Preparation method of rare earth modified coal ash

• Main Authors: WANG CHENLIANG, TANG YUHE, HU ZHEN, QIU XIANYANG, LI HANWEN, WU LUQING, LI PEILUN, SONG BAOXU, WANG CHENGHANG, HU FOMING, FU HUA, WANG TAI, ZOU JIANJIAN
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

A preparation method of rare earth modified coal ash specifically includes the following steps of adding distilled water to the raw material coal ash to be heated, washed and dried by ultrasonic waves and then screened to obtain under-screen coal ash, evenly mixing the coal ash with a cerium chloride water solution and a lanthanum chloride water solution according to the solid-liquid ratio, conducting sintering and natural cooling after heating, stirring, soaking, filtering and drying, mixing and stirring the rare earth preprocessed coal ash and sulfuric acid according to the solid-liquid ratio, conducting filtering and drying, mixing the mixture with scrap iron in proportion, rinsing the obtained mixture through deionized water, and drying the mixture to obtain the rare earth modified coal ash. Ferro-manganese-containing waste water is processed through an experiment facility containing the modified coal ash, the removal effect is remarkable, the method has the advantages of being easy to operate, capable of