Flake zinc and zinc-aluminium alloy powder wet method producing process

Abstract

A wet technology for preparing the flaky powder of zinc or Zn-Al alloy includes such steps as proprotioning non-flake powder of zinc or Zn-Al alloy, solvent, assistant and medium, ball grinding, polishing, classifying and solid-liquid separating. Its advantages are short time of ball grinding, high antioxidizing nature, high diameter / thickness rate, and high granularity uniformity.

Description

Technical field: [0001] The invention relates to a production process of pigment powder, in particular to a wet production process of flake zinc and zinc-aluminum alloy powder. Background technique: [0002] At present, the wet production process of flaky zinc powder known in the art is usually: the zinc powder raw material, solvent, stearic acid or stearate-based tableting aids are put into a ball mill with a speed of several tens of revolutions per minute (horizontal In formula), the ball milling is carried out, after the ball milling, the slurry is polished and classified, and the solid-liquid separation is obtained to obtain flake zinc powder slurry. During the ball milling, in order to prevent the product from being oxidized during the process, resulting in a decline in the quality of the finished product, the ball milling speed is low, so the ball milling time Long, as described in the US Patent No. 4,026,710, the ball milling time needs more than 10 hours. Although th...

AI Technical Summary

Problems solved by technology

[0002] At present, the wet production process of flaky zinc powder known in the art is usually: the zinc powder raw material, solvent, stearic acid or stearate-based tableting aids are put into a ball mill with a speed of several tens of revolutions per minute (horizontal In formula), the ball milling is carried out, after the ball milling, the slurry is polished and classified, and the solid-liquid separation is obtained to obtain flake zinc powder slurry. During the ball milling, in order to prevent the product from being oxidized during the process, resulting in a decline in the quality of the finished product, the ball milling speed is low, so the ball milling time Long, as described in the US patent US4026710, the ball milling time needs to be more than 10 hours. Although the product quality has been improved, the ball milling time is long and the efficiency is low. The surface of the finished product is easily oxidized and the product hiding power is low.