Study on Preparation and Acid Resistance Modification of Lithium Mica Slag Non-Sintered Ceramic Filter Material
To prepare acid resistant lithium mica slag non-sintered ceramic filter material,the raw material was activated by steam pressure process to obtain mechanical strength of the ceramic filter material,and chemical modifiers were used to improve its surface acid resistance.The results showed that with the increase of lithium mica slag content,the strength density ratio of ceramic filter material decreased gradually.When the proportion of lithium mica slag replacing river sand was 5%,the bulk density of the prepared ceramic filter material was 985 kg/m3,and the cylinder compressive strength was 5.9 MPa.After soaking in hydrochloric acid,the hydrochloric acid leaching rate of the ceramic filter material reached 12.7%,and the content of calcite in the sample decreased from 15.0%to 6.4%.The calcite content of NSJ modified ceramic filter material soaked in hydrochloric acid was 13.8%,which was equivalent to the content of the unsoaked sample.The solubility index of hydrochloric acid was reduced from 12.7%to 1.5%,and the acid resistance of the ceramic filter material was significantly improved.
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