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Method for producing zinc bismuth multicomponent alloy used for hot dip galvanizing of steel and iron members

A technology for multi-component alloys and steel components is applied in the production field of zinc-bismuth multi-component alloys used for hot-dip galvanizing of steel components, which can solve the problems of affecting alloy composition, large fluctuation of alloy composition, inability to set stirring devices, etc. The effects of stable composition, high utilization rate of alloying elements, and clean and environmentally friendly production process

Active Publication Date: 2005-08-17
株洲冶炼集团有限责任公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production method of hot-dip galvanized alloy is generally smelted in an earthen smelting furnace or a reverberatory furnace at one time. Because the stirring device is usually a steel structure, it will be melted into the material during high-temperature smelting to affect the alloy composition. The smelting equipment is usually The stirring device cannot be installed, so the material cannot be stirred during the smelting process, resulting in poor alloy quality of the obtained product, large fluctuations in alloy composition, poor use of the alloy, high melt viscosity and zinc on the surface of the coating during hot-dip galvanizing flow, zinc nodules, burrs, etc.
The energy used is coal or heavy oil, which seriously pollutes the environment and poor operating conditions for workers
In the production process of the newly invented zinc-bismuth multi-element alloy, many ingredients are added, and the rare earth metal is easy to be burned, so the intermediate alloy must be smelted step by step, and the quality of the obtained product can be guaranteed by stirring at the same time during the smelting process. Existing production methods cannot meet its requirements

Method used

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  • Method for producing zinc bismuth multicomponent alloy used for hot dip galvanizing of steel and iron members

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of production method of zinc-bismuth multi-element alloy, its production steps are:

[0020] Step 1: Add 85% (wt) solid aluminum and 15% (wt) solid rare earth metal RE into an induction furnace directly heated by an electric field and use a zinc block as a core, heat up to a melting temperature of 750°C, and keep warm for 30 Minutes, while stirring for 8 minutes, the preparation of Al-15% rare earth metal RE master alloy;

[0021] Step 2: When 90% (wt) of the zinc ingot is melted to a temperature of 650°C in the smelting equipment, 3% (wt) of the Al-15% rare earth metal RE master alloy obtained in step 1 is added for neutralization, and then added 2.0% (wt) pure nickel material and 5% (wt) bismuth ingot, smelting for 12 minutes;

[0022] Step 3: adding refining agent to the material obtained in step 2 at 600° C. according to a conventional method, making slag and refining, removing the slag and casting it into a zinc-bismuth multi-element alloy master alloy ingo...

Embodiment 2

[0025] A kind of production method of zinc-bismuth multi-element alloy, the produced zinc-bismuth multi-element alloy is composed of its production steps as follows:

[0026] Step 1: Add 85% (wt) solid aluminum and 15% (wt) solid rare earth metal RE into a coreless induction furnace with alternating electric and magnetic fields, heat up to a melting temperature of 850°C, and keep it warm for 30 minutes. Stir for 20 minutes to prepare Al-15% rare earth metal RE master alloy;

[0027] Step 2: When 96% (wt) of the zinc ingot is melted to a temperature of 550°C in the smelting equipment, 2% (wt) of the Al-15% rare earth metal RE master alloy obtained in step 1 is added for neutralization, and then added 2% (wt) bismuth ingot, smelting for 20 minutes;

[0028] Step 3: adding refining agent to the material obtained in step 2 at 700° C. according to a conventional method, making slag and refining, removing the slag and casting it into a zinc-bismuth multi-element alloy master alloy ...

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Abstract

The present invention relates to production of zinc alloy. The technological scheme of producing Zn-Bi alloy includes first compounding intermediate alloy with alloy ingot and RE ingot at the smelting temperature of 750-850 deg.c, subsequent smelting zinc ingot at 550-650 deg.c and adding nickel material and final adding bismuth ingot to form the polynary Zn-Bi alloy. The said process can avoid the burning loss of RE metal to avoid waste, may have certain amount of Al-RE intermediate alloy added to form different alloys, and has smelting and stirring time over 15 min to reach effect of homogeneous mixing. The present invention uses preferably inducing furnace as smelting apparatus and the product has stable and homogeneous alloy element components, high alloy element utilization and clean and environment friendly production process.

Description

technical field [0001] The invention relates to a production method of a zinc alloy, in particular to a production method of a zinc alloy used for hot-dip galvanizing. Background technique [0002] At present, the production method of hot-dip galvanized alloy is generally smelted in an earthen smelting furnace or a reverberatory furnace at one time. Because the stirring device is usually a steel structure, it will be melted into the material during high-temperature smelting to affect the alloy composition. The smelting equipment is usually The stirring device cannot be installed, so the material cannot be stirred during the smelting process, resulting in poor alloy quality of the obtained product, large fluctuations in alloy composition, poor use of the alloy, high melt viscosity and zinc on the surface of the coating during hot-dip galvanizing Flow, zinc tumor, burr and other problems. The energy used is coal or heavy oil, which seriously pollutes the environment and the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C18/00
Inventor 刘朗明匡立春张伟王全刘斌
Owner 株洲冶炼集团有限责任公司
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