CN101905892A - Process method for preparing 4A zeolite by recycling silica slag and aluminium slag - Google Patents
Process method for preparing 4A zeolite by recycling silica slag and aluminium slag Download PDFInfo
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- CN101905892A CN101905892A CN 201010252760 CN201010252760A CN101905892A CN 101905892 A CN101905892 A CN 101905892A CN 201010252760 CN201010252760 CN 201010252760 CN 201010252760 A CN201010252760 A CN 201010252760A CN 101905892 A CN101905892 A CN 101905892A
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Abstract
The invention discloses a process method for preparing 4A zeolite by recycling silica slag and aluminium slag. In the process method, the silica slag containing F and Al elements generated in the process of producing aluminum fluoride and co-producing fluosilicic acid by phosphorus chemical engineering, and the aluminium slag (also named aluminium ash) generated in the process of producing electrolytic aluminium are taken as raw materials to produce the 4A zeolite. The synthesis route is that: the silica slag is subjected to pretreatment reaction to generate water glass, the aluminium slag is subjected to pretreatment reaction to generate sodium metaaluminate, and the water glass and the sodium metaaluminate are subjected to synthesis to generate the 4A zeolite. The invention provides a clean method for preparing the 4A zeolite from wastes, successfully solves the secondary pollution problem of the silica slag and the aluminium slag, reduces environmental pollution, and reduces the cost of raw materials for producing the 4A zeolite; in the production process, the generated NH4F and alkali liquor are directly recycled, so the energy is saved and the cost is reduced; and various indexes of the produced 4A zeolite meet the QB/T 1768-2003 standard of cleaning used 4a zeolite.
Description
Technical field
The present invention relates to a kind of method of the 4A of preparation zeolite, specifically be meant a kind of processing method white residue and aluminium slag recycling preparation 4A zeolite.
Background technology
China has formed and has produced about 4,000 ten thousand tons of P per year at present
2O
5The phosphoric acid by wet process production capacity.Follow simultaneously and produce about 2,000,000 tons by product silicofluoric acid per year, this by product will be if irrational utilization will cause huge pollution to environment, comparatively sophisticated now method is to produce to be used for fluoride salts (being mainly used in the solvent of electrolytic aluminum) such as aluminum fluoride and sodium aluminum fluoride, but the white residue (silicate hydrate) that will produce a large amount of fluorine-containing and aluminium elements in producing the fluoride salt process again causes serious secondary pollution.On the other hand, China's electrolytic aluminum is produced per year about 2,000 ten thousand tons, in the Aluminum Electrolysis Production process, will produce the lime that contains 80% metallic aluminium usually and be called a secondary aluminium lime-ash, be mainly used in two secondary aluminium industry (referring to reclaim the enterprise of aluminium) at present and reclaim aluminium with a secondary aluminium lime-ash, aluminium scrap goods and aluminum products, but reclaim the grey black (claiming two secondary aluminium lime-ash) that will produce a large amount of fluorine-containing and nitrogen etc. in the aluminium process again, this refuse has great harm to environment.The annual nearly 700,000 tons secondary aluminium lime-ash of China produces, and so how reasonably the above-mentioned white residue of processing, aluminium slag just become problem demanding prompt solution.
Because " taboo phosphorus " measure of developed country such as America and Europe washing industry, washing has obtained large development with the 4A zeolite, its at the consumption aspect the washing composition more than 1,100,000 tons.Main production method is " hydrothermal method " synthesis technique.But the raw materials cost height of this technology, product per ton need consume 0.5 ton in aluminium hydroxide, 0.6 ton of water glass, and 0.4 ton in caustic soda, the demestic user is difficult to accept.
China studies application work with the 4A zeolite as washing auxiliary detergent since the seventies in 20th century, and Chalco Shandong branch office had set up article one 4A zeolite production line in 1992.The annual capacity that the 4A zeolite is used in China's washing at present is about 400,000 tons, and its production method has kaolin method, swelling local method, bauxitic clay method etc.Wherein the most frequently used is the bauxitic clay method, but very big because of discharging a large amount of alkaline slag environmental pollutions.
Though it is multiple that the production of 4A zeolite has, every kind all has shortcoming separately, and summarizing to get up mainly is that energy consumption is big, and environmental pollution is serious, and this direction with energy-saving and emission-reduction, Sustainable development deviates from mutually; In addition, preparing superior prod often needs just to control from raw material, and this has improved production cost greatly, and most at home producers are difficult to bear.
Summary of the invention
Technical problem to be solved by this invention provides a kind of processing method with white residue and aluminium slag recycling preparation 4A zeolite, the aluminium slag (having another name called the aluminium ash) that produces in white residue that contains F, Al element that produces in the process of this processing method with phosphorous chemical industry by-product fluosilicic acid production aluminum fluoride and the Aluminum Electrolysis Production process is produced the 4A zeolite as starting material, this processing method can solve the secondary pollution problem of these two industries, also can reduce material cost of producing the 4A zeolite and the quality that improves the 4A zeolite simultaneously.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of processing method with white residue and aluminium slag recycling preparation 4A zeolite comprises the steps:
(1) white residue is carried out pretreatment reaction and generates water glass:
A, described white residue are produced the waste that contains F, Al element that produces in the process of aluminum fluoride for the phosphorous chemical industry by-product fluosilicic acid, with active SiO
2Count 25%-30%; White residue is added NH
4F solution is in reaction kettle for reaction, and reaction back Al is with Al (OH)
3The form precipitation, its reaction formula is: Al
3++ 3OH
-=Al (OH)
3↓, SiO
2Then with NH
4F generation (the NH that reacts
4)
2SiF
6, its reaction formula is: SiO
2+ 6NH
4F+2H
2O=(NH
4)
2SiF
6+ 4NH
4OH removes by filter impurity in the reaction solution, reclaims Al (OH)
3Add ammoniacal liquor in the reaction solution after filtering again, obtain active SiO respectively
2, NH
4F solution, its reaction formula is: reaction formula (NH
4)
2SiF
6+ 4NH
4OH=SiO
2+ 6NH
4F+2H
2O;
B, the active SiO that steps A is obtained
2Drop in the reactor, add entry and NaOH again, stir and be warming up to 90 ℃ of reactions 1 hour, obtain product water glass, its reaction formula is: SiO
2+ 2NaOH=Na
2SiO
3+ H
2O; The batching mol ratio is: SiO
2: NaOH: H
2O=1: 1: 9.5;
(2) the aluminium slag is carried out pretreatment reaction and generates sodium metaaluminate:
Described aluminium slag is the waste that produces in the Aluminum Electrolysis Production process, water and aluminium slag are put into reactor, be warming up to 60 ℃ of beginnings and slowly add NaOH, controlled temperature is in reaction below 90 ℃, treat NaOH add finish after again controlled temperature (be 88-92 ℃ for 90 ℃ ± 2 ℃, comprise 88 ℃, 92 ℃ and between the arbitrary temp scope) down reaction 1 hour, its reaction formula is: 2Al+2NaOH+H
2O=2NaAlO
2+ 2H
2↑; The reaction after the filter material essence of the filter material coarse filtration of 45 μ m and 5 μ m filter sodium aluminate solution; The batching mol ratio is: Al: NaOH: H
2O=1: 1.18: 20;
(3) sodium aluminate solution in water glass in the step (1) and the step (2) is carried out building-up reactions and generates the 4A zeolite:
Sodium aluminate solution in step (2) adds NaOH, at 60 ℃ ± 5 ℃ (is 55-65 ℃, comprise 55 ℃, 65 ℃ and between the arbitrary temp scope) stir down the water glass that adds step (1) preparation, insulation reaction was carried out gel in 1 hour, add again crystallization director be warming up to 95 ℃ ± 2 ℃ crystallization 2-3 hour, its reaction formula is: 12Na
2SiO
3+ 12NaAlO
2+ 39H
2O=Na
12Al
12Si
12O
4827H
2O+24NaOH dewaters then and washs to pH≤11, filters the back filtration cakes torrefaction and promptly gets the 4A zeolite product; The batching mol ratio is: NaAlO
2: Na
2SiO
3: NaOH: H
2O=1: 1: 3: 90.Crystallization director adopts the crystallization director commonly used of prior art to get final product.
The NH that the A step reaction obtains in the described step (1)
4F solution is back to the pretreatment reaction that participates in white residue in the reactor of A step once more.
Alkali lye after filtering in the described step (3) is back in the reactor of step (2) and participates in once more the aluminium slag is carried out the reaction that pretreatment reaction generates sodium metaaluminate.
The hydrogen that generates be will react in the described step (2) and emptying process or recovery carried out
The aluminium slag that produces in white residue that contains F, Al element that produces in the process of raw material of the present invention for phosphorous chemical industry by-product fluosilicic acid production aluminum fluoride and the Aluminum Electrolysis Production process, contain a large amount of Al, F element in the not treated white residue, and in case there is the introducing of Al, F element can make Si not dissolve, contain the partial C particle in the not treated aluminium slag, color contamination is gone into the whiteness that can have a strong impact on the finished product in the product darkly, so need carry out pre-treatment to white residue and aluminium slag, remove the impurity in white residue and the aluminium slag.White residue and NH
4The product of F solution reaction is Al (OH)
3Precipitation and (NH
4)
2SiF
6, Al after filtering (OH)
3Precipitation is gone aftertreatment, goes aftertreatment to comprise and recycles or abandon, and only stays (NH
4)
2SiF
6For subsequent reactions; It is hydrogen and the broad liquid of sodium metaaluminate that the aluminium slag adds the product that obtains after water and the NaOH reaction, hydrogen emptying process or recycling, sodium aluminate solution removes the C particle by the filter material coarse filtration of 45 μ m and the smart elimination of filter material of 5 μ m, obtains the higher sodium aluminate solution of purity for subsequent reactions.(NH
4)
2SiF
6Obtain SiO with the ammoniacal liquor reaction
2And NH
4F solution, SiO
2For subsequent reactions, NH
4F solution is recycled and the white residue reaction, has reduced cost like this; Alkali lye after the product that crystallization obtains filters is recycled and is participated in producing of sodium metaaluminate once more, has so also reduced cost.Add crystallization director and be because crystallization director has tangible inductive effect to 4A zeolite synthetic, accelerate crystallization rate greatly, simultaneously, the fine homogeneous of the granularity of zeolite, its calcium ion exchange rate also significantly improve.
In sum, the invention has the beneficial effects as follows:
1, to have invented one for the production of 4A zeolite be the clean preparation method of the production 4A zeolite of raw material with the waste in the present invention, successfully solved the secondary pollution problem of white residue and aluminium slag, reduced pollution, also reduced the material cost of producing the 4A zeolite environment;
2, the NH that produces in the production process
4F directly recycles with the mother liquor that contains small amount of N aOH, and save energy has reduced cost, and has realized no discharging of waste liquid, has solved prior art discharging of waste liquid problem of environment pollution caused;
3, the 4A zeolite produced of the inventive method, calcium exchanges at 300 butt (mgCaCO
3/ g) more than; Content≤1% of median size≤3 μ m and 〉=10 μ m, the content of≤4 μ m＞90%; Whiteness 〉=95%, the every index of product have reached the washing used QB/T 1768-2003 of 4A zeolite standard.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Embodiment 1
The described production washing of the present embodiment method of 4A zeolite, be that the phosphorous chemical industry by-product fluosilicic acid is produced " aluminium slag " (having another name called the aluminium ash) of producing in " white residue " that contain F, Al element that produce in the process of aluminum fluoride and the Aluminum Electrolysis Production process as starting material, produce the 4A zeolite with the caustic soda soln pre-treatment respectively, its synthetic route is specific as follows described:
At first white residue is carried out pretreatment reaction and generate water glass, on the other hand the aluminium slag is carried out pretreatment reaction and generate sodium metaaluminate, then water glass and sodium metaaluminate are carried out building-up reactions generation 4A zeolite.
Embodiment 1 synthetic route is: before this white residue being carried out pretreatment reaction and generate water glass, is the aluminium slag to be carried out pretreatment reaction generate sodium metaaluminate then, at last water glass and sodium metaaluminate is carried out building-up reactions generation 4A zeolite.Referring to shown in Figure 1, concrete steps are as follows:
(1) the phosphorous chemical industry by-product fluosilicic acid is produced the waste white residue and the NH that contain F, Al element that produces in the process of aluminum fluoride
4The F solution reaction generates product A l (OH)
3Precipitation and (NH
4)
2SiF
6
(2) product that step (1) reaction is obtained filters, after filtering Al (OH)
3Precipitation is gone aftertreatment, only stays (NH
4)
2SiF
6Solution;
(3) with (NH
4)
2SiF
6Solution feeds the ammoniacal liquor reaction, generates product S iO
2And NH
4F, NH
4The step (1) that is back to F continues to participate in reaction;
(4) SiO that step (3) reaction is obtained
2Add H
2O and NaOH water generation reaction glass, temperature of reaction is controlled at 90 ℃, and the reaction times is 1 hour; Batching mol ratio: SiO
2: NaOH: H
2O=1: 1: 9.5;
(5) the wasted aluminium slag that produces in the Aluminum Electrolysis Production process is mixed with water, temperature rises to 60 ℃ gradually, and is to be mixed even;
(6) mixture that step (5) is obtained slowly adds NaOH, and temperature is controlled at below 90 ℃, treat NaOH add finish after, controlled temperature is 90 ℃ ± 2 ℃ reactions 1 hour down, the product of reaction is hydrogen and sodium aluminate solution, with the hydrogen emptying process;
(7) sodium metaaluminate that step (6) reaction is obtained obtains purer sodium aluminate solution through the filter material coarse filtration of 45 μ m and the smart filter of filter material of 5 μ m; The batching mol ratio is: Al: NaOH: H
2O=1: 1.18: 20;
(8) the purer sodium aluminate solution that step (7) is obtained adds NaOH, stirs down at 60 ℃ ± 5 ℃ to add the product water glass that step (4) reaction obtains, and insulation reaction was carried out gel in 1 hour; The batching mol ratio is: NaAlO
2: Na
2SiO
3: NaOH: H
2O=1: 1: 3: 90;
(9) product that step (8) reaction is obtained added crystallization director, at 95 ℃ ± 2 ℃ following crystallization 2-3 hours;
(10) product that step (9) crystallization is obtained dewaters, washs to PH≤11, filters then, and the mother liquor after filtering is recycled the preparation that participates in sodium metaaluminate to step (6) once more;
(11) filter cake that obtains after step (10) filtration is carried out drying, dried product is a desired product 4A zeolite.
Embodiment 2
Present embodiment is consistent with the content of operation of embodiment 1, just synthetic route changes, before this aluminium slag is carried out pretreatment reaction and generate sodium metaaluminate, then white residue is carried out pretreatment reaction and generate water glass, at last water glass and sodium metaaluminate are carried out building-up reactions generation 4A zeolite.
Present embodiment is consistent with the content of operation of embodiment 1 and embodiment 2, just synthetic route changes, the aluminium slag is carried out pretreatment reaction generate sodium metaaluminate and white residue is carried out pretreatment reaction and generate water glass and carry out simultaneously, then water glass and sodium metaaluminate are carried out building-up reactions and generate the 4A zeolite.
According to the 4A zeolite of method for preparing, correlated quality index and detected result are as shown in the table:
Claims (4)
1. the processing method with white residue and aluminium slag recycling preparation 4A zeolite is characterized in that, comprises the steps:
(1) white residue is carried out pretreatment reaction and generates water glass:
A, described white residue are produced the waste that contains F, Al element that produces in the process of aluminum fluoride for the phosphorous chemical industry by-product fluosilicic acid, with active SiO
2Count 25%-30%; White residue is added NH
4F solution is in reaction kettle for reaction, and reaction back Al is with Al (OH)
3The form precipitation, its reaction formula is: Al
3++ 3OH
-=Al (OH)
3↓, SiO
2Then with NH
4F generation (the NH that reacts
4)
2SiF
6, its reaction formula is: SiO
2+ 6NH
4F+2H
2O=(NH
4)
2SiF
6+ 4NH
4OH removes by filter impurity in the reaction solution, reclaims Al (OH)
3Add ammoniacal liquor in the reaction solution after filtering again, obtain active SiO respectively
2, NH
4F solution, its reaction formula is: reaction formula (NH
4)
2SiF
6+ 4NH
4OH=SiO
2+ 6NH
4F+2H
2O;
B, the active SiO that steps A is obtained
2Drop in the reactor, add entry and NaOH again, stir and be warming up to 90 ℃ of reactions 1 hour, obtain product water glass, its reaction formula is: SiO
2+ 2NaOH=Na
2SiO
3+ H
2O; The batching mol ratio is: SiO
2: NaOH: H
2O=1: 1: 9.5;
(2) the aluminium slag is carried out pretreatment reaction and generates sodium metaaluminate:
Described aluminium slag is the waste that produces in the Aluminum Electrolysis Production process, water and aluminium slag are put into reactor, be warming up to 60 ℃ of beginnings and slowly add NaOH, controlled temperature is in reaction below 90 ℃, treat NaOH add finish after 90 ℃ ± 2 ℃ of controlled temperature reaction 1 hour down again, its reaction formula is: 2Al+2NaOH+H
2O=2NaAlO
2+ 2H
2↑; The reaction after the filter material essence of the filter material coarse filtration of 45 μ m and 5 μ m filter sodium aluminate solution; The batching mol ratio is: Al: NaOH: H
2O=1: 1.18: 20;
(3) sodium aluminate solution in water glass in the step (1) and the step (2) is carried out building-up reactions and generates the 4A zeolite:
Sodium aluminate solution in step (2) adds NaOH, stir the water glass that adds step (1) preparation down at 60 ℃ ± 5 ℃, insulation reaction was carried out gel in 1 hour, add again crystallization director be warming up to 95 ℃ ± 2 ℃ crystallization 2-3 hour, its reaction formula is: 12Na
2SiO
3+ 12NaAlO
2+ 39H
2O=Na
12Al
12Si
12O
4827H
2O+24NaOH dewaters then and washs to pH≤11, filters the back filtration cakes torrefaction and promptly gets the 4A zeolite product; The batching mol ratio is: NaAlO
2: Na
2SiO
3: NaOH: H
2O=1: 1: 3: 90.
2. a kind of processing method with white residue and aluminium slag recycling preparation 4A zeolite according to claim 1 is characterized in that: the NH that the A step reaction obtains in the described step (1)
4F solution is back to the pretreatment reaction that participates in white residue in the reactor of A step once more.
3. according to claim 1ly a kind of white residue and aluminium slag are recycled the processing method of preparation 4A zeolite, it is characterized in that: the alkali lye after filtering in the described step (3) is back in the reactor of step (2) and participates in once more the aluminium slag is carried out the reaction that pretreatment reaction generates sodium metaaluminate.
4. double slag process according to claim 1 prepares the 4A zeolite, it is characterized in that: will react the hydrogen that generates in the described step (2) and carry out emptying process or recovery.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121693A (en) * | 2013-03-19 | 2013-05-29 | 中南大学 | Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization |
| CN103787362A (en) * | 2014-01-20 | 2014-05-14 | 石家庄健达高科化工有限公司 | Process for preparing 4A molecular sieve by use of imported trihydrate bauxite |
| CN105236443A (en) * | 2015-09-16 | 2016-01-13 | 山东磊宝锆业科技股份有限公司 | Technology for preparing 4A zeolite from AZS solid waste material |
| CN110156030A (en) * | 2019-05-08 | 2019-08-23 | 舒爱桦 | A kind of fluorine-containing silicon slag purifying technique of fluosilicic acid |
| CN112897548A (en) * | 2021-02-06 | 2021-06-04 | 达州励志环保科技有限公司 | Production process of 4A zeolite |
| CN114014332A (en) * | 2021-11-03 | 2022-02-08 | 兰州理工大学 | Method for preparing 4A molecular sieve by using aluminum ash and micro silicon powder |
| CN114749468A (en) * | 2022-03-24 | 2022-07-15 | 江西省科学院应用物理研究所 | Process for treating aluminous ash by using villiaumite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299945A (en) * | 2003-03-31 | 2004-10-28 | Asahi Denka Kogyo Kk | Method of producing a-type zeolite from waste white clay |
| JP2007137716A (en) * | 2005-11-17 | 2007-06-07 | Research Institute Of Innovative Technology For The Earth | Method for manufacturing zeolite |
| CN101139099A (en) * | 2007-05-22 | 2008-03-12 | 中国铝业股份有限公司 | Technique for producing 4A zeolite by using sodium white slime |
| CN101269816A (en) * | 2008-05-16 | 2008-09-24 | 夏克立 | Method for producing fluorine series compounds and white carbon black |
-
2010
- 2010-08-13 CN CN2010102527603A patent/CN101905892B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299945A (en) * | 2003-03-31 | 2004-10-28 | Asahi Denka Kogyo Kk | Method of producing a-type zeolite from waste white clay |
| JP2007137716A (en) * | 2005-11-17 | 2007-06-07 | Research Institute Of Innovative Technology For The Earth | Method for manufacturing zeolite |
| CN101139099A (en) * | 2007-05-22 | 2008-03-12 | 中国铝业股份有限公司 | Technique for producing 4A zeolite by using sodium white slime |
| CN101269816A (en) * | 2008-05-16 | 2008-09-24 | 夏克立 | Method for producing fluorine series compounds and white carbon black |
Non-Patent Citations (1)
| Title |
|---|
| 《轻金属》 20081231 杨会宾等 钠硅渣综合利用途径 第16-19页 1-4 , 第11期 2 * |
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| CN103121693A (en) * | 2013-03-19 | 2013-05-29 | 中南大学 | Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization |
| CN103121693B (en) * | 2013-03-19 | 2015-01-21 | 中南大学 | Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization |
| CN103787362A (en) * | 2014-01-20 | 2014-05-14 | 石家庄健达高科化工有限公司 | Process for preparing 4A molecular sieve by use of imported trihydrate bauxite |
| CN103787362B (en) * | 2014-01-20 | 2016-10-12 | 石家庄健达高科化工有限公司 | A kind of technique utilizing import gibbsite-type bauxite to prepare 4A molecular sieve |
| CN105236443A (en) * | 2015-09-16 | 2016-01-13 | 山东磊宝锆业科技股份有限公司 | Technology for preparing 4A zeolite from AZS solid waste material |
| CN105236443B (en) * | 2015-09-16 | 2017-10-13 | 山东磊宝锆业科技股份有限公司 | The technique that AZS solid wastes prepare 4A zeolites |
| CN110156030A (en) * | 2019-05-08 | 2019-08-23 | 舒爱桦 | A kind of fluorine-containing silicon slag purifying technique of fluosilicic acid |
| CN112897548A (en) * | 2021-02-06 | 2021-06-04 | 达州励志环保科技有限公司 | Production process of 4A zeolite |
| CN114014332A (en) * | 2021-11-03 | 2022-02-08 | 兰州理工大学 | Method for preparing 4A molecular sieve by using aluminum ash and micro silicon powder |
| CN114749468A (en) * | 2022-03-24 | 2022-07-15 | 江西省科学院应用物理研究所 | Process for treating aluminous ash by using villiaumite |
| CN114749468B (en) * | 2022-03-24 | 2023-07-07 | 江西省科学院应用物理研究所 | Process for treating aluminum ash by utilizing fluoride salt |
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