Technology for treating abandoned metal powder produced by 3D metal printing machine

Abstract

The invention relates to a technology for treating abandoned metal powder produced by a 3D metal printing machine. The technology specifically includes the following steps that firstly, abandoned water and metal powder produced by the 3D metal printing machine are filtered; secondly, the metal powder obtained through filtration and bentonite are evenly mixed according to the weight ratio of 1:50; thirdly, alkali liquor is added in the mixture prepared in the second step, and the alkali liquor and the mixture totally react with each other; fourthly, reactants are dried and sintered at the temperature of 1150 DEG C in an atmosphere oven filled with argon. The technology has the advantages that by means of the physical adsorption performance and the chemical stability of the bentonite, the flammable and explosive condition cannot occur when the bentonite and the metal powder are mixed, and the operating process is very safe. On the basis of the chemical principle of acid-base neutralization, the original chemical structure of metal alloy is destroyed, chemical keys which are not stable originally tend to be stable, active metal powder thoroughly becomes inert metal powder through high-temperature drying crystallization, and adverse effects on people's life are avoided.

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