Green crystal powder, metallic luster, insoluble in water, difficult to dissolve in acid, extremely stable to light, air, high temperature, corrosive gas, magnetic, good physical properties.
Product use: used for smelting metal chromium, chromium carbide, polishing paste, paint pigments, also used in enamel, glass, ceramic colorants, organic synthesis catalysts.
Folding ammonium sulfate-red strontium sodium thermal decomposition
This method is the basic method for producing chromium oxide in the United States, Britain, Germany and other countries, and has become the production method with the largest output, the best quality and the most variety of chromium oxide produced abroad. The utility model has the advantages that the production process is simpler than the liquid phase reduction method, the cost is lower than the chromic anhydride decomposition method, and the adaptability is wide (the pigment, the abrasive, the refractory material and the metallurgical grade chromium oxide can be prepared), and is suitable for the large-scale production of the rotary kiln, the production process The towel does not substantially generate harmful gases. Therefore, it replaced the early red strontium sodium monoammonium chloride thermal decomposition method (the volatile loss of ammonium chloride). Commercial chromium oxide is almost directly or indirectly produced from sodium sulphate, and its output accounts for about 20% of the consumption of sodium sulphate. The total production capacity of chromium oxide in the world is about 100,000 tons/year.
