Method for rapidly preparing bayerite

The invention relates to a method for rapidly preparing bayerite. The method comprises the following steps of: 1) preparing aluminium-salt aqueous solution and nickel-salt aqueous solution; 2) using the aluminium-salt aqueous solution and the nickel-salt aqueous solution to prepare aluminium-nickel mixing solution with the aluminium/nickel molar ratio being 1:3-1:10, regulating pH of the mixing solution to be 7.5-8.5; 3) placing the mixing solution in a constant-temperature incubator, and standing for 20-30 days; 4) filtering the mixing solution after standing by using a 0.45mu m filtering membrane to carry out solid-liquid separation, and collecting solid phases; 5) cleaning the solid phase for 3 times by weakly-acid solution, and after cleaning for 3 times by high-purity water, drying atthe normal temperature to obtain the bayerite. When the method is used for preparing the bayerite, the preparation is simple and convenient and the operation is simple and easy in implementation. 本发明涉及种快速制备拜耳石的方法，该方法包括以下步骤：1