Silicon removal method of low-grade bauxite
A bauxite and desiliconization technology, applied in the direction of alumina/hydroxide, etc., can solve the problems of poor comprehensive benefits, complex production process, high production cost, etc., to improve the ratio of aluminum to silicon, fully desiliconize the reaction, increase contact the effect of time
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[0022] The technical solutions of the present invention will be further described in detail below through specific implementations.
[0023] See figure 1 , The present invention provides a low-grade bauxite desiliconization method, including the following steps:
[0024] Iron removal by acid leaching: reacting with hydrochloric acid in low-grade bauxite particles to form acid leaching slurry; filtering the acid leaching slurry to obtain a leaching solution and iron removing filter residue; drying the iron removing filter residue to obtain iron removing bauxite. Specifically, the concentrated hydrochloric acid is added to the low-grade bauxite particles at a ratio of 1-1.4 mL of concentrated hydrochloric acid per 1 g of low-grade bauxite, and stirred at 40-80° C. for 20-40 minutes for reaction to form the acid Leaching slurry, wherein the volume fraction of the concentrated hydrochloric acid is 36% to 38%; adding water to dilute the acid leaching slurry to obtain a thin acid leachin...
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