Since the first half of 2016, with the fluctuation of China's steel and coke prices, the domestic and international market environment has undergone profound changes. As an export-oriented steel enterprise, Shandong Guanxian Changfa Board Co., Ltd. (hereinafter referred to as Changfa Board) In response to this situation, with innovation as the guide, the company has invested in the production of aluminum-zinc-silicon-silicon production lines, using new technologies to manufacture new products and positioning the high-end market, adding new impetus to the long-term development of Changfa Board.
As an aluminum-zinc production line project with less investment from domestic steel plate manufacturers, especially the 55% aluminum-resistant fingerprint-coated aluminum-zinc plate production enterprises are among the few in the country. Changfa Board's aluminum-zinc-zinc production line adopts the international advanced hot-dip aluminum-zinc production process. Compared with the galvanizing process, the aluminum-zinc solution has a higher melting point, and the temperature of the aluminum-zinc solution in the zinc pot reaches 600°C or higher. The surface of the reduced pure iron combined with aluminum and zinc forms an aluminum-zinc-iron alloy annual coating with stronger adhesion. According to the customer's requirements, the post-processing section can also achieve passivation, fingerprint resistance and oiling treatment to enhance the corrosion resistance of the product. The composition of the galvanized steel plate is composed of 55% aluminum and 43.4% zinc and 1.6% silicon, respectively. The production process is similar to that of the galvanized sheet process, and is a continuous molten coating process. Under the same external environmental conditions, the 55% aluminum-zinc alloy coated galvanized sheet has stronger corrosion resistance than the galvanized sheet, and has excellent adhesion and flexibility for processing color coated products. The superior use performance makes the galvanized sheet become the popular hot new product in the international steel plate market.
In order to achieve the combination of quality and efficiency, the Changfa board aluminum-zinc production line is equipped with a reduction method bright horizontal annealing furnace, using the new energy-saving radiant tube technology for indirect heating, uniform heating, good plate shape, overcoming the difficulty of producing thin plates for most domestic units. Insufficient. The unit return furnace also uses light fiber as the inner lining, which is quick to build the furnace and has low thermal inertia. The steel strip cooling system in the furnace adopts a protective gas circulation cooling device, and the frequency conversion is adjusted, and the cooling speed is fast and uniform. In order to enhance the degreasing effect, the new line adopts the advanced and practical combination of chemical degreasing and electrolytic degreasing, which effectively removes the oil stain and iron powder on the strip surface; in particular, it is necessary to use the waste heat/tail developed by the unit. The heat comprehensive recovery system makes full use of the waste heat of the annealing furnace and the tail heat of the flue gas to provide heat source for the cleaning section, hot air drying and passivation drying, and truly achieves the unification of environmental protection, energy saving and cost reduction.
In order to achieve refined production, the Changfa board aluminum-zinc production line adopts the advanced air knife developed by Jiangyin Huada Coating Equipment Factory. The coating thickness is uniform and the zinc layer is controllable, which can meet the diversified needs of customers in different regions. When dealing with the surface properties of the product, the four-roll finishing machine can effectively improve the surface quality of the product, eliminate the yield platform and improve the cooling performance of the product. At the same time, the two-bend two-stretch bending straightening machine can effectively improve the strip shape. And surface quality. In order to ensure high-quality products, each production process strictly controls the quality, and the layers are checked to ensure the final product quality. The thickness of the product produced ranges from 0.15 to 1.0 mm. The width can range from 700mm to 1250mm. There are four kinds of zinc flower types such as ordinary zinc flower, small zinc flower, smooth zinc flower and zinc-free flower. The thickness of the zinc layer is 20-150 g/m*m (double-sided aluminum-zinc-silicon).
The commissioning of the galvanized line of Changfa Board indicates that the Guan County Fine Steel Industry Base has added a new athlete and added new vitality to the northern coating industry, especially the galvanizing industry.
