CN103920457B - Bayer process red mud is utilized to prepare the method for ground polymers sorbing material - Google Patents
Bayer process red mud is utilized to prepare the method for ground polymers sorbing material Download PDFInfo
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- CN103920457B CN103920457B CN201410107726.5A CN201410107726A CN103920457B CN 103920457 B CN103920457 B CN 103920457B CN 201410107726 A CN201410107726 A CN 201410107726A CN 103920457 B CN103920457 B CN 103920457B
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Abstract
The invention discloses a kind of method utilizing Bayer process red mud to prepare ground polymers sorbing material.Kaolin and red mud are dried respectively, kaolin calcined rear ball milling, red mud is ball milling also, then red mud and calcined kaolin are mixed with mass ratio 3:7 ~ 6:4, be placed in agitated kettle, add modulus be 1.5 water glass solution stir evenly, make sodium oxide molybdena quality in water glass solution be 8% of calcined kaolin and red mud mixture gross mass, slurry water gray scale 0.35 ~ 0.38; Get appropriate aluminium powder and soap powder puts into a small amount of water, add after being uniformly dispersed in above-mentioned gained slurry, then stir; Wait for after 3 ~ 5 minutes, by die-filling for the slurry expanded, band mould puts in an oven or baking oven maintenance is put in the demoulding, i.e. obtained ground polymers sorbing material.The inventive method process equipment is simple, with low cost, easily promotes, affected by environment little, and the ground polymer material pore made is even, intensity is higher, can reuse after acid solution process.
Description
Technical field
The invention belongs to technical field of inorganic non-metal material preparation, particularly a kind of method utilizing Bayer process red mud to prepare ground polymers sorbing material.
Background technology
Ground polymer material is different from portland cement completely in mineral composition, and it is made up of gel mineral, and its primary raw material is high-activity metakaolin; Alkaline activating agent (caustic potash, caustic soda, waterglass, potassium silicate etc.); Accelerator for hardening (calcium silicates of low calcium silicon ratio and silicon ash etc., be amorphous state); Additive (being mainly set retarder).After entering the nineties, the range of choice of raw material and activator is widened greatly, and sial raw material sources expand to volcano zeolite, flyash, mineral waste, the large class of burnedc lay four; Activator is expanded to oxide, halide, organic component etc. made activator by single alkali metal, alkaline-earth metal, hydroxide, stir shaping through preparing burden, mixing, add water, and within a certain period of time by a class Inorganic Non-metallic Materials of aquation polymerization, dehydration sclerosis formation.
Emerged both at home and abroad in recent years in a large number about the patent of ground polymers, but few about the patent of ground polymers sorbing material.The patent No. is 200910114099, publication number is the Chinese patent of 101560071, discloses a kind of porous material of phosphate-based geopolymer and preparation method thereof, adds cost because adding more aluminium oxide, and it lacks efficient adsorbing medium, adsorption efficiency remains to be discussed; The patent No. is 200710200202.0, publication number is the Chinese patent of CN101053826, disclose a kind of Geololymer absorbant and preparation method thereof, this preparation method operation is more complicated, and a large amount of adsorbing mediums need be added as zeolite, active carbon, NACF, silica gel, activated alumina etc., cost is very high, is not suitable for the process of trade effluent.
Red mud is that bauxite leaches through highly basic the slag produced after aluminium oxide, and is take seabed or land to stack to the processing mode that red mud is main.Along with the fast development of aluminum smelting industry, producing the red mud amount that aluminium oxide discharges also increases day by day, stores up the series of problems that disposal brings day by day serious, causes serious environmental problem.At present construction material be mainly used for the improvement of red mud and therefrom extract utility, through lot of experiments research work, the application of red mud from sintering process in construction material has entered the large-scale production stage, and have accumulated the knowhow of decades, and the comprehensive utilization of Bayer process red mud there is no substantial progress.
Have its Adsorption of Heavy Metal Ions ability of many scholar's research in recent years about Bayer process red mud, all obtain ideal experimental result, and the foaming of porous ground copolymer matrix also has good fixing heavy metal ion ability.Red mud is in ground polymer configurations, except participating in except geopolymeric reaction on a small quantity, main still as filler, so have a large amount of red mud particle in ground polymers, and can as good adsorbing medium.Waterglass exciting agent has stronger alkalescence, and easy and aluminium powder reacts and produces a large amount of bubble, make the material prepared have loose structure, and porous ground copolymer matrix has good fixing heavy metal ion ability.Bayer process red mud and ground polymers porous matrix effectively combine by the present invention, obtain ideal effect.
Summary of the invention
The object of this invention is to provide a kind of method utilizing Bayer process red mud to prepare ground polymers sorbing material.The method utilizes Bayer process red mud to make the ground polymers sorbing material of high-efficiency and low-cost environment-friendly type, and can apply to the process containing heavy metal ion industrial wastewater in a large number, reduces red mud piling up land occupation resource, turns waste into wealth, reduce environmental pollution.
Concrete steps are:
(1) first kaolin and Bayer process red mud are dried respectively to moisture content and be less than 1%, then kaolin being milled to specific area 800 DEG C of calcinings after 6 hours is 800 ± 1m
2/ Kg, Bayer process red mud being milled to specific area is 400 ± 1m
2/ Kg.
(2) calcined kaolin that Bayer process red mud step (1) processed and step (1) processed mixes for 3:7 ~ 6:4 in mass ratio.
(3) utilize chemical pure NaOH that the industrial waterglass of high mode is adjusted to the water glass solution that modulus is 1.5.
(4) mixture that step (2) is obtained is placed in agitated kettle, the modulus adding a certain amount of step (3) more obtained is the water glass solution of 1.5, the sodium oxide molybdena quality in water glass solution is made to be 8% of the mixture gross mass that step (2) obtains, slurry water gray scale is 0.35 ~ 0.38, stirs.
(5) aluminium powder accounting for the obtained mixture gross mass 0.03 ~ 0.08wt% of step (2) is got, a small amount of water put into by the anion surfactant accounting for the obtained mixture gross mass 0.002 ~ 0.005wt% of step (2), add in step (4) gained slurry after being uniformly dispersed, stir again, then 3 ~ 5 minutes are waited for, by die-filling for the slurry expanded, put into maintenance 5 ~ 7 hours or the shaping rear demoulding of room temperature maintenance under the baking oven vacuum condition of 60 ~ 80 DEG C with mould and to put under the baking oven vacuum condition of 50 ± 5 DEG C maintenance 36 ~ 72 hours, i.e. obtained ground polymers sorbing material.
Described anion surfactant is soap powder.
The inventive method technique is simple, need equipment few, Bayer process red mud can be processed in a large number, with low cost, replicability is strong, affected by environment little, the ground polymer material made can do the sorbing material of heavy metal wastewater thereby, be that one turns waste into wealth effective method, the ground polymers sorbing material pore that the inventive method is obtained in addition evenly, intensity is higher, can reuse after acid solution process.
Detailed description of the invention
Following examples Bayer process red mud material collection used is from Aluminum Co., Ltd of Guangxi pingguo.
Embodiment 1:
(1) first kaolin and Bayer process red mud being dried to moisture content is respectively 0.8%, and then kaolin being milled to specific area 800 DEG C of calcinings after 6 hours is 800m
2/ Kg, Bayer process red mud being milled to specific area is 400m
2/ Kg.
(2) calcined kaolin that Bayer process red mud step (1) processed and step (1) processed is in mass ratio for 3:7 mixes.
(3) utilize chemical pure NaOH that the industrial waterglass of high mode is adjusted to the water glass solution that modulus is 1.5.
(4) mixture that step (2) is obtained is placed in agitated kettle, the modulus adding a certain amount of step (3) more obtained is the water glass solution of 1.5, the sodium oxide molybdena quality in water glass solution is made to be 8% of the mixture gross mass that step (2) obtains, slurry water gray scale is 0.36, stirs.
(5) get the aluminium powder accounting for the obtained mixture gross mass 0.05wt% of step (2), the anion surfactant (soap powder) accounting for the obtained mixture gross mass 0.004wt% of step (2) puts into a small amount of water, add in step (4) gained slurry after being uniformly dispersed, stir again, then 4 minutes are waited for, by die-filling for the slurry expanded, the shaping rear demoulding of room temperature maintenance, 50 DEG C of baking oven maintenances 48 hours are put into, i.e. obtained ground polymers sorbing material after gained test block parcel preservative film.
Embodiment 2:
(1) first kaolin and Bayer process red mud being dried to moisture content is respectively 0.5%, and then kaolin being milled to specific area 800 DEG C of calcinings after 6 hours is 800m
2/ Kg, Bayer process red mud being milled to specific area is 400m
2/ Kg.
(2) calcined kaolin that Bayer process red mud step (1) processed and step (1) processed is in mass ratio for 1:1 mixes.
(3) utilize chemical pure NaOH that the industrial waterglass of high mode is adjusted to the water glass solution that modulus is 1.5.
(4) mixture that step (2) is obtained is placed in agitated kettle, the modulus adding a certain amount of step (3) more obtained is the water glass solution of 1.5, the sodium oxide molybdena quality in water glass solution is made to be 8% of the mixture gross mass that step (2) obtains, slurry water gray scale is 0.36, stirs.
(5) get the aluminium powder accounting for the obtained mixture gross mass 0.06wt% of step (2), the anion surfactant (soap powder) accounting for the obtained mixture gross mass 0.003wt% of step (2) puts into a small amount of water, add in step (4) gained slurry after being uniformly dispersed, stir again, then 4 minutes are waited for, by die-filling for the slurry expanded, then wrap polybag tighten rear band mould put into the baking oven vacuum condition of 70 DEG C under maintenance take out after 6 hours, the demoulding, i.e. obtained ground polymers sorbing material.
Ground polymers sorbing material compression strength obtained by above embodiment is stabilized in 2 ~ 5MPa, the porosity is 30 ~ 70%, and bulk density is at 0.6 ~ 1.4g/m
3, adsorption efficiency is high, to industrial wastewater, copper, chromium, cadmium plasma adsorption efficiency more than 99.9%, and can reuse repeatedly after the process of finite concentration acid solution.
Claims (1)
1. utilize Bayer process red mud to prepare a method for ground polymers sorbing material, it is characterized in that concrete steps are:
(1) first kaolin and Bayer process red mud are dried respectively to moisture content and be less than 1%, then kaolin being milled to specific area 800 DEG C of calcinings after 6 hours is 800 ± 1m
2/ Kg, Bayer process red mud being milled to specific area is 400 ± 1m
2/ Kg;
(2) calcined kaolin that Bayer process red mud step (1) processed and step (1) processed mixes for 3:7 ~ 6:4 in mass ratio;
(3) utilize chemical pure NaOH that the industrial waterglass of high mode is adjusted to the water glass solution that modulus is 1.5;
(4) mixture that step (2) is obtained is placed in agitated kettle, the modulus adding a certain amount of step (3) more obtained is the water glass solution of 1.5, the sodium oxide molybdena quality in water glass solution is made to be 8% of the mixture gross mass that step (2) obtains, slurry water gray scale is 0.35 ~ 0.38, stirs;
(5) aluminium powder accounting for the obtained mixture gross mass 0.03 ~ 0.08wt% of step (2) is got, a small amount of water put into by the anion surfactant accounting for the obtained mixture gross mass 0.002 ~ 0.005wt% of step (2), add in step (4) gained slurry after being uniformly dispersed, stir again, then 3 ~ 5 minutes are waited for, by die-filling for the slurry expanded, band mould is put into maintenance 5 ~ 7 hours or the shaping rear demoulding of room temperature maintenance under the baking oven vacuum condition of 60 ~ 80 DEG C and to be put under the baking oven vacuum condition of 50 ± 5 DEG C maintenance 36 ~ 72 hours, i.e. obtained ground polymers sorbing material,
Described anion surfactant is soap powder.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105289462A (en) * | 2015-10-20 | 2016-02-03 | 山东建筑大学 | Light porous red mud based inorganic polymer medium having metal ion adsorption performance |
| CN105753342B (en) * | 2016-01-31 | 2017-09-29 | 西安建筑科技大学 | The preparation of electrical conductivity controllable alkali-activated carbonatite red mud base semiconductor binder materials |
| CN106467378B (en) * | 2016-09-05 | 2019-07-26 | 广西大学 | A kind of synthetic method of high effective green environmentally friendly filter membrane |
| CN106423112B (en) * | 2016-10-18 | 2020-02-18 | 青岛大学 | Heavy metal ion adsorbent and preparation method thereof |
| CN106905724A (en) * | 2017-02-27 | 2017-06-30 | 广西大学 | A kind of synthetic method of red mud based high-temp-resistant inorganic coating |
| CN108863283A (en) * | 2018-07-19 | 2018-11-23 | 广东佳纳能源科技有限公司 | Waste residue base porous compound material and its preparation method and application for wastewater treatment |
| US11602728B2 (en) * | 2019-03-01 | 2023-03-14 | NOVOREACH Technologies LLC | Composite adsorbents and method of making them |
| CN109847726B (en) * | 2019-03-05 | 2022-03-25 | 西南科技大学 | Preparation method of cesium adsorption enrichment filter element |
| CN110357506A (en) * | 2019-07-30 | 2019-10-22 | 佛山市津明建筑科技有限公司 | A kind of red mud-metakaolin compound ground oligomer gel material and preparation method thereof |
| CN110776045B (en) * | 2019-11-12 | 2022-04-26 | 常熟理工学院 | Preparation method of tuff-based permeable reactive barrier |
| CN110803890B (en) * | 2019-11-19 | 2020-10-23 | 太原理工大学 | High-red-mud-content geopolymer and preparation method thereof |
| CN111217562A (en) * | 2020-02-28 | 2020-06-02 | 山东大学 | Red mud-based sewage treatment agent and preparation method thereof, red mud-based ceramsite concrete and preparation method and application thereof |
| CN113511846A (en) * | 2021-05-11 | 2021-10-19 | 昆明理工大学 | Method for solidifying arsenic by using red mud-metakaolin-based multi-element solid waste geopolymer |
| CN114345296B (en) * | 2021-12-28 | 2023-06-30 | 淮阴工学院 | Preparation method of magnetic activated carbon-red mud composite adsorbent |
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Effective date of registration: 20210106 Address after: 221000 north side of Taizhou Road, Peixian Economic Development Zone, Xuzhou City, Jiangsu Province Patentee after: XUZHHOU XINGHAO MUSICAL INSTRUMENT Co.,Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Guilin Construction Road No. 12 Patentee before: GUILIN University OF TECHNOLOGY |
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