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Dec. 30, 2024
The recycling of scraps metal is a systematic and complex process, especially for precious metal scraps. The following are the main steps and methods of Huatuo scraps metal recycling:
1. Collection and classification:
The first step in the recycling process is to collect precious metals scrap , which may come from electronic products, jewelry, industrial catalysts, etc. The scrap needs to be classified for subsequent processing.
2. Pretreatment:
The pretreatment stage is mainly to clean and crush the scraps, remove impurities, such as non-metallic impurities such as plastics and glass, and reduce the particle size to prepare for subsequent chemical treatment or pyrometallurgical/ wet recycling.
3. Chemical treatment (or pyrometallurgical/wet recycling):
Chemical treatment is the core link in the recycling process. Precious metals are dissolved from the scrap by using specific chemical reagents, such as acid treatment (hydrochloric acid, nitric acid, etc.), aqua regia, cyanide solution, etc.
● Pyrometallurgical recycling is to separate precious metals from scrap by high-temperature smelting, which is suitable for scrap with higher purity and less impurities.
● Wet recycling uses chemical reagents to dissolve precious metals, and then extracts precious metals through a series of chemical reactions and separation steps. It has advantages in treating complex waste and low-purity waste.
4. Refining:
● The extracted precious metal solution needs to be further refined to remove impurities and improve purity. Refining methods include electrolysis, distillation, precipitation, etc.
● The refining process may include multiple precipitations, filtrations, and washings to ensure that impurities are completely removed.
5. Casting and testing:
The recovered precious metal powder or block may also undergo calcination, dissolution, reprecipitation and other steps to form high-purity metal products, such as sponge palladium, sponge platinum, etc.
In summary, the core steps of scrap metal recycling include collection and classification, pretreatment, chemical treatment (or pyrometallurgical/wet recycling), refining, and subsequent casting and testing.
Huatuo insist on strict control throughout the recycling process to reduce the emission of harmful chemicals, ensure safe operation, and meet environmental standards. Huatuo is your reliable partner for sustainable development. Welcome to contact us today.
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