Synergistic Preparation of Ceramic Granules from Oil-containing Waste White Clay and FCC Waste Catalyst and Their Adsorption of Sulfur-containing Waste Lye Solution
摘要
This paper focused on the resourceization of oil-containing waste white clay and fluid catalytic cracking (FCC) waste catalyst in the petrochemical industry. Through thermal desorption technology, the oil-containing waste white clay was pretreated to obtain purified waste white clay, and the FCC waste catalyst was pretreated by magnetic separation and recycling technology to get low magnetic agent. According to the composition of ceramic granules, the purified waste clay and low magnetic agent were mixed in a certain ratio to successfully prepare ceramic granules through the balling, preheating and calcination. The physical characteristics of ceramic granules were determined, and the results showed that when the ratio of purified waste clay to low magnetic agent was 9.5:0.5 and the sintering temperature was 1190 ℃, the bulk density, cylinder compression strength, water absorption rate, and loss on ignition of the ceramic granules were 649 kg/m3, 5.1 MPa, 14.6%, and 0.8%, respectively. The above performance was relatively excellent and the energy consumption during the preparation process was minimal, thus the obtained ceramic granules could be applied to the building materials industry. At a sintering temperature of 1140 ℃, ceramic granules exhibited high adsorption efficiency, with an adsorption rate of 34.4% after 24 h. Therefore, the as-prepared ceramic granules were expected to be used for the adsorption of pollutants in the water treatment industry.