CN104591569B - A kind of synthetic method of red mud base geological polymer - Google Patents
A kind of synthetic method of red mud base geological polymer Download PDFInfo
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- CN104591569B CN104591569B CN201410852001.9A CN201410852001A CN104591569B CN 104591569 B CN104591569 B CN 104591569B CN 201410852001 A CN201410852001 A CN 201410852001A CN 104591569 B CN104591569 B CN 104591569B
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- red mud
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
A kind of synthetic method of geo-polymer, main technical schemes are：Calcining red mud, metakaolin is taken to be reacted after adding the polishing fluid mixing of failure phosphate, reaction terminates up to product.A kind of synthetic method of porous geological polymer of the present invention, this method by the use of failure phosphate polishing fluid be used as exciting agent, metakaolin is adjuvant, reacts synthesis porous geological polymer with red mud, synthesized porous geological polymer is had advantages of higher compressive strength and adsorptivity.Using phosphate polishing fluid and the red mud synthesis porous geological polymeric material of failing, while the effect of environmental protection can be reached, reduce cost, reduce pollution.
Description
Technical field
The present invention relates to a kind of synthetic method of inorganic polymeric material, more particularly to a kind of red mud Quito hole red mud base matter
The synthetic method of polymer.
Background technology
Geo-polymer (Geopolymer) is to study one of very active nonmetallic materials in the world in recent years.It is
Using clay, industrial residue or slag as primary raw material, alkali or acid are exciting agent, through appropriate process, in lower temperature bar
By chemically reacting obtained a kind of Novel Inorganic Polymers material under part.The material is that new development in recent years is got up, have can
Cement can be replaced in many occasions, and have the new material than cement more excellent properties.Geo-polymer is high, hard with intensity
Change fast, acid-alkali-corrosive-resisting etc. and be better than the special performance of Portland cement, while there is material to enrich, is cheap, save
The advantages that energy, causes the great interest of domestic and international materials specialist.
Famous theory alkali-aggregate reaction is also alkali pasc reaction, refer in the alkaline matter and aggregate in concrete activity into
Distribute biochemical reaction, the phenomenon for causing inside concrete self-expanding stress and cracking.Alkali-aggregate reaction gives concrete works band
The harm come is quite serious.The ground polymer material more than 95% studied at present is all to be polymerized by alkali as exciting agent.
Excite synthesis geology polymer material cost higher with alkaline matter, and the presence of alkali-activator easily produces synthetic material
" alkali-aggregate reaction ", causes synthetic material cracking and intensity to decline.The ground polymer material of acid excitation synthesis has good resistance to compression
With the performance such as resistance to chemical corrosion, construction material, pipeline, insulating materials etc. can be made.But using acid as exciting agent synthetically at present
The research of matter polymer is seldom, has a small amount of pertinent literature to show, someone is used as exciting agent and ore deposit using concentrated hydrochloric acid or sulfuric acid
Slag is reacted, and geo-polymer is made.Hydrochloric acid, sulfuric acid are all strong acid, expensive, so that cost of manufacture is high, and
High concentrated acid is dangerous in operation, is unfavorable for industrial production.
The pollution waste residue that red mud is discharged when being aluminium industry extraction aluminium oxide, average often produces 1 ton of aluminium oxide, attached
Band produces 1.0~2.0 tons of red muds.China is used as the 4th big alumina producing state of the world, and the red mud discharged every year is up to millions of
Ton.Substantial amounts of red mud sufficiently effective cannot utilize, and the stockyard of large area can only be relied on to stack, occupy a large amount of soils, also right
Environment causes serious pollution.About 70,000,000 tons of the red mud that the whole world produces every year, the red mud that China produces every year are 3000
More than ten thousand tons.The generation production to the mankind, the life of substantial amounts of red mud cause many influences directly or indirectly.By
It is difficult to remove in the chemical bases that red mud combines and content is big, and containing reasons such as a variety of acrobatics such as fluorine, for the innoxious of red mud
It is difficult to always using utilizing.Comprehensive utilization of the countries in the world expert to red mud has carried out substantial amounts of scientific research, but such
Progress is little.Therefore, waste red mud residues processing and comprehensive utilization become a global hang-up.
Polishing fluid is to be used for the liquid that aluminium material surface polishes and generates oxide-film during aluminium product, generally by a kind of or
Several strong acid, middle strong acid mix.Polishing fluid is after being used for multiple times, and the metal ion such as aluminium in its liquid is built up, most
Polishing and oxidation are lost eventually, are referred to as failed.Phosphate polishing fluid is usually concentrated phosphoric acid by 85%, 10% concentrated sulfuric acid
Concentrated nitric acid with 5% mixes, concentrated phosphoric acid of the failure sulfate polishing fluid containing about 85%, 10% concentrated sulfuric acid, 5% dense nitre
Acid and 0.7% aluminium ion and other impurities.In aluminium product enterprise, the processing to the polishing fluid that fails is generally to add stone
Ash discharges after neutralizing acid, costly, not only wastes resource, but also have seriously polluted the environment.
The content of the invention
The present invention is directed to technical problem set forth above, invents a kind of synthesis of red mud Quito hole red mud base geological polymer
Method, for this method by the use of failure phosphate polishing fluid as exciting agent, metakaolin is adjuvant, reacts and is synthesized porously with red mud
Matter polymer, makes synthesized porous geological polymer have advantages of higher compressive strength and adsorptivity.Utilize phosphate polishing of failing
Liquid and red mud synthesis porous geological polymeric material, while the effect of environmental protection can be reached, cost is reduced, reduces pollution.
Technical solution of the present invention is as follows：
A kind of synthetic method of porous red mud base geological polymer, main technical schemes are：Take calcining red mud, metakaolin
Reacted after adding the polishing fluid mixing of failure phosphate, reaction terminates up to product, and wherein metakaolin is adjuvant.
Wherein, the failure phosphate polishing fluid dosage is calcine red mud quality 0.7-1.1 times.
Wherein, the metakaolin dosage is calcine red mud quality 0.1-0.4 times.
Wherein, the reaction condition of the reaction is to be reacted 2-3 days at 40-80 DEG C.
Wherein, gained sample is conserved 5-10 days after reaction.
Wherein, the maintenance is gained sample will demould and be put into sealed plastic bag and be placed in and react after reaction
In the environment of same temperature.
Wherein, the calcining red mud is to be made after red mud is heated to 400~900 DEG C of 1~2h of calcining；The higher ridge
Soil is that kaolin is heated to 400~900 DEG C and keeps 1~2h, is made after cooling.
Metakaolin is made for kaolin through high-temperature calcination dehydration, and silicon and aluminium have necessarily in metakaolin after calcining
Activity, make it participate in reaction.
Using red mud as predecessor, through calcining and activating, make the red mud after calcining that there is certain activity, and with the phosphate that fails
Polishing fluid reaction is exciting agent, and metakaolin is adjuvant, synthesizes a kind of porosity geological polymeric material with higher-strength.
Compared with prior art, beneficial effects of the present invention：
The present invention is using the phosphate polishing fluid that fails as the exciting agent of synthesis geo-polymer, supplemented by a small amount of metakaolin
Auxiliary agent, the phosphoric acid contained in it, sulfuric acid and nitric acid are strong acid, with red mud react synthesis geo-polymer when, can with red mud and
Depolymerization --- aggregation occurs for activated silica, aluminium in higher ridge, and the aluminium in the phosphate polishing fluid that fails can be obviously promoted solution
It is poly- --- the progress of aggregation, when reaction synthesizes geo-polymer, formation has SiO4And AlO4The three of tetrahedron random distribution
Dimensional network structure is tieed up, alkali or alkaline earth metal ion distribution, to balance electricity price, is formed with higher between network hole
Compression strength and the porous geological polymeric material of preferable suction-operated.Further, using failure phosphate polishing fluid and red
Mud synthesizes porous geological polymeric material, realizes discarded object recycling, not only environmental protection, but also it is porous to significantly reduce production
The cost of geological polymeric material；The present invention is easily operated, and technological process is succinct.
Embodiment
The present invention is further described referring to embodiment, to make those skilled in the art with reference to specification text
Word can be implemented according to this, and the scope of the present invention is not limited to embodiments of the present invention.Mistake used in the embodiment of the present invention
Effect phosphate polishing fluid is all that the trans-oceanic Chemical Group company in Guangxi provides, failure phosphate polishing fluid contain about 78% phosphoric acid,
8% sulfuric acid and 3 nitric acid and 11% water and other impurities.
Embodiment 1
The kaolin of the red mud of 100g and 100g is respectively put into Muffle furnace and is heated to 800 DEG C and keeps the temperature 2h, after cooling
Obtain calcining red mud and metakaolin.The calcining red mud of 24g is weighed, adds 6g metakaolins, is mixed, then adds 21g
Fail phosphate polishing fluid, injects mould after stirring evenly, vibrates to discharge the air in reactant, is put into 40 DEG C of insulating boxs
Reaction, keeps temperature to be reacted 3 days for 40 DEG C, demoulds after reaction, it is 9MPa to measure sample compression strength.Sample is put into modeling
Expect in hermetic bag, conserved in 40 DEG C of insulating boxs, conserved 10 days, measure the porous geological that its compression strength is 12MPa at this time and gather
Condensation material.
Embodiment 2
The red mud of 100g and 100g kaolin are respectively put into Muffle furnace and is heated to 900 DEG C and keeps the temperature 1h, after cooling
To calcining red mud and metakaolin.The calcining red mud of 24g is weighed, adds 2.4g metakaolins, is mixed, then adds
26.8g failure phosphate polishing fluids, inject mould after stirring evenly, vibrate to discharge the air in reactant, be put into 70 DEG C of perseverances
Reacted in incubator, keep temperature to be reacted 2 days for 70 DEG C, demould after reaction, it is 10.3MPa to measure sample compression strength.Will
Sample is put into plastic sealing bag, is conserved in 70 DEG C of insulating boxs, is conserved 7 days, and it is 13.6MPa's to measure its compression strength at this time
Porous geological polymeric material.
Embodiment 3
The red mud of 100g and 100g kaolin are respectively put into Muffle furnace and is heated to 700 DEG C and keeps the temperature 2h, after cooling
To calcining red mud and metakaolin.The calcining red mud of 24g is weighed, adds 9.6g metakaolins, is mixed, then adds
16.8g failure phosphate polishing fluids, inject mould after stirring evenly, vibrate to discharge the air in reactant, be put into 80 DEG C of perseverances
Reacted in incubator, keep temperature to be reacted 2 days for 80 DEG C, demould after reaction, it is 12.6MPa to measure sample compression strength.Will
Sample is put into plastic sealing bag, is conserved in 80 DEG C of insulating boxs, is conserved 5 days, and it is 16.3MPa's to measure its compression strength at this time
Porous geological polymeric material.
The present invention is using the phosphate polishing fluid that fails as the exciting agent of synthesis geo-polymer, supplemented by a small amount of metakaolin
Auxiliary agent, the phosphoric acid contained in it, sulfuric acid and nitric acid are strong acid, with red mud react synthesis geo-polymer when, can with red mud and
Depolymerization --- aggregation occurs for activated silica, aluminium in higher ridge, and the aluminium in the phosphate polishing fluid that fails can be obviously promoted solution
It is poly- --- the progress of aggregation, when reaction synthesizes geo-polymer, formation has SiO4And AlO4The three of tetrahedron random distribution
Dimensional network structure is tieed up, alkali or alkaline earth metal ion distribution, to balance electricity price, is formed with higher between network hole
Compression strength and the porous geological polymeric material of preferable suction-operated.Further, using failure phosphate polishing fluid and red
Mud synthesizes porous geological polymeric material, realizes discarded object recycling, not only environmental protection, but also it is porous to significantly reduce production
The cost of geological polymeric material；The present invention is easily operated, and technological process is succinct.
Claims (4)
- A kind of 1. synthetic method of red mud base geological polymer, it is characterised in that：Calcining red mud, metakaolin is taken to add failure phosphorus Reacted after the mixing of acidic group polishing fluid, reaction terminates up to product；Wherein, the failure phosphate polishing fluid dosage is calcining 0.7-1.1 times of red mud quality, the metakaolin dosage are 0.1-0.4 times of calcining red mud quality, the reaction of the reaction Condition is to be reacted 2-3 days at 40-80 DEG C.
- 2. the synthetic method of red mud base geological polymer according to claim 1, it is characterised in that：After reaction by gained Sample conserves 5-10 days.
- 3. the synthetic method of red mud base geological polymer according to claim 2, it is characterised in that：The maintenance is will be anti- Gained sample is demoulded and is put into and is placed in sealed plastic bag in the environment with reacting same temperature after answering.
- 4. the synthetic method of red mud base geological polymer according to claim 1, it is characterised in that：The calcining red mud is will Red mud is made after being heated to 400~900 DEG C of 1~2h of calcining；The metakaolin is that kaolin is heated to 400~900 DEG C And 1~2h is kept, it is made after cooling.
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| 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 |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560071A (en) * | 2009-05-26 | 2009-10-21 | 广西大学 | Porous material of phosphate-based geopolymer and preparation method thereof |
| CN103864322A (en) * | 2014-01-17 | 2014-06-18 | 广西大学 | Synthetic method of geopolymer |
| CN103964710A (en) * | 2014-04-21 | 2014-08-06 | 华中科技大学 | Method for producing geopolymer binding material by red mud and geopolymer binding material |
| CN104150792A (en) * | 2014-08-09 | 2014-11-19 | 桂林理工大学 | Geopolymer cementitious material and preparation method thereof |
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2014
- 2014-12-31 CN CN201410852001.9A patent/CN104591569B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560071A (en) * | 2009-05-26 | 2009-10-21 | 广西大学 | Porous material of phosphate-based geopolymer and preparation method thereof |
| CN103864322A (en) * | 2014-01-17 | 2014-06-18 | 广西大学 | Synthetic method of geopolymer |
| CN103964710A (en) * | 2014-04-21 | 2014-08-06 | 华中科技大学 | Method for producing geopolymer binding material by red mud and geopolymer binding material |
| CN104150792A (en) * | 2014-08-09 | 2014-11-19 | 桂林理工大学 | Geopolymer cementitious material and preparation method thereof |
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