Step-by-step desiliconizing and upgrading method for high-aluminum and high-silicon bauxite
A technology for desiliconization of bauxite, which is applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of high chemical consumption in flotation, high separation cost, and high energy consumption in grinding, so as to avoid desiliconization. Poor silicon effect, reduced amount of beneficiation, simple and flexible process
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[0025] Example 1
[0026] like figure 1 As shown, the step-by-step desiliconization and upgrading method of the high-aluminum and high-silicon type bauxite has the following specific steps:
[0027] (1) The first step of gravity separation and desiliconization of spiral chute: high-alumina and high-silicon bauxite (ore sample I), which contains Al 2 O 3 65.41wt%, SiO 2 13.15wt%, the ratio of aluminum to silicon (A / S) is 4.97, the main aluminum minerals are diaspore (48.21wt%) and boehmite (17.20wt%), and the remaining gangue minerals are kaolinite, Illite and quartz are the main ones. The ore sample is crushed, screened and ground to -200 mesh, accounting for 70%, and water is added to adjust the slurry concentration to 15% (m / v). The spiral chute is used to carry out a roughing and a selection respectively. The concentrate of the spiral chute is Coarse-grained bauxite concentrate.
[0028] (2) The second step of hydrocyclone combined with spiral chute for gravity separa...
Example Embodiment
[0031] Example 2
[0032] like figure 1 As shown, the step-by-step desiliconization and upgrading method of the high-aluminum and high-silicon type bauxite has the following specific steps:
[0033] (1) The first step of gravity separation and desiliconization in spiral chute: high-alumina and high-silicon bauxite (ore sample II), which contains Al 2 O 3 66.57wt%, SiO 2 12.42wt%, the ratio of aluminum to silicon (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 is crushed, screened and ground to -200 mesh, accounting for 70%, and water is added to adjust the slurry concentration to 15% (m / v). The spiral chute is used to carry out a roughing and a selection respectively. The concentrate of the spiral chute is Coarse-grained bauxite concentrate.
[0034] (2) The second step of hydrocyclone combined with spiral chute for gravity separation and ...
Example Embodiment
[0037] Example 3
[0038] like figure 1 As shown, the step-by-step desiliconization and upgrading method of the high-aluminum and high-silicon type bauxite has the following specific steps:
[0039] (1) The first step of gravity separation and desiliconization in spiral chute: high-alumina and high-silicon bauxite (ore sample III), which contains Al 2 O 3 64.78wt%, SiO 2 12.82wt%, the ratio of aluminum to silicon (A / S) is 5.05, the main aluminum minerals are diaspore (49.53wt%) and boehmite (15.25wt%), and the remaining gangue minerals are quartz, pyrophyllite Stone, kaolinite, etc. The ore sample is crushed, screened and ground to -200 mesh, accounting for 75%, and water is added to adjust the slurry concentration to 20% (m / v). The spiral chute is used to carry out a roughing and a selection respectively. The concentrate in the spiral chute is Coarse-grained bauxite concentrate.
[0040] (2) The second step of hydrocyclone combined with spiral chute for gravity separati...
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