Method for recycling crystal glass rare earth polishing powder for ornaments

Abstract

The invention discloses a method for recycling crystal glass rare earth polishing powder for ornaments. The method comprises the following steps: roasting at high temperature, quenching, performing slurry mixing, performing separation, dissolving soluble substances with a strong acid mixture, coarsely sieving to remove impurities and large particles, performing fine grinding by a ball mill, drying, removing iron impurities by a magnetic separator, calcining, quenching, drying and grinding and sieving to prepare regenerated rare earth polishing powder. Compared with the prior art, the technical scheme of the invention can effectively change disposable rare earth polishing powder into recycling powder, saves precious rare earth resources and reduces generation of solid waste.

Description

technical field [0001] The invention belongs to the technical field of polishing powder regeneration, in particular to a method for recycling crystal glass rare earth polishing powder for ornaments. Background technique [0002] Man-made crystals are made of crystal glass and processed into various shapes of ornaments or handicrafts through mechanical cutting, grinding, polishing and other processes. For rhinestones and other products that require high fire color effects, whether they can reflect colorful and grotesque colors, the polishing effect is a very important factor. At present, in the rhinestone industry, polishing is mainly made of rare earth polishing powder through a certain process to make a polishing wheel. Finish. During the production of rhinestones, a large amount of glass powder, rare earth polishing powder wrapped in resin binder, adhesives and engine oils used when fixing the rhinestones to the fixture will be produced. The adhesives generally contain ro...

AI Technical Summary

Problems solved by technology

During the production process, since the polishing wheel is used for one time, the rare earth polishing powder will be mixed in various waste residues, which causes a huge waste of rare earth resources and also produces a large amount of solid waste

The existing rare earth polishing powder recovery methods generally do not consider that the rare earth is wrapped in the resin binder, the overall density has changed, and it has become a light component, which cannot be combined with glass powder or carbonic acid by the method of density difference. Impurities such as calcium are separated. At the same time, due to the protective effect of the resin binder, it also hinders the treatment of rare earth polishing powder with strong acid. Therefore, the resin binder must be removed first. However, if it is removed by incineration, it must also be considered to prevent The crystal glass with a lower melting point will not soften or melt, otherwise the rare earth polishing powder will be wrapped, which will affect the subsequent separation. The melting point of cerium oxide rare earth polishing powder is generally 2397 ° C, while the crystal glass used for rhinestones The melting point is generally around 1000°C, and it will soften if it exceeds 900°C, which will cause the rare earth polishing powder to be wrapped and hardened after cooling