The smelting method of bismuth

1、 Overview of Bismuth

Bismuth is a white or silver white metal with an atomic number of 83, belonging to the sixth period and group VIII elements. In nature, bismuth is mainly sulfided

The form of mineral exists. Bismuth has good ductility, conductivity, and corrosion resistance, making it widely used in the industrial field.

2、 The smelting method of bismuth

1. Pyrometallurgical smelting

Pyrometallurgical smelting is the process of crushing, grinding, and flotation of bismuth containing ores to obtain bismuth containing concentrates. Then the bismuth containing concentrate is smelted at high temperature to obtain

To coarse bismuth. In the pyrometallurgical process, commonly used fluxes include limestone, quartz, etc., to lower the melting point of slag and reduce harmful gas emissions.

2. Wet smelting

Wet smelting mainly extracts bismuth from bismuth containing ores through chemical reactions. The commonly used methods include sulfuric acid method, nitric acid method, etc. The sulfuric acid method involves mixing bismuth containing ore with sulfuric acid

Combine to generate bismuth sulfate solution, and then extract bismuth through a series of chemical reactions. The nitric acid method involves mixing bismuth containing ore with nitric acid to produce a bismuth nitrate solution, which is then reduced

The agent reduces bismuth.

3. Electrolytic smelting

Electrolytic smelting is the process of separating metallic bismuth from a bismuth containing solution through electrolysis. During the electrolysis process, bismuth ions in the bismuth containing solution obtain electrons at the cathode, generating

Become metallic bismuth. The electrolysis method has the advantages of high production efficiency and low energy consumption.