Process method for preparing compact CA2-CA6 complex-phase refractory clinker by one-step method

• Main Authors: YIN XUEDONG, ZHANG BO, YIN XUELIANG, WANG QUANZHOU, DING HONGHAI, HAN TINGQUAN
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to a process method for preparing a compact CA2-CA6 complex-phase fire-resistant clinker by a one-step method. The compact CA2-CA6 complex-phase fire-resistant clinker comprises, by weight, 38.69-86.36% of Al2O3, 10.64-20.31% of CaO and 1-3% of mixed micro powder of La2O3 and TiO2 in a weight ratio of 1: 1. The relative density is 90.7-93.6%, and the apparent porosity is 3.3-4.8%. The preparation method comprises the following steps: (1) respectively grinding bauxite, limestone and the mixed micro powder of La2O3 and TiO2 in a weight ratio of 1: 1, and mixing; and (2) pressing the mixed material into green pellets, and then calcining to prepare the clinker. The mixed micro powder of La2O3 and TiO2 in a weight ratio of 1: 1 is used as a sintering promoter, and the mixed micro powder of La2O3 and TiO2 in a weight ratio of 1: 1 is dissolved in a CA2-CA6 phase to form a solid solution in the calcining process, so that the sintering activity of the CA2-CA6 phase is improved, and the compact C