High-temperature hot dipping method for producing steel strip hot dipped with zinc-base alloy

Abstract

The invention relates to a high-temperature hot dipping method for producing a steel strip hot dipped with zinc-base alloy. When a steel strip is hot dipped with the zinc-base alloy, the working temperature of a dipping solution is controlled between 530 DEG C and 560 DEG C; and the operating power of an air knife blower is adjusted at most to a maximum value within a power interval which cannot initiate a metal flow line of a plate surface. In the invention, the temperature of the dipping solution is set as a value between 530 DEG C and 560 DEG C; at the same time, the operating power of theair knife blower is adjusted for a higher value as much as possible; because a temperature reducing space for the dipping solution of the plate surface is allowed to be greatly enlarged, the operating power of the air knife blower is greatly enhanced, the plating quantity is obviously reduced and zinc consumption is thoroughly reduced; and because the temperature region in which the dipping solution severely corrodes steel is avoided in the temperature range, a borne negative effect is much lower than the benefit retribution obtained due to zinc consumption reduction.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanizing of steel strips, and in particular relates to a production method in which the temperature of the plating solution is different from the original temperature and the operating power of the air knife blower is different from the original operating power in the production of zinc-based alloy hot-dip galvanized steel strips. . Background technique [0002] Zinc is the most consumed metal among the metals used as coating materials, and the zinc used for coating accounts for at least half of the total consumption of zinc. However, zinc resources on the earth are very limited. Foreign scholars predict that the zinc mines on the earth today can only be exploited by humans for 30 to 50 years. Although zinc can be recycled, it cannot be recycled 100%, and some zinc is lost permanently. With the increasing use of zinc, zinc resources are becoming increasingly scarce. In order to delay the fi...

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Problems solved by technology

[0019] The technical problem to be solved by the present invention is to provide a bath temperature range higher than the current bath temperature for the steel strip hot-dip galvanized alloy, and then significantly reduce the amount of coating by greatly increasing the operating power of the air knife blower, saving zinc resources while avoiding large negative effects

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