CN100430145C - 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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- CN100430145C CN100430145C CNB2004100104007A CN200410010400A CN100430145C CN 100430145 C CN100430145 C CN 100430145C CN B2004100104007 A CNB2004100104007 A CN B2004100104007A CN 200410010400 A CN200410010400 A CN 200410010400A CN 100430145 C CN100430145 C CN 100430145C
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 102
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 99
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 61
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract description 36
- 239000006148 magnetic separator Substances 0.000 claims abstract description 137
- 239000012141 concentrate Substances 0.000 claims abstract description 100
- 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 57
- 239000000428 dust Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007790 solid phase Substances 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 222
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 60
- 229910052760 oxygen Inorganic materials 0.000 claims description 60
- 239000001301 oxygen Substances 0.000 claims description 60
- 238000000926 separation method Methods 0.000 claims description 41
- 230000008676 import Effects 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005191 phase separation Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 9
- 239000004568 cement Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract description 5
- 238000000053 physical method Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 2
- 239000012071 phase Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 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
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 239000003570 air Substances 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
- 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
- 238000011109 contamination Methods 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
- 238000005516 engineering process 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 present invention relates to a method for separating aluminum and iron from bauxite, particularly to a separating method for aluminum and iron magnetic separation in the iron-rich bauxite. Ores are broken into ores having the granularity of 0 to 25mm by a breaker, and then the broken ores are finely grilled by an ore-grinding device; the ground ores containing 50 to 85% of ore granules with the granularity of 0 to 0.074mm are selected by a grading machine, and coarse granules are conveyed back to the ore-grinding device to be finely ground again; water or air is used as a conveying medium, and ore slurry or ore powder flow is led into a magnetic separator to be magnetically separated; then the ore slurry or the ore powder flow of iron oxide magnetic objects or the ore slurry or the ore powder flow of aluminum oxide non-magnetic objects is filtered to make the iron oxide or the aluminum oxide separated from water in a mode of solid phase, or air is separated from the iron oxide or the aluminum oxide through dust collection in a mode of air phase; iron oxide-rich ore concentrate and aluminum oxide-rich ore concentrate can be obtained. In the present invention, aluminum and iron in iron-rich bauxite are separated by using a physical method of a magnetic technique without chemistry pollution; tailings after magnetic separation can be used as raw material in cement plants, no waste substances are produced in the method, and a new utilization way for sufficiently and comprehensively using bauxite resources in China is provided.
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 one 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 invention provides 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, with water or air is pumped (conveying) medium, 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, after the separation iron oxide magnetic thing ore pulp or breeze are flowed, 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, 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, add clear water simultaneously at ore grinding, making 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 grinding particle size scope of c, control accounts for 70～78% for-0.074mm granularity;
The magnetic field intensity of the magnetic separator of d, 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 utilizes weak magnetic separator, strong magnetic separator, the combination of High-gradient Magnetic magnetic separator or the combination of weak magnetic separator and High-gradient Magnetic magnetic separator or the combination of strong magnetic separator and High-gradient Magnetic magnetic separator to carry out ore-dressing practice.
Method for ferro-aluminum magnetic separation separation in above-mentioned a kind of high-iron bauxite, the weak magnetic separator of described employing, 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, remainder is the nonmagnetics mine tailing; Or at first ore pulp or breeze conductance are gone into strong magnetic separator, and import weak magnetic separator again, import the High-gradient Magnetic magnetic separator at last and isolate oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate in three batches; Or ore pulp or breeze stream at first imported the High-gradient Magnetic magnetic separator, and import strong magnetic separator again, import weak magnetic separator at last and isolate oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate in three batches; Or ore pulp or breeze flow point are not imported weak magnetic separator, strong magnetic separator, High-gradient Magnetic magnetic separator carry out magnetic separation simultaneously respectively, filter or gather dust, obtain first, second and third batch oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate respectively, remainder is the nonmagnetics mine tailing.
Method for ferro-aluminum magnetic separation separation in above-mentioned a kind of high-iron bauxite, described 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 and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing; Or, enter weak magnetic separator magnetic separation at first through the magnetic separation of High-gradient Magnetic magnetic separator, and to filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Method for ferro-aluminum magnetic separation separation in above-mentioned a kind of high-iron bauxite, described 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 and 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, and to filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing.
Method for ferro-aluminum magnetic separation separation in above-mentioned a kind of high-iron bauxite, described 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.
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 (5)
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, with water or air is pumped (conveying) medium, 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, after the separation iron oxide magnetic thing ore pulp or breeze are flowed, 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, 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, add clear water simultaneously at ore grinding, making 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 grinding particle size scope of c, control accounts for 70～78% for-0.074mm granularity;
The magnetic field intensity of the magnetic separator of d, 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 utilizes weak magnetic separator, strong magnetic separator, the combination of High-gradient Magnetic magnetic separator or the combination of weak magnetic separator and High-gradient Magnetic magnetic separator or the combination of strong magnetic separator and High-gradient Magnetic magnetic separator to carry out ore-dressing practice.
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: 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, remainder is the nonmagnetics mine tailing; Or at first ore pulp or breeze conductance are gone into strong magnetic separator, and import weak magnetic separator again, import the High-gradient Magnetic magnetic separator at last and isolate oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate in three batches; Or ore pulp or breeze stream at first imported the High-gradient Magnetic magnetic separator, and import strong magnetic separator again, import weak magnetic separator at last and isolate oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate in three batches; Or ore pulp or breeze flow point are not imported weak magnetic separator, strong magnetic separator, High-gradient Magnetic magnetic separator carry out magnetic separation simultaneously respectively, filter or gather dust, obtain first, second and third batch oxygen enrichment iron ore concentrate and rich aluminium oxide concentrate respectively, remainder is the nonmagnetics mine tailing.
3, 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: 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 and rich aluminium oxide concentrate, remainder is the nonmagnetics mine tailing; Or, enter weak magnetic separator magnetic separation at first through the magnetic separation of High-gradient Magnetic magnetic separator, and to filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate 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, 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 and 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, and to filter or gather dust and isolate first and second batch oxygen enrichment iron ore concentrate and 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, it is characterized in that: described 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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| CN1911523B (en) * | 2005-08-09 | 2010-04-28 | 郝志刚 | Technological method capable of enhancing ore dressing efficiency and ore dressing index |
| CN1765520B (en) * | 2005-09-22 | 2011-05-18 | 毕舒 | Method for extracting Fe from ion ore tailings |
| CN101302020B (en) * | 2008-06-26 | 2010-11-24 | 贵州大学 | Desulfurization method of high sulfur bauxite |
| CN102317481A (en) * | 2008-08-30 | 2012-01-11 | 塔塔钢铁有限公司 | Production is suitable for the novel method that iron and steel are made the iron ore concentrate of process |
| 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 |
| CN102489373B (en) * | 2011-12-07 | 2013-08-28 | 重庆京庆重型机械股份有限公司 | Mineral processing technology for processing iron ore |
| CN102974460B (en) * | 2012-12-05 | 2015-01-21 | 蒋天勇 | Method for recycling tin tailings |
| CN103100475B (en) * | 2013-02-05 | 2015-02-18 | 玉溪大红山矿业有限公司 | High-efficiency concentrate ore pulp processing device suitable for long-distance pipeline transportation |
| CN105344473B (en) * | 2015-10-29 | 2017-07-04 | 许树清 | The coal mine roof plate aluminium shale processing kaolinic method of sorting |
| CN105797848B (en) * | 2016-03-18 | 2018-07-03 | 广东省资源综合利用研究所 | A kind of high intensity magnetic separation that includes is thrown in advance except the golden method of reinforcing leaching of thin mud in golden iron oxide ore |
| CN106362858A (en) * | 2016-10-14 | 2017-02-01 | 鞍钢集团矿业有限公司 | Process for extracting cement-replacing superfine iron tailing powder from iron tailings |
| CN112194156A (en) * | 2020-10-13 | 2021-01-08 | 中国铝业股份有限公司 | Iron removing method for high-iron gibbsite type bauxite |
| CN113145295B (en) * | 2021-04-06 | 2023-09-19 | 昆明理工大学 | A magnetic separation and upgrading method for high-speed iron and low-grade bauxite |
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