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Tangshan Hongwen cold rolled stainless steel Co., Ltd. was founded in 2006 with a registered capital of 100 million yuan. It is a subsidiary of Tangshan Hongwen industrial group, mainly engaged in stainless steel products, steel products and calendering products. The company is located in the emerging industrial park of Guye District, Tangshan City, with more than 400 employees, including more than 50 technical and management personnel. The company covers an area of about 50000 square meters. The company takes hot-rolled coil as raw material to carry out acid pickling, cold rolling, wet leveling, annealing and hot-dip galvanizing and other deep processing. The overall construction is divided into three phases, with a total investment of about 1 billion yuan. The overall construction scale is 300000 tons of cold-rolled plain carbon (plate) coil, 300000 tons of galvanized civil plate and 250000 tons of cold-rolled non oriented silicon steel. The first phase of the company's project has been completed and put into operation. The main equipment includes: a 1450mm Push-pull Pickling unit and a supporting 4 m3 / H acid regeneration unit, a 1450mm six high single stand reversible cold mill, a full hydrogen bell type bright annealing furnace unit, and a tension leveler rewinding unit; As well as supporting public and auxiliary facilities such as water supply and drainage facilities, thermal facilities, gas facilities, ventilation and dust removal, power supply and distribution, electrical transmission, telecommunications, inspection and testing facilities, etc., have formed an annual output of 600000 tons of pickling coil 200000 tons of cold and hard coil 200000 tons of bright annealing cold-rolled coil. The main equipment of phase I project is designed and manufactured by China metallurgical continuous casting company, China first heavy and other domestic large enterprises with strong technical strength. The push-pull pickling unit adopts six-stage shallow groove turbulent pickling and five-stage forward flow cascade rinsing system. The first phase of the company's project mainly includes the design of 200000 t / a precision longitudinal shear unit, 200000 t / a bright full hydrogen bell type annealing furnace, 200000 t / a flat tension leveler, forming a complete production capacity of 200000 t / a cold-rolled plain carbon (plate) coil. The second phase of the company's project is mainly to develop cold-rolled non oriented silicon steel products, forming an annual capacity of 250000 tons of cold-rolled non oriented silicon steel; it mainly includes two sets of 1450mm12 high single stand reversible cold rolling mill, a continuous annealing production line of non oriented silicon steel and supporting gas desulfurization system. Among them, the production capacity of 12 high single stand reversible cold rolling mill is 300000 tons, which has the advantages of large rolling capacity and strong plate shape control ability. It mainly rolls ultra-thin strip steel and annealed substrate of 0.35mm and 0.50mm silicon steel; the continuous annealing production line of non oriented silicon steel can produce medium brand non oriented silicon steel, with the main varieties of 50w470-50w800, which can be used to manufacture iron core and stator of motor and small-scale Transformer. The third phase of the company's project is mainly to build a 300000 ton production line for galvanizing and continuous return. The production line is equipped with double uncoiler, double shear, vertical looper, electrolytic cleaning device, vertical annealing furnace, zinc pot air knife and sink roll system, leveler, tension leveler, passivation, oiling and coiler. The unit has complete functions and can meet the requirements of different product types. This process adopts the combination of non oxidation and radiant tube heating technology, with fast heating speed and high thermal efficiency. It can effectively improve the surface quality of the product, improve the coating and cold punching performance of the product by setting up a polishing machine. The shape and surface quality of steel strip can be effectively improved by using two bending and one straightening machine or two bending and two straightening and drawing straightening machine. Since its establishment, the company has adhered to the policy of "innovation, dedication, integrity, and pragmatism", adhered to sustainable development, aimed at implementing industrial restructuring and improving competitive advantage, realized process upgrading, product upgrading, improved the company's management level and core competitiveness, built Hongwen brand and built Hongwen image.

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