High-purity barite powder as well as preparation method and application thereof

• Main Authors: LIN MIN, LIU WEIQIANG, QIU WENFU, DENG KEWEN, WU WEIBING
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2024
• Subjects: ADHESIVES; BLASTING; BRAKES; CHEMISTRY; CLUTCHES; COMPOSITIONS BASED THEREON; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; COUPLINGS FOR TRANSMITTING ROTATION; DYES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INORGANIC CHEMISTRY; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS

The invention belongs to the technical field of powder preparation, and provides high-purity barite powder and a preparation method and application thereof.The method comprises the following steps that barite concentrate is subjected to ball milling to obtain a barite product, then the barite product and hydrochloric acid are mixed to obtain precipitates, compounds such as aluminum, iron and calcium in barite can be transferred into a solution, the remaining precipitates are BaSO4 and SiO2, and the BaSO4 and SiO2 are added into the solution; mixing the precipitate with hydrofluoric acid, reacting with SiO2 to generate SiF4 gas, and drying and packaging to obtain the high-purity barite powder, the process is simple, and the cost is low. According to the high-purity barite powder prepared in the invention, the content of barium sulfate can reach 99.1% or above, and particularly, the reduction of the content of SiO2 is greatly helpful for the noise reduction and other properties of friction material products. 本发