CN1947850A - Reverse flotation desliming method for bauxite - Google Patents

Reverse flotation desliming method for bauxite Download PDF

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Publication number
CN1947850A
CN1947850A CN 200610137993 CN200610137993A CN1947850A CN 1947850 A CN1947850 A CN 1947850A CN 200610137993 CN200610137993 CN 200610137993 CN 200610137993 A CN200610137993 A CN 200610137993A CN 1947850 A CN1947850 A CN 1947850A
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raw ore
bauxite
add
adjust
catechol
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CN 200610137993
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CN100393421C (en
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张云海
吴熙群
郑桂兵
曾克文
任爱军
刘水红
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XIAOYI TIANZHANG ALUMINIUM CO Ltd
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Beijing General Research Institute of Mining and Metallurgy
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Abstract

A bauxite reverse flotation desliming method relates to a bauxite reverse flotation process, which is characterized in that the process grinds the bauxite to be more than-0.074 mm 60%; adjusting the concentration and the pH of the ore pulp, and stirring uniformly; adding catechol, and uniformly adjusting; adding phosphated starch to flocculate diaspore mineral, and after the ore pulp is layered, removing suspended argillized gangue mineral by using particle size difference and siphonage method, while the useful mineral of fine particle fraction has little loss. The method of the invention has little loss of useful minerals while removing fine-grained gangue, and is very beneficial to the subsequent reverse flotation desilication process. Adjusting the pH value of the ore pulp to 9.9-11.0, and then sequentially adding a dispersant catechol and a flocculating agent phosphated starch to form flocculation layering. The siliceous gangue minerals are dispersed and suspended durably, and the diaspore is flocculated into lumps to settle quickly, so that the argillized gangue minerals are removed.

Description

A kind of method for reverse-floatation mud-removing for bauxite
Technical field
A kind of method for reverse-floatation mud-removing for bauxite relates to a kind of technical process of inverse floatation of bauxite.
Background technology
Gangue mineral mainly is clay minerals such as kaolinite, illite, pyrophyllite, chlorite in the bauxite, and crystallization carefully loose to form primary slime, hardness very low again in the comminution process argillization very easily, form secondary slime.Present studies show that during inverse floatation of bauxite, the existence of sludge has greatly worsened separating effect in the system, so removing of mud becomes the task of top priority.
At present, desliming technology has following several both at home and abroad: 1, natural desliming.The a large amount of valuable minerals such as particulate diaspore of result also run off thereupon.2, adopt inorganic salts to make dispersant.Significantly changed the floatability of each mineral composition, totally unfavorable for follow-up reverse flotation.3, adopt polyacrylamide and derivative thereof or causticity starch to make flocculant, poor selectivity.Floc sedimentation manifests strongly and is mingled with.
Summary of the invention
The objective of the invention is to overcome the deficiency that above-mentioned prior art exists, and a kind of sorting index height is provided, good separating effect, the Desliming method that is complementary with the inverse floatation of bauxite desiliconization.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method for reverse-floatation mud-removing for bauxite is characterized in that its process is with bauxite Milling; Adjust pulp density and adjust pH values of pulp, after stirring; Add catechol, adjust evenly; Add phosphatization starch again and make the valuable mineral diaspore form flocculation, gangue mineral then disperses lastingly; After the ore pulp layering, utilize particle size differences, use siphonage the argillization gangue mineral that suspends is removed.
A kind of method for reverse-floatation mud-removing for bauxite of the present invention is characterized in that its technical process is followed successively by:
A. account for more than 60% to-0.074mm grade raw ore is levigate;
B. adjust solid weight percent concentration to 10%～15% in the ore pulp;
C. add Na 2CO 37.0～9.9Kg/ ton- Raw ore, adjust slurry pH to 9.9～11.0;
D. add catechol 300～700 gram/tons- Raw ore, adjust evenly;
E. add phosphatization starch, 60～120 gram/tons- Raw oreAdjust evenly;
F.-10 μ m grades are removed.
A kind of method for reverse-floatation mud-removing for bauxite of the present invention, it is characterized in that the catechol that adds be 600 gram/tons- Raw oreThe phosphatization starch that adds be 100 gram/tons- Raw ore
Method of the present invention at the desliming process of inverse floatation of bauxite, is selected suitable process conditions, and pH values of pulp is adjusted to 9.9～11.0, adds dispersant catechol, flocculant phosphatization starch then successively, forms flocculation and delamination.When removing fine-grained gangue, valuable mineral loses seldom, and helps very much follow-up Counterfloatating desiliconization technology.The agglomerating rapid sedimentation of then flocculating of the lasting dispersion suspension of siliceous gangue mineral, diaspore, thus make that the gangue mineral of argillization is removed.The considerable part sludge is rejected, for Counterfloatating desiliconization is paved the way.
The specific embodiment
A kind of method for reverse-floatation mud-removing for bauxite, its technical process is followed successively by: account for more than 60% to-0.074mm grade raw ore is levigate; Adjust solid weight percent concentration to 10%～15% in the ore pulp; Add Na 2CO 37.0～9.9Kg/ ton- Raw ore, adjust slurry pH to 9.9～11.0; Adding catechol 300～700 gram/tons- Raw ore, adjust evenly; Add phosphatization starch, 60～120 gram/tons- Raw ore, adjust evenly; Leave standstill a period of time ,-10 μ m grades are removed.
Embodiment 1
Experimental selection hard kaolinite and diaspore minal, respectively with the ceramic disk disintegrating machine be broken to-the 0.074mm grade accounts for 60%, the former gets 1g, the latter gets 2g, makes raw ore behind the mixing; Add clear water, stir on magnetic stirring apparatus, pulp solids weight concentration 15% adds Na 2CO 37Kg/t- Raw ore, pH values of pulp 9.9; Add catechol 300g/t- Raw ore, stir 3min; Add phosphatization starch 60g/t- Raw ore, stir 3min; Quiescent settling is used siphonage and is extracted-10 μ m parts out, does desliming for the first time; Replenish clear water, adjust pulp solids weight concentration to 10%, add Na again 2CO 33Kg/t- Raw ore, pH values of pulp 11.0; Add catechol 200g/t- Raw ore, stir 3min; Add phosphatization starch 20g/t- Raw ore, stir 3min; Quiescent settling is used siphonage and is extracted-10 μ m parts out, does desliming for the second time; The mud of deviating from for twice merges, the oven dry chemical examination, and final desliming the results are shown in Table 1.Separation results sees Table 1
Table 1: artificial mixed ore 1 desliming result of the test
Product Productive rate (%) Grade (%) A/S The rate of recovery (%)
Al 2O 3 SiO 2 Al 2O 3 SiO 2
Mud 17.67 41.55 32.26 1.29 11.01 37.08
Underflow 82.33 72.07 11.75 6.13 88.99 62.92
Raw ore 1 100.00 66.68 15.37 4.34 100.00 100.00
As can be seen from Table 1, after twice desliming, removed 37.08% SiO 2, only lose 11.01% Al 2O 3, consider that kaolinite also contains aluminium, the diaspore of particulate only has seldom part loss.
Embodiment 2:
Select the bauxite raw ore.Behind the bauxite muck, wet grinding in the ball milling is milled to-0.074 μ m and accounts for 80%; Add clear water, stir on magnetic stirring apparatus, pulp solids weight concentration 12% adds Na 2CO 38Kg/t- Raw ore, pH values of pulp 10.1; Add catechol 600g/t- Raw ore, stir 3min; Add phosphatization starch 120g/t- Raw ore, stir 3min; Quiescent settling is used siphonage extraction-10um part, does desliming for the first time; Replenish clear water, add Na again 2CO 33Kg/t- Raw ore, pH values of pulp 10.5; Add catechol 120g/t- Raw ore, stir 3min; Add phosphatization starch 40g/t- Raw ore, stir 3min; Quiescent settling is used siphonage extraction-10um part, does desliming for the second time; The mud of deviating from for twice merges, the oven dry chemical examination, and final desliming the results are shown in Table 2.
Table 2: raw ore 2 desliming result of the tests
Name of product Productive rate (%) Grade (%) A/S The rate of recovery (%)
Al 2O 3 SiO 2 Al 2O 3 SiO 2
Mud 1 5.71 41.16 31.52 1.31 3.64 16.28
Mud 2 2.68 44.70 26.16 1.71 1.86 6.34
Underflow 91.61 66.53 9.34 7.12 94.50 77.38
Raw ore 2 100.00 64.50 11.06 5.83 100.00 100.00
Embodiment 3
Experimental selection bauxite raw ore.Behind the bauxite muck, wet grinding in the ball milling is milled to-0.074 μ m and accounts for 80%; Add clear water, stir on magnetic stirring apparatus, pulp solids weight percent concentration 10% adds Na 2CO 39.9Kg/t- Raw ore, pH values of pulp 11; Add catechol 700g/t- Raw ore, stir 3min; Add phosphatization starch 72g/t- Raw ore, stir 3min; Quiescent settling is used siphonage and is extracted-10 μ m parts out, does desliming for the first time; Replenish clear water, add Na again 2CO 33Kg/t- Raw ore, pH values of pulp 10.5; Add catechol 120g/- Raw ore, stir 3min; Add phosphatization starch 32g/t- Raw ore, stir 3min; Quiescent settling is used siphonage and is extracted-10 μ m parts out, does desliming for the second time; The mud of deviating from for twice merges, the oven dry chemical examination, and final desliming the results are shown in Table 3.
Table 3: raw ore 3 result of the tests
Product Productive rate (%) Grade (%) A/S The rate of recovery (%)
Al 2O 3 SiO 2 Al 2O 3 SiO 2
Mud 1 8.32 37.42 31.52 1.19 4.88 23.35
Mud 2 1.92 38.17 30.26 1.26 1.15 5.17
Mud 10.24 37.56 31.28 1.20 6.02 28.53
Underflow 89.76 66.84 8.94 7.47 93.98 71.47
Raw ore 3 100.00 63.84 11.23 5.68 100.00 100.00
Embodiment 4
Experimental selection bauxite raw ore.Behind the bauxite muck, wet grinding in the ball milling is milled to-0.074 μ m and accounts for 85%; Add clear water, the powerful stirring in agitator, pulp solids weight concentration 10% adds Na 2CO 38.4Kg/t- Raw ore, pH values of pulp 10.6; Add catechol 600g/t- Raw ore, stir 3min; Add phosphatization starch 90g/t- Raw ore, stir 3min; Quiescent settling in the desliming bucket ,-10 μ m part is discharged as overflow, does desliming for the first time; Replenish clear water, add Na again 2CO 33Kg/t- Raw ore, pH values of pulp 10.5; Add catechol 120g/t- Raw ore, stir 3min; Add phosphatization starch 32g/t- Raw ore, stir 3min; Quiescent settling in the desliming bucket ,-10um part is discharged as overflow, does desliming for the second time; The mud of deviating from for twice merges, the oven dry chemical examination, and final desliming the results are shown in Table 4.
Table 4: raw ore 4 desliming result of the tests
Product Productive rate (%) Grade (%) A/S The rate of recovery (%)
Al 2O 3 SiO 2 Al 2O 3 SiO 2
Mud 1 11.32 40.85 29.28 1.40 7.54 26.44
Mud 2 7.89 39.77 27.78 1.43 5.11 17.49
Mud 19.21 40.41 28.66 1.41 12.65 43.93
Underflow 80.79 66.35 8.70 7.63 87.35 56.07
Raw ore 4 100.00 61.37 12.54 4.90 100.00 100.00

Claims (3)

1. a method for reverse-floatation mud-removing for bauxite is characterized in that its process is with bauxite Milling; Adjust pulp density and adjust pH values of pulp, after stirring; Add catechol, adjust evenly; Add phosphatization starch again and make the valuable mineral diaspore form flocculation, gangue mineral then disperses lastingly; After the ore pulp layering, utilize particle size differences, use siphonage the argillization gangue mineral that suspends is removed.
2. a kind of method for reverse-floatation mud-removing for bauxite according to claim 1 is characterized in that its technical process is followed successively by::
G. account for more than 60% to-0.074mm grade raw ore is levigate;
H. adjust solid weight percent concentration to 10%～15% in the ore pulp;
I. add Na 2CO 37.0～9.9Kg/ ton- Raw ore, adjust slurry pH to 9.9～11.0;
J. add catechol 300～700 gram/tons- Raw ore, adjust evenly;
K. add phosphatization starch, 60～120 gram/tons- Raw oreAdjust evenly;
L.-10 μ m grades are removed.
3. a kind of method for reverse-floatation mud-removing for bauxite according to claim 1, it is characterized in that the catechol that adds be 600 gram/tons- Raw oreThe phosphatization starch that adds be 100 gram/tons- Raw ore
CNB2006101379932A 2006-11-03 2006-11-03 Reverse flotation desliming method for bauxite Expired - Fee Related CN100393421C (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844112A (en) * 2010-06-30 2010-09-29 中南大学 Application of collecting agent in reverse floatation of bauxite
CN102489385A (en) * 2011-12-12 2012-06-13 云南三明鑫疆矿业有限公司 Combined technology of phosphorite scrubbing and direct floatation and reverse floatation
CN103736600A (en) * 2013-12-30 2014-04-23 河南省岩石矿物测试中心 Method for desiliconizing bauxite
CN105080727A (en) * 2015-08-28 2015-11-25 东北大学 Method for reverse flotation decarbonization for titanium diboride obtained through arc furnace
CN109290072A (en) * 2018-09-27 2019-02-01 山东理工大学 A kind of spodumene mine selective flocculation-Desliming method
WO2019067433A1 (en) * 2017-09-26 2019-04-04 Ecolab Usa Inc. Methods and compositions for bauxite beneficiation
CN110449256A (en) * 2019-07-31 2019-11-15 中国恩菲工程技术有限公司 The beneficiation method of bastnaesite

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB563045A (en) * 1941-10-21 1944-07-27 American Cyanamid Co Improvements in bauxite beneficiation
GB868560A (en) * 1958-12-24 1961-05-17 Nova Beaucage Mines Ltd Flotation process
US4960536A (en) * 1989-03-09 1990-10-02 Sandoz Ltd. Carboxyalkylated derivatives of alkyl and alkenyl catechol ethoxylates and detergent compositions containing same
CN1270830C (en) * 2004-10-29 2006-08-23 东北大学 Highly efficient ore dressing system of medium-low class aluminium ore
CN1778472A (en) * 2004-11-26 2006-05-31 中南大学 Dispersion and control-selective desliming method in bauxite

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844112A (en) * 2010-06-30 2010-09-29 中南大学 Application of collecting agent in reverse floatation of bauxite
CN101844112B (en) * 2010-06-30 2013-06-19 中南大学 Application of collecting agent in reverse floatation of bauxite
CN102489385A (en) * 2011-12-12 2012-06-13 云南三明鑫疆矿业有限公司 Combined technology of phosphorite scrubbing and direct floatation and reverse floatation
CN103736600A (en) * 2013-12-30 2014-04-23 河南省岩石矿物测试中心 Method for desiliconizing bauxite
CN103736600B (en) * 2013-12-30 2016-07-06 河南省岩石矿物测试中心 Method for desiliconizing bauxite
CN105080727A (en) * 2015-08-28 2015-11-25 东北大学 Method for reverse flotation decarbonization for titanium diboride obtained through arc furnace
CN105080727B (en) * 2015-08-28 2017-05-24 东北大学 Method for reverse flotation decarbonization for titanium diboride obtained through arc furnace
WO2019067433A1 (en) * 2017-09-26 2019-04-04 Ecolab Usa Inc. Methods and compositions for bauxite beneficiation
US10793444B2 (en) 2017-09-26 2020-10-06 Ecolab Usa Inc. Methods and compositions for bauxite beneficiation
AU2018339457B2 (en) * 2017-09-26 2023-11-09 Ecolab Usa Inc. Methods and compositions for bauxite beneficiation
CN109290072A (en) * 2018-09-27 2019-02-01 山东理工大学 A kind of spodumene mine selective flocculation-Desliming method
CN110449256A (en) * 2019-07-31 2019-11-15 中国恩菲工程技术有限公司 The beneficiation method of bastnaesite

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