Surface modification method for spherical superfine aluminum powder and modification equipment for surface modification method

A surface modification, aluminum powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of uneven packaging of organic films, large demand for organic reagents, harsh reaction conditions, etc., to achieve simple structure, low cost, Effects with low environmental requirements

Active Publication Date: 2017-06-20
HENAN YUANYANG POWDER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the existing methods of wrapping films on the surface of aluminum powder particles are chemical methods, immersing flake aluminum powder in organic reagents. This method requires a large amount of organic reagents, harsh reaction conditions, and long reaction time. Uneven wrapping of organic film

Method used

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  • Surface modification method for spherical superfine aluminum powder and modification equipment for surface modification method
  • Surface modification method for spherical superfine aluminum powder and modification equipment for surface modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , figure 2 Shown, a kind of surface modification method of spherical ultrafine aluminum powder, weighing aluminum powder and modifier by mass ratio, described modifier is liquid modifier, and the mass ratio of modifier and aluminum powder is 0.5 : 100, the weighed aluminum powder and liquid modifier are sprayed under the protection of inert gas respectively. During the convective spraying process, the atomized liquid modifier is wrapped on the surface of the atomized aluminum powder particles to form a core / shell structure The composite particle structure realizes the surface modification of aluminum powder, and then, the inert gas dedusts and recycles, and the modified aluminum powder settles and is classified before storage. Described modifying agent is liquid modifying agent and is stearic acid.

[0026] A spherical ultrafine aluminum powder surface modification equipment, comprising a mixing tower 1, an aluminum powder tank 2, a modifier storage ...

Embodiment 2

[0029] Repeat Example 1 with the following differences. In this example, the mass ratio of the liquid modifier to the aluminum powder is 0.1:100, and the liquid modifier used is sodium oleate.

Embodiment 3

[0031] Repeat Example 1 with the following differences. In this example, the mass ratio of the liquid modifier to the aluminum powder is 10:100, and the liquid modifier used is polyvinyl alcohol.

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Abstract

The invention provides a surface modification method for spherical superfine aluminum powder and modification equipment for the surface modification method. The modification equipment comprises an aluminum powder tank; the aluminum powder tank communicates with a mixing tower by an aluminum powder pipeline; a modifying agent storage tank communicates with the mixing tower by a modifying agent pipeline; the end, located inside the mixing tower, of the aluminum powder pipeline, is provided with an aluminum powder spray gun; the end, located in the mixing tower, of the modifying agent pipeline is provided with a modifying agent spray gun; the aluminum powder spray gun and the modifying agent spray gun are relatively arranged at two sides of the mixing tower; each of the aluminum powder pipeline and the modifying agent pipeline is connected with an inert gas connecting pipe; and each inert gas connecting pipe is connected with an inert gas source. A modifying agent and superfine aluminum powder are sprayed in a convection way under the protection of inert gases, the misty modifying agent and the misty superfine aluminum powder mutually impact and sufficiently contact, and superfine aluminum powder particles are wrapped by the modifying agent to form composite particles with core / shell structures, so that the aluminum powder particles are isolated from the air, the original performance of the aluminum powder is guaranteed, and risks are avoided.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of metal powder production and manufacturing, and in particular relates to a method for modifying the surface of spherical ultrafine aluminum powder and modification equipment thereof. [0003] Background technique: [0004] At present, the particle size of the ultrafine aluminum powder A1 powder used in industry is usually 5-50 μm, and the A1 powder has a large specific surface area, so that the ultrafine aluminum powder is very easy to mix with acid, alkali, water, oxygen, etc. in the air. The reaction occurs, thereby destroying the purity of the aluminum powder and affecting the original performance of the aluminum powder. Moreover, the superfine aluminum powder will also generate hydrogen gas during the reaction process with the acid, alkali, water, oxygen, etc. in the air, which is easy to cause an explosion. . Therefore, after the production of ultra-fine aluminum powder A1 powder is completed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB22F1/102
Inventor 王洪振王洋黄松涛左中强马社俊李相波张继光苏湘娜邵予坤宋鹏田路
Owner HENAN YUANYANG POWDER TECH CO LTD
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