Verfahren zur Herstellung von Metallischem Magnesium und Industriellem Silicium durch Zersetzung von Serpentinenförmiger Säure

Details

Veröffentlichungs-Nr.

EP4744750

Anmeldetag

18. November 2025

Veröffentlichung

20. Mai 2026

Rechtsraum

EP

Abstract

A method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid is provided. Serpentine is used as a raw material, and is processed by a two-stage countercurrent leaching process in a hydrochloric acid system. A hydrometallurgical process is adopted, including beneficiation, wet grinding, slurry storage, filtration, two-stage atmospheric pressure hydrochloric acid leaching, washing and filtration of leached silica slag, iron removal and nickel precipitation from a leachate, separation, washing and filtration of a ferric hydroxide precipitate and a nickel hydroxide precipitate, crystallization and evaporation of a magnesium chloride solution, and hydrochloric acid preparation from a flue gas generated after thermal decomposition of magnesium chloride. The present disclosure develops a process of decomposing serpentine with hydrochloric acid and producing metallic magnesium by a drying-electrolysis method, and a process of producing industrial silicon by smelting silica slag in an electric furnace.

Anmelder

Firma

Toli County Zhongda Magnesium Industry Co., Ltd

Land

🇨🇳 China