Ingredient mother liquid floating object recovery method

The invention discloses an ingredient mother liquid floating object recovery method, which is characterized in that the ingredient mother liquid is pumped into a settling tank baiting tube for free settling by a pump, then, the ingredient mother liquid is settled and separated and is subjected to bottom flow filtering, filtering cake Al(OH)3 is sent into an ingredient decomposition groove to be used as seeds, and filter liquid and settling separation over flown flow are simultaneously sent into an evaporation work procedure for evaporation. Compared with the prior art, the method has the following advantages that: 1, the floating object content in the ingredient mother liquid is reduced to 0.05 to 0.2g/l, the evaporation efficiency is greatly improved, and the operation period of an evaporator is prolonged; and 2, the production flow process of returning Al(OH)3 back to the production is reduced, and the yield of the Al(OH)3 and the Bayer circulation efficiency are improved.