| 摘要 |
A phosphatic mineral binder is prepared by dissolving a phosphate of aluminium, iron or nickel in sulphuric, nitric or hydrochloric acid and dehydrating the solution, either at about 150 DEG C. to form a clear solid, or at 125-130 DEG C. to form a clear viscous tacky liquid. Alternatively, the solution may be formed by dissolving a sulphate, nitrate or chloride of the metal in phosphoric acid. In an example aluminium chloride, prepared from bauxite and hydrochloric acid, is treated with phosphoric acid. The products may be used to bond bauxite, fuller's earth, activated carbon, silica gel, magnesium oxide, magnesium silicate, asbestos or feldspar. They may also be used to modify clays and to form glass or porcelain type material with lime and silica.ALSO:A phosphatic mineral binder is prepared by dissolving a phosphate of aluminium, iron or nickel in sulphuric, nitric or hydrochloric acid and dehydrating the solution, either at about 150 DEG C. to form a clear solid, or at 125 DEG -130 DEG C. to form a clear viscous tacky liquid. Alternatively the solution may be formed by dissolving a sulphate, nitrate or chloride of the metal in phosphoric acid. In an example, aluminium chloride, prepared from bauxite and hydrochloric acid, is treated with phosphoric acid. The products may be used to bond bauxite, fuller's earth, activated carbon, silica gel, magnesium oxide, magnesium silicate, asbestos or feldspar. They may also be used to modify clays and to form glass or porcelain type material with lime and silica. |
