CN106395781A - Novel dehydration method of calcium hydrogen phosphate product slurry - Google Patents
Novel dehydration method of calcium hydrogen phosphate product slurry Download PDFInfo
- Publication number
- CN106395781A CN106395781A CN201610789286.5A CN201610789286A CN106395781A CN 106395781 A CN106395781 A CN 106395781A CN 201610789286 A CN201610789286 A CN 201610789286A CN 106395781 A CN106395781 A CN 106395781A
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- CN
- China
- Prior art keywords
- adhesive tape
- vacuum
- product slip
- calcium monophosphate
- vacuum filtration
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- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
Abstract
The invention discloses a novel dehydration method of calcium hydrogen phosphate product slurry. The method includes the following 4 steps: material distribution, first dehydration, second material distribution and second dehydration. The four steps are mainly carried out through an adhesive tape filter, which consists of a vacuum filtration box, an adhesive tape located above the vacuum filtration box and an adhesive tape machine controlling the adhesive tape rotation. Specifically, the adhesive tape thickness is greater than or equal to 40mm, the adhesive tape moving speed is 0.08-0.1m/s; the vacuum gas pumping amount of the vacuum filtration box is set at 7-8m<3>/m<2>, the vacuum degree is 0.06MPa, and the total length of the vacuum filtration box is 6-7m. The method provided by the invention has the advantages of good dehydration effect, simple operation, high automation performance, low production and running cost, and small safety risk, etc., thus being suitable for popularization and application.
Description
Technical field
The present invention relates to a kind of dewatering is and in particular to a kind of dewatering method of calcium monophosphate product slip.
Background technology
Calcium monophosphate product slip is usually by phosphoric acid defluorination (P2O5Concentration about 60～80g/l) and lime cream (grey milk density
1.07～1.0) it is neutralized reaction and produces the product slip obtaining, its water content is high, dehydration obtains final product semi-finished product.Because of device configuration
Difference, material crystallographic differences, the difference of operational control, ordinary circumstance moisture Control, between 20～30%, all can enter baking oven
Dry.
In industry, the generic way of calcium monophosphate product slurry dewatering is：Pre-concentration is carried out using thickener or concentrator,
Separated with centrifuge again, finally dry.Wherein, centrifuge from the link-suspended basket centrifuge in past, hang by upper to the later stage
Formula centrifuge, all because personnel depaly is many, high labor intensive, and be progressively replaced by the high full-automatic flat scraper of automatization's intensity from
Scheming.However, because be usually used centrifuge roller diameter be Ф 1000, Ф 1250, Ф 1350, less use Ф 1500
, the in addition difference of slip pre-concentration effect, separate unit treating capacity in 1t～1.3t/h, therefore 100,000 tons devices need to configure 10 with
On suspended centrifuge, the configuration of full-automatic flat scraper centrifuge also needs more, and its frequency of maintenance is high, and maintenance cost is also high,
Meanwhile, also need to consider configuration surplus capacity.And, centrifuge speed, more than 1000 turns, because bowl bursts, is gone through in industry
The death by accident more than 10 occurring over year rises, countless of personal injury accident, and security risk is big.In addition, centrifuge is detached
When mother solution usually contains material and the centrifuge cloth partly wearing filter, the material of overflow, is sunk frequently with thickener or concentrator
Shallow lake separating treatment, is simultaneously introduced flocculant, and thick paste and pre-concentration slip together return centrifuge dehydration again, and thick paste collocation needs uniformly,
Operating difficultiess, then it is high to be dehydrated difficulty.
Content of the invention
The invention aims to solving the above problems, provide a kind of dewatering side of calcium monophosphate product slip
Method, it is excellent that the method has that dehydrating effect is good, simple to operate, automatization's performance strong, production run low cost, security risk are little etc.
Point.
For achieving the above object, the technical solution used in the present invention is as follows：
The dewatering method of calcium monophosphate product slip, comprises the steps：
(1) cloth：Calcium monophosphate product slip is uniformly laid in the area of cloth on adhesive tape above vacuum filtration box；
, within 2m, described fabric thickness is in more than 3cm for the length of described area of cloth；
(2) primary dewatering：Adhesive tape with calcium monophosphate product slip is turned to behind sucking filtration region, vacuum filtration box pair
Calcium monophosphate product slip carries out sucking filtration, obtains the filtrate A that the material A above adhesive tape and sucking filtration go out；Described vacuum filtration box
Vacuum suction amount is configured to 6～9m3/m2, vacuum is 0.04～0.06MPa；
(3) secondary material distributing：Adhesive tape with material A is turned to behind secondary material distributing region, is sent to after filtrate A is pressurizeed
Above adhesive tape, pressure flush is carried out to material A, to eliminate the crack performance of material, obtains material B, then carry out secondary material distributing,
The length in described secondary material distributing region is 1.5m, and described fabric thickness is in more than 3cm；
(4) second dehydration：Adhesive tape with material B is turned to secondary sucking filtration region sucking filtration, obtain water content be 25～
28% dehydrated material, and detached liquor B again need not be carried out；The vacuum suction amount of described vacuum filtration box is configured to 6～
9m3/m2, vacuum is 0.04～0.06MPa.
Specifically, described tape thickness is more than 40mm, and adhesive tape translational speed is in 0.08～0.1m/s.
Specifically, described vacuum filtration box total length is 6～7m.
Preferably, the area of cloth in described step (1) is 1m.
Preferably, the secondary material distributing region in described step (4) does not carry out vacuum filtration.
Preferably, the vacuum suction amount of described vacuum filtration box is 6～9m3/m2, vacuum is 0.06MPa.
Compared with prior art, the invention has the advantages that：
(1) dewatering of the present invention is simple, and automatization's performance is high, and can reduce pre-concentration process, saves equipment fortune
Row expense and running cost, meanwhile, the dehydrated material water content after dehydration reaches 25～28%, can directly enter baking oven dry become
Product calcium monophosphate product.
(2) the vacuum filtration box length of the present invention only has 6～7m, shortens whole length, reduces rubber belt from deviating probability, enter
One step ensure that the normal operation of equipment, it furthermore reduces frequency of maintenance, saves maintenance cost；Meanwhile, the present invention's is de-
Water method carries out secondary sucking filtration, good separating effect using subregion mode, on the one hand, add a sucking filtration in secondary sucking filtration
The filtrate A going out, can effectively eliminate the crack performance of material A, effectively prevent vacuum leak further；On the other hand, two grades of sucking filtration
Filtrate afterwards is limpid, the slightly visible fine particle of naked eyes, reduces mother liquid disposal operating cost, solves the collocation of mother solution thick paste and disappears
Change difficult problem.
(3) equipment investment applied in the dewatering of the present invention is low, less energy consumption, scrapes with full-automatic flat board with scale set
Knife centrifuge is compared, and invests saving 40%, and can save the installed capacity of 150kw taking 100,000 tons of devices as a example.The inventive method
Have the advantages that dehydrating effect is good, simple to operate, automatization's performance is strong, production run low cost, security risk are little, can promote makes
With.
Brief description
Fig. 1 is the FB(flow block) of the inventive method.
Specific embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings, and the mode of the present invention includes but not only limits
In following examples.
The embodiment of the present invention is to provide for that a kind of investment is low, high degree of automation, less energy consumption, dehydrating effect are good, operation is simple
Just and the secure calcium monophosphate product slip of safety dewatering method.
As shown in figure 1, the dewatering method of the calcium monophosphate product slip of the present embodiment offer, mainly pass through adhesive tape
Filter filters and to be dehydrated, described adhesive tape filter include vacuum filtration box, be located at adhesive tape above vacuum filtration box,
And control the sealing-tape machine of adhesive tape rotation；Described vacuum filtration box is divided into four regions, is followed successively by area of cloth, a sucking filtration
Area, secondary material distributing area and secondary sucking filtration area；Wherein, the configurating filtered power of sealing-tape machine is in 200kw, described tape thickness 40mm with
On, adhesive tape translational speed is between 0.08～0.1m/s；Described vacuum filtration box total length is 6～7m.
Embodiment 1
The dewatering of the present embodiment comprises the steps：
(1) cloth：Calcium monophosphate product slip is uniformly laid in the area of cloth on adhesive tape；Described area of cloth
, within 2m, described fabric thickness is in more than 3cm for length；
(2) primary dewatering：Adhesive tape with calcium monophosphate product slip is turned to behind a sucking filtration area, uses vacuum filtration
Box carries out sucking filtration to calcium monophosphate product slip, obtains the filtrate A that the material A above adhesive tape and sucking filtration go out；Crystallize relatively in material
During difference, after entering a sucking filtration area, 1～2m can reach naked eyes not water breakthrough；In material advantages of good crystallization, entering a sucking filtration area can
Moment reaches visually the effect of not water breakthrough；The vacuum suction amount of described vacuum filtration box is configured to 6～9m3/m2, vacuum is
0.04MPa；
(3) secondary material distributing：Adhesive tape with material A is turned to behind secondary material distributing area, for further filter liquor A, with
When prevent or prevent material that crack performance occurs, thus leading to the generation of vacuum leak phenomenon, by filtrate A pressurize after be sent to glue
Above band, pressure flush is carried out to material A, obtain material B, then carry out secondary material distributing, the length in described secondary material distributing region
For 1.5m, described fabric thickness is in more than 3cm；During secondary material distributing, do not carry out sucking filtration；
(4) second dehydration：Adhesive tape with material B is turned to secondary sucking filtration region sucking filtration, obtaining water content is 28%
Dehydrated material, and detached liquor B again need not be carried out；The vacuum suction amount of described vacuum filtration box is configured to 6～9m3/
m2, vacuum is 0.04MPa.
Embodiment 2
The dewatering method of the calcium monophosphate product slip of the present embodiment, comprises the steps：
(1) cloth：Calcium monophosphate product slip is uniformly laid in the area of cloth on adhesive tape above vacuum filtration box；
The length of described area of cloth is 1m, and described fabric thickness is in more than 3cm；
(2) primary dewatering：After adhesive tape with calcium monophosphate product slip turns to sucking filtration region, vacuum filtration box is to phosphorus
Sour hydrogen calcium product slip carries out sucking filtration, obtains the liquor C that the material C above adhesive tape and sucking filtration go out；Described vacuum filtration box true
Empty rate of air sucked in required is configured to 7～8m3/m2, vacuum is 0.06MPa；
(3) secondary material distributing：Adhesive tape with material C is turned to behind secondary material distributing region, passes after liquor C is pumped up
Deliver to above adhesive tape, pressure flush is carried out to material C, to eliminate the crack performance of material, obtain material D, then carry out secondary
Cloth, the length in described secondary material distributing region is 1.5m, and described fabric thickness is 3cm；
(4) second dehydration：Adhesive tape with material D is turned to secondary sucking filtration region sucking filtration, obtaining water content is 25%
Dehydrated material, and detached filtrate D again need not be carried out；The vacuum suction amount of described vacuum filtration box is configured to 7～8m3/
m2, vacuum is 0.06MPa.
Above-described embodiment is visible, and when the vacuum of vacuum filtration box is 0.06MPa, dehydrating effect is good；Above-described embodiment
The mode that dewatering all employs sucking filtration twice is carried out, good separating effect, on the one hand, add a sucking filtration in secondary sucking filtration
The filtrate going out, can effectively eliminate the crack performance of material, effectively prevent vacuum leak further；On the other hand, after two grades of sucking filtration
Filtrate limpid, the slightly visible fine particle of naked eyes, reduce mother liquid disposal operating cost, solve the collocation digestion of mother solution thick paste
Difficult problem.
Meanwhile, the adhesive tape filter of above-described embodiment invests low, less energy consumption, with scale set and full-automatic flat scraper from
Scheming is compared, and invests saving 40%, and can save the installed capacity of 150kw taking 100,000 tons of devices as a example.And adopt this adhesive tape type
The method that filter is dehydrated has that dehydrating effect is good, simple to operate, automatization's performance strong, production run low cost, safety
The advantages of risk is little, can promote the use of.
Above-described embodiment is only the preferred embodiment of the present invention, should not be taken to limit protection scope of the present invention, but
All body design thought in the present invention and change or the polishing of having no essential meaning mentally made, its technology being solved
Problem is still consistent with the present invention, all should be included within protection scope of the present invention.
Claims (6)
1. the dewatering method of calcium monophosphate product slip is it is characterised in that comprise the steps：
(1) cloth：Calcium monophosphate product slip is uniformly laid in the area of cloth on adhesive tape above vacuum filtration box；Described
, within 2m, described fabric thickness is in more than 3cm for the length of area of cloth；
(2) primary dewatering：Adhesive tape with calcium monophosphate product slip is turned to behind sucking filtration region, vacuum filtration box is to phosphoric acid
Hydrogen calcium product slip carries out sucking filtration, obtains the filtrate A that the material A above adhesive tape and sucking filtration go out；The vacuum of described vacuum filtration box
Rate of air sucked in required is configured to 6～9m3/m2, vacuum is 0.04～0.06MPa；
(3) secondary material distributing：Adhesive tape with material A is turned to behind secondary material distributing region, after filtrate A is pressurizeed, is sent to adhesive tape
Top, carries out pressure flush to material A, to eliminate the crack performance of material, obtains material B, then carries out secondary material distributing, described
The length in secondary material distributing region is 1.5m, and described fabric thickness is in more than 3cm；
(4) second dehydration：Adhesive tape with material B is turned to secondary sucking filtration region sucking filtration, obtaining water content is 25～28%
Dehydrated material, and detached liquor B again need not be carried out；The vacuum suction amount of described vacuum filtration box is configured to 6～9m3/
m2, vacuum is 0.04～0.06MPa.
2. the dewatering method of calcium monophosphate product slip according to claim 1 is it is characterised in that described adhesive tape is thick
Spend for more than 40mm, adhesive tape translational speed is between 0.08～0.1m/s.
3. the dewatering method of calcium monophosphate product slip according to claim 1 is it is characterised in that described vacuum is taken out
Filter box total length is 6～7m.
4. the dewatering method of calcium monophosphate product slip according to claim 1 is it is characterised in that described step
(1) area of cloth in is 1m.
5. the dewatering method of calcium monophosphate product slip according to claim 1 is it is characterised in that described step
(4) the secondary material distributing region in does not carry out vacuum filtration.
6. the dewatering method of calcium monophosphate product slip according to claim 1 is it is characterised in that described vacuum is taken out
The vacuum suction amount of filter box is 7～8m3/m2, vacuum is 0.06MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610789286.5A CN106395781B (en) | 2016-08-31 | 2016-08-31 | The dewatering of calcium monophosphate product slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610789286.5A CN106395781B (en) | 2016-08-31 | 2016-08-31 | The dewatering of calcium monophosphate product slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106395781A true CN106395781A (en) | 2017-02-15 |
| CN106395781B CN106395781B (en) | 2018-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610789286.5A Active CN106395781B (en) | 2016-08-31 | 2016-08-31 | The dewatering of calcium monophosphate product slurry |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06122510A (en) * | 1991-10-22 | 1994-05-06 | Meito Sangyo Kk | Method for producing hexacalcium phosphate |
| CN101591031A (en) * | 2008-05-26 | 2009-12-02 | 贵阳铝镁设计研究院 | Preparation process for high-white aluminum hydroxide |
| CN102992292A (en) * | 2012-12-21 | 2013-03-27 | 辽宁金锚实业有限公司 | Production technology and application of calcium hydrophosphate |
| CN103349860A (en) * | 2013-06-28 | 2013-10-16 | 洛阳建浩重工机械有限公司 | Production process of band type vacuum filter capable of saving water |
| CN104591252A (en) * | 2015-01-05 | 2015-05-06 | 安徽新中远化工科技有限公司 | Purification treatment method of phosphogypsum |
| CN105797462A (en) * | 2014-12-30 | 2016-07-27 | 天津市鑫泽精细化工有限责任公司 | Crawler type vacuum pumping filter |
-
2016
- 2016-08-31 CN CN201610789286.5A patent/CN106395781B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06122510A (en) * | 1991-10-22 | 1994-05-06 | Meito Sangyo Kk | Method for producing hexacalcium phosphate |
| CN101591031A (en) * | 2008-05-26 | 2009-12-02 | 贵阳铝镁设计研究院 | Preparation process for high-white aluminum hydroxide |
| CN102992292A (en) * | 2012-12-21 | 2013-03-27 | 辽宁金锚实业有限公司 | Production technology and application of calcium hydrophosphate |
| CN103349860A (en) * | 2013-06-28 | 2013-10-16 | 洛阳建浩重工机械有限公司 | Production process of band type vacuum filter capable of saving water |
| CN105797462A (en) * | 2014-12-30 | 2016-07-27 | 天津市鑫泽精细化工有限责任公司 | Crawler type vacuum pumping filter |
| CN104591252A (en) * | 2015-01-05 | 2015-05-06 | 安徽新中远化工科技有限公司 | Purification treatment method of phosphogypsum |
Non-Patent Citations (1)
| Title |
|---|
| 南君芳等: "《金精矿培烧预处理冶炼技术》", 31 January 2010, 冶金工业出版社 * |
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| CN106395781B (en) | 2018-11-09 |
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