1938, the bonfire of the Anti-Japanese War burned to Kunming, Dai moved back to Tonghai and sent Yongnian to primary school.
1940 was admitted to Tonghai Middle School for junior high school. The aura of Xiushan and the ancient style of Confucian Temple have influenced the elegance of Dai Yongnian's temperament; The strict teacher's teaching and loving father's care cultivated his enterprising spirit.
1943 In the spring, Dai Yongnian graduated from junior high school, returned to Kunming with his parents, and was admitted to Jianshe Middle School. In autumn, he was admitted to Dayun High School. A year later, because most of Tonghai's students were in Long Yuan Middle School, he transferred to Long Yuan Middle School. 194865438+In February, Dai Yongnian joined the "Yunnan Democratic Youth League" (referred to as "Min Qing") directly led by the Yunnan Underground Party in the Communist Party of China (CPC), and soon became a backbone member, successively serving as the group leader and branch member, secretly organizing the development and progress of young people to carry out revolutionary activities. 1949, 20-year-old Dai Yongnian gloriously joined China. 1September, 949, the Kuomintang authorities began the "September 9 major purge". With the approval of Li Zhimin, the head of the underground party, Tonghai County established a party group headed by Dai Yongnian to carry out urban work. On February 9th, 65438, Lu Han announced the Yunnan Uprising and the peaceful liberation of Tonghai.
195 1 July, Dai Yongnian left school to teach. 1954 went to Zhongnan Institute of Mining and Metallurgy for further study. 1956 after graduation, he went to Kunming university of science and technology to teach, and served as secretary, director and dean of the teaching and research section of metallurgical department. Dai Yongnian believes that teaching and scientific research complement and promote each other, and those who study science and engineering should apply what they have learned and directly serve production. In view of the teaching and scientific research situation at that time, he began to consider expanding the experiment, making the experimental results directly used in production practice and improving the production conditions of the factory. Since then, Dai Yongnian has embarked on a road of scientific and technological innovation. Dai Yongnian teaches tin metallurgy and visits Gejiu factory and mine many times every year. There is lead in tin ore, so lead and tin should be separated when smelting. At that time, lead-tin alloy was mainly treated by "chloride electrolysis" in China. He found that this smelting method has long process, high energy consumption, great pollution and low recovery rate.
1957, a famous Soviet expert gave a lecture at Kunming University of Science and Technology, and introduced his experiment of separating lead-tin alloy by vacuum distillation. Although this experiment is only a small experiment in a miniature electric furnace, this idea broke Dai Yongnian's long-term confusion like lightning, and a new idea sprouted in his mind-vacuum metallurgy! He began to quickly infer that vacuum metallurgy was beneficial to compatibilization. In vacuum, liquid is easy to turn into gas, and the evaporation rate can be increased by about 100 times compared with that under normal pressure, which can reduce vacuum melting temperature, reduce fuel consumption and fundamentally improve workers' working conditions. Vacuum melting can improve product quality and reduce cost. Vacuum melting is beneficial to environmental protection, which makes the metal not easy to oxidize and can greatly improve the recovery rate of metal. There is no emission of waste gas, waste water and waste residue, and there is basically no pollution to the environment ... But in reality, Dai Yongnian is facing a virgin land, with neither systematic vacuum metallurgy knowledge and theoretical works nor vacuum metallurgy experimental equipment. What the Soviet professor said was only to provide the possibility of laboratory testing. To continue to explore means taking a road that no one has ever taken.
1958, with the support of school leaders, Dai Yongnian established the first vacuum metallurgical experimental group in China.
1979, the furnace with a daily processing capacity of 2 tons was successfully developed, and it was successfully applied to industrial production after being appraised by Yunnan Metallurgical Bureau, replacing the traditional process. On 1979, this new technology won the fourth prize of scientific and technological progress of the Ministry of Metallurgical Industry of China, and the corresponding equipment "internally heated multistage continuous distillation vacuum furnace" won the fourth prize of national invention on 1987, and won the national invention patent. At present, more than 30 vacuum furnaces have been used in more than 20 provinces such as Yunnan, Guangxi, Hunan, Hubei, Anhui, Guangdong, Liaoning, Gansu and Jiangxi.
From 65438 to 0992, Dai Yongnian began to pay attention to the research on vacuum refining technology of lithium, a new pollution-free energy material. Lithium is a rare metal called "an important element to promote the progress of the world" and has a wide range of uses. After more than three years of experiments, it was successful and won the national invention patent. 1989, the "Vacuum Metallurgy Laboratory" he presided over was renamed "Vacuum Metallurgy and Materials Research Institute". He led his colleagues to creatively research, design and build 15 large, medium and small vacuum furnaces for school teaching and scientific research.
1999165438+10, 70-year-old Dai Yongnian was awarded as an academician of China Academy of Engineering, which was the greatest affirmation and highest praise from the party and people for his lifelong contribution to society, continuous innovation and continuous ascent.