CN1947851A - Selective flocculant for reverse flotation of bauxite and application method thereof - Google Patents
Selective flocculant for reverse flotation of bauxite and application method thereof Download PDFInfo
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- CN1947851A CN1947851A CN 200610137992 CN200610137992A CN1947851A CN 1947851 A CN1947851 A CN 1947851A CN 200610137992 CN200610137992 CN 200610137992 CN 200610137992 A CN200610137992 A CN 200610137992A CN 1947851 A CN1947851 A CN 1947851A
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- bauxite
- selective
- starch
- phosphatization
- diaspore
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Abstract
A selective flocculating agent for reverse flotation of bauxite and a using method thereof relate to a selective flocculating process for reverse flotation of bauxite. The selective flocculant is phosphated starch, when in use, raw ore is ground, the pH value of ore pulp is adjusted, a dispersant is added, and the phosphated starch is added into the fully-dispersed and stably-suspended ore pulp to flocculate the diaspore mineral, while the siliceous gangue mineral keeps lasting dispersion. The method of the invention adopts the phosphated starch as the selective flocculant, and has the advantages of low consumption, low price, low toxicity, good selectivity and the like. Diaspore and the like form compact floc which sinks to the bottom, and gangue is suspended permanently, so that the selective flocculation problem of reverse flotation desilication of bauxite is successfully solved. Slime with yield of more than 7 percent and aluminum-silicon ratio of less than 1.7 is removed, so that a considerable part of gangue is removed and the recovery of fine-fraction diaspore is kept.
Description
Technical field
A kind of selective flocculant and using method thereof that is used for inverse floatation of bauxite relates to a kind of selective flocculation process of inverse floatation of bauxite.
Background technology
Main valuable mineral is diaspore, boehmite, gibbsite etc. in the bauxite, gangue mineral then mainly is that kaolinite, illite, pyrophyllite, chlorite etc. contain aluminosilicate, has common active points-aluminium between valuable mineral and gangue mineral.Each gangue mineral is argillization very easily, and the existence of mud has greatly worsened reverse flotation, even reverse flotation can't be carried out.So the selective flocculation of valuable mineral becomes a key of reverse flotation.
Present flocculant is disclosed to be had: 1, polyacrylamide and modified product thereof, and selectivity is not good, and the pharmacy quality fluctuation is big; 2, ative starch, consumption is big, poor selectivity; 3, hydroxamic acid starch costs an arm and a leg, the synthesis technique complexity.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provide a kind of low consumption, at a low price, low toxicity, selectivity be good, selective flocculant that is used for inverse floatation of bauxite and the using method thereof that can effectively valuable minerals such as diaspore in the bauxite be flocculated by selectivity.
The objective of the invention is to be achieved through the following technical solutions.
A kind of selective flocculant that is used for inverse floatation of bauxite is characterized in that its selective flocculant is a phosphatization starch.
A kind of using method that is used for the selective flocculant of inverse floatation of bauxite of the present invention, when it is characterized in that using successively raw ore levigate, adjust slurry pH, add dispersant, phosphatization starch in the ore pulp that abundant stably dispersing suspends, with the flocculation of the poly-group of diaspore mineral, and siliceous gangue mineral keeps disperseing lastingly.
A kind of using method that is used for the selective flocculant of inverse floatation of bauxite of the present invention is characterized in that the phosphatization amount of starch in the adding ore pulp of fully stably dispersing suspension is 60～120g/t-
Raw ore
A kind of using method that is used for the selective flocculant of inverse floatation of bauxite of the present invention, it is characterized in that phosphatization starch is and the NaOH mixing, be made into and add the weight ratio 4 that its phosphatization starch mixes with NaOH: 1-5: 1 behind the aqueous solution, be heated to 80～90 ℃ rapidly, use water-bath cooling back.
Method of the present invention adopts phosphatization starch as selective flocculant, have low consumption, at a low price, low toxicity, good selective.In the ore pulp that fully disperses, add a certain amount of phosphatization starch solution, leave standstill after fully stirring, can be so that valuable minerals such as diaspore be gathered group flocculation, and siliceous gangue mineral keeps disperseing, thus form particle size differences, can remove productive rate＞7%, the sludge of alumina silica ratio＜1.7; Remove by-0.01mm grade, the considerable part gangue is rejected and keep recovery the fine fraction diaspore.Valuable mineral strong effect such as phosphatization starch of the present invention and diaspore and hardly with each gangue mineral effect, thereby produce selective flocculation.
The specific embodiment
A kind of selective flocculant that is used for inverse floatation of bauxite, its selective flocculant are phosphatization starch.During use successively raw ore levigate, adjust slurry pH, add dispersant, in the ore pulp that fully stably dispersing suspends, add phosphatization starch, with the flocculation of the poly-group of diaspore mineral, and siliceous gangue mineral keeps lasting and disperses.Phosphatization amount of starch in the adding ore pulp of fully stably dispersing suspension is 60～120g/t-
Raw orePhosphatization starch is and the NaOH mixing, is made into to add behind the aqueous solution weight ratio 4 that its phosphatization starch mixes with NaOH: 1-5: 1, be heated to 80～90 ℃ rapidly, and use water-bath cooling back.
During concrete operations, raw ore is milled to-more than the 0.074mm60%, adjust slurry pH to 9.9～11.0, add dispersant and fully disperse ore pulp, in the ore pulp of stable suspersion, add the phosphatization starch solution for preparing, wherein contain phosphatization starch 60～120g/t, after stirring is static, the flocculation of the poly-group of diaspore mineral, and siliceous gangue mineral keeps disperseing, the diaspore mineral that adopt the siphon mode separation method will gather a flocculation separate with the siliceous gangue mineral of particulate that keeps disperseing.
Embodiment 1
Experimental selection hard kaolinite and diaspore minal;
Phosphatization starch is and the NaOH mixing, is made into to add behind the aqueous solution, and the weight ratio that its phosphatization starch mixes with NaOH 4: 1 is heated to 90 ℃ rapidly, and use water-bath cooling back.
With 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 1 behind the mixing; Add clear water, stir on magnetic stirring apparatus, pulp density 10% adds Na
2CO
37Kg/t, pH values of pulp 9.9; Add calgon 120g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 60g/t, 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, pH values of pulp 11.0; Add calgon 30g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 20g/t, 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 1.
Table 1: raw 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 | 6.14 | 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
Phosphatization starch is and the NaOH mixing, is made into to add behind the aqueous solution, and the weight ratio that its phosphatization starch mixes with NaOH 4.5: 1 is heated to 80 ℃ rapidly, and use water-bath cooling back.
Experimental selection-0.01mm illite minal accounts for 60% diaspore minal with-0.074mm grade, and the former gets 3g, and the latter gets 2g, makes raw ore behind the mixing; Add clear water, stir on magnetic stirring apparatus, pulp density 10% adds Na
2CO
37Kg/t, pH values of pulp 9.9; Add calgon 60g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 80g/t, 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, pH values of pulp 11.0; Add calgon 30g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 20g/t, 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.
Result of the test shows that isolated suspension productive rate is 44.8%, and its chemical analysis results is Al
2O
3Content 40.23%, SiO
2Content 42.70%.The illite removal efficiency reaches 72.0%, and diaspore has only lost 0.4%.
Embodiment 3
Phosphatization starch is and the NaOH mixing, is made into to add behind the aqueous solution, and the weight ratio that its phosphatization starch mixes with NaOH 5: 1 is heated to 85 ℃ rapidly, and use water-bath cooling back.
Justice bauxite somewhere, the mountain raw ore of experimental selection alumina silica ratio 4.45 is milled to-74 μ m and accounts for 80%, adds clear water, stirs on magnetic stirring apparatus, and pulp density 10% adds Na
2CO
37.5Kg/t, pH values of pulp 9.9; Add calgon 60g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 60g/t, 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, pH values of pulp 11.0; Add calgon 30g/t, stir 3min; Add the phosphatization starch solution for preparing, wherein contain phosphatization starch 20g/t, 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.Desliming the results are shown in Table 2.
Table 2 raw ore 3 desliming results
| 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 | 35.52 | 1.16 | 4.01 | 14.42 |
| Mud 2 | 2.68 | 44.70 | 30.16 | 1.48 | 2.04 | 5.75 |
| Underflow | 91.61 | 60.09 | 12.25 | 4.91 | 93.95 | 79.83 |
| Raw ore 3 | 100.00 | 58.60 | 14.06 | 4.17 | 100.00 | 100.00 |
Claims (4)
1. a selective flocculant that is used for inverse floatation of bauxite is characterized in that its selective flocculant is a phosphatization starch.
2. using method that is used for the selective flocculant of inverse floatation of bauxite, when it is characterized in that using successively raw ore levigate, adjust slurry pH, add dispersant, phosphatization starch in the ore pulp that abundant stably dispersing suspends, with the flocculation of the poly-group of diaspore mineral, and siliceous gangue mineral keeps disperseing lastingly.
3. a kind of using method that is used for the selective flocculant of inverse floatation of bauxite according to claim 1 is characterized in that the phosphatization amount of starch in the adding ore pulp of fully stably dispersing suspension is 60～120g/t-
Raw ore
4. a kind of using method that is used for the selective flocculant of inverse floatation of bauxite according to claim 1, it is characterized in that phosphatization starch is and the NaOH mixing, be made into and add behind the aqueous solution, the weight ratio 4 that its phosphatization starch mixes with NaOH: 1-5: 1, be heated to 80～90 ℃ rapidly, use water-bath cooling back.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101379928A CN100393422C (en) | 2006-11-03 | 2006-11-03 | Use method of selective flocculant for reverse flotation of bauxite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101379928A CN100393422C (en) | 2006-11-03 | 2006-11-03 | Use method of selective flocculant for reverse flotation of bauxite |
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|---|---|
| CN1947851A true CN1947851A (en) | 2007-04-18 |
| CN100393422C CN100393422C (en) | 2008-06-11 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589882C (en) * | 2007-12-17 | 2010-02-17 | 中国铝业股份有限公司 | Deposition dehydrating method for processing concentrate or tailing by bauxite |
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN105080730A (en) * | 2015-09-10 | 2015-11-25 | 刘海平 | Silicon reduction and impurity removal method for low-grade bauxite |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1252152B (en) * | 1965-07-08 | |||
| US4569768A (en) * | 1983-10-07 | 1986-02-11 | The Dow Chemical Company | Flocculation of suspended solids from aqueous media |
| CN1169625C (en) * | 2001-10-23 | 2004-10-06 | 中南大学 | Chelating macromolecular inhibitor for reverse flotation of bauxite and preparation method thereof |
| CN1621159A (en) * | 2004-12-28 | 2005-06-01 | 中国铝业股份有限公司 | Flotation gangue subsidence method of alumyte |
-
2006
- 2006-11-03 CN CNB2006101379928A patent/CN100393422C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589882C (en) * | 2007-12-17 | 2010-02-17 | 中国铝业股份有限公司 | Deposition dehydrating method for processing concentrate or tailing by bauxite |
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN105080730A (en) * | 2015-09-10 | 2015-11-25 | 刘海平 | Silicon reduction and impurity removal method for low-grade bauxite |
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| Publication number | Publication date |
|---|---|
| CN100393422C (en) | 2008-06-11 |
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Granted publication date: 20080611 Termination date: 20121103 |