Copper oxide is a black oxide of copper that is slightl […]
Copper oxide is a black oxide of copper that is slightly bisexual and slightly hygroscopic. The relative molecular mass is 79.545, the density is 6.3-6.9 g/cm3, and the melting point is 1026 °C. Do not dissolve in water and ethanol, soluble in acid and ammonia solution, slowly dissolve, can react with strong base. Copper oxide is mainly used for making rayon, ceramics, glaze and enamel, batteries, petroleum desulfurizers, insecticides, hydrogen, catalysts, green glass, etc.
The main purpose:
Chemical: as an oxidant; carbon is determined in gas analysis; as a reaction catalyst, rayon and other copper compounds are produced.
Used as a coloring agent for glass, enamel, ceramic industry, anti-wrinkle agent for paint, polishing agent for optical glass.
Desulfurizer for rayon manufacturing industry and grease.
Used as a raw material for the manufacture of copper salt, it is also a raw material for making artificial gemstones.
Used as a raw material for nickel-zinc ferrite and heat-sensitive components in the production of magnetic materials.
Manufacturing pyrotechnics, catalysts, and electroplating industries.
Copper powder oxidation
The copper ash and copper slag are used as raw materials for calcination, and preliminary oxidation is performed by heating with gas to remove moisture and impurities in the raw materials. The resulting primary oxide is naturally cooled, and after pulverization, it is subjected to secondary oxidation to obtain crude copper oxide. The crude copper oxide is added to a reactor pre-packed with 1:1 sulfuric acid, and reacted under heating and stirring until the relative density of the liquid is 1 times. When the pH is 2 to 3, the reaction end point is formed, and a copper sulfate solution is formed and allowed to stand. After clarification, iron shavings were added under heating and stirring to displace copper, and then washed with hot water to no sulfate and iron. The mixture was centrifuged, dried, oxidized and calcined at 450 ° C for 8 h, pulverized to 100 mesh, and oxidized in an oxidizing furnace to obtain a copper oxide powder.