![]() ![]() ![]() In general, the suppliers could say only that their brick would pass ASTM-C279 specifications, which deal with H2SO4 rather than HNO3.Ī general listing compiled from the literature by Samsonov and Vinitskii gives the resistance of several refractory compounds to acid and alkali attack at various times and solution concentrations. Although the suppliers recommended acid brick, carbon brick, or dense firebrick, they advised that materials be tested in an environment simulating actual conditions because of limited experience with HNO3 processing and the uniqueness of each industrial process. Industrial equipment designers, fabricators, and material suppliers of acid processing systems were surveyed for their recommendations on ceramic construction materials to be used in HNO3 and other environments. In the HNO3 extraction process studied by the Bureau, acid concentrations range up to 50 pct and temperatures to 120° C. ![]() One example is the construction material needed to line leaching vessels used in the extraction of alumina from clay using hydrochloric acid (HCl), nitric acid (HNO3), or sulfuric acid (H2SO4). New mineral processing techniques being investigated by the Bureau of Mines and others, such as processing at elevated temperatures, leaching with acids and bases, chloride leaching, and dissolution in fused salt baths, may require the use of construction materials that, have good corrosion resistance. How Ceramic Materials are Corrosion Resistance to Nitric Acid ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |