Method and device for environment-friendly batch high-performance alloy hot-dip plating

Abstract

The invention belongs to the technical field of hot dip galvanizing, and discloses a method and device for environment-friendly batch high-performance alloy hot-dip plating. The device comprises a transfer waiting area, a heating area, an after-plating turnover area, a zinc pot and a conveying device, wherein a first closed space is arranged in the transfer waiting area, and the first closed spacecan be filled with inert gas; the heating area is arranged on the down stream of the transfer waiting area, and a second closed space capable of being filled with inert gas is arranged in the heatingarea, the second closed space can be selectively communicated with the first closed space, and a heating device is arranged in the second closed space; the after-plating turnover area is arranged onthe down stream of the heating area, a third closed space is arranged in the after-plating turnover area, and the third closed area can be selectively communicated with the second closed space; the zinc pot is arranged in the heating area and used for zinc or zinc-based alloy hot-dip plating of a to-be-processed workpiece; the conveying device is configured to convey the to-be-processed workpieceinto the transfer waiting area, the heating area, the zinc pot and the after-plating turnover area in sequence in a sealed state. On the basis without a plating assistant agent, the workpiece is subjected to zinc or zinc-based alloy hot-dip plating, and batch zinc or zinc-based alloy hot-dip plating can be achieved.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing, in particular to a batch method and equipment for environmentally friendly hot-dip high-performance alloys. Background technique [0002] Batch hot-dip galvanizing refers to the batch hanging plating of steel components and products of various shapes. The above-mentioned steel components may include steel structures, guardrails, steel pipes, electrical fittings, fasteners and various miscellaneous items. [0003] At present, the batch hot-dip galvanizing method is mainly the solvent method (also known as the dry method). The solvent method is a method of hot-dip galvanizing after the surface of the workpiece is derusted, dipped in zinc-ammonia type flux and dried. The specific process is as follows: derusting—water washing—helping plating—drying—hot dip galvanizing—post-treatment. The principle of the solvent method is to clean the surface of the steel component, dip it in a solvent...

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Problems solved by technology

[0004] 1. Environmental pollution: A large amount of zinc fume will be generated when the flux on the surface of the workpiece reacts with the high-temperature zinc solution, and a large amount of zinc ash will be formed at the same time as the zinc fume is generated, resulting in increased zinc consumption and increased cost

[0005] 2. Low production efficiency: it takes time to dry the workpiece and heat up to the hot-dip process temperature, so the production efficiency cannot be improved

[0006] 3. High production cost: Since most of the existing solvent-based hot-dip galvanizing is heated by an open system, the heat dissipation on the surface of the zinc pot causes a large amount of energy loss; in addition, because the workpiece is heated by the zinc liquid, it takes a long time to soak in the zinc pot , excessive reaction of zinc and iron, resulting in a large amount of zinc slag, together with zinc ash produced by flux and surface oxidation, has caused excessive zinc consumption

Therefore, high energy consumption and high zinc consumption lead to high production costs, low product profits, and poor competitiveness

[0007] 4. The existing solvent hot-dip galvanizing can only realize hot-dip galvanizing, and cannot hot-dip other zinc-based alloys

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