A kind of step-by-step desiliconization and upgrading method of high-aluminum and high-silicon bauxite

Abstract

The invention belongs to the technical field of mineral processing engineering and relates to a step-by-step desiliconizing and upgrading method for high-aluminum and high-silicon bauxite. The method comprises the steps that firstly, the high-aluminum and high-silicon bauxite is subjected to rough grinding, slurry mixing is conducted, a spiral chute is adopted to conduct the first step of desiliconizing, and coarse grain bauxite concentrate ores are obtained through roughing and concentrating; secondly, middlings in the first step are combined and reground, slurry mixing is conducted, the second step of desiliconizing is conducted through a hydraulic cyclone and the spiral chute in sequence, specifically, desliming is conducted through the hydraulic cyclone firstly, settled sand of slime is subjected to roughing and concentrating through the spiral chute, and medium grain bauxite concentrate ores are obtained; and thirdly, the middlings and tailings obtained in the first and second steps are combined and subjected to floatation desiliconizing, fine grain bauxite concentrate ores are obtained through a closed floatation process. By means of the step-by-step desiliconizing and upgrading method that the coarse grain ores are enriched in the spiral chute after rough grinding, after the middlings are reground, the medium grain ores are enriched in the hydraulic cyclone united with the spiral chute, and tailing fine slime flotation is conducted to enrich the fine grain ores, the bauxite concentrate ores of different grain grades are obtained by stages, so that the step-by-step desiliconizing and upgrading method has the advantages that drug consumption is low, the recovery rate is high, and desiliconizing is thorough.

Description

technical field

[0001] The invention relates to a step-by-step desiliconization and upgrading method of high-alumina and high-silicon bauxite, which belongs to the field of mineral processing engineering. Background technique

[0002] my country is the world's largest producer and consumer of aluminum. Bauxite is the main raw material for the aluminum industry. The amount of bauxite resources in my country ranks 9th in the world, the reserves are medium and the quality is not high. Due to the main characteristics of draumite type, it cannot meet the raw material requirements of the Bayer process for alumina production (A / S>8). Therefore, ore dressing and desiliconization to obtain high-alumina-silicon ratio concentrates are the main tasks for the separation of bauxite in my country. Purpose.

[0003] In recent years, with the continuous improvement of mineral processing technology, the beneficiation and desiliconization process of high-silicon bauxite has achieved remark...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0027] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite (mine sample I), which contains Al 2 o 3 65.41wt%, SiO 2 13.15wt%, the aluminum-silicon ratio (A / S) is 4.97, the main aluminum minerals are diaspore (48.21wt%) and boehmite (17.20wt%), and the remaining gangue minerals are kaolinite, Mainly illite and quartz. The ore sample was crushed, screened and ground to -200 mesh to account for 70%, water was added to adjust the slurry concentration to 15% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0028] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ore selection ...

Embodiment 2

[0032] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0033] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite (mine sample II), which contains Al 2 o 3 66.57wt%, SiO 2 12.42wt%, the aluminum-silicon ratio (A / S) is 5.36, the main aluminum minerals are diaspore (52.03wt%) and boehmite (14.54wt%), and the remaining gangue minerals are kaolinite, Mainly muscovite and quartz. The ore sample was crushed, screened and ground to -200 mesh to account for 70%, water was added to adjust the slurry concentration to 15% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0034] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ore selectio...

Embodiment 3

[0038] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0039] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite ore (mine sample III), which contains Al 2 o 3 64.78wt%, SiO 2 12.82wt%, the aluminum-silicon ratio (A / S) is 5.05, the main aluminum minerals are diaspore (49.53wt%) and boehmite (15.25wt%), and the rest of the gangue minerals are quartz, leaf wax Stone, kaolinite and so on. The ore sample was crushed, screened and ground to -200 mesh to account for 75%, water was added to adjust the pulp concentration to 20% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0040] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ...

technical field

[0001] The invention relates to a step-by-step desiliconization and upgrading method of high-alumina and high-silicon bauxite, which belongs to the field of mineral processing engineering. Background technique

[0002] my country is the world's largest producer and consumer of aluminum. Bauxite is the main raw material for the aluminum industry. The amount of bauxite resources in my country ranks 9th in the world, the reserves are medium and the quality is not high. Due to the main characteristics of draumite type, it cannot meet the raw material requirements of the Bayer process for alumina production (A / S>8). Therefore, ore dressing and desiliconization to obtain high-alumina-silicon ratio concentrates are the main tasks for the separation of bauxite in my country. Purpose.

[0003] In recent years, with the continuous improvement of mineral processing technology, the beneficiation and desiliconization process of high-silicon bauxite has achieved remark...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0027] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite (mine sample I), which contains Al 2 o 3 65.41wt%, SiO 2 13.15wt%, the aluminum-silicon ratio (A / S) is 4.97, the main aluminum minerals are diaspore (48.21wt%) and boehmite (17.20wt%), and the remaining gangue minerals are kaolinite, Mainly illite and quartz. The ore sample was crushed, screened and ground to -200 mesh to account for 70%, water was added to adjust the slurry concentration to 15% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0028] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ore selection ...

Embodiment 2

[0032] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0033] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite (mine sample II), which contains Al 2 o 3 66.57wt%, SiO 2 12.42wt%, the aluminum-silicon ratio (A / S) is 5.36, the main aluminum minerals are diaspore (52.03wt%) and boehmite (14.54wt%), and the remaining gangue minerals are kaolinite, Mainly muscovite and quartz. The ore sample was crushed, screened and ground to -200 mesh to account for 70%, water was added to adjust the slurry concentration to 15% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0034] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ore selectio...

Embodiment 3

[0038] Such as figure 1 As shown, the step-by-step desiliconization and upgrading method of this high-alumina and high-silicon type bauxite, its specific steps are as follows:

[0039] (1) The first step of gravity desiliconization in the spiral chute: the high-aluminum high-silicon bauxite ore (mine sample III), which contains Al 2 o 3 64.78wt%, SiO 2 12.82wt%, the aluminum-silicon ratio (A / S) is 5.05, the main aluminum minerals are diaspore (49.53wt%) and boehmite (15.25wt%), and the rest of the gangue minerals are quartz, leaf wax Stone, kaolinite and so on. The ore sample was crushed, screened and ground to -200 mesh to account for 75%, water was added to adjust the pulp concentration to 20% (m / v), and a spiral chute was used to carry out a roughing and a beneficiation respectively, and the concentrate of the spiral chute was Coarse-grained bauxite concentrate.

[0040] (2) The second step of hydrocyclone combined with spiral chute gravity desiliconization: the rough ...

Images