Method for judging high-temperature carbonization smelting end point of Ti-containing blast furnace slag

• Main Authors: WANG DONGSHENG, ZHAO QING'E, HUANG JIAXU, WANG TANGLIN
• Format: Patent
• Language: Chinese; English
• Published: 11.09.2020
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PHYSICS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TESTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for judging a high-temperature carbonization smelting end point of Ti-containing blast furnace slag, which comprises the following steps of A) putting thermal-state Ti-containing blast furnace slag into a carbonization electric furnace, and monitoring the content change of gas in a flue behind a secondary combustion chamber by using a gas analyzer while heating, andB) adding a carbonaceous reducing agent when a complete molten pool is formed in the carbonization electric furnace, smelting until the content of COx in the flue gas is monitored to be lowest and constant, and ending the smelting. According to the method, the gas analyzer is used for monitoring the change of the content of COx in the flue gas, then the reduction reaction process in the furnace is reflected through the change trend of the content of COx in flue gas components, and finally judgment of the high-temperature carbonization smelting end point of the Ti-containing blast furnace slagis guided; the judgment m