Production method for smelting ferrochromium with waste crystalline silicon cutting powder as reducing agent

• Main Authors: TANG XIANQING, TANG HUAYING, ZHENG HUILI, ZHENG ZAICHUN, LI KE, WU XIAO
• Format: Patent
• Language: Chinese; English
• Published: 13.04.2016
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a production method for smelting ferrochromium with waste crystalline silicon cutting powder as a reducing agent. The production method includes the steps that the waste cutting powder in the crystalline silicon sectioning industry replaces all or part of coke to serve as the reducing agent, and is mixed into chromium ore raw materials, the mixture is directly put into a furnace to be smelted, the high energy storage characteristic and the high reduction characteristic of high-purity monatomic silicon and the high energy storage characteristic and the high reduction characteristic of silicon carbide in the waste crystalline silicon cutting powder are fully used, chromium oxide and iron oxide in the chromium ore are subjected to a reduction and exothermic reaction in the high-temperature melting state, and qualified ferrochromium products can be prepared. As the high-purity monatomic silicon resource and the silicon carbide resource in the waste crystalline silicon cutting powder can be