Ferroalloy smelting: refining. Low-grade iron alloy smelting crucible was started around 1860. Later, with the development of blast furnace smelting ferromanganese and silicon below 12% ferrosilicon. 1890 - 1910 in France began with the production of electric arc furnace ferroalloys. Moisan has used an electric arc furnace for difficult elements to restore the system test, Carvoeiro used in industrial production, when both coke and charcoal as reductant related ore 55 ferrosilicon, products are mostly high-carbon. Ferroalloy Development: Resources. Ferroalloy smelting ore raw materials used in the country except the silica widespread, mostly concentrated in a few areas 50 ferrosilicon, such as chrome ore 90% Fu presence in southern Africa, a large number of stored manganese in South Africa and the Soviet Union. Most minerals exist as oxides or oxygen-containing salts (such as chromium, manganese, tungsten, nickel, vanadium, titanium, etc.), some of sulfides (e.g. molybdenum). 50 ferrosilicon, Hua Tuo metallurgy (certified), ferrosilicon provided by Hua Tuo Anyang metallurgical limited liability company. Anyang Hua Tuo metallurgical limited liability company (www.htyjnc.com) is Anyang, ferroalloy and products of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hua Tuo in metallurgy leadership with the staff warmly welcome all inquiries negotiations to create Hua Tuo metallurgical a better future.