CN108358230A - A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite - Google Patents
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite Download PDFInfo
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- CN108358230A CN108358230A CN201810356190.9A CN201810356190A CN108358230A CN 108358230 A CN108358230 A CN 108358230A CN 201810356190 A CN201810356190 A CN 201810356190A CN 108358230 A CN108358230 A CN 108358230A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/24—Magnesium carbonates
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Abstract
The present invention relates to technical field of inorganic chemical industry, specifically a kind of method calcined mid low grade phosphate rock ammonium salt leachate direct carbonization and prepare miemite.The CO that the present invention is calcined using phosphorus ore2The NH generated in gas, phosphorus ore thermal decomposition product leaching process3Gas is reacted with calcining mid low grade phosphate rock ammonium salt leachate jointly, makes calcining mid low grade phosphate rock ammonium salt leachate that wherein calcium and magnesium be made to form miemite precipitation.Ammonium nitrate is used only in the present invention or ammonium chloride solution recycles, and ammonium nitrate is lossless, also avoids newly introducing moisture to the circulatory system；The production capacity of granularity control and raising pressure filtration washing when the present invention synthesizes convenient for miemite；The NH used in the present invention3Gas source reacts in thermal decomposition product with ammonium nitrate or ammonium chloride solution, CO2It calcines to obtain thermal decomposition product from phosphorus ore, to needing the exhaust gas discharged to be recycled during original production, has not only reduced exhaust gas discharge, but also saved cost of material.
Description
Technical field
The present invention relates to technical field of inorganic chemical industry, the direct carbon of specifically a kind of calcining mid low grade phosphate rock ammonium salt leachate
The method that change prepares miemite.
Background technology
Phosphate rock resource is the important strategic resource of country, is the material base of phosphorus chemical industry, have it is non-renewable, I
State's phosphate rock resource is abundant, but 80% or more is to be difficult to the mid low grade phosphate rock directly utilized.
With a large amount of utilization of phosphate rock resource, phosphorous chemical industry raw materials for production will have to rely on mid low grade phosphate rock, in
Low-grade phosphate ore is the enrichment of phosphorus and the removing of impurity magnesium using the key of technology, and existing beneficiation method phosphor resource utilizes
Rate is low, the generation of a large amount of tailings brings huge environmentally friendly risk.Mid low grade phosphate rock is explored to be chemically treated to obtain the low magnesium phosphorus essence of high-quality
Mine, calcium and magnesium recycling are sustainable to promoting the high-efficiency cleaning of sulphur dioxide of phosphor chemical industry phosphate rock resource to utilize, realizing without tailings discharging
Development has great importance.
Currently, ammonium salt liquid (ammonium nitrate, ammonium chloride, sulphur after calcining is usually taken to mid low grade phosphate rock processing in the prior art
Sour ammonium etc.) wherein calcium and magnesium method is leached, high-quality phosphorus concentrate (P is obtained with enrichment2O5Mass fraction is up to 35-38% or more, MgO
≤ 1.5%) sal volatile, is typically added into leachate, to precipitate calcium and magnesium and ammonium salt liquid made to be regenerated recycling,
But since sal volatile is typically to be made using the method for weak aqua ammonia absorbing carbon dioxide, carbonic acid ammonium concentration low strap enters a large amount of water
After part causes precipitation calcium and magnesium, regeneration ammonium salt solution moisture is more, and concentration is relatively low, recycles difficult.
Invention content
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of calcining mid low grade phosphate rock ammonium
The method that salt leachate direct carbonization prepares miemite, includes the following steps：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas, main generation is following anti-during this
It answers：CaCO3·MgCO3=CaO+MgO+2CO2；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution (or ammonium chloride solution), obtained containing calcium and magnesium salt
Calcining mid low grade phosphate rock ammonium salt leachate and NH3Gas, the main following reaction of generation during this：
CaO+MgO+2H2O=Ca (OH)2+Mg(OH)2；
Ca(OH)2+2NH4NO3=Ca (NO3)2+2NH3+2H2O；
Mg(OH)2+2NH4NO3=Mg (NO3)2+2NH3+2H2O；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, and calcining mid low grade phosphate rock ammonium salt is made to leach
Liquid carbonization precipitation calcium and magnesium, obtains miemite, the main following reaction of generation during this：Ca(NO3)2+Mg(NO3)2+4NH3+
2CO2+2H2O=CaCO3+Mg CO3+4NH4NO3。
The step (2) controls temperature when thermal decomposition product to be mixed to leaching with ammonium nitrate solution or ammonium chloride solution
25-95 DEG C, the ammonia of generation is collected, it is 6.5-9.5 to make pH of leaching solution.
It is described to collect the ammonia generated, it is after mixing thermal decomposition product with ammonium nitrate solution or ammonium chloride solution, to be placed in suction
Receive the ammonia that cyclic absorption leaching generates in tower.The absorption efficiency on absorption tower is higher and uptake is larger.
The step (3), at 25-80 DEG C, control of reaction end point pH value is 7.5-9.0 for reaction temperature control.
The CO that mid low grade phosphate rock is calcined2Gas is passed through low in calcining again after purification and impurity removal
In grade phosphorus mine ammonium salt leachate, to keep CO2Gas it is pure, avoid introducing new impurity.
Further include step (4), the mixture that step (3) is obtained, after being separated by filtration miemite precipitation, filtrate is nitric acid
Filtrate is returned to leaching system and recycled by ammonium salt solution, and miemite obtains finished product after precipitating washed filtering drying.Ammonium nitrate or
Ammonium chloride solution recycling can effectively reduce discharge of wastewater, and cost-effective.
It is described to be separated by filtration miemite, it is to detach miemite using plate and frame filter press.Plate and frame type filter-press is a kind of
Intermittent solid-liquid separating equipment is to be arranged to make up filter chamber by filter plate, filter frame, and under the pressure effect of dehvery pump, feed liquid is sent into
Each filter chamber is detached solid and liquid by filter medium, with good separating effect, applied widely, easy to operate, investment
The advantages that few, the especially separation to sticking thin material, there is incomparable superiority.
Compared with prior art, the technique effect of the invention is embodied in：
The CO that the present invention is calcined using mid low grade phosphate rock2It is produced in gas, phosphorus ore thermal decomposition product leaching process
Raw NH3Gas is reacted with calcining mid low grade phosphate rock ammonium salt leachate jointly, and calcining mid low grade phosphate rock ammonium salt is made to soak
Going out liquid makes wherein calcium and magnesium form miemite precipitation.
The present invention has the following advantages：(1) ammonium nitrate is used only in the present invention or ammonium chloride solution recycles, and ammonium nitrate is lossless,
Moisture will not be newly introduced to the circulatory system, avoid and cause moisture to increase every time since ammonium salt liquid and sal volatile being added every time
Add, results in the need for just continuing cycling through after being concentrated by evaporation；(2) present invention convenient for granularity control when miemite synthesis and improves pressure
The production capacity of filter washing；(3) NH used in the present invention3Gas source is anti-in thermal decomposition product and ammonium nitrate or ammonium chloride solution
It answers, CO2It calcines to obtain thermal decomposition product from phosphorus ore, to needing the exhaust gas discharged to be recycled during original production, both
Reduce exhaust gas discharge, and saves cost of material.
Description of the drawings
Fig. 1 is the flow diagram of the present invention.
Specific implementation mode
It is limited with reference to specific embodiment technical scheme of the present invention is further, but claimed
Range describes made by being not only limited to.
Embodiment 1
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls temperature 45 C, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 8.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, and reaction temperature is controlled 45
DEG C, control of reaction end point pH value is 8, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains miemite；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium nitrate solution, will be filtered
Liquid returns to leaching system and recycles, and miemite obtains finished product after precipitating washed filtering drying.
Embodiment 2
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls 25 DEG C of temperature, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 6.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, and reaction temperature is controlled 25
DEG C, control of reaction end point pH value is 6.5, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains calcium carbonate
Magnesium；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium nitrate solution, will be filtered
Liquid returns to leaching system and recycles, and miemite obtains finished product after precipitating washed filtering drying.
Embodiment 3
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls 95 DEG C of temperature, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 9.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, and reaction temperature is controlled 80
DEG C, control of reaction end point pH value is 9.0, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains calcium carbonate
Magnesium；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium nitrate solution, will be filtered
Liquid returns to leaching system and recycles, and miemite obtains finished product after precipitating washed filtering drying.
Embodiment 4
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas, to CO2Gas carries out purification and impurity removal；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls temperature 45 C, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 8.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO after the purification and impurity removal for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas
The NH that body and step (2) obtain3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, reaction temperature
At 45 DEG C, control of reaction end point pH value is 8 for degree control, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains
To miemite；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium nitrate solution, will be filtered
Liquid returns to leaching system and recycles, and miemite obtains finished product after precipitating washed filtering drying.
Embodiment 5
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls temperature 45 C, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 8.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, and reaction temperature is controlled 45
DEG C, control of reaction end point pH value is 8, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains miemite；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation using plate and frame filter press, filtrate is
Filtrate is returned to leaching system and recycled by ammonium nitrate solution, and miemite obtains finished product after precipitating washed filtering drying.
Embodiment 6
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium chloride solution solution, controls temperature 45 C, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 8.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2Gas and step (2)
Obtained NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, is reacted, and reaction temperature is controlled 45
DEG C, control of reaction end point pH value is 8, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium, obtains miemite；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium chloride solution, will be filtered
Liquid returns to leaching system and recycles, and miemite obtains finished product after precipitating washed filtering drying.
Comparative example 1
A method of calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, including walks as follows
Suddenly：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution solution, controls temperature 45 C, in being followed in absorption tower
Ring absorbs the NH generated3Gas, it is 8.5 to make pH of leaching solution, obtains the calcining mid low grade phosphate rock ammonium salt leaching containing calcium and magnesium salt
Go out liquid and NH3Gas, and by NH3Gas is passed through control ammonia concn 18-25% in water, obtains weak aqua ammonia, step (1) is obtained
CO2Gas is passed through in weak aqua ammonia, obtains dilute sal volatile, is collected for use；
(3) obtained calcining mid low grade phosphate rock ammonium salt leachate is mixed with dilute sal volatile, is reacted, reacted
At 45 DEG C, control of reaction end point pH value is 8 for temperature control, makes calcining mid low grade phosphate rock ammonium salt leachate carbonization precipitation calcium and magnesium,
Obtain miemite；
(4) mixture for obtaining step (3), after being separated by filtration miemite precipitation, filtrate is ammonium nitrate solution, will be filtered
Liquid carries out low temperature concentration, until its volume reduces 20-40%, returns to leaching system and recycles, miemite precipitation is washed
Finished product is obtained after filtering drying.
Comparative example 1 is compared with embodiment 1, the difference is that comparative example 1 is by NH3Gas, which is passed through in water, obtains weak aqua ammonia, then
It will be with obtaining weak aqua ammonia to CO2Gas is absorbed, and is obtained dilute sal volatile and is leached again with calcining mid low grade phosphate rock ammonium salt
Liquid is reacted, rather than by NH3Gas and CO2Gas is passed directly into calcining mid low grade phosphate rock ammonium salt leachate and carries out instead
It answers.
The method pair of miemite is prepared using the calcining mid low grade phosphate rock ammonium salt leachate direct carbonization of embodiment 1-5
100kg low-grade phosphate ore stones are handled, as a result as follows：
Key component content is as follows in mid low grade phosphate rock stone used：
P2O5:25.83%CaO：52.61%CO2：11.86%MgO：5.83% (can be according to CaCO on calculation3=
CaO+CO2、MgCO3=MgO+CO2It calculates)
Embodiment 1-6, comparative example 1 are compared, acquired results are as follows：
| Mid low grade phosphate rock stone amount (kg) | Miemite yield (kg) | |
| Embodiment 1 | 100 | 31.6 |
| Embodiment 2 | 100 | 29.4 |
| Embodiment 3 | 100 | 30.1 |
| Embodiment 4 | 100 | 31.4 |
| Embodiment 5 | 100 | 31.9 |
| Embodiment 6 | 100 | 31.5 |
| Comparative example 1 | 100 | 31.2 |
From the foregoing, it will be observed that the method for the present invention can efficiently use the CO that phosphorus ore is calcined2Gas, phosphorus ore thermal decomposition product
The NH generated in leaching process3Gas is reacted with calcining mid low grade phosphate rock ammonium salt leachate jointly, makes low product in calcining
Position phosphorus ore ammonium salt leachate makes wherein calcium and magnesium form miemite precipitation.
Embodiment 1 and comparative example 1 are compared in terms of technological process：
(1) the water amount of bringing into：Embodiment 1 does not introduce moisture from the external world, and the ammonium nitrate solution finally obtained can be with direct circulation
It uses；Comparative example 1 often handles the mid low grade phosphate rock stone of 100kg, the moisture for more introducing 100-200kg is needed, if do not removed
It goes partial moisture that moisture in the circulatory system can be caused to continue to increase, influences reaction speed, until the liquid beyond reaction environment is held
Carry the limit.
(2) process time：The ammonium nitrate solution that embodiment 1 finally obtains can remove normal reaction with direct reuse
Outside journey, it need not increase time-consuming；Comparative example 1 often handles the mid low grade phosphate rock stone of 100kg, the 100- additionally introduced
200kg moisture needs the moisture that the ammonium nitrate solution that will be finally obtained evaporates same amount to enter back into cycle, could keep cycle
The moisture of system is constant, and the concentration and evaporation water can cause the time of W-response process to increase about 20-50% with energy consumption.
(3) cost：The ammonium nitrate solution that embodiment 1 finally obtains can need not be concentrated with direct reuse, no concentration
Consuming cost；Comparative example 1 heat etc. concentration operation and also needs to additional equipment expenditure and energy expenditure spending, with embodiment
1 compares, and cost increases about 10-30%.
(4) production continuity influences：1 less introducing extra water of embodiment, the ammonium nitrate solution finally obtained can be straight
Connect recycling, W-response process can link up progress, be buried without additional place；Comparative example 1 is needed when carrying out concentration operation
Calculate the Specific amounts of evaporable water, then be evaporated, evaporation process can not link up progress, can only segment processing, largely effect on
The continuity of production, causes the production efficiency to reduce 20-30% than embodiment 1.
The present invention is used only ammonium nitrate or ammonium chloride solution and recycles, and ammonium nitrate or ammonium chloride are lossless, also avoids to following
Loop system introduces extra water；The production capacity of granularity control and raising pressure filtration washing when the present invention synthesizes convenient for miemite；
The NH used in the present invention3Gas source reacts in thermal decomposition product with ammonium nitrate or ammonium chloride solution, CO2It is calcined from phosphorus ore
Thermal decomposition product is obtained, to needing the exhaust gas discharged to be recycled during original production, has not only reduced exhaust gas discharge, but also save
Cost of material.
Finally it is pointed out that above example is only the more representational example of the present invention.Obviously, technology of the invention
Scheme is not limited to above-described embodiment, and acceptable there are many deformation, (as used two sections of leaching calcium, magnesium respectively, then carbonization can respectively
Pure calcium carbonate, magnesium carbonate or magnesium hydroxide is made).Those skilled in the art can directly lead from present disclosure
All deformations for going out or associating, are considered as protection scope of the present invention.
Claims (7)
1. a kind of method that calcining mid low grade phosphate rock ammonium salt leachate direct carbonization prepares miemite, which is characterized in that packet
Include following steps：
(1) mid low grade phosphate rock is calcined to obtain thermal decomposition product and CO2Gas；
(2) thermal decomposition product of acquisition is mixed into leaching with ammonium nitrate solution or ammonium chloride solution, obtains the calcining containing calcium and magnesium salt
Mid low grade phosphate rock ammonium salt leachate and NH3Gas；
(3) CO for obtaining obtained calcining mid low grade phosphate rock ammonium salt leachate with step (1)2What gas and step (2) obtained
NH3Gas is passed through together in calcining mid low grade phosphate rock ammonium salt leachate, and calcining mid low grade phosphate rock ammonium salt leachate is made to be carbonized
Calcium and magnesium is precipitated, miemite is obtained.
2. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 1 prepares the side of miemite
Method, which is characterized in that the step (2), when thermal decomposition product to be mixed to leaching with ammonium nitrate solution or ammonium chloride solution, control
25-95 DEG C of temperature collects the ammonia of generation, and it is 6.5-9.5 to make pH of leaching solution.
3. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 2 prepares the side of miemite
Method, which is characterized in that it is described to collect the ammonia generated, be after mixing thermal decomposition product with ammonium nitrate solution or ammonium chloride solution,
It is placed in the ammonia that cyclic absorption leaching generates in absorption tower.
4. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 1 prepares the side of miemite
Method, which is characterized in that the step (3), at 25-80 DEG C, control of reaction end point pH value is 7.5-9.0 for reaction temperature control.
5. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 1 prepares the side of miemite
Method, which is characterized in that the CO for being calcined mid low grade phosphate rock2Gas is passed through after purification and impurity removal and forges again
It burns in mid low grade phosphate rock ammonium salt leachate.
6. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 1 prepares the side of miemite
Method, which is characterized in that further include step (4), the mixture that step (3) is obtained, after being separated by filtration miemite precipitation, filtrate
For ammonium nitrate solution, filtrate is returned into leaching system and is recycled, miemite obtains finished product after precipitating washed filtering drying.
7. calcining mid low grade phosphate rock ammonium salt leachate direct carbonization according to claim 6 prepares the side of miemite
Method, which is characterized in that it is described to be separated by filtration miemite, it is to detach miemite using plate and frame filter press.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872105A (en) * | 2018-08-31 | 2020-03-10 | 贵州芭田生态工程有限公司 | Method for efficiently leaching calcium and magnesium ions in phosphorite |
| CN111498887A (en) * | 2020-04-22 | 2020-08-07 | 深圳市芭田生态工程股份有限公司 | System and method for producing solid carbonate and solid carbonate |
| CN112723396A (en) * | 2021-01-04 | 2021-04-30 | 贵州芭田生态工程有限公司 | Method for preparing magnesium oxide and calcium ammonium nitrate from chemical beneficiation by-product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100187B (en) * | 1985-04-01 | 1985-09-10 | 陕西省化学肥料工业公司 | Process for chemcial separation of phosphate ore |
| CN104925772A (en) * | 2015-05-06 | 2015-09-23 | 贵州省化工研究院 | Process for preparing phosphate concentrate and byproduct magnesium-containing calcium carbonate from medium-low-grade phosphorite |
-
2018
- 2018-04-19 CN CN201810356190.9A patent/CN108358230A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100187B (en) * | 1985-04-01 | 1985-09-10 | 陕西省化学肥料工业公司 | Process for chemcial separation of phosphate ore |
| CN104925772A (en) * | 2015-05-06 | 2015-09-23 | 贵州省化工研究院 | Process for preparing phosphate concentrate and byproduct magnesium-containing calcium carbonate from medium-low-grade phosphorite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872105A (en) * | 2018-08-31 | 2020-03-10 | 贵州芭田生态工程有限公司 | Method for efficiently leaching calcium and magnesium ions in phosphorite |
| CN111498887A (en) * | 2020-04-22 | 2020-08-07 | 深圳市芭田生态工程股份有限公司 | System and method for producing solid carbonate and solid carbonate |
| CN112723396A (en) * | 2021-01-04 | 2021-04-30 | 贵州芭田生态工程有限公司 | Method for preparing magnesium oxide and calcium ammonium nitrate from chemical beneficiation by-product |
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