CN107601519A - A kind of low-grade kaolin bacterium iron-removal and whitening method - Google Patents
A kind of low-grade kaolin bacterium iron-removal and whitening method Download PDFInfo
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- CN107601519A CN107601519A CN201710997867.2A CN201710997867A CN107601519A CN 107601519 A CN107601519 A CN 107601519A CN 201710997867 A CN201710997867 A CN 201710997867A CN 107601519 A CN107601519 A CN 107601519A
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- kaolin
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Abstract
The present invention discloses a kind of low-grade kaolin bacterium iron-removal and whitening method, particularly to the kaolinic iron removaling of high iron low grade, belongs to kaolin processing technology field.The present invention utilizes iron-reducing bacterium（FeRB‑FL1404）Or the hot anaerobic bacillus(cillus anaerobicus) of producing and ethanol（ACCC 00386）It is the insoluble Fe in 200 400 mesh kaolin to particle diameter2O3Carry out being reduced into water-soluble Fe2+, then through separation of solid and liquid, produce the kaolin for removing irony, so as to improve kaolin whiteness, increase its commercial value.Pass through iron removaling so that the Fe in kaolin2O3Content drops to 0.41 0.57% by 0.93%, and natural whiteness is improved to 76.3% 70.6% by 61.2%, and 1280 DEG C of calcining whiteness are improved to 89.1% 84.7% by 81.7%, and de-ferrous effect is obvious, improves kaolin whiteness.
Description
Technical field
The invention belongs to kaolinic mineral processing method, and in particular to Fe in a kind of bacterial reduction kaolin2O3Technology
Method.
Background technology
Kaolin is a kind of important nonmetallic ore, because it has plasticity, dispersiveness, caking property, insulating properties, fire resistance
With the premium properties such as chemical stability, it has also become ceramics, rubber, papermaking, refractory material and the very important mineral of chemical industry
Raw material.In the last few years, kaolin industry development in China's was extremely rapid, because kaolin belongs to non-renewable resource and its application neck
The increasingly extension in domain, cause the kaolin starting material of papermaking and coating in current world wide very in short supply.
Iron content height low with whiteness is that especially modern industry is to kaolin the main reason for limiting kaolin application
Whiteness have extremely strict requirements.Such as in paper industry, whiteness is required to coating level kaolin>83%, containing Fe203<
0.5%；In ceramic industry, it is desirable to whiteness 80%-85%；Make high-grade porcelain ingredient requirement and contain Fe203<0.5%.But domestic at present
Kaolin product majority is low grade products, and the kaolin product quality or quantity of high-quality high-grade are all domestic far from meeting
The requirement in market, it is therefore necessary to iron-removal and whitening is carried out to kaolin, improves its whiteness and combination property, make it have it is higher can
Value.
Because the kaoline deposit of the various origin causes of formation all contains iron, majority is with Fe203Form preservation in mineral grain.
Fe203Have a significant impact to kaolinic whiteness, be the impurity composition that should be eliminated that stands in the breach so as to influence its commercial value.
Fe in kaolin203Removing, be considered as problem always in ore dressing circle.Particularly particle diameter is less than 10 μm of Iron Oxide Minerals,
Because its particle diameter is tiny and occurrence form is complicated, difficulty is brought to kaolinic purification.
At present, the conventional method for improving kaolin whiteness has Physical (such as sorting, wet cleaning process, magnetic method, floatation
Deng) and chemical method (such as oxidizing process, reducing process, oxidation-reduction method, acidleach bleaching, chlorinating roasting).Physical is usually used in
Kaolin starting material or separation harmful substance therein are enriched with, is purified kaolin, but it is low, fine size miscellaneous for content
Matter minerals separation DeGrain, it is even more to separate for lattice iron, therefore obtains the kaolin of high-quality, high whiteness value,
It is not all right to rely solely on physical separation method.Chemical method iron-removal and whitening in the prevalence of processing procedure energy expenditure is big, operation into
This height and the shortcomings of cause environmental pollution, kaolin purification is carried out especially with the chemical agent of costliness, its operating cost and
The cost of raw material is higher, caused by environmental pollution it is also more serious.
Mineral biology (predominantly bacterium) process technology is an emerging mineral process technology, and its distinguishing feature is investment
Less, cost is low, energy consumption is small, environment-friendly.The present invention uses bacterial reduction kaolin Fe203, make Fe insoluble in kaolin203
It is changed into solvable Fe2+, Fe in kaolin is reduced by separation of solid and liquid203Content, kaolin whiteness is improved, lift kaolin
The competitiveness in value of the product and its at home and abroad market, realize kaolinic deep processing and the raising of economic value.Kaolin
Bacterium iron-removal and whitening technology has its unique advantage, in the mineral resources increasingly poor and increasingly stricter situation of environmental requirement
Under, the low-grade kaolinite ore that script extraction value can be enable not high is exploited, and is extended mine life, is realized resource comprehensive
Using and sustainable development, will will produce significant economic, society and environmental benefit.
The present invention is a kind of environment-friendly type, Fe in the removal kaolin that handling process is simple and convenient to operate, cost is low203Impurity
Method, the kaolin after iron removaling is had more preferable application value.
The content of the invention
To solve the above problems, it is an object of the invention to provide iron in a kind of removal of bacteria kaolin using pure culture is miscellaneous
The method of matter.The present invention adopts the following technical scheme that：
A kind of low-grade kaolin bacterium iron-removal and whitening method, it is characterised in that comprise the following steps：
（1）It is 200-400 mesh materials that kaolin, which sieves to obtain particle diameter, then adds water, is configured to certain density ore pulp A；
（2）Carbon source, nitrogen source, surfactant and inorganic salts are added in above-mentioned ore pulp A, are configured to ore pulp B, described carbon source,
The addition of nitrogen source, surfactant and inorganic salts is 1.0-2.5%, 1.0-2.5%, 0.005-0.01% of ore pulp A mass respectively
With 0.005~0.01%；
（3）Iron-reducing bacterium FeRB-FL1404 bacterium solutions or the hot anaerobic bacillus(cillus anaerobicus) bacterium solution of producing and ethanol are added in ore pulp B, stirring is mixed
Compound C；
（4）By mixture C, insulation reaction carries out iron removaling reaction in 8-15 days at 15-40 DEG C, and bacterium will be insoluble in kaolin
Fe2O3It is reduced into solvable Fe2+；
（5）Above-mentioned steps（4）The kaolin slurry obtained after reaction obtains reducing Fe through separation of solid and liquid2O3Impurity content
Kaolin, through 105 DEG C dry after determine its whiteness and Fe2O3Content；
Step（2）Described in carbon source at least a kind of be selected from glucose, maltose, starch or molasses；Nitrogen source is at least a kind of
Selected from peptone, yeast extract, analysis for soybean powder, ammonium nitrate, ammonium chloride or urea；Surfactant it is at least a kind of selected from Tween 80,
Polyethylene glycol, dodecyl sodium sulfate or cetyl trimethylammonium bromide；Inorganic salts are at least a kind of to be selected from Na2HPO4、
NaH2PO4, sodium metaphosphate, MgSO4、CaCl2、ZnCl2Or CuCl2；
Step（3）Middle iron-reducing bacterium FeRB-FL1404 bacterium solutions or the hot anaerobic bacillus(cillus anaerobicus) bacterium of producing and ethanol that preserving number is ACCC 00386
Bacterial concentration in liquid is 107 CFU/ml -109CFU/ml, the bacterium solution addition are the 10-15% of ore pulp A mass.
Above-mentioned steps（1）Described in ore pulp A in the kaolin containing 10-25% mass fractions.
Beneficial effects of the present invention are as follows：
1. using the method for bacterium iron removaling in the present invention, Fe in bacterium and kaolin is utilized203Reduction reaction is carried out, reduces kaolinite
Fe in soil203, de-ferrous effect is obvious, improves kaolin whiteness and commercial value.
2. in kaolin bacterium method for removing iron provided by the invention, kaolin ore slurry concentration, carbon source concentration, nitrogen concentration
Selection and the selection of bacterial concentration, it may be such that bacterium can give full play to its de-ferrous effect, increase Fe203Clearance.
3. in kaolin bacterium method for removing iron provided by the invention, the concentration of the iron removaling bacterium solution of addition is 107CFU/ml-
109CFU/ml, bacterium are in the exponential phase of production, and reproduction speed is fast, active highest, can improve de-ferrous effect.
4. in kaolin bacterium method for removing iron provided by the invention, surfactant is additionally added in ore pulp, is easy to bacterium
Contact with mineral, promote the leaching effect of bacterium, shorten the iron removaling reaction time.
5. in kaolin bacterium method for removing iron provided by the invention, inorganic salts are added in ore pulp, bacterial activity is improved,
Promote bacterium to Fe in kaolin203Reduction reaction, accelerate reaction rate, improve de-ferrous effect.
Embodiment
The kaolin bacterium iron-removal and whitening method of the present invention, compared with physics and chemical whitening method, technique is simple, operation side
Just, cost is cheap, environment-friendly, is a kind of kaolin green method for removing iron.
Iron bacteria is removed used in the embodiment of the present invention：Iron bacteria --- iron-reducing bacterium is removed from described in following documents 1
FeRB-FL1404 or Chinese agriculture Microbiological Culture Collection administrative center（ACCC）Preserving number be ACCC 00386 producing and ethanol
Hot anaerobic bacillus(cillus anaerobicus), it is specific as follows：
1st, iron-reducing bacterium FeRB-FL1404, Lin Yuman, Chen little Lan, Wei Zhaodi are come from, perhaps mono- plant of iron-reducing bacterium FeRB- of rising sun duckweed
Fe in FL1404 separation and identification and its removal kaolin（Ⅲ）Research China non-metallic mineral industry guide, 2015, (1):
11-15.
2nd, the hot anaerobic bacillus(cillus anaerobicus) of producing and ethanol, from Chinese agriculture Microbiological Culture Collection administrative center（ACCC）, preserving number ACCC
00386。
Bacteria Culture is obtained into bacterium solution using this area conventional method culture.
Kaolin used in the following embodiments of the present invention is provided by Longyan Gaolingtu Co., Ltd.
Embodiment 1
A kind of kaolinic bacterium iron-removal and whitening method, it is characterised in that comprise the following steps：
1st, it is 200-400 mesh that kaolin, which is screened to particle diameter, adds water to prepare the kaolin ore slurry A of 10% mass concentration；
2nd, molasses, yeast extract are added into ore pulp A（Also referred to as yeast extract, it is commercially available prod）, Tween 80 and MgSO4, mixing is
Ore pulp B, described molasses, yeast extract, Tween 80 and MgSO are configured to after even4Addition be respectively ore pulp A mass 1.2%,
1.2%th, 0.006% and 0.008%；
3rd, it is 10 that concentration is added into ore pulp B7CFU/ml-109CFU/ml iron-reducing bacterium FeRB-FL1404 bacterium solution, adds
Measure as the 10% of ore pulp A mass, obtain mixture C；
4th, mixture C is reacted at 25 DEG C 13 days and carries out iron removaling reaction；
5. reacted kaolin is obtained removing Fe through separation of solid and liquid2O3Iron tramp kaolin；
6th, the kaolin after iron removaling determines its whiteness and Fe through 105 DEG C of dryings2O3Content.
Embodiment 2
1st, it is 200-400 mesh that kaolin, which is screened to particle diameter, adds water to prepare the kaolin ore slurry A of 10% mass concentration；
2nd, glucose, yeast extract are added into ore pulp A（Also referred to as yeast extract, it is commercially available prod）, Tween 80 and MgSO4, mixing
Ore pulp B, described glucose, yeast extract, Tween 80 and MgSO are configured to after uniformly4Addition be ore pulp A mass respectively
1.2%th, 1.2%, 0.006% and 0.008%；
3rd, it is 10 that concentration is added into ore pulp B7CFU/ml-109CFU/ml preserving numbers are that ACCC 00386 producing and ethanol heat is detested
The bacterium solution of oxygen bacillus, dosage are the 10% of ore pulp A mass, obtain mixture C；
4th, mixture C is reacted at 25 DEG C 13 days and carries out iron removaling reaction；
5th, reacted kaolin is obtained removing Fe through separation of solid and liquid2O3Iron tramp kaolin；
6th, the kaolin after iron removaling determines its whiteness and Fe through 105 DEG C of dryings2O3Content.
Embodiment 3
1st, it is 200-400 mesh that kaolin, which is screened to particle diameter, adds water to prepare the kaolin ore slurry A of 10% mass fraction；
2nd, starch, soybean cake powder, Tween 80 and ZnCl are added into ore pulp A2, ore pulp B, described shallow lake are configured to after well mixed
Powder, soybean cake powder, Tween 80 and ZnCl2Addition be 1.2%, 1.2%, 0.006% and the 0.008% of ore pulp A mass respectively；
3rd, it is 10 that concentration is added into ore pulp B7CFU/ml-109CFU/ml iron-reducing bacteriums FeRB-FL1404 bacterium solution, dosage
For the 10% of ore pulp A mass, mixture C is obtained；
4th, mixture C is reacted at 25 DEG C 13 days and carries out iron removaling reaction；
5. reacted kaolin is obtained removing Fe through separation of solid and liquid2O3Iron tramp kaolin；
6th, the kaolin after iron removaling determines its whiteness and Fe through 105 DEG C of dryings2O3Content.
Above three embodiment result such as table 1.
The kaolin of table 1 is through result before and after bacterial treatment
From embodiment 1-3, method that bacterium iron removaling is used in the present invention utilizes bacterium and Fe in kaolin203Gone back
Original reaction so that the Fe in kaolin2O3Content drops to 0.41-0.67% by 0.93%, and natural whiteness is improved extremely by 61.2%
76.3%-68.6%, 1280 DEG C of calcining whiteness are improved to 89.1%-84.7% by 81.7%, and de-ferrous effect is obvious, and it is white to improve kaolin
Degree.
Presently preferred embodiments of the present invention is the foregoing is only, all equivalent changes done according to the present patent application scope are with repairing
Decorations, it should all belong to the covering scope of the present invention.
Claims (2)
- A kind of 1. low-grade kaolin bacterium iron-removal and whitening method, it is characterised in that comprise the following steps：（1）It is 200-400 mesh materials that kaolin, which sieves to obtain particle diameter, then adds water, is configured to certain density ore pulp A；（2）Carbon source, nitrogen source, surfactant and inorganic salts are added in above-mentioned ore pulp A, are configured to ore pulp B, described carbon source, The addition of nitrogen source, surfactant and inorganic salts is 1.0-2.5%, 1.0-2.5%, 0.005-0.01% of ore pulp A mass respectively With 0.005~0.01%；（3）Iron-reducing bacterium FeRB-FL1404 bacterium solutions or the hot anaerobic bacillus(cillus anaerobicus) bacterium solution of producing and ethanol are added in ore pulp B, stirring is mixed Compound C；（4）By mixture C, insulation reaction carries out iron removaling reaction in 8-15 days at 15-40 DEG C, and bacterium will be insoluble in kaolin Fe2O3It is reduced into solvable Fe2+；（5）Above-mentioned steps（4）The kaolin slurry obtained after reaction obtains reducing Fe through separation of solid and liquid2O3Impurity content Kaolin, its whiteness and Fe are determined after 105 DEG C are dried2O3Content；Step（2）Described in carbon source at least a kind of be selected from glucose, maltose, starch or molasses；Nitrogen source is at least a kind of Selected from peptone, yeast extract, analysis for soybean powder, ammonium nitrate, ammonium chloride or urea；Surfactant it is at least a kind of selected from Tween 80, Polyethylene glycol, dodecyl sodium sulfate or cetyl trimethylammonium bromide；Inorganic salts are at least a kind of to be selected from Na2HPO4、 NaH2PO4, sodium metaphosphate, MgSO4、CaCl2、ZnCl2Or CuCl2；Step（3）Middle iron-reducing bacterium FeRB-FL1404 bacterium solutions or the hot anaerobic bacillus(cillus anaerobicus) bacterium of producing and ethanol that preserving number is ACCC 00386 Bacterial concentration in liquid is 107 CFU/ml -109CFU/ml, the bacterium solution addition are the 10-15% of ore pulp A mass.
- A kind of 2. low-grade kaolin bacterium iron-removal and whitening method according to claim 1, it is characterised in that step（1）In Kaolin containing 10-25% mass fractions in described ore pulp A.
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Cited By (5)
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| CN108996513A (en) * | 2018-08-30 | 2018-12-14 | 贺州市骏鑫矿产品有限责任公司 | A kind of method that feldspar in powder brightens |
| CN109796023A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A kind of method of kaolin microorganism iron-removal and whitening |
| CN109796026A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A kind of kaolin bleaching method of low cost |
| CN109796024A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A method of kaolin is brightened using composite nutrient culture microorganism |
| CN109796025A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A method of utilizing di-iron trioxide in Mixed Microbes also protokaolin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996513A (en) * | 2018-08-30 | 2018-12-14 | 贺州市骏鑫矿产品有限责任公司 | A kind of method that feldspar in powder brightens |
| CN109796023A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A kind of method of kaolin microorganism iron-removal and whitening |
| CN109796026A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A kind of kaolin bleaching method of low cost |
| CN109796024A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A method of kaolin is brightened using composite nutrient culture microorganism |
| CN109796025A (en) * | 2019-03-11 | 2019-05-24 | 福建师范大学 | A method of utilizing di-iron trioxide in Mixed Microbes also protokaolin |
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