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Method for manufacturing superfine flaky zinc powder with high corrosion resistance

A technology of high corrosion resistance, flake zinc powder, applied in the fields of metallurgical waste utilization and metal powder material manufacturing, can solve the problem of high production cost, and achieve the effect of improving corrosion resistance time, improving coating quality and uniform particle size distribution

Active Publication Date: 2014-04-16
昆明海创兴科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because flaky zinc powder is mainly used in general zinc-based anticorrosion coatings, its corrosion resistance is an important quality index, but the corrosion resistance of the obtained flaky zinc powder of the above-mentioned prior art needs to be further improved; The use of high-priced common industrial zinc powder as raw material results in higher production costs

Method used

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  • Method for manufacturing superfine flaky zinc powder with high corrosion resistance
  • Method for manufacturing superfine flaky zinc powder with high corrosion resistance
  • Method for manufacturing superfine flaky zinc powder with high corrosion resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1: Put 2 kilograms of zinc powder raw materials with an average particle size of 22.5 microns, 20 kilograms of steel balls with a diameter of 5 millimeters, and 40 grams of 16 alkanoic acid into the grinding machine, first vacuumize the grinding chamber and then feed nitrogen twice Then start grinding, the linear speed of the grinder blade is 12 m / s, and the grinding time is 150 minutes. The flake zinc powder after grinding enters the mixer for mixing and passivation treatment for 2 hours, and then classifies to obtain ultra-fine flake zinc powder. Zinc powder, the median diameter D of ultrafine flaky zinc powder 50 They are 5.5, 10.4 and 17.3 microns, and the bulk densities are 1.25, 1.18 and 1.13 g / ml, respectively.

Embodiment 2

[0022] Example 2: Add 10 kg of zinc powder raw material with an average particle size of 78.90 microns, 200 kg of steel balls with a diameter of 7 mm, 200 grams of silane coupling agent and 100 grams of 12 alkanol into the grinding machine, and first pump the grinding chamber Start grinding after the vacuum feeds nitrogen for 2 times again. The linear speed of the grinder blade is 15 m / s, and the grinding time is 100 minutes. The flake zinc powder after grinding enters the mixer for mixing and passivation treatment for 3 hours. Perform cyclone classification to obtain ultrafine flaky zinc powder, and the median diameter of the ultrafine flaky zinc powder is D 50 They are 9.5, 14.5 and 19.5 microns, respectively, and the bulk densities are 1.28, 1.22 and 1.15 g / ml, respectively.

Embodiment 3

[0023] Example 3: Add 5 kg of zinc powder raw material with an average particle size of 48.60 microns, 75 kg of steel balls with a diameter of 6 mm, and 50 g of ethyl stearate into the grinding machine, and then vacuumize the grinding chamber twice and pass through Start grinding after entering nitrogen gas, the linear speed of the grinding machine blade is 8 m / s, and the grinding time is 200 minutes. The flake zinc powder after grinding enters the mixer for mixing and passivation treatment for 1 hour, and then cyclone classification treatment to obtain Ultrafine flaky zinc powder, median diameter D of ultrafine flaky zinc powder 50 They are 7.5, 12.5 and 17.50 microns, and the bulk densities are 1.24, 1.05 and 1.1 g / ml, respectively.

[0024] In the above examples, the zinc powder raw materials are commercially available, specifically purchased from Huludao Yongxing Energy Storage Materials Co., Ltd., which is the company’s battery zinc powder sieved waste, which is a by-prod...

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Abstract

The invention provides a method for manufacturing superfine flaky zinc powder with high corrosion resistance, and belongs to the technology of metallurgical waste utilization and metal powder material manufacturing. Raw zinc powder is commercially available waste sieved out in a battery zinc powder process, the raw zinc powder, industrial auxiliary agents and grinding media are placed into a horizontal type blade high-powered stirring grinder to be ground, the mass ratio of the grinding media to the raw zinc powder is 10:1-20:1, the mass of the industrial auxiliary agents is 1.0-3.0% of the mass of the raw zinc powder, the industrial auxiliary agents are one or two of hexadecanoic acid, dodecyl alcohol, ethyl stearate and silane coupling agents, the grinding media are bearing steel balls with the diameters being 5-7 millimeters, vacuum pumping is conducted firstly, and then inert gas is fed two times for protection; the ground flaky zinc powder is placed in a mixer, and mixing and passivation are conducted in air; the mixed flaky zinc powder is placed in a cyclone classifier and classified so as to obtain the superfine flaky zinc powder. The metallurgical waste can be used; the superfine flaky zinc powder has the high corrosion resistance, and production cost is reduced.

Description

[0001] technical field [0002] The invention belongs to metallurgical waste utilization and metal powder material manufacturing technology. Background technique [0003] At present, the preparation method and production process of flake zinc powder are generally as follows: raw materials, solvents, and grinding aids are added together into a roller ball mill or a vertical high-energy mill for wet grinding, and after ball milling, dispersion, solid-liquid separation, drying, Grading and other processes. The main problems are long process and ball milling time, low efficiency, uneven particle size distribution of powder, unstable product quality, which affects the performance of metal powder and the quality of subsequent products. [0004] The first inventor is the same as this patent application for the patented technology of "a method for manufacturing flake metal powder", the patent number is 03135633.8. Mix metal powder and grinding media in proportion, add grinding aid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00
Inventor 蔡晓兰
Owner 昆明海创兴科技有限公司
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