CN101417261B - Bayer process red mud processing method - Google Patents
Bayer process red mud processing method Download PDFInfo
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- CN101417261B CN101417261B CN2008102270809A CN200810227080A CN101417261B CN 101417261 B CN101417261 B CN 101417261B CN 2008102270809 A CN2008102270809 A CN 2008102270809A CN 200810227080 A CN200810227080 A CN 200810227080A CN 101417261 B CN101417261 B CN 101417261B
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- 238000003672 processing method Methods 0.000 title claims description 41
- 238000004131 Bayer process Methods 0.000 title claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 120
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 96
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000004576 sand Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000002002 slurry Substances 0.000 claims abstract description 42
- 238000007885 magnetic separation Methods 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000000227 grinding Methods 0.000 claims abstract description 19
- 239000006148 magnetic separator Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims description 49
- 238000004062 sedimentation Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 10
- 235000013312 flour Nutrition 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 8
- 239000012190 activator Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- -1 hydroxyl oximes Chemical class 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 239000010453 quartz Substances 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 239000004570 mortar (masonry) Substances 0.000 abstract 2
- 238000003801 milling Methods 0.000 abstract 1
- 229910001570 bauxite Inorganic materials 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 229910052663 cancrinite Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical group O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a treatment method of Bayer method red mud, comprising the following steps: (a) the red mud is sorted by a beneficiation method and divided into three parts, namely, rough sand, fine sand and soil mortar; (b) milling grinding and settling separation are carried out to the rough sand in the step (a) to obtain rough sand one and tailing ore slurry one; (c) after the rough sand one in the step (b) and the fine sand in the step (a) are mixed, magnetic separation is carried out to obtain iron powder and quartz powder; (d) the iron powder obtained in the step (c) is refined and sorted by a magnetic separator to obtain fine iron powder F and fine iron powder P; and (e) the soil mortar in step (a) is pulse magnetic separated to obtain tailing ore slurry and fine iron powder PI. The method can reduce 35-40 percent of red mud discharge, the iron element effective utilization rate can reach more than 70 percent, and the monomer quartz extraction yield can reach 80 percent. The method optimizes the production flow of alumina by using a combination method, reduces the red mud discharge, protects the environment, reduces the production cost of alumina and improves the alumina production capacity.
Description
Technical field
The present invention relates to the processing method of red mud in a kind of alumina producing, particularly relate to a kind of processing method of Bayer process red mud.
Background technology
Red mud is to refine the discarded object that produces in the alumina process with bauxite, because of it is gained the name for crimson look muddy.Along with the continuous development of alum clay industry, be more than 1,500 ten thousand tons red mud discharge capacity every year of China, and along with new operation and old equipment volume increase transformation, the red mud total amount has the trend of rising.The most of alumina producers in countries in the world are that red mud is piled up or the impouring deep-sea, depositing of red mud not only takies a large amount of soils and farmland, expends more stockyard construction and maintenance cost, and the residue alkali lye that is present in the red mud will cause underground water pollution to underground infiltration.In addition, the dust that the red mud in stockyard forms flies upward everywhere, and broken ring ecological environment causes severe contamination.The current society of be becoming tight in land resource day, environmental protection is increasingly important, oneself becomes one of focus that people pay close attention to the comprehensive regulation of red mud.Red mud is the maximum discarded object that produces in the aluminum oxide production process, also is the greatest contamination source of alumina producing.Because production method and bauxite grade is different, the aluminium oxide that every production is a ton approximately will produce 0.5～2.5 ton red mud, and red mud per ton also attaches 3～4m
3Alkali waste.
Red mud is according to the difference of alumina-producing method, can be divided into three kinds of sintering process, Bayer process and combination method red muds, because the content abundance difference of bauxite, the method taked of alumina producing is also different both at home and abroad.Bayer process output accounts for more than 90% of Gross World Product.What Bayer process production was adopted is highly basic NaOH stripping high alumina, high-iron bauxite, aluminium oxide, iron oxide, alkali content height in the red mud of generation; What handle is boehmite type and gibbsitic bauxite.What sintering process and combination method were handled is the high silicon of indissoluble, low iron, diaspore type, kaolinite type bauxite, the red mud CaO content height of generation, and alkali and iron content are lower.The main component of Bayer process red mud is bloodstone, sodium aluminosilicate hydrate, cancrinite etc.
A large amount of research has all been done by the former Soviet Union, Japan, the U.S., Germany etc. aspect the recovery of metallic iron in red mud, though the time of foreign study all relatively early, mostly is the 60-80 age, a large amount of practical applications is not arranged yet now.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of processing method of Bayer process red mud; after handling, this method can reduce red mud discharge capacity 35%-40%; optimized the flow process that combination method is produced aluminium oxide; reduced the outer discharge capacity of red mud; protected environment; reduce alumina production cost, promoted the alumina producing ability.
For solving the problems of the technologies described above, the invention provides a kind of processing method of Bayer process red mud, it comprises the steps:
A adopts the mode of ore dressing to carry out sorting in red mud slurry, is divided into coarse sand, fine sand, silt particle and starches three parts;
B carries out ore grinding with the coarse sand among the step a, and sedimentation separation is handled, and obtains coarse sand I and mine tailing slurry I;
C with after fine sand among the step a mixes, carries out high strength magnetic separation separation ore-sorting with the coarse sand I among the step b, obtains iron powder and silica flour;
D obtains smart powder F of rich ore iron and the smart powder P of common iron with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains among the step c, and wherein, all iron content of rich ore iron essence powder F is greater than 65% weight;
E obtains the magnetic separation of the slurry of the silt particle among step a process pulsed high-gradient high strength in the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content.
The processing method of above-mentioned Bayer process red mud, wherein, the ore dressing mode that adopts among the described step a is the separation by shaking table mode, the cross fall of the bed surface of shaking table is less than 6 degree, greater than 1 degree, the concentration of red mud slurry is less than 30% weight (be the solid content of red mud slurry, red mud accounts for the weight percentage of red mud slurry).
The processing method of above-mentioned Bayer process red mud, wherein, the ore dressing mode that adopts among the described step a is the screening sorting, and the one-level screen cloth is 30～80 orders in the screening, is preferably 50 orders, and the secondary screen cloth is 120～220 orders, is preferably 160～200 orders.
The processing method of above-mentioned Bayer process red mud, wherein, the granularity with the broken ore grinding of coarse sand among the described step b is 80～220 orders, is preferably 160～220 orders.
The processing method of above-mentioned Bayer process red mud, wherein, behind the described step b medium coarse sand ore grinding, in the sedimentation separation process, the concentration of ore pulp is 1～40% weight (be the solid content of ore pulp, ore in sand form accounts for the weight percentage of pulp slurry), be preferably 5～20% weight, after complete sedimentation separation, overflow is mine tailing slurry I, and underflow obtains coarse sand I through the press filtration separation.
The processing method of above-mentioned Bayer process red mud, wherein, in the sedimentation separation process, can add assistant activator among the described step b, addition is less than 0.1% of ore pulp weight, used assistant activator is different hydroxyl oximes high polymer coagulant or anion-polyacrylamide, is preferably anion-polyacrylamide.
The processing method of above-mentioned Bayer process red mud, wherein, when described step c medium coarse sand I and fine sand mixed and carry out magnetic separation and separate, magnetic field intensity was 8000-16000GS, is preferably 10000-14000GS.
The processing method of above-mentioned Bayer process red mud, wherein, when in the described steps d iron powder that obtains among the step c being carried out the refining sorting of low intensity magnetic separation machine, magnetic field intensity is 500-8000GS, is preferably 2000-5000GS, obtains the smart powder P of smart powder F of rich ore iron and common iron.
The processing method of above-mentioned Bayer process red mud, wherein, the magnetic field intensity of magnetic separation is 10000-16000GS among the described step e, and pulse number is 20-300 time/min, and stroke is 5-25mm.
The processing method of above-mentioned Bayer process red mud, wherein, during the magnetic separation of silt particle slurry part process pulsed high-gradient high strength, the magnetic field intensity of selecting is 10000-16000GS, is preferably 11000-14000GS, and pulse number is 20-300 time/min, preferred 90-160 time/min, stroke: 5-25mm is preferably 10-20mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content.
The processing method of above-mentioned Bayer process red mud, wherein, mine tailing slurry I among the described step b and the mine tailing slurry among the described step e are directly delivered to sintering process and are produced aluminium oxide, form combination method and produce the aluminium oxide flow process.
The processing method of Bayer process red mud of the present invention has following beneficial effect:
1, can reduce red mud discharge capacity 35%-40% after the processing.By the integrated treatment of Bayer process red mud having been optimized the flow process that combination method is produced aluminium oxide, reduce the outer discharge capacity of red mud like this, protected environment, reduced alumina production cost, promoted the alumina producing ability.
2, the processing method of Bayer process red mud of the present invention is divided into four parts with red mud, and the mine tailing part is carried out sintering process batching, minimumization of as far as possible accomplishing iron content as deoxidation aluminium manufacturer.The smart powder all iron content of P series iron is lower than 65, can be used as ironmaking, the common iron ore use of iron-foundry, and the smart powder of F series iron can be used as large-scale iron-smelter rich ore and joins ore deposit ironmaking, and the silica flour part can be sold.For enterprise creates profit.
3, technical parameter ratio of the present invention is easier to control, and the ferro element effective rate of utilization can reach more than 70%, the quartzy extraction rate reached to 80% of monomer.
4, method of the present invention adopts segmentation control, and different materials has different gravity characteristics and magnetic separation characteristic, can utilize the adjustable of technology, controls the selected of mine tailing and concentrate, and serialization production that can realization flow, utilizes red mud to greatest extent.
5, the present invention has realized reducing the iron content that returns red mud in the sintering process batching, has also finished the preparation of sorting iron ore concentrate in the red mud.
6, production cost of the present invention is low because the primary product smart powder that is iron and quartzy, its market capacity is big, it is convenient to utilize, and has established the application of this technology.
7, the present invention handles red mud amount and strengthens greatly, has not only alleviated the non-productive work of magnetic separator, has improved the operating efficiency of magnetic separator, and has improved the workload of magnetic separator, has reduced the magnetic separation cost, year handles a red mud amount can reach more than 100 ten thousand tons.
8, be expected to make China's alumina by sintering production capacity to increase more than 20%, and reduce energy consumption and production costs significantly, and can make sintering system realize energy-conservation significantly and consumption reduction, this helps bringing into play to greatest extent the production capacity of sintering process and Bayer process two big systems, optimizes production procedure.
9, the present invention is owing to divide two-way to carry out, produce four partial material such as mine tailing, quartz, concentrate, in the production design, can not bring the flow process stopping state, be beneficial to artificial execute-in-place, adopt the water saving flow process simultaneously, lowered the water pressure of using of magnetic separation, also reduced the magnetic separation cost simultaneously.
The specific embodiment
Describe the present invention in detail below in conjunction with embodiment.
Embodiment 1
(1) with the red mud of concentration 25% slurry, adopt separation by shaking table Bayer process red mud slurry, cross fall 5 degree of bed surface obtain coarse sand, fine sand, silt particle and starch three parts;
(2) coarse sand partial crushing ore grinding, the control granularity is 180 orders, carry out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 15% weight (being the weight percentage that ore in sand form accounts for ore pulp), add the assistant activator anion-polyacrylamide, addition is 0.05% of an ore pulp weight, after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 12000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 4000GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 12500GS, and pulse number is 150 times/min, and stroke is 18mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Embodiment 2
(1) with the red mud of concentration 22% slurry, adopt separation by shaking table Bayer process red mud slurry, cross fall 2 degree of bed surface obtain coarse sand, fine sand, silt particle and starch three parts;
(2) coarse sand partial crushing ore grinding, the control granularity is 80 orders, carries out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 40% weight (being the weight percentage that ore in sand form accounts for ore pulp), after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 14000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 2000GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 10000GS, and pulse number is 90 times/min, and stroke is 10mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Embodiment 3
(1) with the red mud of concentration 20% slurry, adopt the mode of screening to carry out sorting, the screen cloth of one-level high frequency sieve is 30 orders, the screen cloth of secondary high frequency sieve is 160 orders, obtains coarse sand, fine sand, silt particle and starches three parts.
(2) coarse sand partial crushing ore grinding, the control granularity is 220 orders, carry out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 1% weight (being the weight percentage that ore in sand form accounts for ore pulp), add the different hydroxyl oximes of assistant activator high polymer coagulant, addition is 0.08% of an ore pulp weight, after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 8000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 5000GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 14000GS, and pulse number is 300 times/min, and stroke is 20mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Embodiment 4
(1) with the red mud of concentration 21% slurry, adopt the mode of screening to carry out sorting, the screen cloth of one-level high frequency sieve is 50 orders, the screen cloth of secondary high frequency sieve is 120 orders, obtains coarse sand, fine sand, silt particle and starches three parts.
(2) coarse sand partial crushing ore grinding, the control granularity is 160 orders, carry out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 20% weight (being the weight percentage that ore in sand form accounts for ore pulp), add the assistant activator anion-polyacrylamide, addition is 0.05% of an ore pulp weight, after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 16000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 8000GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 16000GS, and pulse number is 160 times/min, and stroke is 25mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Embodiment 5
(1) with the red mud of concentration 25% slurry, adopt the mode of screening to carry out sorting, the screen cloth of one-level high frequency sieve is 60 orders, the screen cloth of secondary high frequency sieve is 200 orders, obtains coarse sand, fine sand, silt particle and starches three parts.
(2) coarse sand partial crushing ore grinding, the control granularity is 200 orders, carries out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 25% weight (being the weight percentage that ore in sand form accounts for ore pulp), after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 10000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 500GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 11000GS, and pulse number is 20 times/min, and stroke is 5mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Embodiment 6
(1) with the red mud of concentration 27% slurry, adopt the mode of screening to carry out sorting, the screen cloth of one-level high frequency sieve is 80 orders, the screen cloth of secondary high frequency sieve is 220 orders, obtains coarse sand, fine sand, silt particle and starches three parts.
(2) coarse sand partial crushing ore grinding, the control granularity is 180 orders, carry out sedimentation separation behind the coarse sand ore grinding, the solution concentration of control ore in sand form is 5% weight (being the weight percentage that ore in sand form accounts for ore pulp), add the assistant activator anion-polyacrylamide, addition is 0.06% of an ore pulp weight, after complete sedimentation separation, overflow is mine tailing I, and underflow obtains coarse sand I through the press filtration separation;
(3) coarse sand I and fine sand are mixed, carry out the high strength magnetic separation and separate, magnetic field intensity is controlled at 12000GS, obtains iron powder and silica flour;
(4) with the refining sorting through the low intensity magnetic separation machine of the iron powder that obtains in (3), magnetic field intensity is controlled at 3000GS, obtains smart powder F of rich ore iron and common iron essence powder P;
(5) slurry of the silt particle in (1) part is carried out the magnetic separation of pulsed high-gradient high strength, magnetic field intensity is 12000GS, and pulse number is 120 times/min, and stroke is 10mm, obtains the mine tailing slurry and the smart powder PI of iron of the high A/S of low iron content;
(6) mine tailing and mine tailing I are directly delivered to sintering process production aluminium oxide, form combination method and produce the aluminium oxide flow process.
Claims (23)
1. the processing method of a Bayer process red mud, it comprises the steps:
A adopts the mode of ore dressing to carry out sorting in red mud slurry, is divided into coarse sand, fine sand, silt particle and starches three parts;
B carries out ore grinding with the coarse sand among the step a, and sedimentation separation obtains coarse sand I and mine tailing slurry I;
C with after fine sand among the step a mixes, carries out the magnetic separation separation ore-sorting with the coarse sand I among the step b, obtains iron powder and silica flour;
D obtains smart powder F of iron and iron essence powder P with the refining sorting through magnetic separator of the iron powder that obtains among the step c;
E obtains mine tailing slurry and the smart powder PI of iron with the slurry of the silt particle among the step a through the pulse magnetic separation.
2. processing method as claimed in claim 1, wherein, the ore dressing mode that adopts among the described step a is the separation by shaking table mode.
3. processing method as claimed in claim 2, wherein, the cross fall of the bed surface of described shaking table is less than 6 degree, greater than 1 degree.
4. as claim 2 or 3 described processing methods, wherein, the concentration of the red mud slurry among the described step a is less than 30% weight.
5. processing method as claimed in claim 1, wherein, the ore dressing mode that adopts among the described step a is the screening sorting.
6. processing method as claimed in claim 5, wherein, the one-level screen cloth is 30～80 orders in the described screening.
7. processing method as claimed in claim 6, wherein, described one-level screen cloth is 50 orders.
8. processing method as claimed in claim 5, wherein, the secondary screen cloth is 120～220 orders in the described screening.
9. processing method as claimed in claim 8, wherein, the secondary screen cloth is 160～200 orders in the described screening.
10. processing method as claimed in claim 1, wherein, the granularity with the broken ore grinding of coarse sand among the described step b is 80～220 orders.
11. processing method as claimed in claim 10, wherein, the granularity with the broken ore grinding of coarse sand among the described step b is 160～220 orders.
12. processing method as claimed in claim 1, wherein, in the sedimentation separation process, the concentration of ore pulp is 1～40% weight among the described step b.
13. processing method as claimed in claim 12, wherein, in the sedimentation separation process, the concentration of ore pulp is 5～20% weight among the described step b.
14. processing method as claimed in claim 1, wherein, after sedimentation separation, overflow is mine tailing slurry I among the described step b, and underflow obtains coarse sand I through the press filtration separation.
15. processing method as claimed in claim 1 wherein, adds assistant activator among the described step b in the sedimentation separation process, addition is less than 0.1% of ore pulp weight.
16. processing method as claimed in claim 15, wherein, described assistant activator is different hydroxyl oximes high polymer coagulant or anion-polyacrylamide.
17. processing method as claimed in claim 1, wherein, the magnetic field intensity that magnetic separation separates among the described step c is 8000-16000GS.
18. processing method as claimed in claim 17, wherein, the magnetic field intensity that magnetic separation separates among the described step c is 10000-14000GS.
19. processing method as claimed in claim 1, wherein, the magnetic field intensity that magnetic separator adopts in the described steps d is 500-8000GS.
20. processing method as claimed in claim 19, wherein, the magnetic field intensity that magnetic separator adopts in the described steps d is 2000-5000GS.
21. processing method as claimed in claim 1, wherein, the magnetic field intensity of magnetic separation is 10000-16000GS among the described step e, and pulse number is 20-300 time/min, and stroke is 5-25mm.
22. processing method as claimed in claim 21, wherein, the magnetic field intensity of magnetic separation is 11000-14000GS among the described step e, and pulse number is 90-160 time/min, and stroke is 10-20mm.
23. processing method as claimed in claim 1, wherein, mine tailing slurry I among the described step b and the mine tailing slurry among the described step e are directly delivered to sintering process and are produced aluminium oxide.
Priority Applications (1)
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| CN101875499A (en) * | 2010-06-10 | 2010-11-03 | 中国铝业股份有限公司 | Non-waste-residue production process for bauxite |
| CN101831520B (en) * | 2010-06-10 | 2011-07-20 | 中国铝业股份有限公司 | Method for producing sponge iron co-production with sodium aluminate solution by using Bayer process red mud |
| CN101912814B (en) * | 2010-08-09 | 2013-01-23 | 中国铝业股份有限公司 | Method for magnetic separation of iron ore concentrate in red mud slurry in alumina production flow by Bayer process |
| CN102527495B (en) * | 2010-12-22 | 2014-04-16 | 佛冈县山深陶瓷原料有限公司 | Mineral separation process for non-metal ore |
| CN102295396B (en) * | 2011-06-20 | 2013-03-06 | 中国铝业股份有限公司 | Reprocessing and comprehensive utilization method of red mud |
| CN107107070B (en) * | 2014-09-03 | 2020-01-21 | 索理思科技公司 | Method for wet grinding and flocculating mineral ores |
| CN104759345A (en) * | 2014-12-09 | 2015-07-08 | 广西冶金研究院 | Method for extracting iron ore concentrate from red mud at normal temperature |
| CN105327773B (en) * | 2015-11-26 | 2018-01-30 | 四川南江新兴矿业有限公司 | The method for reclaiming nepheline ore deposit in nepheline ore deposit mine tailing |
| CN114192099B (en) * | 2021-11-29 | 2023-03-03 | 山东大学 | Reaction furnace, red mud and sludge-based environment restoration agent prepared by reaction furnace, and preparation method and application thereof |
| CN114887759B (en) * | 2022-04-01 | 2023-08-22 | 中铝山东有限公司 | Method for separating iron powder from red mud by Bayer process |
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