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Dazhao Group also owns the process technology and equipment of three active lime production lines: rotary kiln, sleeve kiln and double-chamber kiln. It has developed its own active lime production line with a daily output of 200 tons to 1200 tons, and has a high reputation and influence in the field of active lime.

1. The rotary kiln

preheater-rotary kiln-cooler process has the characteristics of:

--large system production capacity, low energy consumption

--high product activity, stable quality, etc.

2. The annular sleeve kiln

sleeve kiln process has the characteristics of small area, low investment and high operating efficiency.

3. Double-chamber kiln Double-chamber

kiln uses two chambers to operate alternately, making full use of heat energy, high lime activity, simple refractory materials, low exhaust gas, dust and temperature, and light environmental pollution.

 Dashi Group Co., Ltd.(formerly China Metallurgical Equipment Nanjing Company) was founded in 1978. It is a large-scale engineering technology company integrating engineering design, technology research and development, equipment manufacturing, complete equipment and general engineering contracting. It is the vice president unit of the Metallurgical Equipment Branch of the China Iron and Steel Industry Association, the vice president unit of the Jiangsu Province Metallurgical Industry Association, and the president unit of the Equipment Branch of the Jiangsu Province Metallurgical Industry Association. It is a national-level high-tech enterprise and a "specialized and innovative" enterprise. Possess engineering design and engineering general contracting qualifications. In recent years, it has mainly won honorary titles such as "National Advanced Collective of Steel Industry","National Special Award for Outstanding Achievements in Enterprise Culture","National Pioneer of Workers","National Advanced Enterprise Trade Union","Civilized Unit of Jiangsu Province", and "Jiangsu Province May 1st Labor Award".

● On April 3, 1978, the Ministry of Metallurgical Industry and the Revolutionary Committee of Jiangsu Province agreed to establish Jiangsu Province Metallurgical Parts Company (also known as Jiangsu Parts Management Office of the Ministry of Metallurgical Industry).
● On June 27, 1978, the Jiangsu Parts Management Office of the Ministry of Metallurgical Industry was renamed the Jiangsu Equipment Manufacturing Management Office of the Ministry of Metallurgical Industry, and the Jiangsu Province Metallurgical Parts Company was renamed the Jiangsu Province Metallurgical Equipment Manufacturing Company accordingly.
● On July 16, 1987, the Establishment Committee of Jiangsu Province recognized the "Jiangsu Metallurgical Equipment Manufacturing Company" and its 93 staff members approved by the Ministry of Metallurgical Industry in 1978.
● On April 22, 1990, the Ministry of Metallurgical Industry changed the affiliation of Jiangsu Metallurgical Equipment Manufacturing Company to a company under the leadership of China Metallurgical Equipment Corporation, and at the same time revoked the name of Jiangsu Equipment Manufacturing Management Office of the Ministry of Metallurgical Industry.
● On May 16, 1991, the Ministry of Metallurgical Industry approved: With the approval of the National Cleanup and Rectification Company Leading Group, the original Jiangsu Metallurgical Equipment Manufacturing Company was retained. It was renamed China Metallurgical Equipment Nanjing Company when approved and registered by the State Administration for Industry and Commerce... China Metallurgical Equipment Nanjing Company (deputy division level) management organization.

● On May 17, 2004, China Metallurgical Equipment Nanjing Company was restructured into China Metallurgical Equipment Nanjing Company.

● On July 9, 2007, China Metallurgical Equipment Nanjing Co., Ltd. changed its name to Jiangsu Dahao Group Co., Ltd.

● On April 15, 2015, with the approval of the State Administration for Industry and Commerce and registration by the Jiangsu Province Administration for Industry and Commerce, Jiangsu Dayu Group changed its name to Dayu Group, and Jiangsu Dayu Group Co., Ltd. changed its name to Dayu Group Co., Ltd.

Dahao Group Co., Ltd. was established in 1978 and was originally affiliated to the Ministry of Metallurgical Industry of the State. In 2004, it was successfully transformed into China Metallurgical Equipment Nanjing Company, and later renamed Dahao Group Co., Ltd. It is a large-scale engineering technology company integrating engineering technology research, design and development, equipment manufacturing, and engineering construction. It has engineering integration and integration capabilities based on core technologies and key equipment manufacturing, and specializes in providing advanced energy conservation and emission reduction to domestic and foreign steel companies. Technology, equipment and engineering general contracting services.

 Dazhao Group is a member unit of China Iron and Steel Industry Association, a vice president unit of the Equipment Branch of China Iron and Steel Industry Association, a vice chairman unit of the Jiangsu Province Metal Society, and a chairman unit of the Equipment Branch of the Jiangsu Province Metallurgical Industry Association. It has been awarded the title of "A" supplier of Baosteel for many consecutive years.

As a high-tech enterprise, it has dozens of series of patents and proprietary technologies. Participated in the compilation of national-level and industry-level standards and specifications, and is the main drafting unit of the national standards "Explosion-proof Safety Procedures for Blush Coal Injection Systems in Blast Furnace (GB16543 -2008)","Explosion-proof Guidelines for Dust Collectors Used in Dust Explosion Hazardous Places (GB/T17919-2008)" and the industry standard "Technical Regulations for the Application of Slag Powder for Cement Products (JC/T2238-2014)" issued by the Ministry of Industry and Information Technology.

The group company pays attention to independent technological progress and technology research and development, and has established cooperative relationships with metallurgical colleges and universities and research institutes for talent training, technology development and other cooperative relationships. It is an internship training base for postgraduate students at Jiangxi University of Technology and Nanjing Institute of Engineering, and also cooperates with Jiangsu University and Anhui University of Technology. The University of Technology jointly holds master's degree in engineering in metallurgical engineering, automation, civil engineering, etc. It has carried out industry-university-research cooperation with research institutes such as Southeast University, Northeastern University, Nanjing Engineering College, Metallurgical Technology Institute of the Iron and Steel Research Institute, Nanjing University of Science and Technology, Henan University of Science and Technology, Nanjing University of Aeronautics and Astronautics, Anhui University of Technology, Wuhan Institute of Safety and Environmental Protection, and has achieved obvious results in research and development in various fields of metallurgical engineering. Most of the results have been formed into products. These results have been systematically integrated and applied in the company's various system projects.

The group focuses on the construction of corporate culture and has won many awards such as the "National Outstanding Achievement Award in Corporate Culture","Advanced Unit in China's Corporate Culture Construction","Best Employer Enterprise in China", and "Entrepreneur Who Pares Most Attention to Employee Development". "Family culture" is the prerequisite and guarantee for the harmonious development of the group. Each employee is recognized and respected to make harmony real and effective, which enhances the social evaluation of the company and the employees 'sense of professional sublime.

"" means that when mountains and mountains are parallel, the mountains are higher than the mountains. This is the pursuit of the company group. The group company has played an important role in product structure adjustment, energy conservation and emission reduction in my country's metallurgical industry. Provide high-quality and comprehensive engineering technical services to customers at home and abroad, and make unremitting efforts to build an environmentally friendly and resource-saving harmonious society.

Engineering design: complete professional design and strong technical force. It has professional design talents in technology, equipment, electricity, automation, instrumentation, civil engineering, water supply and drainage, heat energy, ventilation, etc. Provide professional designs for domestic and foreign metallurgical enterprises including mining and dressing, smelting, rolling, environmental engineering, lithium battery new energy, clean energy, energy conservation and emission reduction (consumption reduction), etc. The engineering professional fields include mineral processing, sintering, oxidation pellet, blast furnace coal injection, blast furnace water slag powder, lithium battery new energy, flue gas desulfurization (denitrification, dechlorination), electric furnace steelmaking (including refining, continuous casting), rotary kiln, double chamber kiln, sleeve kiln lime roasting, hot metal pretreatment, environment and public works, Industrial and civil buildings, etc., play a very important and prominent position in the field of my country's metallurgical industry.

Equipment manufacturing: Dayu Group Liyang Metallurgical Engineering Technology Co., Ltd. is the main processing and manufacturing base of the group company. Located in Liyang Tianmu Lake Development Zone, it covers an area of about 60 acres and has a factory building area of about 30,000 square meters. It has strong equipment research and development and manufacturing capabilities. It has production, manufacturing and management capabilities centered on large-scale equipment processing, large-scale mechanical parts, component assembly, large-scale shell welding, steel structure manufacturing, special material welding, etc.

 Engineering construction: The engineering construction company under the group has a well-known new force in on-site construction and has cultivated a team of engineering construction talents with excellent style and superb skills. Carry out professional contract construction for metallurgical engineering, electromechanical installation engineering, construction engineering, steel structure, kiln engineering, etc.; have professional construction capabilities in large-scale equipment installation, pipeline installation, boiler installation, lifting machinery equipment installation, commercial concrete pre-mixing, etc.; Carry out professional contract construction of overseas projects, and have rich experience in civil construction, installation and debugging, and actual production operations of factories and equipment.