Screening-ball-milling method sheet metal powder and preparation method thereof

A flake metal, ball milling technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of accelerated anode sacrificing on zinc surface, inability to form distribution and arrangement, affecting salt spray performance, etc., to reduce trouble, manpower, and finished products. High rate and good production efficiency

Active Publication Date: 2017-06-27
SHENZHEN NONFEMET TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, figure 2 The anti-corrosion performance of the case is relatively figure 1 poor condition shown, figure 2 In the process of stacking zinc powders with different sheet thicknesses, due to the different sheet thicknesses, a bridging effect will occur and gaps will be formed, making it impossible to form a dense distribution arrangement. Therefore, the gaps can promote the filling of external salts and accelerate the anode sacrifice of the zinc surface. , which greatly affects its salt spray performance

Method used

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  • Screening-ball-milling method sheet metal powder and preparation method thereof
  • Screening-ball-milling method sheet metal powder and preparation method thereof
  • Screening-ball-milling method sheet metal powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A flaky zinc powder by sieving-ball milling method, the sheet thickness of the target flaky zinc powder is about 3.3 μm, which is prepared by the following steps:

[0047] Step S1: Sieve the 200-1000-mesh raw zinc powder into zinc powders of different meshes per 50 meshes; the sieving equipment used is a rotary vibrating sieve air classifier or a mechanical vibrating sieve;

[0048] Step S2: Select steel balls with a diameter of 5 mm; put the above-mentioned sieved zinc powder and steel balls into a 100L high-energy ball mill at a mass ratio of 10:1, and metal powder surface coating additives at 1% of the powder mass (the model is Zoz-GmbH), vacuumize, fill with nitrogen, and carry out ball milling in batches; The metal powder surface treatment auxiliary agent is a ternary composite auxiliary agent, and the consumption of the metal powder surface treatment auxiliary agent is the metal powder quality. 1%. Add ternary compound additives to coat the surface of zinc powder...

Embodiment 2

[0066] A flaky zinc powder by sieving-ball milling method, the sheet thickness of the target flaky zinc powder is about 3.0 μm, which is prepared by the following steps:

[0067] (1) Sieve the 200~1000 mesh raw zinc powder into several parts with a mechanical vibrating screen for every 50 mesh;

[0068] (2) Prepare the ternary compound additive that needs to be added to coat the surface of the zinc powder and improve the oxidation resistance of the zinc powder; the amount of the ternary compound additive is 3% of the mass of the metal powder.

[0069] (3) Select a steel ball with a diameter of 5mm;

[0070] (4) Ball milling. Put the above-mentioned sieved zinc powder and steel balls into a 100L high-energy ball mill (model Zoz-GmbH) at a mass ratio of 10:1, and metal powder surface coating additives according to 3% of the powder mass, and vacuumize. Fill with nitrogen, and carry out ball milling according to the batch screened in front;

[0071] (5) The speed of the ball mi...

Embodiment 3

[0081] A flaky zinc powder by sieving-ball milling method, the sheet thickness of the target flaky zinc powder is about 2.8 μm, which is prepared by the following steps:

[0082] 1. Sieve the 200~1000 mesh raw material zinc powder into several parts with a mechanical vibrating screen every 50 mesh;

[0083] 2. Prepare the ternary compound additive that needs to be added to coat the surface of the zinc powder and improve the oxidation resistance of the zinc powder; the amount of the ternary compound additive is 5% of the mass of the metal powder.

[0084] 3. Select a steel ball with a diameter of 5mm;

[0085] 4. Ball milling. Put the above-mentioned sieved zinc powder and steel balls into a 100L high-energy ball mill (model Zoz-GmbH) at a mass ratio of 10:1, and the metal powder surface coating auxiliary agent according to 5% of the powder mass, and vacuumize. Fill with nitrogen, and perform ball milling in batches;

[0086] 5. The speed of the ball mill is 500 rpm, and the...

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Abstract

The invention provides screening-ball-milling method sheet metal powder and a preparation method thereof. The preparation method of the screening-ball-milling method sheet metal powder comprises the following steps that every 25-50 meshes of raw material metal powder are screened into metal powder of different meshes; the metal powder, ball milling steel balls and metal powder surface treatment auxiliaries are put into ball milling equipment according to different meshes, vacuumizing and nitrogen filling are conducted, ball milling is conducted according to different meshes time by time, and ball milling time is adjusted according to the particle size of the screened metal powder; and all grades of ball-milled powder is collected and is graded again in an airflow classification mode. With the adoption of the technical scheme of the screening-ball-milling method sheet metal powder and the preparation method thereof, the thickness of the obtained sheet metal powder is uniform, the yield of over-milled metal powder can be reduced substantially, meanwhile, the quantity of milled coarse metal particles is small, the coarse metal particles can be milled again into qualified products, the finished product rate is high and can reach 100%, and production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a sieving-ball milling flake metal powder and a preparation method thereof. Background technique [0002] At present, metal powder such as zinc powder is generally added to metal surface anticorrosion and marine heavy anticorrosion materials for anticorrosion. Commonly used metal powder preparation methods generally use raw material metal powder such as spherical zinc powder, all particle groups with a particle size between 200 mesh and 1000 mesh, add a certain amount of additives, and use high-energy ball milling, barrel ball milling, etc. According to the set rotation speed or combination of rotation speeds, ball milling is carried out to obtain flaky zinc powder with a certain thickness and diameter. The flaky powder produced by ball milling in this way, some powders are over-ground, while some powders are not ground to the ideal thickness of flaky zinc po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00
CPCB22F9/04B22F2009/043B22F1/068B22F1/102
Inventor 陈端云
Owner SHENZHEN NONFEMET TECH
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