[Chinese aluminum industry network] In the sodium aluminate solution made of bauxite, limestone, and soda, a lithium-containing solution made of spodumene, lime, and caustic soda is added, and this mixed solution is subjected to carbonation decomposition. The precipitated lithium hydroxide containing aluminum hydroxide is calcined to obtain lithium-containing alumina. Lithium-bearing aluminum oxide is used for the electrolytic production of aluminum, but it is not necessary to supplement lithium carbonate, and the power consumption per ton of aluminum can also be reduced by about 500 degrees. Therefore, if the conversion cost of lithium carbonate is reduced by 50-62.5%.
It has the characteristics of simple process, low investment in equipment, significant economic benefits, etc. It is suitable for the production of alumina by sintering method. A production process of lithium-containing alumina is characterized in that lithium-containing solution obtained by separating and washing residues after being subjected to high-pressure leaching from spodumene, lime, and caustic soda-ground mixture is added to bauxite, The raw slurry prepared from limestone and soda ash is subjected to sintering and clinker dissolution in a sodium aluminate solution, and the mixed solution is subjected to carbonation decomposition. The resulting lithium hydroxide containing aluminum is baked.
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