Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing aluminum powder from aluminum/aluminum alloy

A technology of aluminum alloy and aluminum powder, which is applied in the field of powder preparation, can solve the problems of decreased purity, low production efficiency, easy oxidation or nitriding of aluminum powder, etc., and achieve the effect of wide source of raw materials, small particle size and high purity

Inactive Publication Date: 2020-02-28
NORTHEASTERN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the atomization method is that the production efficiency is low, the yield of ultrafine powder is not high, the surface of the aluminum powder is easily oxidized or nitrided, and the produced aluminum powder contains alumina or aluminum nitride, which leads to a decrease in purity. It is easy to introduce oxygen and nitrogen impurities during use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing aluminum powder from aluminum/aluminum alloy
  • Method for preparing aluminum powder from aluminum/aluminum alloy
  • Method for preparing aluminum powder from aluminum/aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Melt aluminum at a temperature of 700°C and cast it into an aluminum plate as the anode plate and install the anode guide rod; melt high-purity aluminum at a temperature of 700°C and cast it into an aluminum plate as the cathode plate and install the cathode guide rod Rod; high-purity aluminum with a purity of over 99.99%;

[0045] NaCl, KCl and AlCl 3 Dry separately to remove water, and then mix evenly to make a ternary molten salt electrolyte; the ternary molten salt electrolyte contains AlCl by mass percentage 3 65%, NaCl 20%, the rest is KCl; the temperature for drying to remove moisture is 100°C, and the time is 10h;

[0046] Put the ternary molten salt electrolyte in the electrolytic cell; heat the ternary molten salt electrolyte until it melts to form an electrolyte molten salt; install the anode plate and the negative plate in the electrolytic cell; The plate and the cathode plate apply direct current for electrolysis, the electrolysis temperature is 100°C, an...

Embodiment 2

[0050] Method is with embodiment 1, and difference is:

[0051] (1) Melt the aluminum alloy at a temperature of 1200°C and cast it into an aluminum alloy plate; the aluminum alloy is an aluminum-copper alloy containing 55% Al by mass percentage; melt and cast high-purity aluminum at 1200°C to make an aluminum plate as cathode plate;

[0052] (2) The ternary molten salt electrolyte contains AlCl by mass percentage 3 6%, NaCl 25%, the rest is KCl; the temperature of drying to remove moisture is 120°C, and the time is 9h;

[0053] (3) Electrolysis temperature 110°C, anode current density 10mA / cm 2 , the electrolytic pole distance is 30mm; after the aluminum in the anode plate enters the electrolyte molten salt in the form of aluminum ions, a hole-like structure is formed on the surface of the anode plate; the metal copper falls off from the anode to form copper powder; after 20 hours of electrolysis, replace the new anode plate;

[0054] (4) After 10 hours of electrolysis, ta...

Embodiment 3

[0056] Method is with embodiment 1, and difference is:

[0057] (1) Melt and cast aluminum at a temperature of 750°C to make an anode plate; melt and cast high-purity aluminum at 750°C to make an aluminum plate as a cathode plate;

[0058] (2) The ternary molten salt electrolyte contains AlCl by mass percentage 3 70%, NaCl 15%, the rest is KCl; the temperature for drying to remove moisture is 140°C, and the time is 8h;

[0059] (3) Electrolysis temperature 120°C, anode current density 90mA / cm 2 , electrolytic pole distance 10mm;

[0060] (4) After 7 hours of electrolysis, take out the cathode plate with the aluminum powder aggregate attached.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

A method for preparing aluminum powder from aluminum / aluminum alloy comprises the following steps that (1) the aluminum or aluminum alloy is melted and cast to be prepared into an anode plate, and high-purity aluminum is melted and cast to be prepared into a cathode plate; (2) NaCl, KCl and AlCl3 are dried and then mixed to be prepared into a ternary fused salt electrolyte, or NaCl, KCl, LiCl andAlCl3 are dried and then mixed to be prepared into a quaternary fused salt electrolyte; and (3) the fused salt electrolyte is placed in an electrolytic cell to be heated to be melted, the anode plateand the cathode plate are mounted, powering on is carried out for electrolysis, the aluminum enters electrolyte melted salt in the form of ions and is separated out on the cathode plate; and (4) the cathode plate is taken out and washed, the electrolyte is dissolved in water, aluminum powder aggregate enters a chloride solution, residues are subjected to vacuum drying after filtering and separating are carried out, ball milling is carried out, and the aluminum powder is prepared. The aluminum powder prepared through the method is high in purity, small in granularity and wide in raw material source; and the surface of the aluminum powder contains no oxygen, nitrogen and other impurity elements.

Description

technical field [0001] The invention belongs to the technical field of powder preparation, and in particular relates to a method for preparing aluminum powder by using aluminum / aluminum alloy as a raw material. Background technique [0002] Aluminum powder is widely used in various fields due to its high activity, high combustion value, and large specific surface area; in the aerospace field, aluminum powder can shorten ignition delay time, reduce combustion rate pressure index, and improve propulsion The combustion stability of the agent; for industrial explosives, adding nano-aluminum powder to the explosive can increase the explosion speed of the explosive; in the field of construction, aluminum powder can be used as a gas generating agent for concrete to reduce the quality of concrete; another main use of aluminum powder It is an important metal pigment for the preparation of aluminum pigments. It is mainly used in the production of coatings, inks, and plastics. It has b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/04C25C7/02
CPCC25C5/04C25C7/005C25C7/025
Inventor 王耀武桓书星彭建平狄跃忠
Owner NORTHEASTERN UNIV