Flaky zinc powder preparation method

A scaly zinc powder and zinc powder technology, applied in the field of metallurgy, can solve problems such as low efficiency and long process flow, and achieve the effects of good dispersion performance, high flaky degree and shortened production cycle

Active Publication Date: 2015-08-05
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ball milling is currently the most commonly used method for preparing flaky zinc powder. It has the advantages of simple equipment and good grinding effect. It usually consists of five production processes such as material selection, stirring ball milling, cyclone classification and two

Method used

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  • Flaky zinc powder preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] The preparation method of the flaky zinc powder of the present invention includes the steps of batching, ball milling, drying, and sieving, and specifically includes:

[0013] A. Ingredients: Use atomized spherical zinc powder with a particle size of less than 325 mesh as raw material, add steel balls with a zinc powder weight ratio of 10-20:1, and add a grinding aid and a surface modifier with a zinc powder weight percentage of 1 to 3 to obtain Material a;

[0014] B. Ball milling: Place material a in a ball mill, add material a with a solid-liquid mass ratio of 1:5-6 times the volume concentration of 99% ethanol solution for ball milling to obtain material b;

[0015] C. Drying: Dry material b to constant weight;

[0016] D. Screening: The dried material b is classified by cyclone classification system to obtain the target.

[0017] The diameters of the steel balls mentioned in step A are φ20mm and φ12mm respectively, and the number ratio is 1:3.

[0018] The grinding aid in st...

Example Embodiment

[0023] Example 1

[0024] 1. Put 200g -325 mesh (ie less than 325 mesh) atomized spherical zinc powder, 3000g steel ball, 3g stearic acid, 3g polyvinyl alcohol, and 1000g volume concentration of 99% ethanol into the ball mill tank;

[0025] 2. The rotating speed of the ball mill is 1500 rpm, and the ball milling time is 6 hours;

[0026] 3. Put the ball-milled zinc powder in a vacuum drying oven and dry it at 70~80℃;

[0027] 4. The dried zinc powder was classified by a cyclone classification system, and the average particle size of phosphorous flake zinc powder was D(50)=22.4μm, the degree of flake formation was 93%, and the diameter-to-thickness ratio was 47.

Example Embodiment

[0028] Example 2

[0029] 1. Put 200g -325 mesh atomized spherical zinc powder, 4000g steel ball, 3g stearic acid, 3g sodium dodecylbenzene sulfonate, and 1000g volume concentration of 99% ethanol into the ball mill;

[0030] 2. The rotating speed of the ball mill is 1500 rpm, and the ball milling time is 6 hours;

[0031] 3. Put the ball-milled zinc powder in a vacuum drying oven and dry it at 70~80℃;

[0032] 4. The dried zinc powder was classified by a cyclone classification system, and the average particle size of phosphorous flake zinc powder was D(50)=16.8μm, the degree of flake formation was 95%, and the diameter-to-thickness ratio was 52.

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Abstract

The invention discloses a flaky zinc powder preparation method. The method includes the steps of material distribution, ball milling, drying and screening, and specifically includes the steps of using atomized spherical zinc powder with the granularity smaller than 325 meshes as raw materials, adding steel balls with the zinc powder weight ratio of 10:1 to 20:1, adding grinding agents with the zinc powder weight percentage of 1 to 3 and surface modification agents to obtain a material a, placing the material a in a ball mill, adding an ethanol solution with the material a solid-liquid mass ratio of 1:5 to 1:6 and the size concentration of 99% to obtain a material b, conducting drying till the weight is constant, and conducting grading through a cyclone grading system to obtain a target object. Zinc powder ball milling and surface processing are achieved through one step, surface modification is conducted on the zinc powder while ball milling is conducted on the zinc powder, the production cycle of the flaky zinc powder is shortened, the flaking degree of the prepared flaky zinc powder is high, and the dispersion performance is good.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a preparation method of scaly zinc powder. Background technique [0002] Phosphorus flake zinc powder is an important anticorrosive flake pigment. It is mainly used to prepare various water-soluble inorganic salt coatings, organic zinc-rich coatings, etc., and is widely used in automobiles, home appliances, ships, and traffic light industries. The ball milling method is currently the most commonly used method for preparing scaly zinc powder. It has the advantages of simple equipment and good grinding effect. It usually consists of five production processes including material selection, stirring ball milling, cyclone classification and two surface modification. The dry ball milling method has a simple process but low efficiency. The wet ball milling method has the advantages of simple equipment, good grinding effect, and high product qualification rate, but it has disadva...

Claims

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Application Information

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IPC IPC(8): B22F9/04
Inventor 周林尚青亮刘捷张玮孙彦华马泉涌
Owner KUNMING METALLURGY INST
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