continuous melting,continuous smelting,continuous warm-up,Continuous feeding
Now the vast majority of electric arc steel furnaces are taken to remove the lid, charging stages from the roof, with the material of arc directly to heating furnace steelmaking. EAF steelmaking is the most common cold-loading, and cold loaded into the furnace of the steel material can be divided into artificial loading and mechanical loading; mechanical loading is divided into the trough, hoppers, baskets using equipment different loading and other. At present, widely used in loading or top of the basket. The loading process is: will charge mounted on the bottom of the basket with chains sold live in according to certain requirements. Loading, first lift the lid and the rear of the rotation to the stove or furnace out; then use the crane to basket hanging from the roof into the furnace, and then pull the pin to discharge into the furnace . Which the general loading of 5 to 7 minutes each, so that the electric furnace open lid loading not only scrap and slag generated a lot of dust and dust proliferation, pollution electric furnace surrounding work environment. More important is the loss of large amounts of heat, (information confirmed: just left the finished steel, the furnace temperature up to above 1500 ℃, but the heat soon, within a few minutes, can be reduced to below 800 ℃), so that is bound to extend or increase the subsequent smelting time.
Foreign authoritative information on iron and steel scrap material into the blast furnace preheat temperature of 500 ° C can save power l / 4, while the temperature of 600 ~ 700 ℃, it can save power 1/3, if the temperature reaches 900 ° C. , just when the cold loading the l / 2 power. This means that the transformer input power constant, the melting of the corresponding period will be proportionately reduced. In addition, the hot charging into the furnace can increase the stability of the arc and advance Oxygen flux, also contributed to the melting of the shortening. Hot charging of melting of the short duration of heat and high productivity.
Henan Taihang Lee Group as a whole in the careful study of the world advanced electric furnace steelmaking technology accumulated nearly 10 years of research, the development of continuous steel-making technology and equipment-DP development with Chinese characteristics, scrap preheating furnace continuous loading device, the new steel-making equipment completely changed the conventional electric furnace open the lid top charging operation process. Process procedures are: the use of special online equipment, electric stove in the control of gas at the same time continuously to join the metal raw materials (heavy and light steel scrap, pig iron, HBI, etc.) and preheating (preheating temperature of 400-600 ° C ) process. Can be achieved without opening the lid to join the charge in the electric side of the continuous, the material is directly from the scrap site or rail car loading conveyor. After the scrap is continuously and automatically transported to the furnace, preheating in the furnace exhaust gas in the preheat conveyor. Once preheated, the scrap will be sent to the electric furnace, the molten steel in which the scrap will be continuous melting. Tapping furnace to maintain the 1/3 to 1/2 to stay in the amount of steel, out of steel, immediately after anyone to charge, continue to the next time the smelting. Electrode furnace material, domestic DP for transportation equipment, its main feature is the continuous feeding, continuous warm-up and continuous smelting. It allows continuous flat bath operation, which is a key advantage of its more traditional furnace direct arc steels
Compared with other electric furnace process, the DP family equipment technology has the following obvious advantages: the increase in production (production increase of 8-10%), less power consumption (per tonne of steel energy-saving 80-100KWh / t), less electrode consumption ( AC electric furnace electrode consumption is about 1.5 - 1.6kg / t) dust processing capacity reduced 20% -30%, reduce grid disorder, scrap income increased by about 2%. Less refractory and maintenance costs, lower production costs, the impact on the environment and also to minimize the equipment after a 90-ton electric furnaces in Henan Wuyang Iron and Steel in 2004 the first industrial practice after nearly 10 years of development and improvement of has made in southern Hebei, Hebei Steel, Hubei Huaxin Special Steel, Wuhu Xinxing Ductile Iron Pipes Co., Ltd., Vietnam to DANA-Y Iron and Steel Company, Vietnam, Southeast Asia Iron and Steel, Indonesia's Sumatra Iron and Steel Group Corporation (Growth, Steel Group), and the world's leading Korean Pohang Steel POSCO Group and other companies are widely used.
DP domestic scrap preheating continuous conveyor equipped with a flexible and controllable length (35-65 m), so the equipment for completely get people in the new EAF workshop or the site of the old furnace technology and the transformation, economic efficiency and environmental governance around the outcome of satisfactory results. All are welcome the steelmaking colleagues calls contact to discuss!
Situated in Hebi City of Henan Province, Henan Taihang Quanli (Group) Co., Ltd, the former Hebi General Machinery of Machinery Industry Deparment, is renamed in 2005. The company, as a high-and-new technological company, specializes in the research and development, manufacturing and sales of steel scraps preheating and conveying complete equipment, vibrating machine and environmental protection equipment. Occupied an area of 97 thousand square meter, it possesses over 300 sets manufacturing and inspection equipments. In addition, there are more than 600 employees, 265 of whom are engineering technical personnel in various areas.
Upholding the guiding ideology of "science and technology are the primary productive forces", and sticking to conducting innovations on technology, the company successively sets up enterprise technical center at the province level and engineering research center of electric furnace energy-saving and steel-making equipment of Henan Province as well as other scientific research institutions, and it undertakes over 40 major scientific research projects of the state, province and the city.
DP series steel scraps preheating and conveying complete equipment, the newly developed national patented product, effectively cope with the problems of high consumption and low efficiency for electric furnace steel-making company as well as the problem of serious pollution on environment by applying a series high-and-new technologies as well as methods of waste heat recovery and utilization of electric furnace, preheating and conveying of steel scraps as well as high-temperature smoke and dust purification. In addition to fill the domestic blank and replace imported equipments of this kind, it is listed in the key construction projects of equipment manufacturing industry for the Eleventh Five-year Plan, key research projects on energy-saving technology of Henan Province and the pilot projects of energy-saving and emission-reduction technology of Henan Province.
Our company has developed steel scraps preheating and conveying complete equipment of six specifications, DP15, DP30, DP60, DP70, DP80 and DP100, so various demands on building new electric furnaces and rebuilding old furnaces may be satisfied. Having been widely applied by Wuyang Iron and Steel Co., Ltd., Hebei Yong Yang Iron and Steel Company, in Xining Special Steel Co., Ltd., Wuhu Xinxing Ductile Iron Pipes Co., Ltd., Vietnam DANA-Y Steel Company, India Nisuke Steel Group (PT Growth Sumatra Steel Group), Zhangjiagang Pohang South Korea (ZPSS) Stainless steel companies, the equipment is well received by users and people at all levels of the society due to the excellent economic effectiveness as well as the environmental benefits achieved.
Adhering to the philosophy of "Meeting difficulties, Innovating Continuously", the Company provides excellent quality products and super-value services for users. And we are willing to cooperate with steel-making comp