Method for recovering valuable metal from metallurgical slag materials

Abstract

The invention relates to a method for recovering valuable metals from metallurgical slag materials. The invention adopts a technical scheme that the method comprises: mixing 100 mass parts of metallurgical slag with 0.1 to 100 mass parts of an activating agent; heating and activating the mixture at the activation temperature of 200 to 1,600 DEG C; and recovering the valuable metals by an ore dressing process or wet-process metallurgical process. The metallurgical slag materials may be more than one of copper slag, lead slag, zinc slag, titanium slag, vanadium slag, nickel slag and rare earth smelting slag; the chemical activating agent may be more than one of an alkali metal oxide, an alkaline earth metal oxide, an alkali metal hydroxide, an alkaline earth hydroxide, an alkali metal carbonate, an alkali metal silicate, an alkaline earth metal carbonate, an alkali metal bicarbonate, an alkali metal fluoride, an alkaline earth metal fluoride and ammonium fluoride. The method has the characteristics of simple process, high adaptability and high production efficiency, and can be widely used for recovering noble metals from metallurgical slag materials.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery of valuable metals. Specifically relates to a method for recovering valuable metals in metallurgical slag. Background technique [0002] A large amount of metallurgical slag is produced in the process of metal smelting, which contains a certain amount of valuable metals. For example, copper smelting slag (copper slag) not only contains a large amount of iron, but also contains a small amount of non-ferrous metals such as copper, lead, zinc, nickel, cobalt, and tin, and also contains precious metals such as gold, silver, platinum, palladium, osmium, and rhenium. Rare earth or rare metals such as yttrium, gallium, and germanium; and zinc smelting slag (zinc slag) not only contains a large amount of ferrous metal iron, but also contains some non-ferrous metals such as copper, lead, zinc, cadmium, and gold, silver, etc. Precious metals and rare metals such as gallium and indium. Anot...

AI Technical Summary

Problems solved by technology

The metal recovery rate of pyrometallurgy is not high, and the energy consumption is high

Due to the variable properties of metallurgical slag and the ultra-fine particle size of valuable metals, the efficiency of wet leaching or beneficiation is low