Flotation method for removing potassium from potassium-containing bauxite

Abstract

The invention discloses a flotation method for removing potassium from potassium-containing bauxite. The flotation method comprises the following steps: (1) grinding the potassium-containing bauxite until the potassium-containing bauxite with the fineness of-0.074 mm accounts for 85-95% of the total mass; (2) performing direct flotation on the potassium-containing bauxite obtained in the step (1)to remove potassium; (3) carrying out reverse flotation potassium removal on the direct flotation underflow obtained by the direct flotation potassium removal in the step (2); in the direct flotationpotassium removal process, the adopted direct flotation potassium removal collecting agent is selected from one or more than two of sodium oleate, benzohydroxamic acid or oxidized paraffin soap; in the reverse flotation potassium removal process, the adopted reverse flotation potassium removal collecting agent is selected from one or more than two of dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride or hexadecyl trimethyl ammonium bromide; in the reverse flotation potassium removal process, a reverse flotation inhibitor is adopted, and the reverse flotation inhibitor is selected from starch and / or dextrin. According to the flotation method for removing potassium from potassium-containing bauxite, the potassium oxide removal rate is remarkably increased.

Description

technical field

[0001] The invention belongs to the technical field of bauxite flotation, and in particular relates to a flotation method for removing potassium from potassium-containing bauxite. Background technique

[0002] K in some bauxite mines in Guizhou, Henan and Shanxi provinces 2 O content usually exceeds 1%, and potassium ore in bauxite mainly exists in silicate gangue minerals.

[0003] During the production of alumina by the Bayer process, the presence of illite and other potassium-containing silicate minerals causes the continuous circulation and accumulation of potassium ions in the sodium aluminate solution, which easily leads to the refinement of seed crystal particles during the decomposition process, the reduction of decomposition rate, and the breakdown of alumina. Increased potassium content in products and other issues. In the production process of using potassium-containing bauxite tissue, K in alumina products 2 The O content will increase to about...

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