Production method for high-basicity hollow particle heat-insulating hot metal covering flux

• Main Authors: SUN XUN, WANG LI, SHEN MINGGANG, SHANG DEHONG, LI TAO
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2008
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention relates to a production method for high alkalinity hollow particle molten steel heat-preserving covering agent, the method comprising the steps of: using a Raymond machine to crush lime powder to the powder lower than 200 meshes, and placing the crushed lime thin powder into a temperature-controllable high speed stirrer, adding passivator of 1-2%, controlling the temperature between 80 and 100 DEG C, stirring in high speed for 5 to 10 minutes; then mixing the passivated lime powder with wollastonite in powder, bonding agent according to the smelting-required alkalinity to form slurry, spraying and granulating to produce the high alkalinity hollow particle molten steel heat-preserving covering agent; the technology of the invention can be applied to the production flow of steel-making continuous casting procedure, and efficiently adsorb the impurities in the molten steel at the same time of guaranteeing the heat preservation effect, improving the end product quality of steel.