In the 21st century, the development environment of the world steel industry has undergone profound changes. The decline in the quality of iron-making raw materials, the rising prices of resources and energy, and the reduction of carbon dioxide emissions have placed more stringent requirements on various processes in steel manufacturing. Looking into the new century, steel technology is a technology that can adapt to such environmental changes and comprehensively respond to resource, energy and even environmental problems. In short, the comprehensive utilization of secondary energy and waste gas in various links is an essential measure for energy saving, consumption reduction, pollution reduction and clean production. As a result, advanced steel technologies such as blast furnace TRT technology, dry quenching technology, dry granulation method, coal humidity control technology, SCOPE21 coking technology and environmentally friendly sintering technology have emerged. Blast furnace TRT technology TRT technology is an energy recovery device that uses a turbine expander to work in front of a pressure reducing valve to convert the pressure energy and heat energy of coal gas into mechanical energy and drive a generator to generate electricity. TRT does not need to burn during operation, does not change the original blast furnace gas quality and normal use, but it recovers considerable energy (approximately 30% of the energy required by the blast furnace gas blower), and also has purified gas to reduce noise and improve The role of gas stove top pressure control quality. Even more valuable is that it does not generate new pollution itself, and the cost of generating electricity is extremely low. Therefore, TRT is a typical high-efficiency energy-saving and environmental protection device. At present, with the development of blast furnaces toward large-scale and high-pressure furnace tops and the application of dry dust removal devices, TRT is also developing in the direction of dry and wet-type axial flow reaction. CDQ technology CDQ technology uses inert gas circulation to recover the sensible heat of hot coke. The sensible heat is recovered and the high-temperature, high-pressure (or medium-temperature and medium-pressure) steam is generated by the waste heat boiler. In the coking production process of iron and steel enterprises, this steam can be used as a heat source for steel plants to generate electricity. And can avoid dust and mist containing toxic and harmful substances to cause pollution to the atmospheric environment. In addition, it can also improve the intrinsic quality of coke, reduce the blast furnace coke ratio by 2% to 2.5%, and increase the output of pig iron by 1%. Therefore, it has become a project encouraged by the state. Dry granulation The dry granulation method can provide us with a new idea of ​​metallurgical slag treatment. The dry treatment method can comprehensively utilize the slag and the thermal energy contained therein. The traditional blast furnace slag treatment methods mainly include dry slag cooling method and water flushing method. Both of these methods have the disadvantages of consuming large amounts of water, polluting groundwater sources, releasing harmful gases, and cannot utilize the slag's sensible heat. For this reason, people have developed this blast furnace slag treatment method. Coal moisture control technology This process is a new technology that has significant energy-saving effects, improves coke oven production capacity, improves coke quality, and stabilizes coke oven production. Advantages of this technology: Coal moisture adjustment technology can reduce the moisture of coal entering the furnace, control its moisture at an appropriate target value, reduce the heat consumption of coking, increase the density of coal entering the furnace, and improve the quality of coke. SCOPE21 Coking Technology SCOPE21 coking technology was jointly developed by the Japan Coal Utilization Comprehensive Center and the Japan Iron and Steel Alliance from 1994 to 2008, which lasted 14 years, that is, a high-yield, pollution-free large-scale coke oven in the 21st century. This technology is a new process that effectively uses coal resources, improves productivity, and realizes environmental / energy-saving technological innovation. On May 30, 2008, Nippon Steel Corporation Oita Plant No. 5 coke oven was officially put into production as the first equipment of the world's latest coking technology SCOPE21. The SCOPE21 production process is to quickly heat the coking raw coal before the coke oven is charged to improve the coke quality, and at the same time it can greatly reduce the coking time (dry distillation time). As a result, it is expected to expand the application range of low-grade coal and achieve energy saving. Environmentally friendly sintering technology The Eposint sintering exhaust gas circulation system developed by Siemens VAI and the MEROS new exhaust gas dry dust removal system developed by Siemens VAI can achieve the purpose of cleaner production in the sintering workshop. This process can make the content of dust, acid gas and harmful metals and organic compounds in the waste gas of the sintering plant much lower than that of the traditional waste gas treatment technology. At present, although the world's steel industry has not yet produced breakthrough production technologies, including a new generation of iron-making and steel-making technologies, many countries and steel companies continue to develop various production technologies that meet the needs of the environment and users. The focus is mainly on energy saving, emission reduction, cost reduction, and improving the competitiveness of enterprises. Napkin Paper,Serviette Napkin,Bathroom Tissue Paper,Premier Tissue Paper DONGGUAN YEE HUP TRADING CO,.LTD , https://www.yeehupack.com