Rizhao Iron and Steel Co., Ltd. is located in the beautiful coastal city of Shandong Province - Rizhao, is located in the eastern end of the New Asia-Europe Continental Bridge, and Japan, South Korea, across the sea from the company by the Hebei Jinghua Innovation Group, Shandong Lai Steel Group and the Hong Kong Goodwill into the development of the company with the construction of the company ****. In order to respond to the national metallurgy and steel industry industrial policy, to take the "double high" road of enterprise development, the company introduced the Italian company Danieli advanced H-beam steel production equipment. The annual production capacity of the first phase of the project is 2.8 million tons of steel, and now it has formed a scale of 1.2 million tons of steel and 800,000 tons of H-beam, with an annual output value of more than 3 billion yuan. Its leading product H-beam is one of the ten technological progress products promoted by the state during the fifteenth period, divided into HW, HM, HN and other series, with specifications of H100mm-H350mm. H-beam, as an economic cross-section steel, is widely used in industrial and civil construction, railway bridges, municipal construction, nuclear industry, shipbuilding, aerospace industry, petrochemical industry, highway, and many other fields. and many other fields. The company adheres to the belief of "advancing with the times, earnestly seeking truth, unity and cooperation, happy steelmaking", and strives for the future with fearlessness, innovation and enterprising spirit, insists on taking the road of specialized production, and makes every effort to make the enterprise stronger and bigger. In addition to relying on the unique geographical conditions of Rizhao Port, the company's core competitiveness consists of highly efficient operation mechanism; excellent and advanced management concepts of decision makers; pragmatic, simple and effective management system; and many years of experience in the operation of iron and steel enterprises. We emphasize the enterprise tenet of "honesty, high quality, high efficiency and innovation", strive for survival by quality and development by credibility, fully implement the requirements of ISO9000 series quality management system and ISO14000 series environmental management system, take the initiative to integrate into the world trend, pay close attention to the global market, and do our best to build the brand of RISCO and the characteristics of RISCO. Rizhao Steel is one of the first batch of enterprises of the Ministry of Commerce. Rizhao Steel is one of the first batch of iron ore import qualified enterprises approved by the Ministry of Commerce, and in recent years, it has signed long-term strategic cooperation agreements on iron ore import with the world's largest iron ore suppliers such as Rio Tinto and BHP of Australia, and CVRD of Brazil, etc. In 2004, the company passed the IS09001 quality certification and the ISO14000 environmental management system certification; and in 2005, it obtained the production license issued by the State Administration of Quality Supervision and Inspection (AQSIQ). In 2005, the company obtained the production license issued by the State General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ), and in December 2006, the AQSIQ issued a medal in the Great Hall of the People, awarding the title of National Inspection-free Products. The sinter plant can produce 15 million tons of sinter ore and 1.5 million tons of pellet ore annually. The ironmaking plant can produce 7.5 million tons of iron annually. The blast furnace roof equipment all adopts PW bell-less roof, the furnace front adopts same side hydraulic mud gun and hydraulic opening machine, and the fan adopts axial flow compressor. The coal injection system adopts two medium-speed mills with a production capacity of 33 tons/hour and a coal injection capacity of 150 kg per ton of iron. The steel mill can produce 7.5 million tons of billets annually. In addition to ordinary carbon steel, high-quality carbon steel and low-alloy high-strength steel, the mill also produces low-carbon steel, pipeline steel up to X65 and weather-resistant steel. H-beam plant has one H-beam production line, which can produce 1.3 million tons of H-beam and I-beam of 19 specifications in three series of HW, HM and HN annually, among which the H192×198 light thin-walled H-beam fills the blank in China. The bar factory has one bar production line and one coil production line, which can produce 1.2 million tons of national standard, Japanese standard and British standard Φ12-40mm ribbed steel bars and Φ16-50mm round steel, and can also produce high-strength tertiary rebars. There are three high-speed wire rod production lines in the high-speed wire rod plant, which can produce 3 million tons of Φ5.5-16mm smooth wire rod and Φ6.0-14mm rebar, and the steel grades are carbon structural steel, high-quality carbon structural steel, low alloy steel, cold heading steel, welding rod steel, spring steel, alloy structural steel, and steel for the production of high strength three-grade rebar. steel, spring steel, alloy structural steel, etc., and the finished products are all formed in one fire. The strip mill has a 1580mm hot rolled coil production line, which can produce 2.5 million tons of coil with width of 700-1430mm and thickness of 1.2-16mm. The steel grades of plates are mainly ordinary carbon structural steel, high-quality carbon structural steel and low-alloy high-strength structural steel. The company fully implements ISO9001 quality management system, ISO14000 environmental management system and employee health and safety system standards, and there are 113 full-time product inspectors, with Japanese Rigaku X-ray fluorescence spectrometer, Swiss ARL direct-reading spectral analyzer, microcomputer-controlled electro-hydraulic servo universal testing machine and other experimental equipment, which can be used to carry out the inspection of 16 kinds of chemical compositions of pig iron, billet and steel, Mechanical properties, surface quality inspection and testing. The company implements the informationization driven strategy, and makes great efforts to establish and improve the sales network, at present, the products have been sold all over the country, and some of them have been exported to Southeast Asia, the Middle East and Canada and other countries and regions. On May 16, 2008, Rizhao Iron & Steel Group donated RMB 100 million to the earthquake-stricken areas, becoming one of the largest private enterprises in the mainland at that time, and setting an example for the enthusiasm of donations from all over the world at that time. As of June 6, 2008, Rizhao Iron and Steel General **** to the disaster area donated nearly 180 million, in addition to the deployment of personnel (clampers, electricians) rushed to the scene of the disaster area to implement the reconstruction work. In the Rizhao Steel living area Rufeng Haiyun yard set up "Wellness Home", a separate two buildings, well-decorated, specialized in receiving children in the disaster area, equipped with professional teachers and well-being of mothers, for the children in the disaster area to do their best. Affected by the economic downturn of the situation, the company's performance has declined significantly, a serious loss, November 7, 08, Rizhao Iron and Steel and Shandong Iron and Steel signed a restructuring of the letter of intent, Rizhao Iron and Steel facing the fate of the restructuring of the mountain steel. Shandong Rizhao Iron and Steel Co., Ltd. thermal regenerative step-beam heating furnace engineering contract, the heating furnace using separated air, gas double preheating thermal regenerative burner, this burner uses ceramic honeycomb body as a heat storage body, air heat storage room and gas heat storage room is separated from the configuration of the air, gas flow in the furnace diagonal cross mixing. The burner is equipped with a door for the heat storage body, it is very convenient to load and unload the heat storage body; the amount of air and gas in the burner can be adjusted, and the structure of the burner takes into full consideration of the sealing and installation and use of the problem. The heat transfer capacity of the honeycomb body is 4 to 5 times larger than the small ball, the airflow resistance is only 1/3 of the small ball, the heat transfer characteristics of the honeycomb body and resistance characteristics are significantly better than the small ball, so the honeycomb body heat storage room is small in size, the burner is compact, easy to lay out and install in the furnace, taking up little space on both sides of the furnace.
The heating furnace uses a small three-way valve. Realize the air, gas system decentralized reversing, decentralized reversing due to the reversing valve near the burner, the reversing valve and the burner between the connecting pipeline is short and small, so the reversing of the furnace intermittent combustion time is short, the furnace temperature and pressure fluctuations are small, small three-way valves with the corresponding valves supporting, when a valve failure, you can not stop the furnace overhaul. Reversing valve reversing action time is less than 2 seconds, reversing fire time is less than 2 seconds, and is equipped with travel switches and directional signs to facilitate operation. At the same time, the reversing valve runs smoothly. Safe and reliable, flexible reversing, at present, this small three-way valve has been successfully applied in Hongdu Steel Pipe Plant, Lai Steel Forging Plant, Jiangxi Xinyu Steel Plant, plate heating furnace, Qingdao Steel, the second wire rod plant, Anyang Plate Plant, Nanjing Plate Plant, JISCO, a small, smelting steel 850, Fushun even-heat furnace, the big steel even-heat furnace, Kunshan Steel, four-roll heating furnace reversing device is also used in a small three-way valve.