are 9m and 12m respectively, and the distance between the water blowers 7 and 8 is The surface is 15-18mm, and the distance from the billet surface is relatively far. The medium used is compressed air, and the working pressure of the medium is 0.35-0.42 kg, which is relatively small. During the operation, it was found that ...

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Abstract

The invention discloses a profiled-blank continuous casting machine and a profiled-blank continuous casting secondary cooling water blowing method. By improving the positions of cooling water blowing devices in the secondary cooling zone of profiled-blank continuous casting and the water blowing method, the problem of non-uniform casting blank cooling caused by accumulated water in an inner arc of a profiled blank is solved, and the quality defects of the casting blank are avoided. The continuous casting machine comprises a steel ladle, a tundish, a crystallizer, and a fan-shaped section I, a fan-shaped section II and a fan-shaped section III of a cooling chamber, wherein the steel ladle, the tundish, the crystallizer, and the fan-shaped section I, the fan-shaped section II and the fan-shaped section III of the cooling chamber are connected in sequence. Two or more water blowing devices are installed on the fan-shaped section II of the cooling chamber. Low cooling is adopted for the water flow of the crystallizer. The water flow of the inner arc and the outer arc is 2200 L / min. The water flow of the left side and the right side is 1200 L / min. The temperature difference is controlled within the range of 4 DEG C-5 DEG C. Non-sinusoidal oscillation and double-nozzle full-protective casting are adopted. Intercooling is adopted for secondary cooling. The superheat degree of molten steel ranges from 15 DEG C to 30 DEG C. The specific water flow of the secondary cooling zone is 0.8 L / kg.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a special-shaped billet continuous casting machine for the production of special-shaped billets and a secondary cooling water blowing method for the special-shaped billet continuous casting. Background technique [0002] The special-shaped billet integrates the characteristics of square billet, round billet and slab, and the cross-section is particularly complicated and H-shaped. Moreover, the special-shaped billet has a large specific surface area and better heat dissipation conditions than the rectangular billet. The heat dissipation conditions of each point on the cross-section are very different, making the cross-section The temperature difference at each point above is larger than that of the conventional slab, resulting in a large strain force, so it is easy to produce quality defects such as cracks, especially the continuous casting secondary cooling process has a signif...

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Application Information

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IPC IPC(8): B22D11/14B22D11/124
Inventor 孟保仓张怀军陈建新
Owner INNER MONGOLIA BAOTOU STEEL UNION
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