A continuous casting and rolling system for steel bars and a continuous casting and rolling production method for steel bars

Abstract

The invention discloses a steel bar continuous casting and rolling system, and further discloses a steel bar continuous casting and rolling production method. The steel bar continuous casting and rolling system comprises a smelting furnace, a front liquid box, a double-roller casting and rolling unit, a slitting unit, a slitting guide and a finish rolling unit; the smelting furnace communicates with the front liquid box in a sealed mode through a flow guiding groove; the double-roller casting and rolling unit, the slitting unit, the slitting guide and the finish rolling unit are sequentially arranged on the rear portion of the front liquid box; the double-roller casting and rolling unit comprises an upper casting and rolling roller, a lower casting and rolling roller, and a casting nozzle;the casting nozzle is in sealed connection with a liquid outlet of the front liquid box, and the upper casting and rolling roller and / or the lower casting and rolling roller are water-cooled combinedcasting and rolling rollers. Cooling and temperature decreasing are achieved by forming one or more water cooling tanks. In this way, high-temperature alloy molten steel flowing out from the front liquid box enters the double-roller casting and rolling unit, the temperature is quickly decreased while casting and rolling forming is achieved, the shape of a steel billet is quickly fixed, after thesteel billet is subjected to micro rolling deformation, it is ensured that molten steel in the core part is solidified and the billet material structure is dense, and it is ensured that the shape andthe size of the steel billet are precise.

Description

technical field [0001] The invention relates to the technical field of steel casting and rolling, in particular to a continuous casting and rolling system for steel bars and a production method for casting and rolling steel bars using the continuous casting and rolling system for steel bars, aiming at reducing the production cost of steel bars and developing high-quality and high-performance steel bars. Background technique [0002] In recent decades, the iron and steel industry at home and abroad has been developing new technologies around saving energy, improving production efficiency, and improving product quality, so as to achieve the goal of long-term and continuous energy saving and quality improvement. Iron and steel casting and rolling technology, as a near-net-shape casting technology that directly casts the shape, size and quality as close as possible to the final product, has been the dream goal of metallurgists and materials scientists for more than a century. ...

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Problems solved by technology

[0006] After the 1980s, with the rise of research on twin-roll thin strip continuous casting technology in foreign countries, my country has restarted the research work in this area, and built successively in Northeast Institute of Technology, Northeastern University, Shanghai Iron and Steel Research Institute, Baosteel and other units. Several experimental researches on casting and rolling production lines have achieved some results, but they are still in the experimental stage, and there is still a big gap compared with foreign advanced levels.

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