Manufacture method of superfine laminar zinc powder and zinc pulp

A technology of flake zinc powder and manufacturing method, which is applied in the field of metal powder material preparation, can solve problems that affect the performance of metal powder, follow-up product quality, uneven particle size distribution of powder, unstable product quality, etc., and achieve improved anti-oxidation Performance and corrosion resistance, reduced energy consumption, and shortened grinding time

Inactive Publication Date: 2010-12-08
昆明海创兴科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this process is that the ball milling time is as long as 5-10 hours, the efficiency is low, the particle size distribution of the powder is uneven, and the product quality is unstable, which affects the performance of the metal powder and the quality of subsequent products.
[0003] The publication number is CN 1456407A "wet production process of flake zinc and zinc aluminum alloy powder". Although the patent uses a stirring mill, the speed is 100-500 rpm, and the ball milling time is 5-8 hours; the publication number is CN1212211C The "Manufacturing Method of Flake Metal Powder" is the patented technology of the inventor Cai Xiaolan himself. This invention uses the same high-energy grinding to prepare flake metal powder, but it uses a dry process, and there is no report on the wet process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Add 400 grams of 100-500 mesh zinc powder raw materials, 3600 grams of steel balls with a diameter of 3 mm, 1000 grams of No. 200 solvent oil, and 12 grams of stearic acid into a ball mill, and grind under airtight conditions. The speed of the machine is 800 rpm, the grinding time is 50 minutes, and the grinding temperature is 40°C. The zinc slurry after grinding enters the disperser for dispersion. The dispersing speed is 50 rpm, and the dispersion time is 120 minutes. 4 grams of polyvinyl alcohol as an agent, and the dispersed product is subjected to solid-liquid separation to obtain a zinc paste containing 12% of the solvent. The zinc paste is dried at a controlled drying temperature of 120° C. and a drying time of 5 hours to obtain ultrafine flaky zinc powder. The average particle size of the fine flake zinc powder is 10-20 microns, and the bulk specific gravity is ≤1.0 g / ml.

Embodiment 2

[0014] Embodiment 2: 300 grams of zinc powder raw materials with a particle size of -400 mesh, 3200 grams of steel balls with a diameter of 5 mm, 900 grams of No. 200 solvent oil, and 12 grams of zinc stearate are added in the ball mill and ground under airtight conditions. The speed of the grinder is 1200 rpm, the grinding time is 40 minutes, and the grinding temperature is 45°C. After grinding, the scaly metal zinc powder enters the disperser for dispersion. The dispersing speed is 30 rpm, and the dispersing time is 150 minutes. Add 4.5 grams of surface coating agent zinc oxide, the dispersed product is subjected to solid-liquid separation to obtain a zinc paste containing 15% solvent, the zinc paste is dried, the drying temperature is controlled at 100°C, and the drying time is 8 hours, and ultrafine zinc powder is obtained after drying , the average particle size of ultra-fine flaky zinc powder is 8-15 microns, and the loose specific gravity is ≤1.0 g / ml.

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Abstract

The invention aims to provide a manufacturing method of ultra-fine flake zinc powder and zinc slurry, which adopts raw materials of zinc powder with the metal zinc equal or greater than 97 percent, a solvent and a surface coating agent which are input to a ball mill in proportion for grinding, then the zinc slurry containing the solvent of 10 to 20wt% is obtained through the solid-liquid separation of the dispersed metal zinc powder, and the solvent of the zinc slurry is removed by vacuum drying so as to acquire the ultra-fine flake zinc powder with the particle size of 8 to 20-micron and loose density equal or less than 1.0g / ml. Because the surface coating agent is a mixture of organic and inorganic compounds, and is added in twice and then fully coats the metal zinc powder, the anti-oxidation and corrosion protection properties of the metal powder are improved, the grinding time is shortened, the efficiency is also improved, and the energy consumption is reduced.

Description

1. Technical field [0001] The invention relates to a method for manufacturing ultrafine flaky zinc powder and zinc paste, and belongs to the technical field of metal powder material preparation. 2. Background technology [0002] The preparation method and production process of flake zinc and alloy powder wet method known in the art generally adopt: raw materials, solvents, grinding aids are added together in a drum-type ball mill or a vertical high-energy grinder for grinding, and after ball milling, polishing, grading, Solid-liquid separation, drying and other processes. The main problems of this process are that the ball milling time is as long as 5-10 hours, the efficiency is low, the particle size distribution of the powder is uneven, and the product quality is unstable, which affects the performance of the metal powder and the quality of subsequent products. [0003] The publication number is CN 1456407A "wet production process of flake zinc and zinc aluminum alloy pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04
Inventor 蔡晓兰
Owner 昆明海创兴科技有限公司
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