CN108178189B - A method of effectively avoiding titanium liquid premature hydrolysis - Google Patents
A method of effectively avoiding titanium liquid premature hydrolysis Download PDFInfo
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- CN108178189B CN108178189B CN201810191201.2A CN201810191201A CN108178189B CN 108178189 B CN108178189 B CN 108178189B CN 201810191201 A CN201810191201 A CN 201810191201A CN 108178189 B CN108178189 B CN 108178189B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The invention discloses a kind of methods for effectively avoiding titanium liquid premature hydrolysis, comprising the following steps: 1) after disk normal operation, slurry is passed through in disk filter by feed pipe, each leads into low concentration titanium liquid in the two sides of the feed pipe；2) region is washed the one of disk, two wash region and three and wash region and each lead into wash water and washed；3) the low concentration titanium liquid being used as the washing filtrate that two, three wash region in step 1).The present invention is by adding two, three washing the washing filtrate in region and dissolve fine crystals containing certain acidity and titanium concentration when slurry is fed, fine crystals are avoided to block filter cloth, improve disk filtration efficiency, also be avoided that simultaneously leads to titanium liquid premature hydrolysis when adding sand leaching water as disk dilution water because local concentration is too low, the problem of influencing product quality, and it can guarantee the quality of ferrous sulfate, with the dissolution of avoidable big crystal grain ferrous sulfate, the amount of the ferrous sulfate of dissolution is reduced, iron titanium ratio is reduced.
Description
Technical field
The invention belongs to field of titanium dioxide production, and in particular to a method of effectively avoid titanium liquid premature hydrolysis.
Background technique
It is most of that ilmenite concentrate is used to produce titanium dioxide as mineral resources in sulfuric acid method titanium pigment production, due in ilmenite concentrate
Addition reduced iron powder is usually required containing a large amount of ferro element, and in acid hemolysis process to restore ferric iron and be ferrous iron and make titanium
Contain certain density titanous in liquid, titanium liquid is made to keep reducing atmosphere, in case ferrous iron is oxidized.Iron titanium ratio after acidolysis
Usually 0.8, some are even as high as 0.9.The too high quality for being unfavorable for hydrolysis of iron titanium ratio, it usually needs dropped by vacuum crystallization
The content of low ferrous sulfate, is then separated by solid-liquid separation by disk filter, isolates errous sulfate crystal from titanium liquid
Come, to reduce iron titanium ratio.
But the ferrous sulfate crystallite size wider distribution usually crystallized out usually filters one containing thinner particle
Or so a hour, tiny particle can block the filter cloth of disk filter, and slurry has turned over half disc sometimes, above
Titanium liquid is not drained also, can not washes clean when rear end addition wash water being caused to wash ferrous sulfate.Worker usually only stops
The operation of rotation stop platform, is rinsed with water filter cloth, then restarts.Labor intensity of workers is larger, and influences production production capacity, and sulfuric acid is sub-
The quality of iron not can guarantee yet, it sometimes appear that the residual titanium of ferrous sulfate and water content are higher.If made by addition sand leaching water
Part of sulfuric acid ferrous iron microlite, although the runing time of disk can be extended, the addition one of sand leaching water are dissolved for dilution water
Aspect can largely dissolve errous sulfate crystal, improve the iron content in titanium liquid；On the other hand may also be too low because of local concentration,
So that the risk of titanium liquid premature hydrolysis is improving.Disc area is washed, two wash, three wash region, and one washes the filtrate titanium liquid in region
Concentration is higher, can be directly incorporated into slurry filtrate, and two wash with three wash region washing filter liquor concentration it is lower, usually
40-100g/L can be used as dilution water use: on the one hand can dissolve ferrous sulfate microlite, another party containing certain acid concentration
Face greatly reduces the risk of titanium liquid premature hydrolysis.
Summary of the invention
In view of the above shortcomings of the prior art, the present inventor washes region by using disk filtration two, three
Washing filtrate the ferrous sulfate microlite of part is dissolved as dilution water, thus improve disk filtration efficiency and reduce sulfuric acid
Ferrous residual titanium greatly reduces the general of titanium liquid premature hydrolysis generation simultaneously because containing certain density sulfuric acid in dilution water
Rate.
The present invention provides a kind of methods for effectively avoiding titanium liquid premature hydrolysis, comprising the following steps:
1) after disk normal operation, slurry is passed through in disk filter by feed pipe, the two of the feed pipe
Side each leads into low concentration titanium liquid；
2) region is washed the one of disk, two wash region and three and wash region and each lead into wash water and washed；
3) the low concentration titanium liquid being used as the washing water that two, three wash region in step 1).
Under preferable case, in step 1), the inlet amount of slurry is 30-80m3The intake of/h, low concentration titanium liquid is
2.5-7m3/h。
Preferably, the revolving speed of disk is 1-5min/r in disk filter.
In the present invention, a wash water intake for washing region can be 0.5-3m3/ h, two wash region wash water intake can be
1.5-4m3/ h, the three wash water intakes for washing region can be 1-3m3/h。
A kind of preferred embodiment according to the invention, a method of titanium liquid premature hydrolysis effectively being avoided, including following
Step: the inlet amount of disk filter slurry is 30-80m3/ h each leads into 2.5- in slurry feed pipe two sides
7m3The low concentration titanium liquid of/h, disc rotation speed 1-5min/r wash region in disk one and are passed through 0.5-3m3The wash water of/h, two wash area
Domain is passed through 1.5-4m3The wash water of/h, three, which wash region, is passed through 1-3m3The wash water of/h, through detecting, using the Asia of sulfuric acid made from this method
The residual titanium of iron is 0.5% hereinafter, moisture content is 18-22%, titanium concentration 150-160g/L.
Compared with prior art, the present invention has following beneficial to point:
It is dissolved as dilution water carefully using method of the invention by adding low concentration titanium liquid when slurry is fed
Small crystals avoids fine crystals from blocking filter cloth, to improve the air penetrability of filter cloth, improves and filters effect, just needs within average 6-7 hours
A disk is cleaned, the residual titanium and moisture content of ferrous sulfate are relatively stable；Because low concentration titanium liquid contains certain density sulphur
Acid greatly reduces the probability of titanium liquid premature hydrolysis generation, and since low concentration titanium liquid also contains a certain amount of ferrous sulfate,
It can reduce after acid-bearing wastewater dissolved thin errous sulfate crystal, continue the amount for dissolving big errous sulfate crystal, so as to one
Determine the iron titanium ratio of the reduction titanium liquid of degree.In addition, the washing filtrate that two, three wash region is used as low concentration titanium liquid, object is realized
Recycling for material, avoids the wasting of resources.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment 1
The present embodiment is used to illustrate the method for effectively avoiding titanium liquid premature hydrolysis of the invention.
Specifically includes the following steps:
After disk normal operation, the inlet amount of disk filter slurry is 30m3/ h, in slurry feed pipe two
Side each leads into 2.5m3The low concentration titanium liquid of/h, disc rotation speed 2min/r wash region in disk one and are passed through 1m3The wash water of/h,
Two, which wash region, is passed through 1.5m3The wash water of/h, three, which wash region, is passed through 1.5m3The wash water of/h, and the washing filtrate for washing region two, three
It isolates and is used as low concentration titanium liquid.Just disk filter cloth need to once be cleaned every 8 hours, through detecting, using the party
The residual titanium of ferrous sulfate made from method is 0.2%, moisture content 20%, titanium concentration 150g/L.
Embodiment 2
The present embodiment is used to illustrate the method for effectively avoiding titanium liquid premature hydrolysis of the invention.
Specifically includes the following steps:
After disk normal operation, the inlet amount of disk filter slurry is 50m3/ h, in slurry feed pipe two
Side each leads into 4m3The low concentration titanium liquid of/h, disc rotation speed 3min/r wash region in disk one and are passed through 3m3The wash water of/h, two
It washes region and is passed through 2m3The wash water of/h, three, which wash region, is passed through 2m3The wash water of/h, and the washing filtrate that two, three wash region is isolated
To be used as low concentration titanium liquid.Just disk filter cloth need to once be cleaned every 7 hours, through detecting, be made using this method
Ferrous sulfate residual titanium be 0.3%, moisture content 18%, titanium concentration 155g/L.
Embodiment 3
The present embodiment is used to illustrate the method for effectively avoiding titanium liquid premature hydrolysis of the invention.
Specifically includes the following steps:
After disk normal operation, the inlet amount of disk filter slurry is 80m3/ h, in slurry feed pipe two
Side each leads into 6m3The acid-bearing wastewater of/h, disc rotation speed 4min/r wash region in disk one and are passed through 3m3The wash water of/h, two wash
Region is passed through 3m3The wash water of/h, three, which wash region, is passed through 2m3The wash water of/h, and the washing filtrate that two, three wash region is isolated
As low concentration titanium liquid.Just disk filter cloth need to once be cleaned every 7 hours, through detecting, using made from this method
The residual titanium of ferrous sulfate is 0.3%, moisture content 20%, titanium concentration 160g/L.
Comparative example 1
After disk normal operation, the inlet amount of disk filter slurry is 30m3/ h, disc rotation speed 2min/r, In
Disk one washes region and is passed through 1m3The wash water of/h, two, which wash region, is passed through 1.5m3The wash water of/h, three, which wash region, is passed through 1.5m3/ h's washes
Water.Every a hour, need to carry out once flushing to disk filter cloth, through detecting, using ferrous sulfate made from this method
Residual titanium is 0.7%, moisture content 26%, titanium concentration 150g/L.
Compared with comparative example 1, the production capacity of disk filter can be effectively improved using method of the invention, average 6-7 is small
Shi Caixu clean a disk, the residual titanium and moisture content of ferrous sulfate are relatively stable, and the concentration of titanium liquid will not under
Drop.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of illustrated embodiment, for the art
Many modifications and changes are obvious for those of ordinary skill.
Claims (3)
1. a kind of method for effectively avoiding titanium liquid premature hydrolysis, which comprises the following steps:
1) after disk normal operation, slurry is passed through in disk filter by feed pipe, in the two sides of the feed pipe point
It is not passed through low concentration titanium liquid, the inlet amount of slurry is 30-80m3/ h, the intake of the low concentration titanium liquid are 2.5-7m3/
h；
2) region is washed the one of disk, two wash region and three and wash region and each lead into wash water and washed；
3) the low concentration titanium liquid being used as the washing filtrate that two, three wash region in step 1).
2. the method according to claim 1 for effectively avoiding titanium liquid premature hydrolysis, it is characterised in that: the revolving speed of disk is 1-
5min/r。
3. the method according to claim 1 for effectively avoiding titanium liquid premature hydrolysis, it is characterised in that: one washes the wash water in region
Intake is 0.5-3m3/ h, the two wash water intakes for washing region are 1.5-4m3/ h, the three wash water intakes for washing region are 1-3m3/
h。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810191201.2A CN108178189B (en) | 2018-03-08 | 2018-03-08 | A method of effectively avoiding titanium liquid premature hydrolysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810191201.2A CN108178189B (en) | 2018-03-08 | 2018-03-08 | A method of effectively avoiding titanium liquid premature hydrolysis |
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| CN108178189A CN108178189A (en) | 2018-06-19 |
| CN108178189B true CN108178189B (en) | 2019-11-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390618A (en) * | 2001-06-12 | 2003-01-15 | 平果铝业公司 | Methd for improving filtrate distributing tray of horizontal disk filter |
| CN102814073A (en) * | 2012-09-02 | 2012-12-12 | 洛阳市豫瑞机械制造有限公司 | Horizontal disc filter applied in alkali making industry |
| CN103213961A (en) * | 2012-05-18 | 2013-07-24 | 襄阳泽东化工有限公司 | Closed cyclic utilization method for production water of monoammonium phosphate |
| CN103848407A (en) * | 2013-04-02 | 2014-06-11 | 襄阳泽东化工集团有限公司 | Monoammonium phosphate production method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3978303B2 (en) * | 2000-04-07 | 2007-09-19 | シャープ株式会社 | Waste water treatment method and waste water treatment equipment |
-
2018
- 2018-03-08 CN CN201810191201.2A patent/CN108178189B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390618A (en) * | 2001-06-12 | 2003-01-15 | 平果铝业公司 | Methd for improving filtrate distributing tray of horizontal disk filter |
| CN103213961A (en) * | 2012-05-18 | 2013-07-24 | 襄阳泽东化工有限公司 | Closed cyclic utilization method for production water of monoammonium phosphate |
| CN102814073A (en) * | 2012-09-02 | 2012-12-12 | 洛阳市豫瑞机械制造有限公司 | Horizontal disc filter applied in alkali making industry |
| CN103848407A (en) * | 2013-04-02 | 2014-06-11 | 襄阳泽东化工集团有限公司 | Monoammonium phosphate production method |
Non-Patent Citations (1)
| Title |
|---|
| 中国产圆盘真空过滤机在钛白粉生产中的应用;唐文骞;《无机盐工业》;20040731;第36卷(第4期);第56页右栏第1-2段 * |
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Address after: 618200 Deyang city of Sichuan province Mianzhu new City Industrial Development Zone Sichuan Lomon titanium industry Limited by Share Ltd Patentee after: Longbai Sichuan Titanium Co., Ltd Address before: 618200 Deyang city of Sichuan province Mianzhu new City Industrial Development Zone Sichuan Lomon titanium industry Limited by Share Ltd Patentee before: SICHUAN LOMON TITANIUM Co.,Ltd. |
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