Zn-Al-Mg-RE zinc ingot preparation method

A technology of zinc ingots and zinc pools, which is applied in the field of preparation of quaternary alloy zinc ingots, can solve the problems of inability to add rare earth elements well, does not conform to industrialized mass production, Mg elements and rare earths are prone to spontaneous combustion, etc., to avoid oxidation And the effect of spontaneous combustion phenomenon, reduction of preparation cost and good economic prospect

Active Publication Date: 2012-07-25
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) Mg elements and rare earths are prone to spontaneous combustion at higher temperatures, which brings trouble and danger to the preparation of zinc ingots, which is the second key technology for the preparation of zinc ingots
The disadvantage of this method is that the zinc layer on the surface of the rare earth has been dissolved in the zinc solution before the rare earth is completely dissolved, so the purpose of adding rare earth elements to the zinc solution cannot be well achieved
(3) Put Zn, Mg, RE and other elements into a vacuum induction furnace for vacuum melting. The disadvantage of this method is that the preparation is troublesome, the cost is high, and it does not meet the requirements of industrial mass production

Method used

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  • Zn-Al-Mg-RE zinc ingot preparation method
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  • Zn-Al-Mg-RE zinc ingot preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) prepare Zn-9.5wt%-5wt% La ternary master alloy:

[0023] Table 1. Raw materials used in Zn-9.5wt%Al-5wt%La ternary master alloy

[0024] the element

Zn

Al

La

Weight (g)

1323

147

83

[0025] Materials used: Zn purity 99.99%, La purity 99%, Al purity 99.99%. The preparation process is as follows: First, polish off the oxide skin on the surface of 1323g pure zinc, and then put it into a high-purity graphite crucible in a resistance furnace for heating. The furnace temperature is set at 450°C, and the heating rate is about 7°C / min. Finally, set the furnace temperature to 500°C, add 147g of pure aluminum polished on the surface, let it stand for 40 minutes, set the furnace temperature to 540°C, and then put 83g of rare earth whose surface scale has been polished clean. Because the density of the rare earth is greater than that of the zinc liquid containing aluminum, the rare earth sinks into the zinc liquid, thereb...

Embodiment 2-3

[0046]The content of each element in the Zn-Al-Mg-La quaternary alloy zinc ingot prepared by Example 2-3 of the present invention is the same as that of Example 1, so the addition amount of raw materials is also the same, and the addition steps of each element are also the same, only the preparation The temperature control in the process is slightly different, and the specific parameters are shown in Table 5. What needs to be understood is that according to the needs of actual production and application, the content of each element in the Zn-Al-Mg-La quaternary alloy zinc ingot can be adjusted differently.

[0047] Table 5. The temperature control parameter of embodiment 2-3

[0048]

[0049] The experimental results found that the absorption rates of Al, La, and Mg are very similar, and the results are omitted here. The difference is that the temperature is lower and the dissolution rate is slightly slower. From an industrial point of view, in order to obtain high efficien...

Embodiment 4

[0064] (1) prepare Zn-9.5wt%-5wt%Ce ternary master alloy:

[0065] Table 8. Raw materials used in Zn-9.5wt%Al-5wt%Ce ternary master alloy

[0066] the element

Zn

Al

Ce

Weight (g)

1323

147

83

[0067] Materials used: Zn purity 99.99%, Ce purity 99%, Al purity 99.99%. The preparation process is as follows: First, polish off the oxide skin on the surface of 1323g pure zinc, and then put it into a high-purity graphite crucible in a resistance furnace for heating. The furnace temperature is set at 450°C, and the heating rate is about 7°C / min. Finally, set the furnace temperature to 500°C, add 147g of pure aluminum polished on the surface, let it stand for 40 minutes, set the furnace temperature to 540°C, and then put 83g of rare earth Ce whose surface scale has been polished clean, At this time, since the density of the rare earth is greater than that of the zinc liquid containing aluminum, the rare earth sinks into the zinc ...

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Abstract

The invention discloses a Zn-Al-Mg-RE zinc ingot preparation method which comprises the following steps: preparing a Zn-Al-Mg-RE ternary intermediate alloy; adding pure Mg in a zinc tank, and dissolving the pure Mg completely; then adding the prepared Zn-Al-RE ternary intermediate alloy in the zinc tank containing the pure Mg, and standing until the Zn-Al-RE ternary intermediate alloy is dissolved completely; and finally pouring a Zn-Al-Mg-RE zinc ingot in a finished product mold. A Zn-Al-Mg-RE quaternary alloy zinc ingot is prepared with low cost rapidly and conveniently by adopting the preparation method, and the yields of Mg and RE elements are improved greatly.

Description

technical field [0001] The invention relates to a method for preparing a zinc ingot, in particular to a method for preparing a quaternary alloy zinc ingot. Background technique [0002] For a long time, steel has been widely used as the main structural material in many fields. However, the fatal shortcoming of steel is that it is prone to rust and fail in corrosive media. In order to improve the corrosion resistance of steel parts, coating a layer of zinc or zinc alloy coating on the outside of steel parts has become the most important method to prevent corrosion of steel substrates. The development of coating has gone through several stages such as pure zinc coating, Zn-Al coating, Zn-Al-Mg coating and so on. Relevant literature shows that the corrosion resistance of Mg-containing coatings is several to twenty times that of pure zinc coatings. [0003] Before galvanizing, it is necessary to prepare zinc ingots. There are two advantages to preparing zinc ingots in advance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C18/04
Inventor 储双杰李保平王俊钱洪卫刘昕胡成杰
Owner BAOSHAN IRON & STEEL CO LTD
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