METHOD FOR EXTRACTION OF ALUMINUM OUT OF SECONDARY ALUMINUM-CONTAINING RAW MATERIAL IN REVERBERATORY FURNACE

摘要

This invention relates to metallurgy, in particular to methods for extracting aluminum by melting aluminum-containing waste in reflective furnaces. The purpose of the invention is to reduce fuel consumption, increase productivity and degree of metal recovery. In a two-chamber reflective furnace with face nozzles and a vertical gas-air tuyere, 18 tons of scrap and waste with an aluminum content of 86% by weight are melted. At the end nozzles, the consumption of natural gas is 300 m ³ / h, and at the lance aimed at the filling and located at a distance of 0.4 - 0.6 m from the filling, the gas consumption is 90 m ³ / h. At the end nozzles, the oxidizer excess ratio is 1.1, and at the lance, it is 0.8. Specific capacity increases from 3.3 to 3.7 t / h, fuel consumption decreases from 150.8 to 131.2 kg u./t of charge, and aluminum recovery increases from 90.05 to 91.7%. 1 hp ff, 2 tab.