A treatment process for waste metal powder produced by a 3D metal printer

Abstract

The invention relates to a treatment process for waste metal powder produced by a 3D metal printer. The specific steps are as follows: (1) filtering the waste water and metal powder produced by the 3D metal printer; (2) filtering the metal powder and bentonite according to the ratio of 1: The weight ratio of 50 is mixed evenly; (3) lye is added to the mixture prepared in step (2), and the reaction is complete; (4) the reactants are dried and sintered at 1150 degrees in an atmosphere furnace filled with argon. The beneficial effects of the present invention are: the present invention utilizes the physical adsorption and chemical stability of bentonite, and the mixing with metal powder will not produce inflammable and explosive situations, and the operation process is extremely safe. Use the chemical principle of acid-base neutralization to destroy the original chemical structure of metal alloys, stabilize the originally unstable chemical bonds, and use high-temperature drying and crystallization to completely make the active metal powder inert, which is no longer harmful to people's lives. influences.

Description

technical field [0001] The invention relates to a metal waste treatment process, in particular to a treatment process for waste metal powder produced by a 3D metal printer. Background technique [0002] With the rapid development of science and technology in today's society, high-tech alloy materials account for an increasing proportion of science and technology. Titanium alloys and cobalt-chromium alloys are more and more used in the aerospace medical industry. It is especially widely used in 3D metal laser printing, which represents the highest technological productivity today, and a certain amount of metal powder waste will be generated while being used. If these alloy waste powders are not handled properly, they will cause harm to the human body and the environment (metal powder and filter dust are identified as high-risk, containing heavy metal elements, and long-term contact will cause permanent damage to the skin and even cause allergic reactions.) Domestic environmen...

AI Technical Summary

Problems solved by technology

[0003] 3D printing technology is still an innovative productivity in China. There is no mature and systematic technical solution for waste powder treatment in China. Some waste powder enters the wastewater treatment plant for precipitation treatment, and the other part becomes waste powder after filtration and enters the general garbage recycling site.

[0004] Disadvantages of the existing technology: the metal powder used in 3D printing has the characteristics of spontaneous combustion and explosion at room temperature, and is prone to danger and secondary pollution during transportation and storage

Metal powders are not properly handled after extraction