CN1806930A - Aluminium-iron separating and comprehensive utilizing method for high iron bauxite - Google Patents
Aluminium-iron separating and comprehensive utilizing method for high iron bauxite Download PDFInfo
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Abstract
The invention relates the bauxite mineral concentration method. The method comprises the following steps: separating aluminum and iron from high ferro bauxite with magnetic concentration, bruising ore to 0-25mm, selecting the ore particles whose granularity is 0.074, using water as transmission medium, roughing separating the ore pulp with cobber to get roughing separation iron concentrate and roughing separation aluminum concentrate; refining them with cobber to get classification iron concentrate and classification tailings, scavenging; desliming the aluminum concentrate and getting the aluminum oxide concentrate; the classification iron concentrate carried out reverse flotation with anion to reclaim iron, after grinding, and the granularity being -400 mesh, adding modifying agent, dispersing agent, inhibiting agent and collector to carry out the first reverse flotation, then carrying out the second reverse flotation to get the rich iron concentrate and tailings.
Description
One. technical field: the present invention relates to a kind of ore concentration of bauxite method, relate to particularly that high intensity magnetic separation ferro-aluminum in a kind of high-iron bauxite separates and anion reverse floatation reclaims the method for comprehensive utilization of iron.
Two. background technology: the higher bauxite of a class iron-holder is arranged in China's bauxite resource, and it is distributed widely in the ground such as Henan, Guangxi, Shanxi of China, and oil in place is bigger.Its alumina content is more than 25%, and iron oxide content is more than 10%.Because its iron-holder height, the aluminium grade is low, is not utilized by China's aluminum smelting technology industry always.Along with the fast development of China's industry, the demand of bauxite is sharply increased, China is annual from 7,000,000 tons in external import bauxite.And the countries in the world rapid economy development also causes the growing tension of industrial raw materials supply, and alumina production cost rises, and ore resource more and more becomes the restraining factors of aluminum oxide industry development.In this case, development and use high-iron bauxite resource is to China's Aluminum sustainable development and rationally utilize national resources to have crucial social and economic significance.
Bauxite is the optimum feed stock of producing metallic aluminium, and its consumption accounts for more than 90% of world's bauxite total output.The nonmetal purposes of bauxite is to make refractory material, high-abrasive material, the raw material of chemicals and alumina cement.Bauxite is used to produce aluminium oxide sintering process, Bayer process, combination method etc.This several method be suitable for handling iron oxide content less than in 10%, low-grade bauxite.Greater than 10% bauxite, above-mentioned several method all is not suitable for adopting for iron oxide content.
For improving the grade of aluminium oxide in the high-iron bauxite, reduce the content of iron, to obtain qualified aluminium concentrate, the iron in the ore need be removed.Patent applied for 200410010400.7 has been announced the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite.But this method is very wide about the separation process and the separation condition of high intensity magnetic separation, and the process conditions more detailed to some particular mine further do not provide.In the patent of having announced, as No. 92105235.9 patents, No. 98102900.0 patents, No. 200410050751.0 patents all are to take off gangue, desiliconization about bauxite, obtain the method for diaspore concentrate, not the method for separating about the high-iron bauxite ferro-aluminum.Patent 92105205.7 has been announced a kind of method for floating that reduces ferrotitanium impurity content in the bauxite, this invention is to carry out clean surface impurity with the mineral of sulfuric acid after to fine grinding, reduces titanium, iron content in the bauxite by one roughing, recleaning, the technical process of scanning for three times.But this method also only is suitable for the bauxite of low iron content, and process is loaded down with trivial details, needs to use a large amount of acid, and also easy contaminated environment if be applied to high-iron bauxite, will cause the waste of a large amount of iron resources.
Three. summary of the invention
Purpose of the present invention: to the high intensity magnetic separation ferro-aluminum separation condition of some specific bauxite, anion reverse floatation reclaims the flotation conditions and the method for comprehensive utilization thereof of iron and further inquires on 200410010400.7 patent application bases, realizes suitability for industrialized production.
Technical scheme of the present invention: a kind of high-iron bauxite ferro-aluminum comprehensive utilization of separation method, comprise that high-iron bauxite high intensity magnetic separation ferro-aluminum separates and magnetic concentrate reclaims iron ore concentrate, adopt disintegrating machine with ore reduction to 0～25mm granularity, use grinding attachment levigate again, select granularity by grader and account for 60%～85% ore particle for-0.074mm, thicker particle returns grinding attachment fine grinding again, with water is pumped (conveying) medium, ore pulp is imported strong magnetic separator, roughly select by strong magnetic, strong magnetic is selected, the flow process that strong magnetic is scanned, iron oxide magnetic mineral in the ore pulp are separated with the aluminium oxide non magnetic ore, adopt the anion reverse floatation method that the iron in the magnetic concentrate is reclaimed, magnetic concentrate is behind ore grinding, size mixing with the adjustment agent, ore pulp is disperseed, suppress iron mineral with inhibitor with dispersant, with collecting agent to the aluminium in the magnetic concentrate, silicon mineral carries out flotation removing
(1). the iron oxide content of high-iron bauxite 〉=10%, alumina content 〉=40%;
(2). the feed ore concentration that the strong magnetic of high-iron bauxite is roughly selected is 20%～35%; The strong selected feed ore concentration of magnetic is 8%～15%;
(3). the intensity of separating the strong magnetic separator of magnetic mineral and non magnetic ore is 8000 oersteds～16000 oersteds;
(4). ore pulp is roughly selected through strong magnetic separator, isolates magnetic mineral and roughly selects concentrate iron ore concentrate and non magnetic ore rougher tailings aluminium concentrate; It is selected through strong magnetic separator to roughly select iron ore concentrate, isolates selected iron ore concentrate and cleaner tailings; Rougher tailings aluminium concentrate is scanned through strong magnetic separator, isolated and scan mine tailing and scan the aluminium concentrate; To scan the desliming of aluminium concentrate and obtain product aluminium oxide concentrate;
(5). with the iron oxide magnetic ore pulp, or the non magnetic ore pulp of aluminium oxide carries out water by vacuum filter and separates with iron oxide or aluminium oxide solid phase, obtains the oxygen enrichment iron ore concentrate respectively, or rich aluminium oxide concentrate;
(6). the grinding particle size of magnetic concentrate accounts for 84%～99% at-400 orders;
(7). the concentrate floatation concentration is 20%～45%;
(8). magnetic concentrate carries out the reverse flotation first time behind ore grinding, isolated iron ore concentrate is carried out second time reverse flotation again isolate the product iron concentrate and tailings;
(9). product aluminium concentrate grade＞68%, the rate of recovery＞70%, iron concentrate grade＞55%, the rate of recovery＞50%.
Described high-iron bauxite ferro-aluminum comprehensive utilization of separation method is selected granularity by grader and is accounted for 68%～79% ore particle for-0.074mm.
The feed ore concentration that strong magnetic is roughly selected is 22%～28%.
Described high-iron bauxite ferro-aluminum comprehensive utilization of separation method is with cleaner tailings or scan mine tailing and return strong magnetic separator and carry out magnetic separation once more.
The intensity that the strong magnetic of separation magnetic mineral and non magnetic ore is roughly selected is 12000 oersteds～13000 oersteds, and the strong selected intensity of magnetic is 10000 oersteds～12000 oersteds, and the intensity that strong magnetic is scanned is 14000 oersteds～15000 oersteds.
Strong magnetic is roughly selected or the strong selected mine tailing aluminium oxide concentrate flushing water water yield of magnetic is 220L/h～450L/h.
A kind of magnetic concentrate reclaims the iron ore concentrate method, be to adopt the anion reverse floatation method that the iron in the magnetic concentrate is reclaimed, magnetic concentrate is behind ore grinding, size mixing with the adjustment agent, with dispersant ore pulp is disperseed, suppress iron mineral with inhibitor, the aluminium in the magnetic concentrate, silicon mineral are carried out flotation removing with collecting agent
1.. the grinding particle size of magnetic concentrate accounts for 84%～99% at-400 orders;
2.. the concentrate floatation concentration is 20%～45%;
3.. magnetic concentrate carries out the reverse flotation first time behind ore grinding, isolated iron ore concentrate is carried out second time reverse flotation again isolate the product iron concentrate and tailings.
Described adjustment agent is a NaOH, or is sodium carbonate; Described dispersant is a waterglass, or is calgon, or is sulfate; Described inhibitor is a starch, and described collecting agent is an oleic acid, or is tall oil, or is collecting agent WHA-3.
Described adjustment agent is a NaOH, and described dispersant is a waterglass, and described collecting agent is collecting agent WHA-3.
The consumption of described adjustment agent NaOH is 450g/t～800g/t, described dispersant waterglass consumption is 150g/t～450g/t, described inhibitor starch consumption is 800g/t～1200g/t, described collecting agent WHA-3 reverse flotation consumption for the first time is 450g/t～900g/t, and the reverse flotation consumption is 150g/t～300g/t for the second time.
Positive beneficial effect of the present invention:
1. high-iron bauxite ferro-aluminum comprehensive utilization of separation method of the present invention adopts high intensity magnetic separation---anion reverse floatation process integration, high-iron bauxite is carried out ore dressing comprehensively reclaim, and therefrom reclaims aluminium concentrate and iron ore concentrate.Through laboratory test and expansion long run test, all obtain promising result, aluminium concentrate grade＞68%, the rate of recovery＞70%, iron concentrate grade＞56%, the rate of recovery＞50%.
2. the present invention utilizes the physical method of magnetic technique to realize the separation of ferro-aluminum in the bauxite, can not produce chemical contamination, and is favourable to the protection environment, and advantages of simple technological process, is easy to control, and has very strong adaptability.
3. iron ore concentrate can be used as iron-smelting raw material, but also making cement factory raw material of the mine tailing after the magnetic separation makes resource obtain the good comprehensive utilization.
4. the present invention has great economic worth to exploitation China high-iron bauxite resource, for bauxite into alumina provides a kind of new technical scheme, has market prospects and bigger development potentiality preferably.
5. the present invention provides a new approach that utilizes to the abundant comprehensive utilization of China's bauxite resource, advocates recycling economy in country, creates under the social form that saves very important meaning is arranged.
Four. description of drawings
Fig. 1: the technological process block-diagram of high-iron bauxite ferro-aluminum comprehensive utilization of separation method
Fig. 2: the technological process block-diagram of high-iron bauxite ferro-aluminum comprehensive utilization of separation method
Fig. 3: the technological process block-diagram of high-iron bauxite ferro-aluminum comprehensive utilization of separation method
Fig. 4: magnetic concentrate reclaims the technological process block-diagram of iron ore concentrate
Five. the specific embodiment:
Embodiment one:
Referring to Fig. 1, with iron content be 19.36%, alumina content is that 55.69% high-iron bauxite becomes 0～25mm granularity through crusher in crushing.The ore particle of above-mentioned granularity is put into ball mill carry out ore grinding, pack into the grader of drum sieve of the bauxite powder that ore grinding is good carries out the classification sub-sieve, the breeze that sifts out to the 0.074mm granularity accounts for 85%, alum clay ore particle greater than the 0.074mm granularity, again ore grinding, in ore grinding, add clear water, make pulp density 20%, the ore pulp that mill is good is pumped into pulp tank by ore pulp, import in the intensity magnetic separator and roughly select (magnetic field intensity is 12000 oersteds), with isolated magnetic mineral roughly select iron ore concentrate and non magnetic ore rougher tailings aluminium oxide concentrate import after by vacuum-type drum filter elimination moisture content intensity magnetic separator carry out respectively strong magnetic selected (magnetic field intensity is 10000 oersteds) and by force magnetic scan (magnetic field intensity is 14000 oersteds), isolate selected iron ore concentrate and scan aluminium concentrate and cleaner tailings and scan mine tailing, the strong selected feed ore concentration of magnetic is 8%, with cleaner tailings, scanning mine tailing returns intensity magnetic separator and carries out magnetic separation once more.The intensity magnetic separator disk running speed is 3r/min, and aluminium oxide concentrate washing water quantity is 220L/h.The high intensity magnetic separation iron ore concentrate is carried out the classification sub-sieve behind ore grinding, sift out to-400 purpose breezes and account for 99%, in ore grinding, add clear water, making floatation concentration is 20%, size mixing with NaOH, the consumption of NaOH is 800g/t, the pH value that makes ore pulp is 11, with dispersant waterglass the thin mud in the ore pulp is disperseed, the waterglass consumption is 150g/t, suppresses iron mineral with inhibitor starch, consumption is 800g/t, with collecting agent WHA-3 to the filter in the magnetic concentrate, iron mineral carries out flotation removing, and the reverse flotation consumption is 450g/t for the first time, and the reverse flotation consumption is 300g/t for the second time.Its separating resulting sees Table 1.
Table 1 high-iron bauxite ferro-aluminum comprehensive utilization of separation result
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| The aluminium concentrate | 55.97 | 6.57 | 72.33 | 2.22 | 18.98 | 72.69 | 50.59 |
| Iron ore concentrate | 18.66 | 56.77 | 5.07 | 2.58 | 54.72 | 1.91 | 19.56 |
| Mine tailing | 25.37 | 20.07 | 55.76 | 2.89 | 26.30 | 25.40 | 29.85 |
| Raw ore | 100.00 | 19.36 | 55.69 | 2.46 | 100.00 | 100.00 | 100.00 |
Embodiment two: to iron content be 20.24%, alumina content is that 52.59% high-iron bauxite carries out high-iron bauxite ferro-aluminum comprehensive utilization of separation, step is basic identical among its concrete operations step and the embodiment one, no longer is described in detail.Difference is: the ore particle of 0.074mm granularity accounts for 68%, it is 35% that strong magnetic is roughly selected feed ore concentration, the strong selected feed ore concentration of magnetic is 10%, it is 13000 oersteds that strong magnetic is roughly selected magnetic field intensity, the strong selected magnetic field intensity of magnetic is 10000 oersteds, it is 15000 oersteds that strong magnetic is scanned magnetic field intensity, and the intensity magnetic separator disk running speed is 2r/min, and aluminium oxide concentrate washing water quantity is 120L/h,-400 purpose breezes account for 84%, floatation concentration is 45%, and the consumption of NaOH is 450g/t, and the waterglass consumption is 300g/t, the starch consumption is 1000g/t, collecting agent WHA-3 reverse flotation consumption for the first time is 450g/t, and the reverse flotation consumption is 260g/t for the second time, and its separating resulting sees Table 2.
Table 2 high-iron bauxite ferro-aluminum comprehensive utilization of separation result
| Name of product | Productive rate | Grade | The rate of recovery | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| The aluminium concentrate | 54.30 | 6.67 | 68.25 | 3.73 | 17.88 | 70.47 | 56.45 |
| Iron ore concentrate | 20.03 | 57.20 | 6.43 | 3.38 | 56.43 | 2.45 | 18.51 |
| Mine tailing | 25.67 | 20.26 | 55.48 | 3.56 | 25.69 | 27.08 | 25.04 |
| Raw ore | 100.00 | 20.24 | 52.59 | 3.65 | 100.00 | 100.00 | 100.00 |
Embodiment three: referring to Fig. 2, to iron content be 20.11%, alumina content is that 53.17% high-iron bauxite carries out high-iron bauxite ferro-aluminum comprehensive utilization of separation, step is basic identical among its concrete operations step and the embodiment one, no longer is described in detail.Difference is: the ore particle of 0.074mm granularity accounts for 60%, it is 28% that strong magnetic is roughly selected feed ore concentration, the strong selected feed ore concentration of magnetic is 15%, it is 12500 oersteds that strong magnetic is roughly selected magnetic field intensity, the strong selected magnetic field intensity of magnetic is 12000 oersteds, it is 14500 oersteds that strong magnetic is scanned magnetic field intensity, the intensity magnetic separator disk running speed is 4r/min, aluminium oxide concentrate washing water quantity is 600L/h,-400 purpose breezes account for 95%, and floatation concentration is 23%, and the consumption of NaOH is 600g/t, the waterglass consumption is 450g/t, the starch consumption is 1200g/t, and collecting agent WHA-3 reverse flotation consumption for the first time is 900g/t, and the reverse flotation consumption is 150g/t for the second time, aluminium concentrate overflow composition is reclaimed, and its separating resulting sees Table 3.
Table 3 high-iron bauxite ferro-aluminum comprehensive utilization of separation result
| Name of product | Productive rate | Grade | The rate of recovery | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| The aluminium concentrate | 52.96 | 6.68 | 71.33 | 2.62 | 17.51 | 70.75 | 54.17 |
| Iron ore concentrate | 18.88 | 57.00 | 5.92 | 2.38 | 53.52 | 2.10 | 17.60 |
| Overflow | 3.92 | 19.47 | 52.67 | 3.17 | 3.80 | 3.89 | 4.88 |
| Mine tailing | 24.44 | 20.71 | 50.60 | 2.44 | 25.17 | 23.26 | 23.35 |
| Raw ore | 100.00 | 20.11 | 53.17 | 2.55 | 100.00 | 100.00 | 100.00 |
Embodiment four: to iron content be 17.28%, alumina content is that 52.88% high-iron bauxite carries out high-iron bauxite ferro-aluminum comprehensive utilization of separation, step is basic identical among its concrete operations step and the embodiment one, no longer is described in detail.Difference is: the ore particle of 0.074mm granularity accounts for 79%, it is 22% that strong magnetic is roughly selected feed ore concentration, the strong selected feed ore concentration of magnetic is 12%, it is 12000 oersteds that strong magnetic is roughly selected magnetic field intensity, the strong selected magnetic field intensity of magnetic is 11000 oersteds, it is 14000 oersteds that strong magnetic is scanned magnetic field intensity, the intensity magnetic separator disk running speed is 4r/min, aluminium oxide concentrate washing water quantity is 450L/h,-400 purpose breezes account for 98%, and floatation concentration is 27%, and the consumption of NaOH is 720g/t, the waterglass consumption is 360g/t, the starch consumption is 1100g/t, and collecting agent WHA-3 reverse flotation consumption for the first time is 600g/t, and the reverse flotation consumption is 200g/t for the second time, aluminium concentrate overflow composition is reclaimed, and its separating resulting sees Table 4.
Table 4 high-iron bauxite ferro-aluminum comprehensive utilization of separation result
| Name of product | Productive rate | Grade | The rate of recovery | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| The aluminium concentrate | 53.32 | 5.78 | 67.45 | 6.94 | 18.83 | 71.84 | 55.81 |
| Iron ore concentrate | 15.77 | 56.10 | 5.25 | 6.60 | 51.47 | 1.57 | 14.78 |
| Overflow | 5.45 | 17.79 | 51.28 | 7.81 | 5.62 | 5.29 | 6.08 |
| Mine tailing | 22.45 | 18.92 | 50.18 | 7.25 | 24.08 | 21.30 | 23.23 |
| Raw ore | 100.00 | 17.28 | 52.88 | 7.00 | 100.00 | 100.00 | 100.00 |
Embodiment five: to iron content be 16.31%, alumina content is that 51.23% high-iron bauxite carries out the high intensity magnetic separation ferro-aluminum and separates.High-iron bauxite is become 0～25mm granularity through crusher in crushing.The ore particle of above-mentioned granularity is put into ball mill carry out ore grinding, pack into the grader of drum sieve of the bauxite powder that ore grinding is good carries out the classification sub-sieve, the breeze that sifts out to the 0.074mm granularity accounts for 71%, alum clay ore particle greater than the 0.074mm granularity, again ore grinding, in ore grinding, add clear water, make pulp density 28%, the ore pulp that mill is good is pumped into pulp tank by ore pulp, import in the intensity magnetic separator and roughly select (magnetic field intensity is 12000 oersteds), with isolated magnetic mineral roughly select iron ore concentrate and non magnetic ore rougher tailings aluminium oxide concentrate import after by vacuum-type drum filter elimination moisture content intensity magnetic separator carry out respectively strong magnetic selected (magnetic field intensity is 10000 oersteds) and by force magnetic scan (magnetic field intensity is 14000 oersteds), isolate selected iron ore concentrate and scan aluminium concentrate and cleaner tailings and scan mine tailing, with cleaner tailings with scan mine tailing and abandon.The strong selected feed ore concentration of magnetic is 10%, and the intensity magnetic separator disk running speed is 3r/min, and aluminium oxide concentrate washing water quantity is 360L/h.
Table 5 high-iron bauxite high intensity magnetic separation separating resulting
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 33.06 | 39.80 | 28.47 | 2.56 | 68.11 | 17.75 | 34.25 |
| Cleaner tailings | 15.41 | 12.91 | 60.85 | 2.38 | 10.30 | 17.68 | 14.84 |
| Scan mine tailing | 15.61 | 13.32 | 60.47 | 2.58 | 10.69 | 17.80 | 16.30 |
| The aluminium concentrate | 35.92 | 5.86 | 69.05 | 2.38 | 10.90 | 46.77 | 34.60 |
| Give the ore deposit | 100.00 | 19.31 | 53.03 | 2.47 | 100.00 | 100.00 | 100.00 |
Embodiment six: to iron content be 17.21%, alumina content is that 53.75% high-iron bauxite carries out the high intensity magnetic separation ferro-aluminum and separates, step is basic identical among its concrete operations step and the embodiment five, no longer is described in detail.Difference is: the ore particle of 0.074mm granularity accounts for 85%, it is 35% that strong magnetic is roughly selected feed ore concentration, the strong selected feed ore concentration of magnetic is 8%, it is 12500 oersteds that strong magnetic is roughly selected magnetic field intensity, the strong selected magnetic field intensity of magnetic is 12000 oersteds, and it is 15000 oersteds that strong magnetic is scanned magnetic field intensity, and the intensity magnetic separator disk running speed is 4r/min, aluminium oxide concentrate washing water quantity is 450L/h, and the ferro-aluminum separating resulting sees Table 6.
Table 6 high-iron bauxite high intensity magnetic separation separating resulting
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 29.25 | 36.14 | 31.22 | 4.91 | 61.42 | 16.99 | 19.79 |
| Cleaner tailings | 15.16 | 11.83 | 59.07 | 8.56 | 10.42 | 16.66 | 17.89 |
| Scan mine tailing | 13.01 | 18.25 | 58.55 | 6.87 | 13.79 | 14.17 | 12.32 |
| The aluminium concentrate | 42.58 | 5.81 | 65.87 | 8.52 | 14.37 | 52.18 | 50.00 |
| Give the ore deposit | 100.00 | 17.21 | 53.75 | 7.26 | 100.00 | 100.00 | 100.00 |
Embodiment seven: to iron content be 19.36%, alumina content is that 555.69% high-iron bauxite carries out the high intensity magnetic separation ferro-aluminum and separates, step is basic identical among its concrete operations step and the embodiment five, no longer is described in detail.Difference is: the ore particle of 0.074mm granularity accounts for 72%, it is 28% that strong magnetic is roughly selected feed ore concentration, the strong selected feed ore concentration of magnetic is 10%, it is 13000 oersteds that strong magnetic is roughly selected magnetic field intensity, the strong selected magnetic field intensity of magnetic is 121000 oersteds, it is 15000 oersteds that strong magnetic is scanned magnetic field intensity, and the intensity magnetic separator disk running speed is 2r/min, and aluminium oxide concentrate washing water quantity is 600L/h.With cleaner tailings with scan mine tailing and return strong magnetic separator and select, the ferro-aluminum separating resulting sees Table 7.
Table 7 high-iron bauxite high intensity magnetic separation separating resulting
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 44.03 | 35.63 | 34.53 | 2.76 | 81.02 | 27.31 | 49.41 |
| The aluminium concentrate | 55.97 | 6.57 | 72.33 | 2.22 | 18.98 | 72.69 | 50.59 |
| Give the ore deposit | 100.00 | 19.36 | 55.69 | 2.46 | 100.00 | 100.00 | 100.00 |
Embodiment eight: referring to Fig. 4, with iron content is 35.79%, alumina content is that 34.09% high intensity magnetic separation iron ore concentrate carries out the classification sub-sieve behind ore grinding, sift out to-400 purpose breezes and account for 99%, in ore grinding, add clear water, making floatation concentration is 45%, size mixing with NaOH, the consumption of NaOH is 800g/t, with dispersant waterglass the thin mud in the ore pulp is disperseed, the waterglass consumption is 150g/t, suppress iron mineral with inhibitor starch, consumption is 1000g/t, uses collecting agent WHA-3 to the filter in the magnetic concentrate, iron mineral carries out flotation removing, and the reverse flotation consumption is 550g/t for the first time, the reverse flotation consumption is 300g/t for the second time, and the magnetic concentrate reverse flotation is received iron and be the results are shown in Table 8.
Table 8 magnetic concentrate reverse flotation is received the iron result
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 42.37 | 57.06 | 5.64 | 2.42 | 67.54 | 7.01 | 39.58 |
| Mine tailing | 57.63 | 20.16 | 55.01 | 2.72 | 32.46 | 92.99 | 60.42 |
| Magnetic concentrate | 100.00 | 35.79 | 34.09 | 2.59 | 100.00 | 100.00 | 100.00 |
Embodiment nine: to iron content be 36.19%, alumina content is that 33.43% high intensity magnetic separation iron ore concentrate carries out the classification sub-sieve behind ore grinding, step is basic identical among its concrete operations step and the embodiment eight, no longer is described in detail.Difference is :-400 purpose breezes account for 96%, floatation concentration is 20%, the consumption of NaOH is 450g/t, the waterglass consumption is 450g/t, the starch consumption is 1200g/t, collecting agent WHA-3 reverse flotation consumption for the first time is 900g/t, and the reverse flotation consumption is 150g/t for the second time, and its separating resulting sees Table 9.
Table 9 magnetic concentrate reverse flotation is received the iron result
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 43.83 | 56.74 | 6.31 | 3.08 | 68.72 | 8.28 | 38.82 |
| Mine tailing | 56.17 | 20.16 | 54.59 | 3.79 | 31.28 | 91.72 | 61.18 |
| Magnetic concentrate | 100.00 | 36.19 | 33.43 | 3.48 | 100.00 | 100.00 | 100.00 |
Embodiment ten: to iron content be 36.52%, alumina content is that 31.12% high intensity magnetic separation iron ore concentrate carries out the classification sub-sieve behind ore grinding, step is basic identical among its concrete operations step and the embodiment eight, no longer is described in detail.Difference is :-400 purpose breezes account for 95%, floatation concentration is 32%, the consumption of NaOH is 450g/t, the waterglass consumption is 450g/t, the starch consumption is 1200g/t, collecting agent WHA-3 reverse flotation consumption for the first time is 700g/t, and the reverse flotation consumption is 250g/t for the second time, and its separating resulting sees Table 10.
Table 10 magnetic concentrate reverse flotation is received the iron result
| Name of product | Productive rate (%) | Grade (%) | The rate of recovery (%) | ||||
| Fe | Al 2O 3 | SiO 2 | Fe | Al 2O 3 | SiO 2 | ||
| Iron ore concentrate | 43.58 | 57.00 | 5.92 | 2.29 | 68.02 | 8.29 | 41.67 |
| Mine tailing | 56.42 | 20.71 | 50.59 | 2.47 | 31.98 | 91.71 | 58.33 |
| Magnetic concentrate | 100.00 | 36.52 | 31.12 | 2.40 | 100.00 | 100.00 | 100.00 |
Claims (10)
1. high-iron bauxite ferro-aluminum comprehensive utilization of separation method, comprise that high-iron bauxite high intensity magnetic separation ferro-aluminum separates and magnetic concentrate reclaims iron ore concentrate, adopt disintegrating machine with ore reduction to 0～25mm granularity, use grinding attachment levigate again, select granularity by grader and account for 60%～85% ore particle for-0.074mm, thicker particle returns grinding attachment fine grinding again, with water is pumped (conveying) medium, ore pulp is imported strong magnetic separator, roughly select by strong magnetic, strong magnetic is selected, the flow process that strong magnetic is scanned, iron oxide magnetic mineral in the ore pulp are separated with the aluminium oxide non magnetic ore, adopt the anion reverse floatation method that the iron in the magnetic concentrate is reclaimed, magnetic concentrate is behind ore grinding, size mixing with the adjustment agent, ore pulp is disperseed, suppress iron mineral with inhibitor with dispersant, with collecting agent to the aluminium in the magnetic concentrate, silicon mineral carries out flotation removing, it is characterized in that:
(1). the iron oxide content of high-iron bauxite 〉=10%, alumina content 〉=40%;
(2). the feed ore concentration that the strong magnetic of high-iron bauxite is roughly selected is 20%～35%; The strong selected feed ore concentration of magnetic is 8%～15%;
(3). the intensity of separating the strong magnetic separator of magnetic mineral and non magnetic ore is 8000 oersteds～16000 oersteds;
(4). ore pulp is roughly selected through strong magnetic separator, isolates magnetic mineral and roughly selects concentrate iron ore concentrate and non magnetic ore rougher tailings aluminium concentrate; It is selected through strong magnetic separator to roughly select iron ore concentrate, isolates selected iron ore concentrate and cleaner tailings; Rougher tailings aluminium concentrate is scanned through strong magnetic separator, isolated and scan mine tailing and scan the aluminium concentrate; To scan the desliming of aluminium concentrate and obtain product aluminium oxide concentrate;
(5). with the iron oxide magnetic ore pulp, or the non magnetic ore pulp of aluminium oxide carries out water by vacuum filter and separates with iron oxide or aluminium oxide solid phase, obtains the oxygen enrichment iron ore concentrate respectively, or rich aluminium oxide concentrate;
(6). the grinding particle size of magnetic concentrate accounts for 84%～99% at-400 orders;
(7). the concentrate floatation concentration is 20%～45%;
(8). magnetic concentrate carries out the reverse flotation first time behind ore grinding, isolated iron ore concentrate is carried out second time reverse flotation again isolate the product iron concentrate and tailings;
(9). product aluminium concentrate grade＞68%, the rate of recovery＞70%, iron concentrate grade＞55%, the rate of recovery＞50%.
2. high-iron bauxite ferro-aluminum comprehensive utilization of separation method according to claim 1 is characterized in that: select granularity by grader and account for 68%～79% ore particle for-0.074mm.
3. high-iron bauxite ferro-aluminum comprehensive utilization of separation method according to claim 1 is characterized in that: the feed ore concentration that strong magnetic is roughly selected is 22%～28%.
4. high-iron bauxite ferro-aluminum comprehensive utilization of separation method according to claim 1 is characterized in that: with cleaner tailings or scan mine tailing and return strong magnetic separator and carry out magnetic separation once more.
5. high-iron bauxite ferro-aluminum comprehensive utilization of separation method according to claim 1, it is characterized in that: the intensity that the strong magnetic of separation magnetic mineral and non magnetic ore is roughly selected is 12000 oersteds～13000 oersteds, the strong selected intensity of magnetic is 10000 oersteds～12000 oersteds, and the intensity that strong magnetic is scanned is 14000 oersteds～15000 oersteds.
6. high-iron bauxite ferro-aluminum comprehensive utilization of separation method according to claim 1 is characterized in that: strong magnetic is roughly selected or the strong selected mine tailing aluminium oxide concentrate flushing water water yield of magnetic is 220L/h～450L/h.
7. a magnetic concentrate reclaims the iron ore concentrate method, be to adopt the anion reverse floatation method that the iron in the magnetic concentrate is reclaimed, magnetic concentrate is behind ore grinding, size mixing with the adjustment agent, with dispersant ore pulp is disperseed, suppress iron mineral with inhibitor, the aluminium in the magnetic concentrate, silicon mineral carried out flotation removing, it is characterized in that with collecting agent:
1.. the grinding particle size of magnetic concentrate accounts for 84%～99% at-400 orders;
2.. the concentrate floatation concentration is 20%～45%;
3.. magnetic concentrate carries out the reverse flotation first time behind ore grinding, isolated iron ore concentrate is carried out second time reverse flotation again isolate the product iron concentrate and tailings.
8. magnetic concentrate according to claim 7 reclaims the iron ore concentrate method, it is characterized in that:
Described adjustment agent is a NaOH, or is sodium carbonate; Described dispersant is a waterglass, or is calgon, or is sulfate; Described inhibitor is a starch, and described collecting agent is an oleic acid, or is tall oil, or is collecting agent WHA-3.
9. magnetic concentrate according to claim 8 reclaims the iron ore concentrate method, and it is characterized in that: described adjustment agent is a NaOH, and described dispersant is a waterglass, and described collecting agent is collecting agent WHA-3.
10. magnetic concentrate according to claim 9 reclaims the iron ore concentrate method, it is characterized in that: the consumption of described adjustment agent NaOH is 450g/t～800g/t, described dispersant waterglass consumption is 150g/t～450g/t, described inhibitor starch consumption is 800g/t～1200g/t, described collecting agent WHA-3 reverse flotation consumption for the first time is 450g/t～900g/t, and the reverse flotation consumption is 150g/t～300g/t for the second time.
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