How did Zheng Jiuqiang turn himself into a good piece of steel?

He pioneered the low-alloy steel smelting operation method, which created economic benefits of more than 8 million yuan that year after being promoted throughout the factory; he promoted the continuous reduction of steel rolling costs by adjusting the process, and the degree of improvement reached the industry-leading level. ; He summarized advanced operating methods, which increased the age of the converter from 6,000 furnaces to more than 17,000 furnaces, creating an annual benefit of more than 20 million yuan; he also promoted cleaner production and achieved a secondary energy utilization rate of 70%.

He is Zheng Jiuqiang, known as "China's No. 1 Steelmaker".

In 1989, Zheng Jiuqiang, who graduated from Tangshan Iron and Steel Technical School, was assigned to the converter workshop of the then Tangshan Iron and Steel No. 1 Steelmaking Plant. Due to his diligence and studiousness, Zheng Jiuqiang became the director of a steelmaking furnace in just three years, breaking the record of 10 years required to train a furnace director.

In 1999, the steelmaking plant underwent technical transformation and replaced the small converter with a 150-ton oxygen top-to-bottom blowing converter. This was the steelmaking equipment with the largest capacity and the most advanced technology in Hebei Province at that time. The factory handed over the heavy responsibility of technical research to Zheng Jiuqiang.

In those days, Zheng Jiuqiang had to study the relevant information and procedures for the production of 150-ton converters during the day, go to other units to observe the production operations of similar converters, and learn the operating essentials, and study "Steelmaking Principles" and "Steelmaking" at night. 500 Questions" and other books. He went to bed at 2 a.m. and woke up at 6 a.m. every day. In the last week, he even lived in a factory. The hard work paid off, and 21 days later, he produced the first batch of steel in the new converter.

In 2002, Zheng Jiuqiang participated in the "National Steel Industry Steelmaking Vocational Skills Competition". He not only memorized several steelmaking professional books designated by the organizing committee, but also took down more than 10 reading notes. At the competition site, Zheng Jiuqiang observed the flame and molten steel level in the furnace and visually inspected the furnace temperature accurately, and finally won the title of "National Steelmaking Champion".

As a steelmaking expert and model worker, Zheng Jiuqiang deeply feels that technology alone is not enough, and it is also necessary to improve the gold content of products through technological innovation. In recent years, he has applied for 4 national invention patents including "A deoxidation process to reduce the consumption of deoxidizer for aluminum-killed steel".

He devoted himself to studying new steelmaking operation models and provided high-quality, low-cost molten steel for the smelting of silicon steel, automotive steel, weathering steel and other high value-added and profit-creating products. With the continuous improvement of product quality, the hot-rolling department's product efficiency has been significantly enhanced, achieving a profit of 340 million yuan in 2014.

In order to break through the technical bottleneck in the transition from empirical steelmaking to scientific steelmaking, Zheng Jiuqiang used the steelmaking expertise he learned to summarize the "324" steelmaking operation method. After the operation method was fully promoted , ending the steelmaking plant’s more than 50-year history of relying solely on experience to make steel.

With the development of the steel industry and the improvement of steelmaking technology, new problems continue to appear in steelmaking production, and the problems are becoming more and more difficult. But steel-like strength flows in the steelmaker's blood, and Zheng Jiuqiang never admits defeat.

The double-slag operation method is a new production process promoted in the industry in recent years. The dephosphorization efficiency is difficult to grasp, and technical problems such as iron beads in the slag arise one after another. However, compared with conventional smelting processes, slag production is Zheng Jiuqiang was deeply attracted by the "temptation" brought about by the substantial reduction in material consumption and steel material consumption.

Zheng Jiuqiang observed the temperature of molten steel in the converter through a steel-making mirror

At the beginning of 2017, Zheng Jiuqiang summarized the high-efficiency dephosphorization technology and rapid pouring technology in the early stage of double slag smelting through innovative process paths and strengthened process control. Advanced technologies such as slag technology and reducing the content of iron beads in the double slag dumping process have enabled the early dephosphorization rate to reach more than 60%, with annual benefits of 13 million yuan.

In October 2017, Zheng Jiuqiang adjusted the converter slag system based on the actual production of the 150-ton converter, and summarized the advanced operation method of "slag making, slag adjustment, and slag splashing". After this method was used in production, the age of the converter increased from 6,000 furnaces to more than 17,000 furnaces, ranking among the top three in the country. Moreover, the entire furnace service does not require repairs. It not only saves more than 1,000 tons of repairing materials every year, but also squeezes It saves more than 100 hours of steelmaking time and creates more than 20 million yuan in benefits every year.

After several years of careful training, the steelmaking technology level of Zheng Jiuqiang's group has been significantly improved. Everyone can make more than 20 kinds of steel. The converter workshop has completed the transformation from "manual steelmaking" to " The magnificent transformation of "intelligent steelmaking". Zheng Jiuqiang also made suggestions to the company to further improve the treatment of operational skills talents, so that skilled workers no longer have the traditional concept of "becoming a senior technician is enough".

Zhang Jun is a model worker in the steelmaking plant led by Zheng Jiuqiang. Zheng Jiuqiang taught him step by step how to control the position of the oxygen lance and how to judge the temperature, composition and other steelmaking operating techniques. As long as Zhang Jun was operating, he would stand aside and guide. If there is splashing, help him analyze it and find out the cause. Slowly, Zhang Jun's operational level continued to improve. Four years later, Zhang Jun grew up to be a steelmaking furnace director. The steelmaking team he led had the lowest consumption of steel materials in the history of the converter workshop.

Today, three people in the hot rolling department have become national-level technical experts, more than ten people have become provincial and municipal-level technical experts, one person has become a provincial-level model worker, and two people have become national-level model workers in the metallurgical industry.

After serving as vice chairman of the labor union, Zheng Jiuqiang’s vision has become broader. He strengthened communication with pioneers by participating in various activities. "Our innovation studio always focuses on what we do. But after communicating with colleagues, we found that they have already formed a standard work model." Zheng Jiuqiang said. Now, Zheng Jiuqiang and his team have started to improve and improve the various processes of the innovation studio, such as setting, reporting, patent application, and summary, to form a standardized operating model - as long as front-line workers operate according to the standards set by the studio , can all reach "high level".

“Responsibility is motivation. No matter what position I hold, I must be committed to the front line and to the employees.” Zheng Jiuqiang said. (