Efficient continuous casting (high efficiency continuous casting)
a high-efficiency continuous casting technology. Technical and economic indicators in the conventional continuous casting machine: 150mm x 150mm billet casting speed is 2.0m world pie network information . / Min or less; 120mm × 120mm billet 3.0m/min following slab casting, the casting speed is 1.0 ~ 1.2m/min, cast most of the operating rate of 60% to 70%. This national scientific and technological tasks in the 9th Five-Year Plan (1995 ~ 1999), casting to achieve high efficiency, efficient continuous casting. Specific requirements are (1) casting speed: 150mm × 150mm billet ≥ 3.0m/min; 120mm x 120mm billet ≥ 4.2m/min thickness ≥ 180mm slab ≥ 1.8m/min. (2) casting machine operating rate ≥ 85%. (3) slab ≥ 90% defect rate. Billet Caster single-stream output by 5 ~ 80 000 t to 12 150 000 t. And technological tasks from the Continuous Casting Technology, National Engineering Research Center with the relevant scientific research institutes goo school, factory cooperation commitment billet Guangzhou Iron & Steel Co., Ltd., the slab by the Panzhihua Iron and Steel Group Company as a supporting institution. Efficient continuous casting of research includes improving the quality of molten steel; casting process optimization improvements; to improve the crystalline structure and improve the ability to conduct heat; mold oscillation device suitable for high casting speed needs, requires vibration trajectory error is small, smooth motion; cold appropriate strengthening to meet the high casting speed characteristics; single point of straightening straightening system was changed to continuous straightening or two straightening. Other related technologies, including mold powder performance requirements to adapt to the high casting speed conditions, increased automation, rapid replacement of equipment World pipe network reported that the world's steel pipe network to provide the world's steel pipe network editor , such as a series of technical measures. The research goal was completed in 1998 and 1999, efficient billet continuous casting technology has been successful conversion on a continuous casting machine in China more than 10 factories, such as the Capital Iron and Steel Company No.3 Steelmaking Plant, Jinan Iron and Steel Company's first steelmaking implementation of efficient transformation of plants and other continuous casting machine, the casting speed of the continuous casting machine, the operating rate, the quality of slab has the substantial rise in the comprehensive index at or close to efficient research goals. Other indicators also improved accordingly. The annual production of a single stream of continuous casting machine more than 1O million t, output reached 150 000 t of annual flow in the transformation of the No.1 Steelmaking Plant of Jinan Iron and Steel Billet Caster.
international guarantee system has reached a high level of research they have already attained or exceed the target, into the 1990s, the pursuit of continuous casting is also on the international high-speed casting . It is reported that Japan slab caster casting speed ahead in the international arena (see Table 1). The billet continuous casting to improve competition between the pulling speed of the pilot studies and national craze in the 1990s. Has published a number of units in the late 1980s to improve the coverage of the casting speed test and ideas, but with the practical value of industrial production to improve the technical solution of the pulling speed in 1994. Table 2 lists the technical solutions proposed by the professional company of several of the world manufacturing the continuous casting machine and casting speed can reach targets, the proposed technical measures to improve the casting speed is to improve the crystalline structure, improve the ability of the integrated thermal conductivity of the mold, and extending the length of the mold to 900 ~ 1000mm. Demag's technical trial of a factory in Slovakia has been made in performance, the VAI technical measures will be implemented in the steel mills of China's Hangzhou and Wuhan Iron and Steel Company's first steel plant. Some of the design research units and equipment manufacturers have also announced the efficient transformation with high efficiency transformation of technical measures. Transformation of the continuous casting machine and improve production efficiency in China has great economic benefits, more than 300 of China's total continuous casting machine, the total stream flow above 1000, of which more than 200 units of the billet caster, the total units of number 2 / 3, the average Billet Caster flow annual output of 60000 tons, if the efficient transformation of implementation, the total production of billet continuous casting capacity will increase by nearly 100 times, investment in infrastructure costs savings is considerable, the same slab even Cast efficient transformation across the country, its economic benefits are also enormous.