Study on the preparation of the P-type zeolite micropowder from coal gangue
Base d on the low utilization rate of coal gangue and the characteristic that coal gangue is rich in silicon and aluminum,the idea of preparing zeolite mineral fine powder from coal gangue waste was put forward.Taking coal gangue in Qitaihe city as raw material,P-type zeolite micropowder was synthesized by alkali fusion-hydrothermal method.The effects of aging temperature,liquid-solid ratio and alkali-solid ratio on the morphology of P-type zeolite were investigated.The optimum process conditions were obtained as follows:the Si/Al ratio was 1∶1,the aging temperature was 50℃,the liquid-solid ratio was 7∶1,and the alkali-solid ratio was 0.8∶1.The SEM test results indicate that the micromorphology of the synthesized product was a spherical zeolite with a particle size of about 6µm.The XRD test shows that the characteristic peaks of the product are consistent with the standard characteristic peaks of NaP-type zeolite.
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