CN101973530A - Method for treating waste titanium dioxide acid - Google Patents
Method for treating waste titanium dioxide acid Download PDFInfo
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- CN101973530A CN101973530A CN 201010511576 CN201010511576A CN101973530A CN 101973530 A CN101973530 A CN 101973530A CN 201010511576 CN201010511576 CN 201010511576 CN 201010511576 A CN201010511576 A CN 201010511576A CN 101973530 A CN101973530 A CN 101973530A
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- Prior art keywords
- acid
- titanium dioxide
- sulfuric acid
- titanium white
- titanium
- 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.)
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- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for treating waste titanium dioxide acid, comprising the following steps of: (1) carrying out precipitation pretreatment on waste titanium dioxide acid, and separating and recycling solid titanium; and (2) mixing a solution obtained in the step (1) with concentrated sulfuric acid or fuming acid according to a mass ratio of 1:0.7-2, and curing; and carrying out solid-liquid separation to obtain 58-69% sulfuric acid and a ferrous sulfate crystal. The invention has the advantages that the process is simple, equipment investment is less, no external heat source is needed, equipment maintenance is simple, the production can be carried out continuously and cannot be shut down due to equipment blockage, the concentration of acid can reach about 65%, the impurities are less and the application range is wider.
Description
Technical field
The present invention relates to the treatment technology of the useless by product dilute sulphuric acid of titanium dioxide, be specifically related to a kind of treatment process of titanium white waste acid.
Background technology
Data shows that Production By Sulfuric Acid Process titanium white per ton will discharge 8 ~ 10 tons of dilute sulphuric acids (being the titanium hydrolysis mother liquor), generally contains H
2SO
4About 20%, also contain Fe
2+About 4% and a small amount of other soluble sulphate impurity.This diluted acid can partially recycled aborning utilization, for example when acidolysis as dilution water, as the part of reaction acid, reduce the consumption of the vitriol oil; Or it is stable in order to adjusting titanium liquid F value and raising when the acidolysis solid formation leaches.But the amount of these reuses is limited, and a large amount of spent acid also need be by handling or utilizing.
At present, the method for processing both at home and abroad or utilization has: 1. acid washing rolled steel rust cleaning; 2. with the spent acid evaporation and concentrating, reach back use more than 60%; 3. with ammoniacal liquor neutralization becoming liquid fertilizer sulphur ammonium; 4, with in lime or the calcium carbide mud and produce gypsum; 5, make artificial rutile etc.
In the aforesaid method, method 1 and method 5 spent acid consumptions are limited; Method 2 steam concentrating waste acid equipment requirements height, investment is big, running cost higher (400 ~ 500 yuan/ton), equipment stops up easily, and system's driving rate is lower; The not easy to store and transportation of method 3 products, market capacity is limited, is difficult to scale operation; The gypsum enormous amount that method 4 is produced is utilized and is subjected to region limits, is easy to cause secondary pollution.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming of the prior art, a kind of treatment process of with low cost, the simple titanium white waste acid of technology is provided.
For realizing goal of the invention, the technical solution used in the present invention is as follows:
The treatment process of titanium white waste acid of the present invention is as follows: spent acid is precipitated pre-treatment, separate and the solid shape titanium of recovery; The dilute sulphuric acid that above-mentioned steps is obtained and the vitriol oil are by mixed, the slaking of mass ratio 1:0.7 ~ 1.3; Carry out solid-liquid separation and can obtain 58 ~ 69% sulfuric acid and ferrous sulfate crystal.
Be specially: spent acid is precipitated pre-treatment, separate and the solid shape titanium of recovery; To directly press 1:0.7 ~ 1.3 mixed with 92 ~ 98% vitriol oils through 18% ~ 25% dilute sulphuric acid that above-mentioned steps obtains, the rejected heat that utilizes concentrated acid is with the Fe SO in the spent acid
4.7H
2The O dehydration is Fe SO
4.H
2O wash rice from liquid comes out, and slaking was carried out solid-liquid separation and can be obtained 58 ~ 69% sulfuric acid and ferrous sulfate crystal after 1 ~ 1.5 hour.
The inventive method is utilized the heat of dilution of the vitriol oil, and it is ferrous to make iron vitriol be transformed into a sl. sol. water, and realize the purifying of dilute sulphuric acid and carry densely, be that a kind of with low cost, technology is simply put forward method dense, simultaneously efficient deironing with the useless diluted acid of titanium white.
The method of the useless direct processing and utilizing of diluted acid of the present invention and other titanium whites and steam concentrate to be put forward dense method and compare and have following advantage: (1) technology is simple, and facility investment is few; (2) need not extraneous thermal source; (3) produce and to carry out continuously, can not stop because equipment stops up; (4) maintenance of the equipment is simple; (5) dense the reaching about 65% of acid, impurity is few, and purposes is wider.
Embodiment
Embodiment 1
Get 80ml and contain H
2SO
422.30% spent acid is poured in the 250ml beaker, measures 100ml and contains H
2SO
498% sulfuric acid is poured in the above-mentioned beaker while stirring, and the back continuation of having fallen was stirred 5 minutes, and static 1 hour, suction filtration obtained 68%H
2SO
4150ml.
Embodiment 2
Get 90ml and contain H
2SO
422.30% spent acid is poured in the 250ml beaker, measures 100ml and contains H
2SO
498% sulfuric acid is poured in the above-mentioned beaker while stirring, and the back continuation of having fallen was stirred 5 minutes, and static 1 hour, suction filtration obtained 68.5%H
2SO
4140ml.
Embodiment 3
Get 100ml and contain H
2SO
422.30% spent acid is poured in the 250ml beaker, measures 100ml and contains H
2SO
498% sulfuric acid is poured in the above-mentioned beaker while stirring, and the back continuation of having fallen was stirred 5 minutes, and static 1 hour, suction filtration obtained 69.0%H
2SO
4138ml.
Embodiment 4
Get 110ml and contain H
2SO
422.30% spent acid is poured in the 250ml beaker, measures 100ml and contains H
2SO
498% sulfuric acid is poured in the above-mentioned beaker while stirring, and the back continuation of having fallen was stirred 5 minutes, and static 1 hour, suction filtration obtained 69.02%H
2SO
4143ml.
Embodiment 5
Get 120ml and contain H
2SO
422.30% spent acid is poured in the 250ml beaker, measures 100ml and contains H
2SO
498% sulfuric acid is poured in the above-mentioned beaker while stirring, and the back continuation of having fallen was stirred 5 minutes, and static 1 hour, suction filtration obtained 69.5%H
2SO
4145ml.
Claims (3)
1. the treatment process of a titanium white waste acid is characterized in that, it comprises the steps:
(1) titanium white waste acid is precipitated pre-treatment, separate and the recovery solid titanium;
(2) solution that step (1) is obtained and the vitriol oil or fuming acid are mixed, the slaking of 1:0.7 ~ 2 by mass ratio; Carry out solid-liquid separation and can obtain 58 ~ 69% sulfuric acid and ferrous sulfate crystal.
2. the treatment process of titanium white waste acid according to claim 1, it is characterized in that: the concentration of the described vitriol oil is 92 ~ 98%.
3. the treatment process of titanium white waste acid according to claim 1 and 2, it is characterized in that: the described curing time is 0.5 ~ 1.5 hour.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201010511576 CN101973530A (en) | 2010-10-19 | 2010-10-19 | Method for treating waste titanium dioxide acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010511576 CN101973530A (en) | 2010-10-19 | 2010-10-19 | Method for treating waste titanium dioxide acid |
Publications (1)
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CN101973530A true CN101973530A (en) | 2011-02-16 |
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ID=43573447
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CN 201010511576 Pending CN101973530A (en) | 2010-10-19 | 2010-10-19 | Method for treating waste titanium dioxide acid |
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CN (1) | CN101973530A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107010608A (en) * | 2017-05-11 | 2017-08-04 | 梧州圣绿科技有限公司 | A kind of method that utilization titanium white waste acid prepares sulfuric acid |
CN108726491A (en) * | 2018-06-08 | 2018-11-02 | 龙蟒佰利联集团股份有限公司 | A kind of titanium dioxide waste acid by sulfuric acid process membrane processing method |
CN110697792A (en) * | 2019-10-31 | 2020-01-17 | 襄阳龙蟒钛业有限公司 | Method for preparing yellow ferrous iron with controllable particle size by using waste acid from titanium dioxide production |
CN113387334A (en) * | 2021-06-16 | 2021-09-14 | 龙佰四川钛业有限公司 | Concentration and purification method of titanium dioxide waste acid by sulfuric acid process |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1381398A (en) * | 2002-01-25 | 2002-11-27 | 吉林市吉研高新技术开发公司 | Process for recovering waste acid in producing titanium white powder by sulfuric acid method |
CN101157447A (en) * | 2007-09-12 | 2008-04-09 | 合肥泰诺化工科技有限公司 | Method for removing ferrous and other metal salt from titanium white waste acid |
-
2010
- 2010-10-19 CN CN 201010511576 patent/CN101973530A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1381398A (en) * | 2002-01-25 | 2002-11-27 | 吉林市吉研高新技术开发公司 | Process for recovering waste acid in producing titanium white powder by sulfuric acid method |
CN101157447A (en) * | 2007-09-12 | 2008-04-09 | 合肥泰诺化工科技有限公司 | Method for removing ferrous and other metal salt from titanium white waste acid |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107010608A (en) * | 2017-05-11 | 2017-08-04 | 梧州圣绿科技有限公司 | A kind of method that utilization titanium white waste acid prepares sulfuric acid |
CN108726491A (en) * | 2018-06-08 | 2018-11-02 | 龙蟒佰利联集团股份有限公司 | A kind of titanium dioxide waste acid by sulfuric acid process membrane processing method |
CN110697792A (en) * | 2019-10-31 | 2020-01-17 | 襄阳龙蟒钛业有限公司 | Method for preparing yellow ferrous iron with controllable particle size by using waste acid from titanium dioxide production |
CN113387334A (en) * | 2021-06-16 | 2021-09-14 | 龙佰四川钛业有限公司 | Concentration and purification method of titanium dioxide waste acid by sulfuric acid process |
CN113387334B (en) * | 2021-06-16 | 2022-10-28 | 龙佰四川钛业有限公司 | Concentration and purification method of titanium dioxide waste acid by sulfuric acid process |
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Application publication date: 20110216 |