Zhaijun Wen

Title: Innovations by Zhaijun Wen in Cement Technology

Introduction

Zhaijun Wen is a notable inventor based in Beijing, China, recognized for his contributions to cement technology. He holds two patents that focus on methods for preparing specialized types of cement, showcasing his expertise in the field.

Latest Patents

One of his latest patents is a method for preparing low-background cement. This innovative method involves uniformly mixing a seed crystal of cement, CAF whiskers, and high-magnesium raw material to create a first mixture. The first mixture is then calcined at temperatures between 1400-1500° C. to yield a low-background clinker. The seed crystal of cement is characterized by a specific activity of Ra-226 radioactive nuclides within 50 Bq/kg, and the MgO content of the clinker ranges from 4.0 wt. % to 5.0 wt. %. The high-magnesium raw material used in this process has a MgO content between 2.5 wt. % and 3.0 wt. %.

Another significant patent by Zhaijun Wen is a method for preparing Portland cement that features early strength, low shrinkage, and low heat. This method includes weighing and grinding various slags, such as iron, copper, vanadium, and nickel, to create prefabricated materials. The process also involves mixing mica and kaolinite to obtain aluminous raw materials, which are then combined with the prefabricated slags. The resulting mixture is calcined to yield cement clinker, which is subsequently cooled and ground with gypsum to produce the final Portland cement.

Career Highlights

Zhaijun Wen has worked with prominent organizations in the building materials sector. His first assignee is the China Building Materials Academy Co., Ltd., and his second assignee is the China National Building Material Group Co., Ltd. These affiliations highlight his significant role in advancing cement technology through research and development.

Collaborations

Zhaijun Wen has collaborated with notable colleagues, including Kunyue Zhang and Min Wang. Their combined efforts contribute to the innovative advancements in the field of cement technology.

Conclusion

Zhaijun Wen's work in developing methods for low-background and Portland cement demonstrates his commitment to innovation in the construction materials industry. His patents reflect a deep understanding of material science and engineering, positioning him as a key figure