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A kind of method for preparing zinc-manganese master alloy

A technology of master alloy and zinc-manganese, applied in the field of preparing zinc-manganese master alloy, can solve the problems of affecting the scope of use, affecting the service life of the furnace, low manganese content of the zinc-manganese master alloy, etc.

Active Publication Date: 2019-06-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The molten mixed salt on the surface of the zinc liquid can isolate the air to prevent the oxidation and volatilization of zinc, but the addition of molten salt will affect the service life of the furnace
In addition, when prepared by the molten salt covering method, the melting temperature cannot exceed the boiling point of zinc, and the manganese content of the prepared zinc-manganese master alloy is low, which affects its application range.

Method used

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  • A kind of method for preparing zinc-manganese master alloy
  • A kind of method for preparing zinc-manganese master alloy

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: prepare the zinc-manganese master alloy containing 5wt% manganese, its preparation steps are: at first the metal bulk zinc and 100 mesh powder manganese that are configured according to the target ratio are charged in the intermediate frequency furnace (6) through the furnace cover (1) , open the valve (8) and gate (9) of the furnace body; then open the pressure reducing valve (3) of nitrogen, the pressure control of nitrogen is 0.2MPa, the air in the furnace body is purged, and the air in the furnace body is removed Then close the furnace cover (1), valve (8) and gate (9); when the furnace temperature rises to 700°C, adjust the pressure reducing valve of the nitrogen tank so that the furnace is at a high pressure of about 2MPa; then continue Raise the temperature to 800°C and keep it warm for 1 hour to ensure that all the manganese diffuses into the zinc solution. Then reduce the melt temperature to 500°C, close the nitrogen pressure reducing valve (3), o...

Embodiment 2

[0024] Embodiment 2: prepare the zinc-manganese master alloy containing 10wt% manganese, the preparation steps are: firstly, the metal bulk zinc and 100 mesh powder manganese configured according to the target ratio are loaded into the intermediate frequency furnace (6) through the furnace cover (1) , open the valve (8) and gate (9) of the furnace body; then open the pressure reducing valve (3) of nitrogen, control the pressure of nitrogen to 0.2-0.3MPa, purge the air in the furnace body, and remove the clean furnace Then close the furnace cover (1), valve (8) and gate (9); when the temperature in the furnace rises to 700°C, adjust the pressure reducing valve of the nitrogen tank so that the furnace is at a high pressure of about 5MPa; Then continue to heat up to 900°C, and keep it warm for 1 hour to ensure that all the manganese diffuses into the zinc solution. Then lower the temperature of the melt to 600°C, close the nitrogen pressure reducing valve (3), open the valve (8),...

Embodiment 3

[0025] Embodiment 3: preparation contains the zinc-manganese master alloy of 20wt% manganese, and its preparation step is: at first the metal bulk zinc and 100 mesh powder manganese that are configured according to the target ratio are charged in the intermediate frequency furnace (6) through the furnace cover (1) , open the valve (8) and gate (9) of the furnace body; then open the pressure reducing valve (3) of nitrogen, control the pressure of nitrogen to 0.2-0.3MPa, purge the air in the furnace body, and remove the clean furnace Then close the furnace cover (1), valve (8) and gate (9); when the furnace temperature rises to 700°C, adjust the pressure reducing valve of the nitrogen tank so that the furnace is at a high pressure of about 10MPa; Then continue to heat up to 1000°C, and keep it warm for 1 hour to ensure that all the manganese diffuses into the zinc solution. Then reduce the temperature of the melt to 650°C, close the nitrogen pressure reducing valve (3), open the...

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Abstract

The invention provides a preparation method of zinc-manganese intermediate alloys with the high manganese content. An airtight smelting furnace is pressurized, and the pressure in the furnace is kept in the high pressure state, so that the boiling point of zinc is increased, and the maximum boiling point of molten zinc can be controlled to be about 1,100 DEG C. The method comprises the specific production steps as follows: firstly, metal zinc and manganese which are allocated in proportion are heated to 700 DEG C, then the pressure inside the furnace is increased to 1-10 MPa by the aid of nitrogen, the temperature is continuously increased to 800-1,000 DEG C and is kept for a period, and the metal manganese diffuses into the molten zinc. Finally, the temperature inside the furnace is reduced to below 700 DEG C, the pressure inside the furnace is reduced to be the atmospheric pressure, a zinc-manganese alloy liquid is stirred slightly, scum on the surface is skimmed, and then pouring can be performed. With the method, the boiling point of the zinc can be increased, so that the smelting temperature of the zinc-manganese alloys can be increased, volatilization of the zinc in the preparation process can be reduced, and the various zinc-manganese intermediate alloys with the manganese content ranging from 5.0wt% to 20.0wt% can be prepared accurately.

Description

technical field [0001] The invention relates to a method for preparing an alloy, in particular to a method for preparing a zinc-manganese master alloy. Background technique [0002] Zinc-manganese master alloy can be used as hot-dip galvanizing to regulate the manganese content in the zinc solution, and can also be used to configure other alloys containing zinc and manganese elements. Due to the large difference in the melting and boiling points of metallic zinc and manganese, the melting point and boiling point of pure Zn are 419.6°C and 907°C, respectively, and the melting point of metallic manganese is 1246°C. The melting points of the two metals differ considerably, and the melting point of manganese is higher than the boiling point of zinc. When preparing a zinc alloy with a high manganese content, a higher melting temperature is required, and the melting temperature may be close to or higher than the boiling point of zinc, which may easily cause the volatilization of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/00C22C1/02C22C1/03
CPCC22C1/02C22C1/03C22C18/00
Inventor 曾建民王友彬罗立张锐
Owner GUANGXI UNIV