CN109796021A - Utilize the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent - Google Patents
Utilize the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent Download PDFInfo
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- CN109796021A CN109796021A CN201910269556.3A CN201910269556A CN109796021A CN 109796021 A CN109796021 A CN 109796021A CN 201910269556 A CN201910269556 A CN 201910269556A CN 109796021 A CN109796021 A CN 109796021A
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Abstract
The present invention is a kind of method for preparing ellipsoid zinc silicate compound adsorbent using iron tailings.Method includes the following steps: obtaining miberal powder after iron tailings was milled to 300 mesh mesh screens, then miberal powder is added in aqueous slkali, stirs to obtain suspending liquid A；Zinc salt dissolution is obtained into solution B in deionized water；Solution B is added in suspending liquid A, continues stirring with ultrasonic and obtains suspension C；Suspension C is gone in hydrothermal reaction kettle, 4~36h is reacted under the conditions of 120~220 DEG C, obtains linen ellipsoid zinc silicate composite material.Environmental problem caused by the iron tailings accumulation that the present invention both can solve China's rich reserves, urgently utilize realizes that recycling, high added value functionalization utilize, and can provide new way for the preparation of zinc silicate.
Description
Technical field
The present invention relates to a kind of preparation method of ellipsoid zinc silicate composite material more particularly to a kind of utilization iron tailings systems
The method of standby ellipsoid zinc silicate composite material, belongs to iron tailings deep processing and nanocomposite preparation technical field.
Background technique
Zinc silicate is found in 1829 earliest, is found by Armand L é vy in Moresnet and according to Netherlands state
The naming of king is " Willemite " (Annales des Mines (Paris) 4eme (s é rie/4), 1843,507-
520.).Since In Natural Silicate zinc ore reserves are limited, self-discovery is so far about zinc silicate synthesis and zinc silicate high value added utilization
Research Changxing does not wane.The study found that zinc silicate is usually formed three kinds of crystal forms, it is positive zinc silicate, smithsonite, lamella respectively without aluminium zinc
Saponite, wherein the thermal stability highest of positive zinc silicate, the concern being subject to are also most.
Positive zinc silicate research has been achieved with tremendous development, at present the positive silicic acid Zinc material of many different structures and pattern by
Report synthesis, such as Zn2SiO4Nano particle (Chemistry of Materials, 2015,27 (7): 2343-2349),
Zn2SiO4Nano wire (Journal of Crystal Growth, 2008,310 (18): 4185-4189), Zn2SiO4Nanotube
(Angewandte Chemie International Edition, 2010,49 (8): 1442-1446) etc..These materials are wide
It is general to be applied to the fields such as fluorescence, electroluminescent, coating, anti-corrosion, catalysis, wastewater treatment.However the zinc silicate preparation reported at present
It is related to complicated synthesis process, the higher silicon source of price (such as sodium metasilicate, TEOS, white carbon black), chemical reagent not environmentally more
(such as surfactant) uses, therefore studies simple and convenient, inexpensive mode and prepare positive silicic acid Zinc material and be necessary.
In recent years, researcher has found that the silicon source of silicic acid Zinc material can be obtained from some solid waste.Chinese patent
(CN104087289A) reporting a kind of using waste silicon powder, zinc acetate, manganese nitrate, sodium hydroxide and surfactant is that raw material closes
At the method for zinc silicate luminescent material.There are also many for solid waste containing abundant element silicon.Iron tailings is iron ore by choosing
Remaining solid waste after iron ore concentrate is taken, with SiO on composition2、Al2O3、Fe2O3, based on CaO, MgO etc., in mineral composition
Based on the gangue quartzs mineral such as quartz, chlorite, hornblend, feldspar, pyroxene, not only silica rich in, also universal grain
Degree is thinner, has the advantage prepared on zinc silicate material composition, on composition, and source is richer, cost is less expensive, is expected to make
The positive silicic acid Zinc material of high added value functionalization is constructed for silicon source.But due to iron tailings ingredient complicated composition, component is made each other
It is complicated with mechanism situation, cause in its concrete application, there is also many technical essentials to need to study and overcome.Iron tailings at present
Research and utilization is still constructed without the natural silicate complex mineral natural endowment characteristic for iron tailings high additional mostly for the purpose of environmental protection
It is worth the report of functional material, i.e., has no using iron tailings as the report of Material synthesis zinc silicate functional material, also do not have so far
Industrial applications precedent.
Summary of the invention
The purpose of the present invention is provide a kind of utilization iron tailings preparation ellipsoid silicon for deficiency present in current techniques
The method of sour zinc composite material.This method using iron tailings as silicon source, by abundant ball milling and alkali activation make its discharge silicate from
Son, then under thermal and hydric environment with Zn2+Ion is reacted to obtain ellipsoid zinc silicate composite material.The present invention can both solve China
Environmental problem caused by rich reserves, the iron tailings urgently utilized accumulation realizes that recycling, high added value functionalization utilize, again
New way can be provided for the preparation of zinc silicate.
The technical solution of the invention is as follows:
A method of ellipsoid zinc silicate compound adsorbent being prepared using iron tailings, method includes the following steps:
(1) miberal powder was obtained after iron tailings being milled to 300 mesh mesh screens, then miberal powder was added in aqueous slkali, was stirred
Obtain suspending liquid A；The content of miberal powder is 1~10% in suspension；The concentration of the aqueous slkali is 0.001~0.5mol/L.
(2) zinc salt dissolution is obtained into solution B in deionized water；The concentration of the zinc solution is 0.5~2.5mol/L.
(3) solution B is added in suspending liquid A, continues stirring with ultrasonic and obtains suspension C；The aqueous slkali and zinc salt are molten
The volume ratio of liquid is 1:1.
(4) suspension C is gone in hydrothermal reaction kettle, 4~36h is reacted under the conditions of 120~220 DEG C, naturally cools to room
Wen Hou, centrifugation, drying, are ground up, sieved to obtain linen ellipsoid zinc silicate composite material washing.
SiO in the iron tailings2Mass percentage 65%~90%.
The alkali be sodium carbonate, sodium hydroxide, sodium acetate, ammonium hydroxide, urea and sodium metasilicate one of or it is a variety of.
The zinc salt be zinc sulfate, zinc chloride, zinc nitrate and zinc acetate in one of or it is a variety of.
Molar ratio is zinc: silicon=10:1~1:1.
In the ratio, the amount of silicon is the mole of element silicon in iron tailings；Alternatively, when alkali is sodium metasilicate, silicon
Mole is the sum of the element silicon in element silicon and sodium metasilicate in iron tailings.
The beneficial effects of the present invention are:
Iron tailings is changed into ellipsoid zinc silicate composite material by hydro-thermal reaction by the present invention, which has apparent
Meso pore characteristics, aperture integrated distribution can adsorb completely the dyestuff in 100mg/L rhodamine B solution in 4nm or so in 30min
Molecule is expected to be applied to the absorption enrichment or removing of antibiotic, mycotoxin, dyestuff, heavy metal, at environment remediation, waste water
Reason, feed additive field have broad prospect of application.The present invention can provide new method for the preparation of zinc silicate, be China's reserves
Recycling, the high added value functionalization of the iron tailings enrich, urgently utilized, which utilize, opens up new way.
Detailed description of the invention
Fig. 1 is the XRD spectra that iron tailings and embodiment 1 prepare zinc silicate composite material.
Fig. 2 is the electromicroscopic photograph that iron tailings (Fig. 2 a) and embodiment 1 prepare zinc silicate composite material (Fig. 2 b).
Fig. 3 is the N that embodiment 1 prepares zinc silicate composite material2Absorption-desorption thermoisopleth.
Fig. 4 is the graph of pore diameter distribution that embodiment 1 prepares zinc silicate composite material.
Fig. 5 is that iron tailings and embodiment 1 prepare zinc silicate composite material to the UV- of 100mg/L rhodamine B absorption front and back
Vis spectrogram.
Specific embodiment
Technical solution of the invention is described further below with reference to embodiment, these embodiments should not be understood as
It is the limitation to technical solution.
The iron tailings is specially Tangshan iron tailings, SiO2Content is 65%~90%, and main object is mutually quartz, also
It containing a small amount of biotite, albite, microcline and clinochlore, is made of irregular particle, partial size is generally less than 50 μm.
Embodiment 1: the iron tailings powder that 300 mesh mesh screens are crossed after 2.0g ball milling (is contained into SiO2Mole be 0.03mol)
It is scattered in mixed base (0.0025mol) solution of 40mL sodium metasilicate containing 1.4g (0.0049mol), 0.1g sodium hydroxide, sufficiently
It stirs (2500r/min, 4h) and forms uniform suspension.Then it is gradually added into 40mL zinc acetate containing 6.6g (0.036mol) thereto
The aqueous solution of (molar ratio zinc: total silicon=1.03:1), continuing stirring (2000r/min, 2h) and ultrasonic (45min) keeps it sufficiently anti-
Uniform suspension should be formed.Then this suspension is transferred in the polytetrafluoroethylene (PTFE) hydro-thermal reaction tank of 100mL, is sealed, 140
12h is reacted at DEG C.To reactor tank cooled to room temperature, product is centrifugated and is sufficiently washed, drying is ground up, sieved
Linen ellipsoid zinc silicate composite material.
The composite material is in solid ellipsoid pattern, and partial size about 300nm, main object phase composition is quartz and positive zinc silicate, tool
There is meso-hole structure, thermoisopleth is IV type thermoisopleth, and aperture integrated distribution is in 4nm or so.The material can adsorb completely in 45min
Dye molecule in 100mg/L rhodamine B solution.(adsorpting data is by ITACHI U-3900H ultraviolet-visible spectrophotometer
Measurement)
Embodiment 2: the iron tailings powder that 300 mesh mesh screens are crossed after 2.0g ball milling (is contained into SiO2Mole be 0.027mol)
It is scattered in the mixed ammonium/alkali solutions of 40mL sodium metasilicate containing 1.4g (0.0049mol), 0.5g sodium acetate (0.006mol), is sufficiently stirred
(3500r/min, 4h) forms uniform suspension.Then be gradually added into thereto 40mL zinc acetate containing 6.6g (0.036mol),
The mixed aqueous solution of 1.2g zinc chloride (0.0088mol) (molar ratio zinc: total silicon=1.4:1), continue stirring (1500r/min,
It 2h) is reacted, which sufficiently, with ultrasonic (30min) forms uniform suspension.Then this suspension is transferred to the polytetrafluoro of 100mL
In ethylene hydro-thermal reaction tank, sealing reacts 5h at 180 DEG C.To reactor tank cooled to room temperature, simultaneously by product centrifuge separation
Sufficiently washing, drying are ground up, sieved to obtain linen ellipsoid zinc silicate composite material.The composite material is in solid elliposoidal
Looks, partial size about 350nm.The material can adsorb completely the dye molecule (adsorption number in 100mg/L rhodamine B solution in 60min
It is measured according to by ITACHI U-3900H ultraviolet-visible spectrophotometer).
Embodiment 3: the iron tailings powder that 300 mesh mesh screens are crossed after 1.0g ball milling (is contained into SiO2Mole be 0.012mol)
It is scattered in the aqueous slkali of 40mL sodium metasilicate containing 2.8g (0.0098mol), (2500r/min, 4h) is sufficiently stirred and forms uniform hang
Supernatant liquid.Then it is gradually added into the water-soluble of 40mL zinc sulfate containing 8.1g (0.050mol) (molar ratio zinc: total silicon=2.3:1) thereto
Liquid, continuing to stir (2000r/min, 1h) and ultrasound (20min) reacts it sufficiently to form uniform suspension.Then this is suspended
Liquid is transferred in the polytetrafluoroethylene (PTFE) hydro-thermal reaction tank of 100mL, and sealing is reacted for 24 hours at 120 DEG C.To reactor tank natural cooling
To room temperature, product is centrifugated and is sufficiently washed, drying is ground up, sieved to obtain linen ellipsoid zinc silicate composite material.
The composite material is in solid ellipsoid pattern, partial size about 320nm.It is molten that the material can adsorb completely 100mg/L rhodamine B in 40min
Dye molecule in liquid (adsorpting data is measured by ITACHI U-3900H ultraviolet-visible spectrophotometer).
Embodiment 4: the iron tailings powder that 300 mesh mesh screens are crossed after 4.0g ball milling (is contained into SiO2Mole be 0.05mol)
It is scattered in the mixed ammonium/alkali solutions of 40mL sodium acetate containing 1.5g (0.018mol), 0.1g urea (0.0017mol), is sufficiently stirred
(3000r/min, 4h) forms uniform suspension.Then be gradually added into thereto 40mL zinc nitrate containing 6.9g (0.023mol),
The mixed aqueous solution of 18.0g zinc sulfate (0.11mol) (molar ratio zinc: total silicon=2.66:1), continue stirring (1000r/min,
It 2h) is reacted, which sufficiently, with ultrasonic (1h) forms uniform suspension.Then this suspension is transferred to the polytetrafluoroethylene (PTFE) of 100mL
In hydro-thermal reaction tank, sealing reacts 12h at 160 DEG C.To reactor tank cooled to room temperature, product is centrifugated and is filled
Divide washing, drying is ground up, sieved to obtain linen ellipsoid zinc silicate composite material.The composite material is in solid ellipsoid pattern,
Partial size about 420nm.The material can 90min adsorb completely in 100mg/L rhodamine B solution dye molecule (adsorpting data by
ITACHI U-3900H ultraviolet-visible spectrophotometer measurement).
Embodiment 5: the iron tailings powder that 300 mesh mesh screens are crossed after 1.5g ball milling (is contained into SiO2Mole be 0.016mol)
It is scattered in the aqueous slkali of 40mL sodium carbonate containing 0.5g (0.0047mol), (3000r/min, 4h) is sufficiently stirred and forms uniform hang
Supernatant liquid.Then it is gradually added into 40mL zinc chloride containing 13.6g (0.1mol), 1.0g zinc nitrate (0.0034mol) (molar ratio thereto
Zinc: total silicon=6.46:1) mixed aqueous solution, continuing to stir (800r/min, 2h) and ultrasound (1h) makes it sufficiently react formation
Uniform suspension.Then this suspension is transferred in the polytetrafluoroethylene (PTFE) hydro-thermal reaction tank of 100mL, is sealed, it is anti-at 220 DEG C
Answer 4h.To reactor tank cooled to room temperature, product is centrifugated and is sufficiently washed, drying is ground up, sieved linen
Ellipsoid zinc silicate composite material.The composite material is in solid ellipsoid pattern, partial size about 400nm.The material can be complete in 60min
(adsorpting data is by ITACHI U-3900H spectrophotometry for dye molecule in absorption 100mg/L rhodamine B solution
Meter measurement).
Unaccomplished matter of the present invention is well-known technique.
Claims (5)
1. a kind of method using iron tailings preparation ellipsoid zinc silicate compound adsorbent, it is characterized in that this method includes following step
It is rapid:
(1) miberal powder was obtained after iron tailings being milled to 300 mesh mesh screens, then miberal powder was added in aqueous slkali, stirs outstanding
Supernatant liquid A；The content of miberal powder is 1 ~ 10% in suspension；The concentration of the aqueous slkali is 0.001 ~ 0.5 mol/L；
(2) zinc salt dissolution is obtained into solution B in deionized water；The concentration of the zinc solution is 0.5 ~ 2.5 mol/L；
(3) solution B is added in suspending liquid A, continues stirring with ultrasonic and obtains suspension C；The aqueous slkali and zinc solution
Volume ratio is 1:1；
(4) suspension C is gone in hydrothermal reaction kettle, 4 ~ 36 h of reaction under the conditions of 120 ~ 220 DEG C, after cooled to room temperature,
Centrifugation, drying, is ground up, sieved to obtain linen ellipsoid zinc silicate composite material washing.
2. as described in claim 1 using the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent, it is characterized in that institute
State the SiO in iron tailings2Mass percentage 65% ~ 90%.
3. as described in claim 1 using the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent, it is characterized in that institute
State alkali be sodium carbonate, sodium hydroxide, sodium acetate, ammonium hydroxide, urea and sodium metasilicate one of or it is a variety of.
4. as described in claim 1 using the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent, it is characterized in that institute
State zinc salt be zinc sulfate, zinc chloride, zinc nitrate and zinc acetate in one of or it is a variety of.
5. as described in claim 1 using the method for iron tailings preparation ellipsoid zinc silicate compound adsorbent, it is characterized in that institute
Stating molar ratio is zinc: silicon=10:1 ~ 1:1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408945A (en) * | 2020-11-27 | 2021-02-26 | 南京理工大学 | Iron tailing baked brick and preparation method thereof |
| CN112552023A (en) * | 2020-11-27 | 2021-03-26 | 南京理工大学 | Iron tailing sintered ceramsite and preparation method thereof |
| CN113578257A (en) * | 2021-07-20 | 2021-11-02 | 中国地质科学院矿产资源研究所 | Iron tailing composite material and preparation method and application thereof |
| GB2619395A (en) * | 2022-04-29 | 2023-12-06 | Johnson Matthey Plc | Stabilised zinc oxide materials |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0165647A2 (en) * | 1984-06-22 | 1985-12-27 | Mizusawa Industrial Chemicals Ltd. | Process for preparation of synthetic crystalline zinc silicate mineral |
| CN101920970A (en) * | 2010-02-10 | 2010-12-22 | 清华大学 | Preparation method of silicate nano hollow structure material |
| CN102863011A (en) * | 2012-09-25 | 2013-01-09 | 四川巨宏科技有限公司 | Method of using low-grade zinc oxide ore to produce high-purity nano zinc oxide by means of ammonia process |
| CN102976344A (en) * | 2012-12-29 | 2013-03-20 | 石家庄学院 | Preparation method of zinc silicate nanometer material |
| US20180134569A1 (en) * | 2016-11-16 | 2018-05-17 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Synthesis of Nanostructured Zinc Silicate from Renewable Sources |
-
2019
- 2019-04-04 CN CN201910269556.3A patent/CN109796021B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0165647A2 (en) * | 1984-06-22 | 1985-12-27 | Mizusawa Industrial Chemicals Ltd. | Process for preparation of synthetic crystalline zinc silicate mineral |
| CN101920970A (en) * | 2010-02-10 | 2010-12-22 | 清华大学 | Preparation method of silicate nano hollow structure material |
| CN102863011A (en) * | 2012-09-25 | 2013-01-09 | 四川巨宏科技有限公司 | Method of using low-grade zinc oxide ore to produce high-purity nano zinc oxide by means of ammonia process |
| CN102976344A (en) * | 2012-12-29 | 2013-03-20 | 石家庄学院 | Preparation method of zinc silicate nanometer material |
| US20180134569A1 (en) * | 2016-11-16 | 2018-05-17 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Synthesis of Nanostructured Zinc Silicate from Renewable Sources |
Non-Patent Citations (1)
| Title |
|---|
| 吕扬: "铁尾矿为原料制备介孔分子筛", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408945A (en) * | 2020-11-27 | 2021-02-26 | 南京理工大学 | Iron tailing baked brick and preparation method thereof |
| CN112552023A (en) * | 2020-11-27 | 2021-03-26 | 南京理工大学 | Iron tailing sintered ceramsite and preparation method thereof |
| CN113578257A (en) * | 2021-07-20 | 2021-11-02 | 中国地质科学院矿产资源研究所 | Iron tailing composite material and preparation method and application thereof |
| CN113578257B (en) * | 2021-07-20 | 2023-10-31 | 中国地质科学院矿产资源研究所 | Iron tailing composite material and preparation method and application thereof |
| GB2619395A (en) * | 2022-04-29 | 2023-12-06 | Johnson Matthey Plc | Stabilised zinc oxide materials |
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