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Purification method of zinc alloy slag

A purification method and zinc alloy technology, which is applied in the field of metallurgy, can solve the problems of high labor intensity, low metal recovery rate, and high operating temperature, and achieve the effects of fast evaporation, high alloy recovery rate and product purity, and improved quality

Active Publication Date: 2019-02-15
福建龙翌合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process of zinc extraction technology has long process, high operating temperature, high energy consumption, low metal recovery rate, and high labor intensity of workers. It is necessary to make innovative improvements for these process defects.

Method used

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  • Purification method of zinc alloy slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for purifying zinc alloy slag, comprising the following steps:

[0021] Step 1: Heat the collected zinc alloy slag to 700°C in a furnace, and then cool down to 480°C after it is completely melted, and keep it warm for 4 hours to obtain a molten liquid, which is filled with argon as a protective gas during the melting process;

[0022] Step 2: separating the scum and the zinc alloy liquid in the molten liquid obtained in the step 1 by a siphon method to obtain the separated zinc alloy liquid and the separated scum;

[0023] Step 3: Put the separated zinc alloy liquid obtained in step 2 into a vacuum distillation furnace with a vacuum degree of 55 Pa, heat the temperature in the vacuum distillation furnace to 650°C, and add 0.5% ammonium chloride of the quality of the zinc alloy liquid Perform chlorination to remove impurities, raise the melting temperature to 1250°C, and keep it warm for 1 hour to obtain surface scum and zinc alloy liquid;

[0024] Step 4: Put ...

Embodiment 2

[0027] A method for purifying zinc alloy slag, comprising the following steps:

[0028] Step 1: Heat the collected zinc alloy slag to 750°C in a furnace, and then cool down to 530°C after it is completely melted, and keep it warm for 5 hours to obtain a molten liquid, which is filled with argon as a protective gas during the melting process;

[0029] Step 2: separating the scum and the zinc alloy liquid in the molten liquid obtained in the step 1 by a siphon method to obtain the separated zinc alloy liquid and the separated scum;

[0030] Step 3: Put the separated zinc alloy liquid obtained in step 2 into a vacuum distillation furnace with a vacuum degree of 75 Pa, heat the temperature in the vacuum distillation furnace to 720°C, and add 0.6% ammonium chloride of the quality of the zinc alloy liquid Perform chlorination to remove impurities, raise the melting temperature to 1280°C, and keep it warm for 2 hours to obtain surface scum and zinc alloy liquid;

[0031] Step 4: Put...

Embodiment 3

[0034] A method for purifying zinc alloy slag, comprising the following steps:

[0035] Step 1: Heat the collected zinc alloy slag in a furnace to 800°C, and then cool down to 550°C after it is completely melted, and keep it warm for 6 hours to obtain a molten liquid, which is filled with argon as a protective gas during the melting process;

[0036] Step 2: separating the scum and the zinc alloy liquid in the molten liquid obtained in the step 1 by a siphon method to obtain the separated zinc alloy liquid and the separated scum;

[0037] Step 3: Put the separated zinc alloy liquid obtained in step 2 into a vacuum distillation furnace with a vacuum degree of 100 Pa, heat the temperature in the vacuum distillation furnace to 800°C, and add 0.7% ammonium chloride of the quality of the zinc alloy liquid Perform chlorination to remove impurities, raise the melting temperature to 1300°C, and keep warm for 3 hours to obtain surface scum and zinc alloy liquid;

[0038] Step 4: Put t...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to a purification method of zinc alloy slag. The method comprises the following steps that the collected zinc alloyslag is heated in a smelting furnace to 700 DEG C-800 DEG C until the slag is totally smelted, then the slag is cooled to 480 DEG C-550 DEG C, heat is preserved for 4-6 h, a molten solution is obtained, the siphonic method is adopted for separating the molten solution into floating slag and zinc alloy liquid, the zinc alloy liquid is put into a vacuum distillation furnace, the temperature in the vacuum distillation furnace is heated to 650 DEG C-800 DEG C, ammonium chloride is added for impurity removal, the melting temperature is raised to 1250 DEG C-1300 DEG C, heat is preserved for 1-3 h, the surface floating slag and the zinc alloy liquid are obtained, the obtained floating slag is collected, smelting and purifying are carried out again, zinc alloy liquid obtained after secondary purification and the zinc alloy liquid are mixed and filtered, and placed into a cooler to be cooled, and a zinc alloy ingot is obtained. The method has the advantages that operation is easy, the impurities are removed thoroughly, and purity of a zinc alloy is high.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for purifying zinc alloy slag. Background technique [0002] Zinc alloy is an alloy composed of zinc and other elements. Often added alloying elements are aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys. Zinc alloy has low melting point, good fluidity, easy welding, brazing and plastic processing, corrosion resistance in the atmosphere, and the residual waste is easy to recycle and remelt; but the creep strength is low, and after a certain period of time, it is easy to cause natural creep to cause size changes. Zinc alloys can be divided into deformation and casting zinc alloys according to the processing technology. Cast zinc alloy has good fluidity and corrosion resistance, and is suitable for die-casting instruments, automobile parts casings, etc. [0003] After the zinc alloy is put into use, there will be leftover zi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C18/00C22B7/00
CPCC22B7/004C22C1/02C22C18/00Y02P10/20
Inventor 王聪哲黄焰锋
Owner 福建龙翌合金有限公司