CN102167338A - Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization - Google Patents
Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization Download PDFInfo
- Publication number
- CN102167338A CN102167338A CN 201010114787 CN201010114787A CN102167338A CN 102167338 A CN102167338 A CN 102167338A CN 201010114787 CN201010114787 CN 201010114787 CN 201010114787 A CN201010114787 A CN 201010114787A CN 102167338 A CN102167338 A CN 102167338A
- Authority
- CN
- China
- Prior art keywords
- technology
- coal gangue
- silicon
- alkali
- aluminum silicate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization, and the technology provided by the invention comprises a high-alumina coal gangue alkali soluble desiliconization technology and a high-alumina fly ash alkali soluble desiliconization technology. The high-alumina coal gangue is activated in a roasting way and is leached by alkali liquor, solid-liquid separation is carried out, and the filter liquor is sodium silicate solution which can be used for preparing an inorganic silicon compound; and a filter cake is a hydrated sodium aluminosilicate material which can be used as a raw material for producing aluminum oxide. The high-alumina fly ash can be formed at a high temperature, the activating working procedure in a roasting way can be omitted, and the alkali soluble desiliconization can be directly performed. The technology is characterized in that the technical process is simple, the obtained hydrated sodium aluminosilicate material is taken as the raw material for producing the aluminum oxide, the hydrated sodium aluminosilicate is higher in aluminum-silicon mass ratio and higher in sodium oxide mass fraction, the alkali matching quantity and the silicon-calcium tailings discharging quantity of the process for preparing the aluminum oxide by utilizing the high-alumina coal gangue or the high-alumina fly ash can be obviously reduced, and the economic benefit of the technical process for preparing the aluminum oxide by utilizing the high-alumina coal gangue or the high-alumina fly ash can be improved.
Description
Technical field
The present invention relates to the field of a kind of high alumina coal gangue, aluminous fly-ash extraction aluminum oxide, specifically relate to the technology that a kind of high alumina coal gangue and aluminous fly-ash alkali solution-off silicon prepare hydrated aluminum silicate.
Background technology
Coal in China and power industry have been discharged a large amount of solid waste in producing, and wherein high alumina coal gangue, aluminous fly-ash occupy very big ratio.The stacking of these wastes not only influences face of land view, and environment is caused serious harm.At present, utilize aluminous fly-ash, high alumina coal gangue to prepare aluminum oxide and become one of focus of this type of reclamation of solid wastes utilization.Existing preparation technology or just produce wherein aluminum oxide simply, and other components in the material are directly discarded or other compositions are made low value-added products such as cement, be that 91110937.4,94113062.2,02107204.3,02116060.0,200810051316.8,200810183520.5 and 200810034212.6 patented technology comes to this such as application number; Though be exactly the SiO that in the preparation aluminum oxide, incites somebody to action wherein again
2Component is made products such as white carbon black, is difficult to promote but complex process and long flow path, cost are high, and such as application number 200510088308.7 patent of invention.Application number is that 200510052016.8 the disclosed technical scheme of patent of invention " a kind of coal gangue utilizes novel method " is, calcining coal gangue and sodium hydroxide High Temperature High Pressure stirring reaction obtain the mixing solutions of aluminium hydroxide and water glass, this method needs high-temperature and high-pressure conditions, and consume a large amount of sodium hydroxide, the production cost height.
Summary of the invention
The object of the present invention is to provide a kind of high alumina coal gangue, coal ash alkali solution-off silicon to prepare the technology of hydrated aluminum silicate, silicon in coal gangue, the flyash is partly deviate to enter solution make sodium silicate solution, obtain the desilication product hydrated aluminum silicate simultaneously, prepare aluminum oxide with the hydrated aluminum silicate that obtains, can reach and cut down the consumption of energy, disposable resource consumption, reduce the purpose of silico-calcium matter tailings quantity discharged.Simultaneously, the byproduct of alkali solution-off silicon is a sodium silicate solution, can be used as the raw material of preparation inorganic silicon compound product, thereby improves the economic benefit of whole technology.
To achieve these goals, technical scheme provided by the invention is as follows:
High alumina bastard coal crystal soda solution-off silicon prepares the technology of hydrated aluminum silicate, may further comprise the steps:
High alumina calcined coal gangue activatory step: the high alumina coal gangue under 900～1050 ℃ of temperature, is calcined 2～4h;
Alkali solution-off silicon step: the configuration concentration of lye is 3～8mol/L, with described burnt high alumina coal gangue and described alkali lye together under 80～100 ℃ of temperature, stirring reaction 2～6h;
Filtering step: the reaction slurry filtering separation, obtain sodium silicate solution, obtain the hydrated aluminum silicate filter cake simultaneously.
Optimize, the liquid-solid ratio of the molten reaction of alkali is 2～5 in the described alkali solution-off silicon step.
Optimize 100～300 rev/mins of the stir speed (S.S.)s of reaction process in the described alkali solution-off silicon step.
Optimize, between described high alumina calcined coal gangue activatory step and alkali solution-off silicon step, also comprise calcining coal gangue levigated step: calcining coal gangue is levigate to-325 orders＞90%.
The present invention also provides aluminous fly-ash alkali solution-off silicon to prepare the technology of hydrated aluminum silicate, may further comprise the steps:
Alkali solution-off silicon step: the configuration concentration of lye is 3～8mol/L, with aluminous fly-ash and described alkali lye together under 80～100 ℃ of temperature, stirring reaction 2～6h;
Filtering step: the reaction slurry filtering separation, obtain sodium silicate solution, it is sharp to obtain the hydrated aluminum silicate filter simultaneously.
Optimize, the liquid-solid ratio of the molten reaction of alkali is 2～5 in the described alkali solution-off silicon step.
Optimize 50～300 rev/mins of the stir speed (S.S.)s of reaction process in the described alkali solution-off silicon step.
Optimize, before alkali solution-off silicon step, also comprise aluminous fly-ash levigated step: aluminous fly-ash is levigate to-325 orders＞90%.
Beneficial effect of the present invention is as follows:
The alkali solution-off silicon of high alumina coal gangue of the present invention, aluminous fly-ash prepares the technology of hydrated aluminum silicate, the dissolving of partial oxidation silicon is entered solution, on the one hand, improved the alumina silica ratio of material, gained hydrated aluminum silicate filter cake is as the raw material of producing aluminum oxide, can reduce the quantity discharged of joining alkali number and silico-calcium tailings in the production process, reduce the energy consumption of reaction process.On the other hand, the gained sodium silicate solution can be used for the inorganic silicon compound product of production high added value, thereby improves the economic benefit of whole technology, improves the technical and economic feasibility of whole technology.
Description of drawings
Fig. 1 prepares the process flow sheet of hydrated aluminum silicate for the molten pre-desiliconization of high alumina bastard coal crystal soda of the present invention;
Fig. 2 is the X-ray powder diffraction figure that utilizes the hydrated aluminum silicate of high alumina coal gangue preparation;
Fig. 3 is the X-ray powder diffraction figure that utilizes the hydrated aluminum silicate of aluminous fly-ash preparation.
Embodiment
Further specify technology of the present invention below in conjunction with embodiment.
Embodiment 1
Experimental raw: somewhere high alumina coal gangue
Chemical composition analysis result (the w of table 1 high alumina coal gangue sample
B%)
Get above-mentioned high alumina coal gangue sample, place cabinet-type electric furnace, under 1000 ℃ condition, calcination time 3h, calcinate is levigate to-325 orders＞90%.High alumina coal gangue sample 1000g, the concentration of getting after the calcining are the sodium hydroxide lye 2L of 4mol/L, place in the reactor and mix, instrument is opened in the sealing back, continuing to be warming up to 95 ℃ under stirring (150r/min) condition, continue to stir 4h under this condition, reaction finishes after-filtration, with 3 washing leaching cakes of 2L industry moisture, obtain water glass filtrate 3.36L (being used to prepare inorganic silicon compound), its chemical composition analysis the results are shown in Table 2; Obtain hydrated aluminum silicate material 990g, its X-ray powder diffraction figure sees Fig. 2, as the raw material of producing aluminum oxide.
The chemical composition analysis result (g/L) of table 2 sodium silicate solution
Table 3 utilizes the chemical composition analysis result (w of the hydrated aluminum silicate of high alumina coal gangue preparation
B%)
Adopt technology of the present invention, the desiliconization rate of this high alumina coal gangue sample is 45.6%.
Embodiment 2
Experimental raw: somewhere aluminous fly-ash
Chemical composition analysis result (the w of table 4 aluminous fly-ash sample
B%)
It is the alkali lye 4L of 6mol/L that levigate extremely-325 orders＞90% of above-mentioned high alumina coal gangue sample is got levigated aluminous fly-ash 2000g concentration, place in the reactor and mix, instrument is opened in the sealing back, continuing to be warming up to 100 ℃ under stirring (150r/min) condition, continue to stir 3h under this condition, reaction finishes after-filtration, with 3 washing leaching cakes of 4L industry moisture, get water glass filtrate 652L (being used to prepare inorganic silicon compound), its chemical composition analysis the results are shown in Table 5; Obtain hydrated aluminum silicate material 1800g, its X-ray powder diffraction figure sees Fig. 3, is a kind of p type molecular sieve, contains a spot of mullite phase, as the raw material of producing aluminum oxide.
The chemical composition analysis result (g/L) of table 5 sodium silicate solution
Table 6 utilizes the chemical composition analysis result of the hydrated aluminum silicate of high alumina coal gangue preparation
Adopt technology of the present invention, the desiliconization rate of this aluminous fly-ash sample is 38%.
Claims (8)
1. high alumina bastard coal crystal soda solution-off silicon prepares the technology of hydrated aluminum silicate, it is characterized in that: comprise following steps:
High alumina calcined coal gangue activatory step: the high alumina coal gangue under 900～1050 ℃ of temperature, is calcined 2～4h;
Alkali soaks the desiliconization step: the configuration concentration of lye is 3～8mol/L, with described burnt high alumina coal gangue and described alkali lye together under 80～100 ℃ of temperature, stirring reaction 2～6h;
Filtering step: the reaction slurry filtering separation, obtain sodium silicate solution, obtain the hydrated aluminum silicate filter cake simultaneously.
2. high alumina bastard coal crystal soda solution-off silicon according to claim 1 prepares the technology of hydrated aluminum silicate, it is characterized in that: the liquid-solid ratio of the molten reaction of alkali is 2～5 in the described alkali solution-off silicon step.
3. high alumina bastard coal crystal soda solution-off silicon according to claim 1 prepares the technology of hydrated aluminum silicate, it is characterized in that: 50～300 rev/mins of the stir speed (S.S.)s of reaction process in the described alkali solution-off silicon step.
4. high alumina bastard coal crystal soda solution-off silicon according to claim 1 prepares the technology of hydrated aluminum silicate, it is characterized in that: also comprise calcining coal gangue levigated step between described high alumina calcined coal gangue activatory step and alkali solution-off silicon step: calcining coal gangue is levigate to-325 orders＞90%.
5. the molten pre-desiliconization of the alkali of aluminous fly-ash prepares the technology of hydrated aluminum silicate, it is characterized in that: comprise following steps:
Alkali solution-off silicon step: the configuration concentration of lye is 3～8mol/L, with aluminous fly-ash and described alkali lye together under 80～100 ℃ of temperature, stirring reaction 2～6h;
Filtering step: the reaction slurry filtering separation, obtain sodium silicate solution, obtain the hydrated aluminum silicate filter cake simultaneously.
6. aluminous fly-ash alkali solution-off silicon according to claim 5 prepares the technology of hydrated aluminum silicate, it is characterized in that: the liquid-solid ratio of the molten reaction of alkali is 2～5 in the described alkali solution-off silicon step.
7. aluminous fly-ash alkali solution-off silicon according to claim 5 prepares the technology of hydrated aluminum silicate, it is characterized in that: 50～300 rev/mins of the stir speed (S.S.)s of reaction process in the described alkali solution-off silicon step.
8. aluminous fly-ash alkali solution-off silicon according to claim 5 prepares the technology of hydrated aluminum silicate, it is characterized in that: also comprised aluminous fly-ash levigated step before alkali solution-off silicon step: aluminous fly-ash is levigate to-325 orders＞90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010114787 CN102167338B (en) | 2010-02-26 | 2010-02-26 | Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010114787 CN102167338B (en) | 2010-02-26 | 2010-02-26 | Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102167338A true CN102167338A (en) | 2011-08-31 |
| CN102167338B CN102167338B (en) | 2013-03-13 |
Family
ID=44488693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010114787 Expired - Fee Related CN102167338B (en) | 2010-02-26 | 2010-02-26 | Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102167338B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583409A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing mullite and calcium silicate by using high-alumina fly ash |
| CN102583411A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing mullite by using fly ash |
| CN102583410A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing active calcium silicate by using fly ash desilication mother solution |
| CN103288107A (en) * | 2013-05-29 | 2013-09-11 | 如皋市乐恒化工有限公司 | Method for preparing high-purity aluminum oxide from coal gangue |
| CN103539137A (en) * | 2013-11-07 | 2014-01-29 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for producing xonotlite by taking pulverized fuel ash as raw material |
| CN105523561A (en) * | 2016-01-19 | 2016-04-27 | 内蒙古日盛可再生资源有限公司 | Method for efficiently desilicating high alumina coal gangue |
| CN106946281A (en) * | 2016-01-07 | 2017-07-14 | 中国科学院过程工程研究所 | A kind of preparation method of Si-containing aluminate solution desiliconization agent |
| CN108821840A (en) * | 2018-09-05 | 2018-11-16 | 辽宁盛达环保科技发展有限公司 | Gangue prepares the technique without magnetic and magnetization solubility in citric acid siliceous fertilizer simultaneously |
| CN110591155A (en) * | 2019-08-26 | 2019-12-20 | 榆林学院 | Composite super absorbent polymer containing coal gangue and starch and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155578A (en) * | 1996-11-25 | 1997-07-30 | 魏忠汉 | Non-phosphorus detergent |
| CN101172632A (en) * | 2007-10-11 | 2008-05-07 | 刘成长 | Technique for producing hydroted alumina and silicic acid with coal gangue |
| CN101445254A (en) * | 2008-12-31 | 2009-06-03 | 平朔煤炭工业公司 | Method for producing 4A molecular sieve |
-
2010
- 2010-02-26 CN CN 201010114787 patent/CN102167338B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155578A (en) * | 1996-11-25 | 1997-07-30 | 魏忠汉 | Non-phosphorus detergent |
| CN101172632A (en) * | 2007-10-11 | 2008-05-07 | 刘成长 | Technique for producing hydroted alumina and silicic acid with coal gangue |
| CN101445254A (en) * | 2008-12-31 | 2009-06-03 | 平朔煤炭工业公司 | Method for producing 4A molecular sieve |
Non-Patent Citations (1)
| Title |
|---|
| 《煤炭加工与综合利用》 20091231 刘成长 从煤矸石中提取氧化铝和二氧化硅的新工艺 第49-53页 1-4 , 第1期 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583409A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing mullite and calcium silicate by using high-alumina fly ash |
| CN102583411A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing mullite by using fly ash |
| CN102583410A (en) * | 2012-01-10 | 2012-07-18 | 中国科学院过程工程研究所 | Method for producing active calcium silicate by using fly ash desilication mother solution |
| CN103288107A (en) * | 2013-05-29 | 2013-09-11 | 如皋市乐恒化工有限公司 | Method for preparing high-purity aluminum oxide from coal gangue |
| CN103539137A (en) * | 2013-11-07 | 2014-01-29 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for producing xonotlite by taking pulverized fuel ash as raw material |
| CN106946281A (en) * | 2016-01-07 | 2017-07-14 | 中国科学院过程工程研究所 | A kind of preparation method of Si-containing aluminate solution desiliconization agent |
| CN106946281B (en) * | 2016-01-07 | 2019-05-10 | 中国科学院过程工程研究所 | A kind of preparation method of Si-containing aluminate solution desiliconization agent |
| CN105523561A (en) * | 2016-01-19 | 2016-04-27 | 内蒙古日盛可再生资源有限公司 | Method for efficiently desilicating high alumina coal gangue |
| CN108821840A (en) * | 2018-09-05 | 2018-11-16 | 辽宁盛达环保科技发展有限公司 | Gangue prepares the technique without magnetic and magnetization solubility in citric acid siliceous fertilizer simultaneously |
| CN110591155A (en) * | 2019-08-26 | 2019-12-20 | 榆林学院 | Composite super absorbent polymer containing coal gangue and starch and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102167338B (en) | 2013-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102167338B (en) | Technology for preparing hydrated sodium aluminosilicate by utilizing high-alumina coal gangue and fly ash alkali soluble desiliconization | |
| CN104671811B (en) | A kind of method utilizing two sections of acid treatments of aluminous fly-ash to prepare mullite | |
| CN104386720B (en) | Method for acid-alkali combined extraction of alumina from high-silicon aluminum-containing mineral raw material | |
| CN102627305B (en) | Method using alkaline process to extract alumina in coal ash | |
| CN101891224A (en) | Method for producing alumina and white carbon black by utilizing red mud and flyash | |
| CN102225778A (en) | Method for production of alumina, joint product of cement and joint product of 4A zeolite molecular sieve with high aluminum fly ash | |
| CN102020299B (en) | Method for producing industrial activated aluminum oxide from pulverized fuel ash | |
| CN102838147B (en) | Method for preparing mixed solution of sodium aluminate and potassium aluminate from alkaline syenite | |
| CN106745027B (en) | A kind of method of flyash synthesis analcime | |
| CN104787788B (en) | Method for producing alumina from high-alumina fly ash | |
| CN106220190A (en) | A kind of method utilizing aluminous fly-ash to prepare mullite | |
| CN101591150A (en) | A kind of method of utilizing silico-calcium slag and carbide slag to produce silicate cement | |
| CN101591197A (en) | A kind of method of utilizing pre-desiliconizing with high alumina fly ash to prepare calcium silicate fertilizer | |
| CN103349994B (en) | A kind of catalyst that reclaims from coal ash is also separated the method obtaining aluminum contained compound | |
| CN101306928B (en) | Pre- desiliconizing method from fly ash or slag | |
| CN103880044B (en) | Method for preparing potassium carbonate by adopting potash feldspar powder | |
| CN1296280C (en) | Method for combination producing alumina and cement from chalk and flyash | |
| CN101112990A (en) | Method for co-production of white carbon black, aluminum oxide and kerogen by kerosene shale | |
| CN103738972A (en) | Method for preparing silicon micropowder by using pulverized fuel ash aluminum extraction residues | |
| CN103936045B (en) | A kind of method extracting aluminum oxide from flyash | |
| CN110482582A (en) | Method that is a kind of while extracting aluminium oxide in flyash and red mud | |
| CN103351014A (en) | Method for extraction and preparation of alumina from coal ash | |
| CN106044784A (en) | Method for producing high-purity silicon dioxide by utilizing flyash | |
| CN109052446A (en) | A method of calcium aluminium houghite is prepared using industrial residue for raw material | |
| CN106044813B (en) | A kind of coal ash for manufacturing cleans technique for activated alumina |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Gaojie Document name: Notice of termination of patent right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20210226 |