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Slag-free plating furnace for hot galvanizing or zinc-aluminum alloy and using method

A zinc-aluminum alloy, hot-dip galvanizing technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems of reducing the service life of zinc pot, high cost of hot-dip galvanizing, saving use cost, The effect of reducing accumulation and good stability

Pending Publication Date: 2019-06-11
安徽省力通稀土钢缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The formation of slag in the galvanizing process of existing plating pots is caused by the following two problems. The formation of slag in the plating solution is mainly due to the fluidity formed when the iron content dissolved in the plating solution exceeds the solubility at this temperature. For extremely poor zinc-iron alloys, the zinc content in the slag can be as high as 94-97%. Secondly, the zinc on the surface of the bath is oxidized by the air to form oxides, which are also the main components of the slag. This is the key to the high cost of hot-dip galvanizing. At the same time The formation and precipitation of slag greatly reduces the service life of the zinc pot

Method used

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  • Slag-free plating furnace for hot galvanizing or zinc-aluminum alloy and using method
  • Slag-free plating furnace for hot galvanizing or zinc-aluminum alloy and using method
  • Slag-free plating furnace for hot galvanizing or zinc-aluminum alloy and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1 to Figure 2 As shown, a slag-free hot-dip galvanizing or zinc-aluminum plating furnace includes a plating pot 1 filled with molten zinc solution, a plating piece 8, a slag stirring device 2, a pre-plating heat treatment device 3 and a tensioning device ;

[0037] A gas shield 4 is fixedly installed on the top surface of the plating pot 1, and an inert gas is filled between the gas shield 4 and the zinc liquid surface to prevent the zinc on the surface of the zinc liquid from being oxidized, ensure the maximum utilization of the zinc liquid, and greatly reduce the zinc The amount of slag produced. The inside of plating pot 1 is longitudinally provided with partition wall 5, the left side of partition wall 5 is hot-dip zone 11, the right side of partition wall 5 is plating slag melting zone 12, the bottom of hot-plating zone 11 and the slag melting zone 12 The bottom is connected. In the hot-dip area 11, a hot-dip roll 6 for tensioning the plated part...

Embodiment 2

[0047] Such as Figure 5 with Figure 7 As shown, in this implementation, preferably, the angle between the bottom surface of the slag plating groove 121 and the bottom surface of the hot-dip zone 11 is 15 degrees. The residence time of the bottom surface of the hot-dip zone 11 is about 150 seconds, and no accumulation layer will be formed on the bottom surface of the hot-dip zone 11. The dross flow rate under this angle is faster than that in Example 1, and the dross enters the inside of the slag-plating groove 121 along the gap, and no zinc dross is found to touch the separation wall 5, and the zinc dross in the slag-plating groove 121 Virtually no impact.

Embodiment 3

[0049] Such as Image 6 with Figure 7 As shown, in this implementation, preferably, the angle between the bottom surface of the slag plating groove 121 and the bottom surface of the hot-dip zone 11 is 30 degrees. The residence time of the bottom surface of the zone 11 is about 130 seconds, and no accumulation layer will be formed on the bottom surface of the hot-dip zone 11, but the depth of the plating pot 1 needs to be greatly increased at this time, which will cause an increase in construction cost. The zinc slag has a small impact when passing through the gap at the bottom of the separation wall 5, and the relatively fast flow rate of the zinc slag will have a certain impact on the zinc slag in the slag plating groove 121, but it does not affect the electromagnetic stirrer 23 on the zinc slag. Remelting efficiency of zinc in slag.

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PUM

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Abstract

The invention discloses a slag-free plating furnace for hot galvanizing or zinc-aluminum alloy and a using method, and belongs to the technical field of slag-free plating furnaces. The slag-free plating furnace is provided with a plating boiler, a plating slag stirring device, a pre-plating heat treatment device and a tensioning device. An isolation wall with a plating solution backflow hole is arranged inside the plating boiler and divides the plating boiler into a hot plating area and a plating slag melting area, the bottom face of the plating slag melting area is provided with a plating slag groove, the included angle between the bottom face of the hot plating area and the plating slag groove is set to 10-30 degrees, the top face of the plating boiler is provided with a gas protection cover, the space between the top face of the plating boiler and the liquid surface of a plating solution is filled with inert gas to protect the plating solution against oxidation, and the plating slagstirring device is arranged on the gas protection cover on the top of the plating slag meting area and used for stirring plating slag in the plating slag groove to enable plating solution main materials to be melt back to the plating solution for secondary hot plating utilization. The plating slag generation amount can be effectively controlled, the accumulation amount of plating slag in the bottom face of the plating boiler is greatly reduced, hot plating materials are utilized to the maximum, and the using cost of the plating solution is saved.

Description

technical field [0001] The invention belongs to the technical field of slag-free plating furnaces, and in particular relates to a slag-free hot-dip galvanizing or zinc-aluminum plating furnace and a use method. Background technique [0002] Zinc-aluminum ash slag not only seriously affects the quality of the galvanizing layer, causes the coating to be rough, produces zinc or aluminum bumps, but also greatly increases the cost of hot-dip galvanizing or aluminum. Usually, 30-60kg of zinc is consumed per 1 ton of workpiece to be plated. If the zinc ash plating slag is serious, the zinc consumption will be as high as 100-150kg, which will greatly increase the cost of zinc use. [0003] The formation of slag in the galvanizing process of existing plating pots is caused by the following two problems. The formation of slag in the plating solution is mainly due to the fluidity formed when the iron content dissolved in the plating solution exceeds the solubility at this temperature. ...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/36
Inventor 徐德贵章兆俭
Owner 安徽省力通稀土钢缆有限公司