CN1593775A - Method for magnetic separating of aluminum and iron in high iron bauxite - Google Patents
Method for magnetic separating of aluminum and iron in high iron bauxite Download PDFInfo
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- CN1593775A CN1593775A CN 200410010400 CN200410010400A CN1593775A CN 1593775 A CN1593775 A CN 1593775A CN 200410010400 CN200410010400 CN 200410010400 CN 200410010400 A CN200410010400 A CN 200410010400A CN 1593775 A CN1593775 A CN 1593775A
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- magnetic separator
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 104
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 98
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 47
- 229910052782 aluminium Inorganic materials 0.000 title claims description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 33
- 239000012141 concentrate Substances 0.000 claims abstract description 108
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000007885 magnetic separation Methods 0.000 claims abstract description 87
- 239000000428 dust Substances 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 36
- 238000000227 grinding Methods 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001868 water Inorganic materials 0.000 claims abstract description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 239000011707 mineral Substances 0.000 claims abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 252
- 239000006148 magnetic separator Substances 0.000 claims description 154
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 70
- 229910052760 oxygen Inorganic materials 0.000 claims description 70
- 239000001301 oxygen Substances 0.000 claims description 70
- 230000008676 import Effects 0.000 claims description 22
- 230000005307 ferromagnetism Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 238000005191 phase separation Methods 0.000 claims description 2
- 239000007790 solid phase Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 10
- 239000004568 cement Substances 0.000 abstract description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 5
- 238000011109 contamination Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000053 physical method Methods 0.000 abstract description 2
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 abstract 3
- 239000011362 coarse particle Substances 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 238000004513 sizing Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 12
- 239000004411 aluminium Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000003570 air Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000004131 Bayer process Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910001710 laterite Inorganic materials 0.000 description 1
- 239000011504 laterite Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The invention relates to a kind of aluminum-iron separating method in the bauxite, especially involves in an aluminum-iron magnetic separation method in the iron rich bauxite. Break the ore into 0~25mm granularity with breaker, and then make it have fine grinding with ore-grinding device; then select the ore particle with sizing machine, which contains 50~85% ore particle with -0.074mm granularity; put the coarse particles into the ore-grinding device in order to have fine grinding again; with the delivery medium of water or air, lead ore pulp or breeze flow into the magnetic separation device for magnetic separating; after, filtrate the ore pulp or breeze flow of the iron oxide magnetic material or aluminum oxide nonmagnetic material, in order to make water and iron oxide or aluminum oxide separate each other, and it also can precipitate dust to make the air separate with iron oxide or aluminum oxide; then acquire the iron oxide rich concentrate and the aluminum oxide rich concentrate. By using the physical method of magnetic technology, the invention realizes the aluminum-iron separation in the iron rich bauxite, and has no chemical contamination. The mineral tailings by magnetic separation can be used as stock in cement plant, so the invention has no waste substance and offers a new utilization way for sufficient and comprehensive utilization of bauxite resource in our country.
Description
One. technical field: the present invention relates to the method that ferro-aluminum separates in a kind of bauxite, particularly relate to the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite.
Two. background technology: the higher bauxite of a class iron-holder is arranged in China's bauxite resource, still be underutilized at present.Its alumina content is more than 25%, and iron oxide content is more than 10%, and silica content is about 6%, and alumina silica ratio is about 7.Develop this type of bauxite resource,, have important social and economic significance rationally utilizing national resources.
On the other hand, along with China's industrial expansion, demand to bauxite sharply increases, bauxite supply day is becoming tight, particularly the bauxite supply of high-quality can not satisfy the needs of alumina producing, cause alumina production cost to rise, ore resource more and more becomes the restraining factors of aluminum oxide industry development.Therefore, development and use high-iron bauxite resource has great importance for China's aluminium industrial sustainable development.
Current 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.Several method is arranged, and as sintering process, this method is suitable for handling and contains the higher low-grade bauxite stone of aluminium, requires Al
2O
3/ SiO
2Be 3～5, Fe
2O
3Less than 10%, the discharging waste gas thing has certain pollution to ambient air in the sintering; And for example Bayer process is applicable to salic height, SiO
2Low allitic soil ore requires Al
2O
3Greater than 65%, Al
2O
3/ SiO
2Greater than 7; Iron oxide in the ore does not react with alkali in this method flow process, and the high red mud content of iron is big, and the laterite washing complexity easily causes alkali and aluminium oxide to run off, and environment is had certain pollution, and energy consumption is big; For the bauxite of handling medium grade, mainly use combination method at present in addition, promptly in the red mud of Bayer process, add the alumina silica ratio that the low grade ore of part improves sintering process, generally require Al in China
2O
3Greater than 60%, Al
2O
3/ SiO
2Be 5～7, Fe
2O
3Less than 10%, sulphur is the air pollution harmful substance in sintering, is difficult for adopting the high bauxite of sulfur-bearing.
For handling high-iron bauxite, Fe
2O
3Greater than 10%, Al
2O
3Greater than 25%, above-mentioned several method is not suitable for adopting.
Three, summary of the invention:
The objective of the invention is, by the physical upgrading method aluminium oxide, iron oxide are separated from bauxite, relatively enrichment reaches the concentrate index request that aluminium, iron are smelted, and realizes the method that aluminium in the high-iron bauxite, ferromagnetic choosing separate.
Technical scheme of the present invention is:
The method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite, comprise and adopt disintegrating machine ore reduction to 0～25mm granularity, use the grinding attachment fine grinding again, select granularity by grader and account for 50～85% ore particle for-0.074mm, thicker particle returns grinding attachment fine grinding again, is pumped (conveying) medium with water or air, and ore pulp or breeze conductance are gone in the magnetic separator, iron oxide magnetic mineral in ore pulp or the breeze stream are separated with the aluminium oxide non magnetic ore, wherein:
The iron oxide content of a, high-iron bauxite is more than or equal to 10%, and alumina content is more than or equal to 25%,
B, when being pumped (conveying) medium with water, pulp density is 15～50%, or when being pumped (conveying) medium with the air, the volumetric concentration of breeze is 0.1～50% in the air-flow,
The magnetic field intensity of the magnetic separator of c, separation magnetic mineral and non magnetic ore is respectively: weak magnetic 0～5000 oersted, strong magnetic 5000～20000 oersteds, background magnetic field intensity 0～20000 oersted of High-gradient Magnetic magnetic separator, can utilize a kind of any combination of or two or three magnetic separator to carry out ore-dressing practice, or the magnetic separation material is carried out the repetition magnetic concentration working.
D, with iron oxide magnetic thing ore pulp or breeze stream, or aluminium oxide nonmagnetics ore pulp or breeze stream carries out water by vacuum filter and separates with iron oxide or aluminium oxide solid phase, or make air and iron oxide or aluminium oxide gas phase separation by dust collection device, obtain the oxygen enrichment iron ore concentrate respectively, or rich aluminium oxide concentrate.
The grinding particle size scope of control for-the 0.074mm granularity accounts for 70～78%, is the medium transport ore pulp with water, adopts the ore pulp pump to carry at pipeline, import magnetic separator through pipeline, or be to adopt blower fan in pipeline, to carry by medium transport breeze stream with the air, import magnetic separator through pipeline.
Adopt weak magnetic separator, strong magnetic separator, when the combination magnetic separator of High-gradient Magnetic magnetic separator separates, at first ore pulp or breeze conductance being gone into weak magnetic separator carries out magnetic separation and separates, filter or gather dust and isolate first oxygen enrichment iron ore concentrate, remaining material after weak magnetic separator magnetic separation, import strong magnetic separator again and carry out the magnetic separation separation, filter or gather dust and isolate second batch of oxygen enrichment iron ore concentrate, import the High-gradient Magnetic magnetic separator at last and carry out the magnetic separation separation, filter or gather dust and isolate the 3rd batch of oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate richness, remainder is the nonmagnetics mine tailing, or at first ore pulp or breeze conductance are gone into strong magnetic separator, import weak magnetic separator again, import the High-gradient Magnetic magnetic separator at last and isolate the oxygen enrichment iron ore concentrate in three batches, rich aluminium oxide concentrate, or ore pulp or breeze stream at first imported the High-gradient Magnetic magnetic separator, import strong magnetic separator again, import weak magnetic separator at last and isolate the oxygen enrichment iron ore concentrate in three batches, rich aluminium oxide concentrate, or ore pulp or breeze flow point do not imported weak magnetic separator, strong magnetic separator, the High-gradient Magnetic magnetic separator carries out magnetic separation simultaneously respectively, filter or gather dust, obtain first respectively, two, three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Ore pulp or breeze stream at first import weak magnetic separator and carry out magnetic separation, again through the strong magnetic separator magnetic separation, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, perhaps ore pulp or breeze stream at first enters the strong magnetic separator magnetic separation, enters weak magnetic separator magnetic separation again, after filtration or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Ore pulp or breeze stream at first import weak magnetic separator magnetic separation, again through the magnetic separation of High-gradient Magnetic magnetic separator, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing, or at first through the magnetic separation of High-gradient Magnetic magnetic separator, enter weak magnetic separator magnetic separation again, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Ore pulp or breeze stream at first pass through the strong magnetic separator magnetic separation, again through the magnetic separation of High-gradient Magnetic magnetic separator, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing, or, pass through the strong magnetic separator magnetic separation at first through the magnetic separation of High-gradient Magnetic magnetic separator, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Ore pulp or breeze stream filters or gathers dust and isolate oxygen enrichment ferromagnetism thing through weak magnetic separator magnetic separation, and all the other be rich aluminium oxide nonmagnetics, or after weak magnetic separator magnetic separation remaining material, magnetic separator magnetic separation once more a little less than returning.
Ore pulp or breeze stream filters or gathers dust and isolate oxygen enrichment ferromagnetism thing through the strong magnetic separator magnetic separation, and all the other are rich aluminium oxide nonmagnetics, or after the strong magnetic separator magnetic separation remaining material, return strong magnetic separator magnetic separation once more.
Ore pulp or breeze stream filters or gathers dust and isolate oxygen enrichment ferromagnetism thing through the magnetic separation of high gradient magnetic separator, and all the other are rich aluminium oxide nonmagnetics, or after the magnetic separation of High-gradient Magnetic magnetic separator remaining material, return the magnetic separation once more of High-gradient Magnetic magnetic separator.
Vacuum filter is the vacuum-type drum filter of interior or outer filter, or is vacuum horizontal table filter or for the vacuum leaf filter, dust collection device is cloth-bag type dust collection device or electrostatic dust collection equipment.
Positive beneficial effect of the present invention is:
1. 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, will make contributions for the aluminium industry of development China.
2. the present invention utilizes the physical method of magnetic technique, realizes that the ferro-aluminum in the bauxite separates, and does not produce chemical contamination, and is favourable to environmental protection.
3. separation method of the present invention, its ore reduction, the levigate many small cement plant off-the-shelf equipments that utilize stopping production reduce investment cost, and personnel provide the reemployment chance for the stopping production small cement plant, also find new outlet for stand-by equipment.
4. but mine tailing making cement factory's raw material after the magnetic separation and iron ore concentrate do not have discarded object basically as iron-smelting raw material, have to fully utilize effect preferably.
5. separation method of the present invention provides a new approach that utilizes to the abundant comprehensive utilization of China's bauxite resource.
Four. description of drawings:
Fig. 1 is one of technological process block-diagram of the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite
Fig. 2 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram two
Fig. 3 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram three
Fig. 4 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram four
Fig. 5 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram five
Fig. 6 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram six
Fig. 7 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram seven
Fig. 8 be the method that the ferro-aluminum magnetic separation separates in the high-iron bauxite technological process block-diagram eight
Five. the specific embodiment:
Embodiment one: referring to Fig. 1, with iron oxide content 13～20%, alumina content is broken into 0～25mm granularity at 30～48% high-iron bauxite stone through jaw crusher or ring hammer crusher.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 50～85%, be controlled at 70～78%, alum clay ore particle greater than the 0.074mm granularity, again drop in ore grinding ball mill or the rod mill ore grinding again, adding clear water simultaneously at ore grinding, to make pulp density be 30～35%, the ore pulp that mill is good is pumped into pulp tank by ore pulp, import in the strong magnetic separator, its magnetic field intensity is 5000～20000 oersteds, carries out magnetic separation and isolates magnetic thing iron oxide ore pulp and namagnetic substance alumina pulp.The iron oxide ore pulp is passed through vacuum-type drum filter elimination moisture content, obtain the oxygen enrichment iron ore concentrate, simultaneously with alumina pulp elimination moisture content, obtain rich aluminium oxide concentrate, remaining mine tailing is a namagnetic substance, or remaining namagnetic substance returns magnetic separation once more in the strong magnetic separator once more, but gained true tailings making cement or other raw material fully utilize.
Embodiment two: each implementation step and the embodiment one of present embodiment are basic identical, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 11～15%, and alumina content is 35～45%, and pulp density is 15～25%, adopt weak magnetic separator to carry out iron, aluminium separation, the magnetic field intensity of magnetic separator is 0～5000 oersted, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remaining mine tailing.
Embodiment three: the separating step of present embodiment and embodiment one is basic identical, something in common does not repeat, and difference is: in high-iron bauxite, iron oxide content is 15～18%, alumina content is 30～35%, pulp density is 45～50%, adopts the High-gradient Magnetic magnetic separator, and background magnetic field intensity is 0～20000 oersted, obtain oxygen enrichment iron ore slurry and rich alumina pulp, separate through drainage, get oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remaining mine tailing.
Embodiment four: referring to Fig. 2, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 18～22%, alumina content is 45～55%, pulp density is 15～20%, ore pulp is earlier through strong magnetic separator, and again through the High-gradient Magnetic magnetic separator, its magnetic field intensity is respectively 5000～20000 oersteds and 0～20000 oersted, obtain two batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment five: referring to Fig. 2, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 10～15%, alumina content is 30～45%, pulp density is 25～30%, ore pulp passes through strong magnetic separator more earlier through the High-gradient Magnetic magnetic separator, and its magnetic field intensity is respectively 0～20000 oersted and 5000～20000 oersteds, obtain two batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment six: referring to Fig. 2, separation ore-sorting process and step are with embodiment one, something in common does not repeat, difference is: in the bauxite of present embodiment, iron oxide content is 10～14%, alumina content is 25～30%, pulp density is 45～50%, through weak magnetic separator ore dressing, again through the ore dressing of High-gradient Magnetic magnetic separator, its magnetic field intensity is respectively 0～5000 oersted and 0～20000 oersted to ore pulp earlier, obtain two batches of enrichment iron oxide ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment seven: referring to Fig. 2, separation ore-sorting process and step are with embodiment one, something in common does not repeat, difference is: in the bauxite of present embodiment, iron oxide content is 20～22%, alumina content is 25～30%, pulp density is 20～30%, through the ore dressing of High-gradient Magnetic magnetic separator, again through weak magnetic separator ore dressing, its magnetic field intensity is respectively 0～20000 oersted and 0～5000 oersted to ore pulp earlier, obtain two batches of enrichment iron oxide ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment eight: referring to Fig. 2, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 16～20%, alumina content is 35～45%, pulp density is 35～40%, ore pulp is earlier through weak magnetic separator magnetic separation, and again through the strong magnetic separator magnetic separation, its magnetic field intensity is 0～5000 oersted and 5000～20000 oersteds, obtain two batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment nine: referring to Fig. 2, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 20～25%, alumina content is 25～35%, pulp density is 30～40%, ore pulp is earlier through the strong magnetic separator magnetic separation, and again through weak magnetic separator magnetic separation, its magnetic field intensity is 5000～20000 oersteds and 0～5000 oersted, obtain two batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment ten: referring to Fig. 3, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 11～15%, alumina content is 30～40%, pulp density is 15～20%, ore pulp is earlier through weak magnetic separator, again through strong magnetic separator, after the High-gradient Magnetic magnetic separator, its magnetic field intensity is 0～5000 oersted, 5000～20000 oersteds and 0～20000 oersted, obtain three batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment 11: referring to Fig. 3, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～25%, alumina content is 25～30%, pulp density is 25～30%, ore pulp is earlier through strong magnetic separator, again through weak magnetic separator, after the High-gradient Magnetic magnetic separator, its magnetic field intensity is 5000～20000 oersteds, 0～5000 oersted and 0～20000 oersted, obtain three batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment 12: referring to Fig. 3, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 30～40%, pulp density is 20～30%, ore pulp is earlier through the High-gradient Magnetic magnetic separator, again through weak magnetic separator, after strong magnetic separator, its magnetic field intensity is 0～20000 oersted, 0～5000 oersted and 5000～20000 oersteds, obtain three batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment 13: referring to Fig. 3, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 10～15%, alumina content is 30～40%, pulp density is 20～30%, ore pulp is earlier through the High-gradient Magnetic magnetic separator, again through strong magnetic separator, after weak magnetic separator, its magnetic field intensity is 0～20000 oersted, 5000～20000 oersteds and 0～5000 oersted, obtain three batches of oxygen enrichment iron ore slurries respectively, rich alumina pulp separates through drainage, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment 14: referring to Fig. 4, separation process and step are substantially with embodiment one, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 35～45%, pulp density is 25～30%, ore pulp passes through weak magnetic separator simultaneously respectively, strong magnetic separator, the High-gradient Magnetic magnetic separator, its magnetic field intensity is respectively 0～5000 oersted, 5000～20000 oersteds and 5000～20000 oersteds obtain first respectively, two, three batches of oxygen enrichment iron ore slurries and rich alumina pulp, separate through drainage, get oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate.
Embodiment 15: referring to Fig. 5,11～15%, alumina content is 35～45% with iron oxide content, high-iron bauxite stone be broken into 0～25mm granularity through jaw crusher or ring hammer crusher.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 50～85%, be controlled at 70～78%, alum clay ore particle greater than the 0.074mm granularity, again drop into ore grinding again in ore grinding ball mill or the pound grinding machine, take the air as medium transport breeze stream, adopt blower fan to carry at pipeline, making breeze flow volume concentration is 10～25%, import in the weak magnetic separator through pipeline, the magnetic field intensity of weak magnetic separator is 0～5000 oersted, carry out magnetic separation and separate, after separator process cloth bag or electricity gather dust, obtain oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate respectively, remaining mine tailing is a namagnetic substance, or remaining namagnetic substance returns magnetic separation once more in the weak magnetic separator once more, but gained true tailings making cement or other raw material fully utilize.
Embodiment 16: the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, and alumina content is 45～55%, and breeze flow volume concentration is 1～15%, adopt strong magnetic separator to carry out iron, aluminium separation, the magnetic field intensity of magnetic separator is 5000～20000 oersteds, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remaining mine tailing.
Embodiment 17: the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～25%, and alumina content is 45～55%, and breeze flow volume concentration is 1～25%, adopt the High-gradient Magnetic magnetic separator to carry out iron, aluminium separation, the background magnetic field intensity of magnetic separator is 0～20000 oersted, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remaining mine tailing.
Embodiment 18: referring to Fig. 6, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, and difference is: in the high ferro aluminum ore, iron oxide content is 10～15%, alumina content is 25～35%, breeze flow volume concentration is 5～30%, earlier through weak magnetic separator, again through the High-gradient Magnetic magnetic separator, its magnetic field intensity is 0～5000 oersted and 0～20000 oersted, obtains two batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 19: referring to Fig. 6, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, and difference is: in the high ferro aluminum ore, iron oxide content is 15～18%, alumina content is 30～35%, breeze flow volume concentration is 5～15%, earlier through the High-gradient Magnetic magnetic separator, again through weak magnetic separator, its magnetic field intensity is 0～20000 oersted and 0～5000 oersted, obtains two batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 20: referring to Fig. 6, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 10～15%, alumina content is 35～50%, breeze flow volume concentration is 8～35%, earlier through strong magnetic separator, again through the High-gradient Magnetic magnetic separator, its magnetic field intensity is 5000～20000 oersteds and 0～20000 oersted, after gathering dust, obtains two batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 21: referring to Fig. 6, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 35～40%, breeze flow volume concentration is 5～15%, earlier through the High-gradient Magnetic magnetic separator, again through strong magnetic separator, its magnetic field intensity is 0～20000 oersted and 5000～20000 oersteds, after gathering dust, obtains two batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 22: referring to Fig. 6, with embodiment 15, something in common does not repeat substantially for the separation process of present embodiment and step, and difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 30～35%, and breeze flow volume concentration is 5～10%, earlier through weak magnetic separator, again through strong magnetic separator, its magnetic field intensity is 0～5000 oersted and 5000～20000 oersteds, after gathering dust, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate respectively.
Embodiment 23: referring to Fig. 6, with embodiment 15, something in common does not repeat substantially for the separation process of present embodiment and step, and difference is: in the high ferro aluminum ore, iron oxide content is 10～20%, alumina content is 25～35%, and breeze flow volume concentration is 10～20%, earlier through strong magnetic separator, again through weak magnetic separator, its magnetic field intensity is 5000～20000 oersteds and 0～5000 oersted, after gathering dust, gets oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate respectively.
Embodiment 24: referring to Fig. 7, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 35～40%, breeze flow volume concentration is 2～15%, earlier through weak magnetic separator, again through strong magnetic separator, after the High-gradient Magnetic magnetic separator, its magnetic field intensity is 0～5000 oersted, 5000～20000 oersteds and 0～20000 oersted, after gathering dust, obtains three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 25: referring to Fig. 7, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 12～18%, alumina content is 30～40%, breeze flow volume concentration is 10～15%, earlier through strong magnetic separator, again through weak magnetic separator, after the High-gradient Magnetic magnetic separator, its magnetic field intensity is 5000～20000 oersteds, 0～5000 oersted and 0～20000 oersted, after gathering dust, obtains three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 26: referring to Fig. 7, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 10～20%, alumina content is 30～45%, breeze flow volume concentration is 6～15%, earlier through the High-gradient Magnetic magnetic separator, again through weak magnetic separator, after strong magnetic separator, its magnetic field intensity is 0～20000 oersted, 0～5000 oersted and 5000～20000 oersteds, after gathering dust, obtains three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 27: referring to Fig. 7, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 35～45%, breeze flow volume concentration is 10～15%, earlier through the High-gradient Magnetic magnetic separator, again through strong magnetic separator, after weak magnetic separator, its magnetic field intensity is 0～20000 oersted, 5000～20000 oersteds and 0～5000 oersted, after gathering dust, obtains three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate respectively.
Embodiment 28: referring to Fig. 8, the separation process of present embodiment and step are substantially with embodiment 15, something in common does not repeat, difference is: in the high ferro aluminum ore, iron oxide content is 15～20%, alumina content is 30～50%, breeze flow volume concentration is 1～15%, pass through weak magnetic separator simultaneously respectively, strong magnetic separator, the High-gradient Magnetic magnetic separator, its magnetic field intensity is respectively 0～5000 oersted, 5000～20000 oersteds and 0～20000 oersted are after gathering dust, obtain first respectively, two, three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate, remainder is non magnetic mine tailing.
Claims (10)
1, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite, comprise and adopt disintegrating machine ore reduction to 0～25mm granularity, use the grinding attachment fine grinding again, select granularity by grader and account for 50～85% ore particle for-0.074mm, thicker particle returns grinding attachment fine grinding again, is pumped (conveying) medium with water or air, and ore pulp or breeze conductance are gone in the magnetic separator, iron oxide magnetic mineral in ore pulp or the breeze stream are separated with the aluminium oxide non magnetic ore, it is characterized in that:
The iron oxide content of a, high-iron bauxite is more than or equal to 10%, and alumina content is more than or equal to 25%,
B, when being pumped (conveying) medium with water, pulp density is 15～50%, or when being pumped (conveying) medium with the air, the volumetric concentration of breeze is 0.1～50% in the air-flow,
The magnetic field intensity of the magnetic separator of c, separation magnetic mineral and non magnetic ore is respectively: weak magnetic 0～5000 oersted, strong magnetic 5000～20000 oersteds, background magnetic field intensity 0～20000 oersted of High-gradient Magnetic magnetic separator, can utilize a kind of any combination of or two or three magnetic separator to carry out ore-dressing practice, or the magnetic separation material is carried out the repetition magnetic concentration working.
D, with iron oxide magnetic thing ore pulp or breeze stream, or aluminium oxide nonmagnetics ore pulp or breeze stream carries out water by vacuum filter and separates with iron oxide or aluminium oxide solid phase, or make air and iron oxide or aluminium oxide gas phase separation by dust collection device, obtain the oxygen enrichment iron ore concentrate respectively, or rich aluminium oxide concentrate.
2, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1, it is characterized in that: the grinding particle size scope of control accounts for 70～78% for-0.074mm granularity, with water is the medium transport ore pulp, adopt the ore pulp pump to carry at pipeline, import magnetic separator through pipeline, or be to adopt blower fan in pipeline, to carry by medium transport breeze stream with the air, import magnetic separator through pipeline.
3, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: adopt weak magnetic separator, strong magnetic separator, when the combination magnetic separator of High-gradient Magnetic magnetic separator separates, at first ore pulp or breeze conductance being gone into weak magnetic separator carries out magnetic separation and separates, filter or gather dust and isolate first oxygen enrichment iron ore concentrate, remaining material after weak magnetic separator magnetic separation, import strong magnetic separator again and carry out the magnetic separation separation, filter or gather dust and isolate second batch of oxygen enrichment iron ore concentrate, import the High-gradient Magnetic magnetic separator at last and carry out the magnetic separation separation, filter or gather dust and isolate the 3rd batch of oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate richness, remainder is the nonmagnetics mine tailing, or at first ore pulp or breeze conductance are gone into strong magnetic separator, import weak magnetic separator again, import the High-gradient Magnetic magnetic separator at last and isolate the oxygen enrichment iron ore concentrate in three batches, rich aluminium oxide concentrate, or ore pulp or breeze stream at first imported the High-gradient Magnetic magnetic separator, import strong magnetic separator again, import weak magnetic separator at last and isolate the oxygen enrichment iron ore concentrate in three batches, rich aluminium oxide concentrate, or ore pulp or breeze flow point do not imported weak magnetic separator, strong magnetic separator, the High-gradient Magnetic magnetic separator carries out magnetic separation simultaneously respectively, filter or gather dust, obtain first respectively, two, three batches of oxygen enrichment iron ore concentrates and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
4, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream at first import weak magnetic separator and carry out magnetic separation, again through the strong magnetic separator magnetic separation, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, perhaps ore pulp or breeze stream at first enters the strong magnetic separator magnetic separation, enter weak magnetic separator magnetic separation again, after filtration or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
5, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream at first import weak magnetic separator magnetic separation, again through the magnetic separation of High-gradient Magnetic magnetic separator, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing, or at first through the magnetic separation of High-gradient Magnetic magnetic separator, enter weak magnetic separator magnetic separation again, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
6, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream at first pass through the strong magnetic separator magnetic separation, again through the magnetic separation of High-gradient Magnetic magnetic separator, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing, or at first through the magnetic separation of High-gradient Magnetic magnetic separator, pass through the strong magnetic separator magnetic separation again, filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate, rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
7, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream are through weak magnetic separator magnetic separation, filter or gather dust and isolate oxygen enrichment ferromagnetism thing, all the other are rich aluminium oxide nonmagnetics, or after weak magnetic separator magnetic separation remaining material, return weak magnetic separator magnetic separation once more.
8, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream are through the strong magnetic separator magnetic separation, filter or gather dust and isolate oxygen enrichment ferromagnetism thing, all the other are rich aluminium oxide nonmagnetics, or after the strong magnetic separator magnetic separation remaining material, return strong magnetic separator magnetic separation once more.
9, the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: ore pulp or breeze stream are through the magnetic separation of high gradient magnetic separator, filter or gather dust and isolate oxygen enrichment ferromagnetism thing, all the other are rich aluminium oxide nonmagnetics, or after the magnetic separation of High-gradient Magnetic magnetic separator remaining material, return the magnetic separation once more of High-gradient Magnetic magnetic separator.
10. the method that the ferro-aluminum magnetic separation separates in a kind of high-iron bauxite according to claim 1 and 2, it is characterized in that: vacuum filter is the vacuum-type drum filter of interior or outer filter, or be vacuum horizontal table filter or for the vacuum leaf filter, dust collection device is cloth-bag type dust collection device or electrostatic dust collection equipment.
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| CNB2004100104007A CN100430145C (en) | 2004-07-12 | 2004-07-12 | Method for magnetic separating of aluminum and iron in high iron bauxite |
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| CNB2004100104007A CN100430145C (en) | 2004-07-12 | 2004-07-12 | Method for magnetic separating of aluminum and iron in high iron bauxite |
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Cited By (13)
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| CN1911523B (en) * | 2005-08-09 | 2010-04-28 | 郝志刚 | Technological method capable of enhancing ore dressing efficiency and ore dressing index |
| CN101302020B (en) * | 2008-06-26 | 2010-11-24 | 贵州大学 | High-sulphur alumyte desulfuration method |
| CN1765520B (en) * | 2005-09-22 | 2011-05-18 | 毕舒 | Method for extracting Fe from ion ore tailings |
| CN101417260B (en) * | 2008-12-05 | 2011-08-10 | 长沙有色冶金设计研究院有限公司 | High iron bauxite dressing method |
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| US4272029A (en) * | 1976-10-28 | 1981-06-09 | Reynolds Metals Company | Upgrading of bauxites, bauxitic clays, and aluminum mineral bearing clays |
| US4781298A (en) * | 1986-10-07 | 1988-11-01 | Engelhard Corporation | Process for beneficiating clay at high solids |
| CN2176186Y (en) * | 1993-05-31 | 1994-09-07 | 吉林市永磁应用技术开发公司 | Rare-earth permanent-magnet dry-type superfine powder magnetic separator |
| CN1164368C (en) * | 2001-09-11 | 2004-09-01 | 北京矿冶研究总院 | Bauxite dressing method |
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| CN113145295B (en) * | 2021-04-06 | 2023-09-19 | 昆明理工大学 | Magnetic separation upgrading method for high-iron low-grade bauxite |
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