Method for recovering valuable metal compounds and removing silicon from SCR (Selective Catalytic Reduction) denitration catalyst

The invention relates to the field of waste flue gas denitration catalyst recovery, in particular to a method for recovering valuable metal compounds and removing silicon from an SCR denitration catalyst. Aiming at the problems of complex process, low purity of extract and high recovery cost of a liquid phase method for separating a vanadium-titanium-based selective reduction catalyst (SCR) at the present stage, the invention provides a method for recovering metal and silicon dioxide from an SCR denitration catalyst. The separation efficiency and purity of the valuable metal compounds are improved, the treatment cost is reduced, and the value of separating the valuable metal compounds is improved. 本发明涉及废弃烟气脱硝催化剂回收领域，具体为一种从SCR脱硝催化剂回收有价金属化合物及去除硅的方法。针对现阶段液相法分离钒钛基选择性还原催化剂（SCR）在工艺复杂，提取物的纯度低和回收成本高的问题，本发明提供一种从SCR脱硝催化剂回收金属及二氧化硅的方法，通过提高物质的溶出和提取的选择性，提高有价金属化合物的分离效率和纯度，降低处理成本，提高分离有价金属化合物的价值。