CN1775969A - Method for leaching out inpurity iron in bauxite by chemical-biological method - Google Patents
Method for leaching out inpurity iron in bauxite by chemical-biological method Download PDFInfo
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- CN1775969A CN1775969A CNA200510124008XA CN200510124008A CN1775969A CN 1775969 A CN1775969 A CN 1775969A CN A200510124008X A CNA200510124008X A CN A200510124008XA CN 200510124008 A CN200510124008 A CN 200510124008A CN 1775969 A CN1775969 A CN 1775969A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000002386 leaching Methods 0.000 title claims abstract description 20
- 238000010170 biological method Methods 0.000 title claims description 11
- 229910001570 bauxite Inorganic materials 0.000 title abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 23
- 241000228245 Aspergillus niger Species 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 235000015097 nutrients Nutrition 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 244000005700 microbiome Species 0.000 claims description 7
- 230000001580 bacterial effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 235000013379 molasses Nutrition 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 230000001954 sterilising effect Effects 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000011534 incubation Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract description 5
- 238000000855 fermentation Methods 0.000 abstract description 4
- 230000004151 fermentation Effects 0.000 abstract description 4
- 241000894006 Bacteria Species 0.000 abstract 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000000605 extraction Methods 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 238000002050 diffraction method Methods 0.000 description 4
- 235000006408 oxalic acid Nutrition 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 230000031018 biological processes and functions Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910001608 iron mineral Inorganic materials 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 229910001569 aluminium mineral Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 241000605118 Thiobacillus Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical class C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 1
- -1 iron ion Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a biology and chemical method to remove the impurity iron in bauxite ore. The feature is that it adopts fermentation liquor leaching out iron of aspergillus niger bacterium that has strong ability to produce acid. 1-4% vitriol is added into the fermentation liquor as leaching out agent. After process by the method, the ferric oxide content is 0.4-0.9% and the aluminum leaching out ratio is less than 1.0%.
Description
Technical field
An a kind of chemical biological process soaks the method except that impurity iron in the bauxitic ore, and the chemical-biological method that relates to the mine tailing stone that is produced behind a kind of iron content bauxitic ore, particularly low-grade bauxite flotation removes the method for impurity iron in the bauxitic ore.
Background technology
Bauxitic ore during as raw material for refractory, is needed to reduce the iron in ore mineral content, reduce the performance of refractory materials because the iron in the ore, titanium impurity can make refractory materials at high temperature glassy phase occur prematurely.Iron mineral existence form in bauxite comprises: rhombohedral iron ore, pyrrhosiderite, lepidocrocite and their hydrate also have limonite, colloid ironic hydroxide and magnetite and maghemite etc.
Ore concentration of bauxite deironing research method can be divided into physics method, chemical method and biological process.Floating-magnetic combined process flow is mostly adopted in the deironing of physics method, to removing iron mineral certain effect is arranged, but effect is relatively poor, and is invalid to removing in the bauxite character iron; The chemical method deironing is maximum with salt acid system and chlorination process research, and the deferrization effect is good than the physics method, existing certain research at aspects such as chemical removal of iron mechanism, kinetics, but environmental issue is still failed fine solution; Biological process ore dressing iron removal technology has cost and energy consumption is low, the advantage of non-secondary pollution, but biological respinse speed is slow, and the deironing time is long, and the decreasing ratio of iron is not high.The method of seeking impurity iron in the new bauxitic ore is the problem that people explore always.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provide a kind of cost lower, not have pollution, the chemical-biological method that can not destroy the crystalline structure of aluminum-containing mineral soaks the method except that impurity iron in the bauxitic ore.
The objective of the invention is to be achieved through the following technical solutions.
A kind of chemical-biological method soaks the method except that impurity iron in the bauxitic ore, it is characterized in that soaking except that impurity iron in the bauxitic ore be to adopt aspergillus niger strain from the mine screening (culture presevation is at China Committee for Culture Collection of Microorganisms common micro-organisms center, and preserving number is: fermented liquid CGMCC NO.1539) soaks the ore deposit deironing with strong acid producing ability.
A kind of chemical-biological method soaks the method except that impurity iron in the bauxitic ore, it is characterized in that concrete steps are as follows:
(1) preparation of ore leachate
Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min; After the substratum cooling, the mycelium of inoculated aspergillus niger bacterial strain or spore; Culture condition is: 25 ℃-35 ℃ of temperature, incubation time 3 days-5 days; When the pH of nutrient solution is reduced to 1.5-2.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 0.5-1.0 with sulfuric acid, be made into leach liquor;
(2) soak the ore deposit deironing
After leach liquor prepares, under 80 ℃-90 ℃, stir and soak except that the impurity iron in the ore; It is 10%-30% that ore pulp during leaching contains concentration admittedly, and the time is 6h, refilters washing.
Discover that it is very effective that the mixture of oxalic acid and mineral acid leaches the ferric oxide mineral.In leaching process, these acid performance synergies, in ferric oxide mineral decomposition course, mineral acid is as the electron donor of proton, and oxalic acid is reduced to Fe (II) by Fe (III) and iron ion complexing process has promoted leaching.The Aspergillus niger strain that filters out from aluminous mine can produce a large amount of oxalic acid process of growth, cultivate the back mycelium is separated from fermented liq, adds the vitriol oil in the fermented liquid, and adjust pH is 0.5-1.0, and gained solution is as soaking the ore deposit agent.Soaking mineral solution with this soaks except that the impurity iron mineral in the bauxite gangue 80 ℃-90 ℃ following stirrings of temperature, can make the iron oxide content in the ore drop to 0.4%-0.9%, have only the aluminium element of less than 1.0% to be leached simultaneously, can not destroy the crystalline structure of aluminium mineral in the ore basically.
The present invention has following characteristics:
(1) the present invention is the application of biotechnology in the non-sulfide ore field.In biological metallurgy research, use the report of thiobacillus ferrooxidant leaching metal sulfide maximum, but the biological metallurgy research report of non-sulfide ore is seldom arranged.Aspergillus niger strain in this patent can produce metabolism products such as a large amount of citric acids and oxalic acid during the fermentation, and these products can effectively leach the ferric oxide mineral in the ore.
(2) in the present invention's research, find, the solubleness of iron depends on the solvable metabolite of microorganism secretion in the leaching agent and the concentration of the mineral acid that added in the mineral, under the required suitable environment of microorganism growth, carry out the microorganism culturing fermentation like this, under the condition of maximum leaching velocity that can obtain iron and leaching yield, leach reaction, like this microorganism culturing with soak ore deposit reaction and can carry out continuously two different systems.
(3) studies show that, the fermented liquid of this quasi-microorganism can not only leach the impurity iron in the bauxite effectively, can effectively leach the impurity iron in the kaolin equally, improve kaolinic quality, the bauxite, the kaolin that remove impurity iron can be produced the fine refractory materials.In addition, the leaching agent that uses this quasi-microorganism tunning to be mixed with also can effectively leach the Al in overheated pretreated aluminium silicate mineral.
[description of drawings]
Fig. 1 is the process flow sheet of method of the present invention.
[embodiment]
A kind of chemical-biological method soaks the method except that impurity iron in the bauxitic ore, its soak except that impurity iron in the bauxitic ore be to adopt aspergillus niger strain from the mine screening (culture presevation is at China Committee for Culture Collection of Microorganisms common micro-organisms center, and preserving number is: fermented liquid CGMCC NO.1539) soaks the ore deposit deironing with strong acid producing ability.
A kind of chemical-biological method soaks the method except that impurity iron in the bauxitic ore, and concrete steps are as follows:
(1) preparation of ore leachate
Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min; After the substratum cooling, the mycelium of inoculated aspergillus niger bacterial strain or spore; Culture condition is: 25 ℃-35 ℃ of temperature, incubation time 3 days-5 days; When the pH of nutrient solution is reduced to 1.5-2.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 0.5-1.0 with sulfuric acid, be made into leach liquor;
(2) soak the ore deposit deironing
After leach liquor prepares, under 80 ℃-90 ℃, stir and soak except that the impurity iron in the ore; The employing stirring intensity is 150r/min-250r/min, and pulp density is 10%-30%, and the treatment time is 6h, refilters washing.
Embodiment 1
At first prepare ore leachate; Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min.After the substratum cooling, inoculated aspergillus niger YJY-1
#The mycelium of bacterial strain or spore.Culture condition is: 35 ℃ of temperature, rotating speed 150r/min, during cultivation 5 days.When the pH of nutrient solution is reduced to 1.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 0.5 with sulfuric acid, be made into leaching agent.
Get 1
#Iron oxide content is 13.18% in the ore, and ore leaches behind granularity＜174 μ m through broken, ball milling, soaks the ore deposit condition and is: 80 ℃ of extraction temperatures, ore pulp consolidates that to contain weight concentration be 10%, shaking speed 150r/min, extraction time 6h during leaching.Filtered while hot and washing, the oven dry back is detected and is soaked the content of iron in the slag, aluminium, silicon and carry out the X-diffraction analysis.Soak the ore deposit and the results are shown in Table 1.
Embodiment 2
At first prepare ore leachate; Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min.After the substratum cooling, inoculated aspergillus niger YJY-1
#The mycelium of bacterial strain or spore.Culture condition is: 25 ℃ of temperature, rotating speed 250r/min, incubation time 5 days.When the pH of nutrient solution is reduced to 2.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 1.0 with sulfuric acid, be made into leaching agent.
Get 2
#Iron oxide content is 4.31%, 2 in the ore
#Ore is a bauxite, directly leaches.Soaking the ore deposit condition is: 85 ℃ of extraction temperatures, ore pulp contains weight concentration 20% admittedly, shaking speed 200r/min, extraction time 6h.Filtered while hot and washing, the oven dry back is detected and is soaked the content of iron in the slag, aluminium, silicon and carry out the X-diffraction analysis.Soak the ore deposit and the results are shown in Table 2.
Embodiment 3
At first prepare ore leachate; Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min.After the substratum cooling, inoculated aspergillus niger YJY-1
#The mycelium of bacterial strain or spore.Culture condition is: 30 ℃ of temperature, rotating speed 200r/min, incubation time 4 days.When the pH of nutrient solution is reduced to 1.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 0.7 with sulfuric acid, be made into leaching agent.
Get 3
#Iron oxide content is 2.26% in the ore.3
#Ore is a bauxite, directly leaches.Soaking the ore deposit condition is: 90 ℃ of extraction temperatures, pulp density 30%, shaking speed 250r/min, extraction time 6h.Filtered while hot and washing, the oven dry back is detected and is soaked the content of iron in the slag, aluminium, silicon and carry out the X-diffraction analysis.Soak the ore deposit and the results are shown in Table 3.
Can find that chemical-biological method all has good de-ferrous effect to 3 ores, the content of handling ferric oxide in the ore of back all is lower than 1%.By the X-diffraction analysis, the crystalline structure of aluminium mineral does not have destroyedly basically in the ore, has only the aluminium element of less than 1% to be leached.
Table 11
#Ore chemistry-biological process de-ferrous effect (%)
| Chemical ingredients | Fe 2O 3 | Al 2O 3 | SiO 2 |
| Before the leaching | 13.18 | 56.90 | 10.89 |
| Soak remove after | 0.88 | 66.10 | 10.89 |
Table 22
#Ore chemistry-biological process de-ferrous effect (%)
| Chemical ingredients | Fe 2O 3 | Al 2O 3 | SiO 2 |
| Before the leaching | 4.31 | 60.70 | 13.26 |
| Soak remove after | 0.52 | 64.42 | 14.07 |
Table 33
#Ore chemistry-biological process de-ferrous effect (%)
| Chemical ingredients | Fe 2O 3 | Al 2O 3 | SiO 2 |
| Before the leaching | 9.56 | 40.20 | 26.45 |
| Soak remove after | 0.46 | 42.30 | 26.56 |
Claims (2)
1. a chemical-biological method soaks the method except that impurity iron in the bauxitic ore, it is characterized in that soaking except that impurity iron in the bauxitic ore be to adopt aspergillus niger strain from the mine screening (culture presevation is at China Committee for Culture Collection of Microorganisms common micro-organisms center, and preserving number is: fermented liquid CGMCC NO.1539) soaks the ore deposit deironing with strong acid producing ability.
2. a kind of chemical-biological method according to claim 1 soaks the method except that impurity iron in the bauxitic ore, it is characterized in that concrete steps are as follows:
(1) preparation of ore leachate
Cha Shi substratum: NaNO
32g, K
2HPO
41g, KCl 0.5g, MgSO
40.5g, FeSO
40.01g, molasses 30g, water 1000mL, pH nature, 121 ℃ of sterilization 20min; After the substratum cooling, the mycelium of inoculated aspergillus niger bacterial strain or spore; Culture condition is: 25 ℃-35 ℃ of temperature, incubation time 3 days-5 days; When the pH of nutrient solution is reduced to 1.5-2.5, nutrient solution is filtered the removal mycelium, fermented liquid is transferred pH to 0.5-1.0 with sulfuric acid, be made into leach liquor;
(2) soak the ore deposit deironing
After leach liquor prepares, under 80 ℃-90 ℃, stir and soak except that the impurity iron in the ore; It is 10%-30% that ore pulp during leaching contains concentration admittedly, and the time is 6h, refilters washing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510124008XA CN1775969A (en) | 2005-11-28 | 2005-11-28 | Method for leaching out inpurity iron in bauxite by chemical-biological method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004401A (en) * | 2017-11-30 | 2018-05-08 | 武汉理工大学 | A kind of method that high-phosphorus iron ore dephosphorization is carried out using Aspergillus niger strain zymotic fluid |
| CN109554547A (en) * | 2018-12-14 | 2019-04-02 | 华南理工大学 | A method of utilizing indium in aspergillus niger Bioleaching waste liquid crystal display |
| CN113046579A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for biologically and chemically synergistically leaching weathering crust leaching type rare earth ore |
-
2005
- 2005-11-28 CN CNA200510124008XA patent/CN1775969A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004401A (en) * | 2017-11-30 | 2018-05-08 | 武汉理工大学 | A kind of method that high-phosphorus iron ore dephosphorization is carried out using Aspergillus niger strain zymotic fluid |
| CN109554547A (en) * | 2018-12-14 | 2019-04-02 | 华南理工大学 | A method of utilizing indium in aspergillus niger Bioleaching waste liquid crystal display |
| CN109554547B (en) * | 2018-12-14 | 2020-08-18 | 华南理工大学 | Method for leaching indium in liquid crystal display by aspergillus niger organisms |
| CN113046579A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for biologically and chemically synergistically leaching weathering crust leaching type rare earth ore |
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