Old converters unlimited can be sold to a number of companies associated with refineries with contracts for the recycling of their enriched raw materials. The scope of activity of such companies includes the purchase of spent converters unlimited from private and legal entities.
Before concluding a contract of sale, the company analyzes the converters unlimited which valuable element it contains, and in what quantity.
Based on the analysis
the transaction value is determined. On average, for foreign cars prices are per 1 kg of converters unlimited vary from 50 to 150 USD, depending on the car brand.
converters unlimited from Hummer, Land Rover, Infiniti, Jeep GrandCherokee, Lexus, Mercedes-Benz reach the highest costs.
The task of recycling automotive parts waste is to obtain semi-finished products suitable for recycling. The hydrometallurgical method for extraction of precious metals for converters unlimited consists of
the following main steps:
- Primary leaching of waste with mixtures of acids, the composition of which depends on qualitative and quantitative content of precious metals in source, at temperatures above 100 ° C;
- Repeated washing of an acid-insoluble carrier with water;
- Drying semi-finished product at 200 ° C and calcining at temperatures of the order of 600 ° C.
When using the pyrometallurgical method for converters unlimited, waste processing occurs in the following several stages:
- Crushing and sorting its particles by size.
- Preparation of the initial charge.
- Melting of crushed product at a temperature of 3000 ° C in a plasma-arc furnace with the formation of melts of precious metals, ceramics, and metal carriers.
- Periodic discharge of slag melts, stratifie due to the difference in densities of metals and ceramics: the ceramic melt remains at a top, precious metal melt in collector (copper, iron) is draine from the furnace.
- Granulation of a liquid melt.
- The heal granulation product, enriched with precious metals by 3-15%, is a suitable raw material for refining plants, which further produce precious metals with the highest degree of purity.