CN102134645A - Desiliconizing method of hydrochloric acid leaching liquor of red mud - Google Patents
Desiliconizing method of hydrochloric acid leaching liquor of red mud Download PDFInfo
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- CN102134645A CN102134645A CN201110040877XA CN201110040877A CN102134645A CN 102134645 A CN102134645 A CN 102134645A CN 201110040877X A CN201110040877X A CN 201110040877XA CN 201110040877 A CN201110040877 A CN 201110040877A CN 102134645 A CN102134645 A CN 102134645A
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- China
- Prior art keywords
- hydrochloric acid
- red mud
- leaching liquor
- acid leaching
- beaker
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a desiliconizing method of the hydrochloric acid leaching liquor of red mud, belonging to the technical field of the desiliconizing method of the hydrochloric acid leaching liquor of red mud. The invention aims to solve the problem of providing an efficient method of the hydrochloric acid leaching liquor of red mud. The scheme adopted by the invention is operated according to the following steps: 1) pouring the hydrochloric acid leaching liquor of red mud in a beaker, and placing the beaker in a constant temperature water bath; 2) adding silicic acid gel seed crystals accounting for 2-4wt% of the hydrochloric acid leaching liquor of red mud, and stirring for 120 minutes; 3) adding a columnar or spherical activated carbon adsorbent accounting for 10-15wt% of the hydrochloric acid leaching liquor of red mud, and stirring for 30-60 minutes; 4) cooling naturally; 5) standing at 25 DEG C for 12 hours; and 6) filtering with a vacuum filtration device. The method can be used in the desiliconizing technical field of the hydrochloric acid leaching liquor of red mud.
Description
Technical field
The invention belongs to the red mud hydrochloric acid leachate and remove the method and technology field of silicon.
Technical background
The waste material of alumina producing Bayer process---red mud extracts in the technological process of Scium trioxide, at first will leach red mud with hydrochloric acid, obtains hydrochloric acid leachate.Mainly contain aluminum chloride, iron(ic) chloride, Scium trichloride, calcium chloride in the hydrochloric acid leachate, the part silicate in the red mud is in the hydrochloric acid leaching process, and silicon also enters into leach liquor with the form of silicic acid.The silicon that enters into leach liquor is gel state, is difficult to precipitation, causes filtration difficulty, especially when the solution extraction scandium, causes a large amount of emulsification, makes the technological process of leach liquor extracting scandium be difficult to carry out, and causes a large amount of losses of extraction agent and scandium.
Summary of the invention
In order to overcome the deficiency that prior art exists, problem to be solved by this invention provides the method for a kind of hydrochloric acid leachate of red mud efficiently desiliconization.
In order to address the above problem, the present invention is achieved through the following technical solutions:
The method of red mud hydrochloric acid leachate desiliconization, operate according to following steps:
A. the red mud leach liquor is put into beaker, described beaker is put in the water bath with thermostatic control, be heated to 60-80 ℃;
B. the 2-4% that presses red mud salt acidleach red mud salt acidleach leach liquor weight adds the silicic acid gel crystal seed, with electric mixer slow shelves is set and stirs 120 minutes;
C. press leach liquor weight 10%-15% and add column or globular acticarbon, with electric mixer slow shelves are set and stir 30-60min;
D. naturally cool to 25 ℃ of room temperatures
E. under 25 ℃, leave standstill 12h;
F. filter with vacuum apparatus.
Compared with prior art, the invention has the beneficial effects as follows: owing to adopt the leach liquor of heating, adding crystal seed and sorbent material remove the method for silicon in the hydrochloric acid leachate, thereby improved the percentage extraction of scandium, solved extraction scandium emulsion, also improved the decreasing ratio of silicon simultaneously, filtration velocity is fast, simple to operate easy, with low cost.
Embodiment
The method of red mud hydrochloric acid leachate desiliconization, operate according to following steps:
A. the red mud leach liquor is put into beaker, described beaker is put in the water bath with thermostatic control, be heated to 60-80 ℃;
B. the 2-4% that presses red mud salt acidleach red mud salt acidleach leach liquor weight adds the silicic acid gel crystal seed, with electric mixer slow shelves is set and stirs 120 minutes;
C. press leach liquor weight 10%-15% and add column or globular acticarbon, with electric mixer slow shelves are set and stir 30-60min;
D. naturally cool to 25 ℃ of room temperatures
E. under 25 ℃, leave standstill 12h;
F. filter with vacuum apparatus.
Be described further below in conjunction with embodiment
1. hydrochloric acid leaches the red mud process
Hydrochloric acid is put into beaker, in water bath with thermostatic control, be heated to 60 ± 1 ℃ after, slowly be added in the electric oven red mud after the oven dry, begin to stir with electric mixer, pick up counting behind constant temperature to 60 ± 1 ℃.Behind the 120min, from water bath with thermostatic control, take out beaker and filter with vacuum apparatus while hot, obtain leaching red mud slag and red mud hydrochloric acid leachate.
The water bath with thermostatic control of heating usefulness is the LH586-3 type water bath with thermostatic control that Shanghai Hu Xi instrument plant produces in the operation, and used electric mixer is the accurate reinforcement electric mixer of JJ-1 that Changzhou state China Instr Ltd. produces.
2. hydrochloric acid leachate desiliconization process
The red mud leach liquor is put into beaker, be re-applied in the water bath with thermostatic control, be heated to 70 ± 1 ℃, slowly stir with electric mixer, and press 3% of leach liquor weight and add the silicic acid gel crystal seed, stir after 120 minutes, under the effect of crystal seed, the silicic acid in the leach liquor progressively aggregates into silicic acid gel and fluctuates in leach liquor, press the acticarbon that leach liquor weight 12% adds column again, continue to stir 60min, silicic acid gel is adsorbed on the acticarbon, stops to stir, naturally cool to 25 ℃, after leaving standstill 12h, filter, obtain the hydrochloric acid leachate of desiliconization with vacuum apparatus.
3. the mensuration of silicon
Measure before the desiliconization with molybdenum blue spectrophotometric method that the content of silicon-dioxide is 1.32% in the hydrochloric acid leachate, after the desiliconization in the hydrochloric acid leachate content of silicon-dioxide be 0.15%, the decreasing ratio of silicon is 90.15%.
The SP-723PC visible spectrophotometer that the determining instrument of silicon adopts Shanghai Spectrum Apparatus Co., Ltd. to produce.
4. the chemical constitution of red mud
The main chemical constitution of red mud sees the following form
5. hydrochloric acid leaches the main chemical reactions formula of red mud process
Sc
2O
3+ 6HCl===2ScCl
3+ 3H
2O; (leaching of Scium trioxide)
CaO+2HCl===CaCl
2+ H
2O (leaching of calcium oxide)
Al
2O
3+ 6HCl===2AlCl
3+ 3H
2O (leaching of aluminum oxide)
Fe
2O
3+ 6HCl===2FeCl
3+ 3H
2O (leaching of ferric oxide)
Silicon in the red mud mainly exists with the form of Calucium Silicate powder and water glass.
CaSiO
3+ 2HCl===H
2SiO
3+ CaCl
2(leaching of silicon)
Na
2SiO
3+ 2HCl===H
2SiO
3+ 2NaCl (leaching of silicon)
6. the main chemical reactions formula of hydrochloric acid leachate desiliconization process
NH
2SiO
3(the H of===
2SiO
3)
nN=5-200 (the silicon heated polymerizable becomes silicic acid gel) ... (1)
(H
2SiO
3)
n(the SiO of===
2)
n+ nH
2O n=5-200 (silicic acid gel thermal dehydration) ... (2)
(SiO2) n in the formula (2) is cotton-shaped separating out in leach liquor.
7. add the effect of silicic acid gel crystal seed
In leach liquor, form nucleus, promote the rapid polymerization of silicic acid gel.
8. the effect that adds column or globular acticarbon
The tiny silicon-dioxide that forms in the leach liquor is adsorbed on the acticarbon, so that the tiny silicon-dioxide and the solution that purify in the leach liquor filter.
The vacuum filtration device is a prior art, SHZ-D (III) the circulation ability of swimming vacuum pump that adopts Yuhua Instrument Co., Ltd., Gongyi City to produce; 1500ml filter flask, B and 1000ml wide-necked bottle that the north glass is produced are formed by connecting with rubber hose and Glass tubing.Described vacuum pump is connected with the sealing cover of wide-necked bottle with Glass tubing by rubber tubing, and B is positioned on the filter flask, and described filter flask is connected with the sealing cover of wide-necked bottle with Glass tubing by rubber tubing, dress Calcium Chloride Powder Anhydrous in the described wide-necked bottle.
Claims (1)
1. the method for red mud hydrochloric acid leachate desiliconization is characterized in that operating according to following steps:
A. the red mud hydrochloric acid leachate is put into beaker, described beaker is put in the water bath with thermostatic control, the water bath with thermostatic control temperature is 60-80 ℃;
B. the 2-4% that presses red mud hydrochloric acid leachate weight adds the silicic acid gel crystal seed, with electric mixer slow shelves is set and stirs 120 minutes;
C. the 10%-15% that presses red mud hydrochloric acid leachate weight adds column or globular acticarbon, is provided with electric mixer to stop to stir after slow shelves stir 30-60min;
D. naturally cool to 25 ℃ of room temperatures;
E. under 25 ℃, leave standstill 12h;
F. filter with vacuum apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110040877XA CN102134645A (en) | 2011-02-16 | 2011-02-16 | Desiliconizing method of hydrochloric acid leaching liquor of red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110040877XA CN102134645A (en) | 2011-02-16 | 2011-02-16 | Desiliconizing method of hydrochloric acid leaching liquor of red mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102134645A true CN102134645A (en) | 2011-07-27 |
Family
ID=44294570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110040877XA Pending CN102134645A (en) | 2011-02-16 | 2011-02-16 | Desiliconizing method of hydrochloric acid leaching liquor of red mud |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268551A (en) * | 2011-08-08 | 2011-12-07 | 太原理工大学 | Method for producing mischmetal with aluminum oxide red mud |
| CN102328942A (en) * | 2011-08-08 | 2012-01-25 | 山西同华科技有限公司 | Method for preparing sodium aluminate from alumina red mud |
| CN102390869A (en) * | 2011-08-08 | 2012-03-28 | 山西同华科技有限公司 | Method for preparing high-purity ferric oxide by using aluminum oxide red mud |
| CN113573817A (en) * | 2019-02-18 | 2021-10-29 | 美卓奥图泰芬兰有限公司 | Method and process arrangement for removing silicon-based compounds from a leaching solution, and use |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242756A (en) * | 1996-11-20 | 2000-01-26 | 科马尔柯铝制品有限公司 | Removal of silica from bauxite |
| CN1405091A (en) * | 2002-11-12 | 2003-03-26 | 中国铝业股份有限公司 | Dissolving-out method for beauxite type bauxite |
| CN101875129A (en) * | 2010-06-08 | 2010-11-03 | 中南大学 | Method for comprehensive utilization of high-iron bauxite |
-
2011
- 2011-02-16 CN CN201110040877XA patent/CN102134645A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242756A (en) * | 1996-11-20 | 2000-01-26 | 科马尔柯铝制品有限公司 | Removal of silica from bauxite |
| CN1405091A (en) * | 2002-11-12 | 2003-03-26 | 中国铝业股份有限公司 | Dissolving-out method for beauxite type bauxite |
| CN101875129A (en) * | 2010-06-08 | 2010-11-03 | 中南大学 | Method for comprehensive utilization of high-iron bauxite |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268551A (en) * | 2011-08-08 | 2011-12-07 | 太原理工大学 | Method for producing mischmetal with aluminum oxide red mud |
| CN102328942A (en) * | 2011-08-08 | 2012-01-25 | 山西同华科技有限公司 | Method for preparing sodium aluminate from alumina red mud |
| CN102390869A (en) * | 2011-08-08 | 2012-03-28 | 山西同华科技有限公司 | Method for preparing high-purity ferric oxide by using aluminum oxide red mud |
| CN102268551B (en) * | 2011-08-08 | 2013-02-13 | 太原理工大学 | Method for producing mischmetal with aluminum oxide red mud |
| CN113573817A (en) * | 2019-02-18 | 2021-10-29 | 美卓奥图泰芬兰有限公司 | Method and process arrangement for removing silicon-based compounds from a leaching solution, and use |
| CN113573817B (en) * | 2019-02-18 | 2023-10-13 | 美卓奥图泰芬兰有限公司 | Method and process unit for removing silicon-based compounds from leachate and use thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANXI KAIXING RED MUD DEVELOPMENT CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Keqin Inventor after: Sun Yanping Inventor after: Guo Jinyun Inventor after: Li Aixiu Inventor after: Zhang Shaolin Inventor after: Wang Hao Inventor after: Zhang Fenglin Inventor after: Deng Haixia Inventor after: Zhu Guohai Inventor after: Gong Yongchang Inventor after: Gong Yongsheng Inventor before: Wang Keqin Inventor before: Li Aixiu Inventor before: Zhang Shaolin Inventor before: Wang Hao Inventor before: Zhang Fenglin Inventor before: Deng Haixia Inventor before: Zhu Guohai |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG KEQIN LI AIXIU ZHANG SHAOLIN WANG HAO ZHANG FENGLIN DENG HAIXIA ZHU GUOHAI TO: WANG KEQIN LI AIXIU ZHANG SHAOLIN WANG HAO ZHANG FENGLIN DENG HAIXIA ZHU GUOHAI GONG YONGCHANG GONG YONGSHENG SUN YANPING GUO JINYUN |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110905 Address after: 030024 West Street, Taiyuan, Shanxi, No. 79, No. Applicant after: Taiyuan University of Technology Co-applicant after: Shanxi Kaixing Red Mud Development Co., Ltd. Address before: 030024 West Street, Taiyuan, Shanxi, No. 79, No. Applicant before: Taiyuan University of Technology |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110727 |