CN102115819A - Method for recycling magnesium from middle-low grade high-magnesium phosphate rock - Google Patents

Method for recycling magnesium from middle-low grade high-magnesium phosphate rock Download PDF

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CN102115819A
CN102115819A CN2011100287366A CN201110028736A CN102115819A CN 102115819 A CN102115819 A CN 102115819A CN 2011100287366 A CN2011100287366 A CN 2011100287366A CN 201110028736 A CN201110028736 A CN 201110028736A CN 102115819 A CN102115819 A CN 102115819A
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China
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magnesium
phosphorus ore
grade high
phosphate
reaction
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盛勇
刘小春
胡曼川
谭伟
方定伟
黄磊
陈明凤
周佩
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Sinochem Fuling Chongqing Chemical Industry Co Ltd
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Sinochem Fuling Chongqing Chemical Industry Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a method for recycling magnesium from middle-low grade high-magnesium phosphate rock, which is used for pretreating phosphate rock serving as a raw material and recycling magnesium during wet phosphoric acid production. The method comprises the following steps of: removing magnesium from the middle-low grade high-magnesium phosphate rock with a magnesium removing agent by using a chemical method and dissolving most magnesium in the phosphate rock out of phosphate rock pulp; after a magnesium removing reaction is finished, performing solid-liquid separation on the formed pulp, wherein an obtained solid filter cake is magnesium-removed phosphate concentrate which can be put into the wet production of phosphoric acid; putting filtrate serving as magnesium-removed pulp into a next precipitation reaction procedure, adding an appropriate amount of neutralizing precipitant to adjust the pH value to 7.5-9.0 and undergoing a precipitation reaction; and performing solid-liquid separation after the reaction, and drying the solid precipitate which is ammonium magnesium phosphate with air stream to obtain a finished ammonium magnesium phosphate slow-release fertilizer. The obtained filtrate (containing ammonium sulfate) can be returned to wet phosphoric acid production.

Description

Reclaim the method for magnesium in the therefrom low-grade high-magnesium-phosphorus ore
Technical field
The present invention relates to reclaim in a kind of therefrom low-grade high-magnesium-phosphorus ore the method for magnesium, relate to adopt in the preprocessing process of low-grade high-magnesium-phosphorus ore in a kind of raw material of Wet-process Phosphoric Acid Production chemical process to deviate from concretely and reclaims magnesium in the phosphorus ore, the method for Mg content in reduction phosphoric acid by wet process and the derived product thereof.
Background technology
The existence of magnesium to the processing of phosphorus ore particularly wet processes can bring a series of totally unfavorable influences.Because the magnesium salts in the phosphorus ore will all be dissolved in the phosphoric acid solution in Wet-process Phosphoric Acid Production, in Wet-process Phosphoric Acid Production, because magnesium all enters liquid phase and makes H in the phosphoric acid +Concentration reduces greatly, has influenced the reaction of phosphorus ore, in order to keep certain H +Concentration, the just necessary sulfate ion concentration that improves liquid phase so just causes crystal of calcium sulfate tiny.Simultaneously, because Mg 2+Existence, crystal of calcium sulfate is grown into elongated needle crystal, when this just makes phosphogypsum separate not only intensity filter descend, detersive efficiency also decreases, the phosphorus yield also just reduces.For the production equipment of identical scale, its actual capacity descends along with the increase of phosphorus ore magnesium content.Moreover, because a large amount of magnesium enters liquid phase, the phosphoric acid magnesium content height of producing, this brings disadvantageous effect also for the following process of phosphoric acid.Such as, produce coarse whiting and can cause that the secondary phosphorus ore resolution ratio reduces; Produce then block system very easily when Phosphoric Acid Concentration of phosphorus ammonium, strengthened system's cleaning frequency, and the water-soluble phosphorus of fertilizer and available phosphorus are descended; Produce phosphoric acid salt then because the existence of magnesium can reduce its product purity, or the load of phosphoric acid purification system is increased greatly.
For deviating from the impurity that comprises magnesium in the phosphorus ore, the popular beneficiation method is physical concentration both at home and abroad at present.So-called physical concentration mainly is to utilize the difference of different substances on physicals and proportion, adopt clean, dense medium is chosen with physical method such as positive reverse flotation phosphorus ore is separated with impurity, reaches the method for enrichment phosphorus ore.But because China contains " collophanite " that the magnesium phosphorus ore belongs to difficult choosing, carbonate content height, gangue mineral often are distributed in wherein with trickle oolith shape particles dispersed embedding, and cost is higher, and initial cost is bigger, and productive expense is also higher, and waste water is difficult to handle.Therefore, only adopt the method ore dressing of physical concentration, its result is also unsatisfactory.
A kind of method of chemical de-magging is disclosed among the Chinese patent CN1924046A, it adopts compound de-magging agent that magnesium is spun off from phosphorus ore, compound de-magging agent is the mixture of the vitriol oil or the vitriol oil and sodium ethylene diamine tetracetate or silicofluoric acid or nitric acid, though compound de-magging agent like this can spin off the magnesium in the phosphorus ore, but because compound de-magging agent is acid strong, cause easily generating phosphoric acid behind the phosphorus reaction in the phosphorus ore and cause the phosphorus loss, reaction mechanism is as follows
Ca 10F 2(PO 4) 6+H 2SO 4+?H 2O→H 3PO 4+?CaSO 4.2H 2O?+HF。
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of both can slough in most of magnesium in the low-grade high-magnesium-phosphorus ore, can also reduce to reclaim in the therefrom low-grade high-magnesium-phosphorus ore of loss of phosphorus in the phosphorus ore method of magnesium.
The object of the present invention is achieved like this, reclaims the method for magnesium in a kind of therefrom low-grade high-magnesium-phosphorus ore, comprises following processing step:
(1) in magniferous ground phosphate rock or phosphorus ore slurry, adds water and be made into the slurries that mass concentration is 25-35%, be warming up to 50 ~ 60 ℃, stir adding de-magging agent in above-mentioned slurries down, and the maintenance pH value be 50 ~ 60 ℃ of 2.0-4.0, temperature, stirring reaction 2-3 hour, deviate from the magnesium in the phosphorus ore; Described de-magging agent is the mixture of magnesium hydrogen sulfate or the vitriol oil and sal epsom;
(2) stop to stir, above-mentioned reaction solution is carried out solid-liquid separation, solid phase is the phosphorus concentrate behind the de-magging, and liquid phase is for containing the magnesium slip;
(3) the magnesium slip that contains that step (2) obtains enters in the neutralization precipitation groove, adds neutralization precipitation agent adjustment pH value to 7.5 ~ 9.0 under stirring and carries out neutralization-precipitation reaction, reacts 20 ~ 60min under 50 ~ 60 ℃ condition, and precipitation is separated out magnesium ammonium phosphate; Described neutralization precipitation agent be monoammonium phosphate or monoammonium phosphate and bicarbonate of ammonia or with ammoniacal liquor or with liquefied ammonia in any mixture.
(4) after precipitin reaction is finished, the precipitation slip is carried out solid-liquid separation obtain solid phosphoric acid ammonium magnesium.
Adopt technique scheme, as the de-magging agent, the reaction product of sulfuric acid and sal epsom also is magnesium hydrogen sulfate Mg (HSO with the mixture of magnesium hydrogen sulfate or the vitriol oil and sal epsom 4) 2), the mechanism of its de-magging is as follows:
CaCO 3+Mg(HSO 4) 2+H 2O→CaSO 4 .2H 2O↓+?CO 2↑+?MgSO 4
MgCO 3+Mg(HSO 4) 2→MgSO 4+H 2O+CO 2
CaSiO 3+Mg(HSO 4) 2+H 2O→CaSO 4 .2H 2O↓+SiO 2↓+?MgSO 4
MgSiO 3+Mg(HSO 4) 2→MgSO 4+SiO 2↓+H 2O
At first magnesium is with MgSO 4Form stay in the liquid phase simultaneously lime carbonate and sulfuric acid reaction generation CaSO 4.2H 2O is precipitated out as precipitation, and it is separated with magnesium.Because a little less than the acidity of acidity than the mixture of the vitriol oil or the vitriol oil and sodium ethylene diamine tetracetate or silicofluoric acid or nitric acid of magnesium hydrogen sulfate, according to strong acid system faintly acid principle, magnesium hydrogen sulfate is difficult to Ca 10F 2(PO 4) 6Be reacted into phosphoric acid and cause the phosphorus loss.Magnesium hydrogen sulfate dissolves in slip as salt on the other hand, helps CaSO 4 .2H 2O and Ca 10F 2(PO 4) 6Precipitation, and improved the quality of magnesium ammonium phosphate.Demagnesium rate of the present invention can reach 70%~85%, and the phosphorus loss is less than 3%.
The mechanism that the present invention reclaims magnesium is:
PO 4 3-?+?6H 2O+Mg 2++NH 4 +→MgNH 4PO 4·6H 2O↓
Gained filtrate (sulfur acid ammonium) can be returned the Wet-process Phosphoric Acid Production use in the step 4 in addition.This both can make water resources obtain recycle, can avoid again separation and washings discharging are polluted environment.
In order to make reaction more abundant, the fineness of described magniferous ground phosphate rock or phosphorus ore slurry reach 85% contain magnesium ground phosphate rock or phosphorus ore was starched 100 mesh sieve.
In order to reduce the magnesium loss, reduce the Mg content in the phosphorus concentrate: the solid phase after separating in the step (2) washes with water, and the liquid after the washing is incorporated into and contained in the magnesium slip.
In technique scheme: described de-magging agent is a magnesium hydrogen sulfate.
In technique scheme: described de-magging agent is obtained after sal epsom 40-60 part mixes by vitriol oil 40-60 part of 98%.
In technique scheme: after precipitin reaction is finished, the precipitation slip is forced vacuum filtration, filter cake water or phosphorus-containing wastewater washing obtain solid phosphoric acid ammonium magnesium.
In technique scheme: the magnesium ammonium phosphate that obtains in the step (4) directly is used as slow-release fertilizer or does the slow fertile coating agent of controlling/release after adopting air stream drying under the 80-100 ℃ of condition.
In technique scheme, described neutralization precipitation agent is a monoammonium phosphate.Make magnesium be precipitated out with the form of magnesium ammonium phosphate at last, the magnesium ammonium phosphate of generation can be used to produce the magnesium ammonium phosphate slow-release fertilizer.
In technique scheme, described neutralization precipitation agent is any mixture in monoammonium phosphate and bicarbonate of ammonia or ammoniacal liquor or the liquefied ammonia.Stripping quantity (can be drawn by the amount of adding the de-magging agent) according to magnesium in the process of reaction adds monoammonium phosphate, and the interpolation of bicarbonate of ammonia or ammoniacal liquor or liquefied ammonia makes also has enough NH in the reaction solution 4 +, help the formation and the precipitation of magnesium ammonium phosphate.
Beneficial effect: the present invention reclaims the efficient height of magnesium, and the phosphorus loss is little, and simple and reliable process is fit to suitability for industrialized production.
Specific embodiments
The present invention is further illustrated below in conjunction with embodiment
Embodiment 1
(1) get in low-grade high-magnesium-phosphorus ore (P 2O 5Content is 25.2%, and MgO content is 3.14%, MgO/ P 2O 5Be 12.46%) grind to form ground phosphate rock, the ground phosphate rock fineness is 80% mistake, 100 mesh sieve.Get 650 gram breezes in reactive tank, add water 1625g and stir.Warming-in-water to 60 ℃, adding de-magging agent (by obtaining after 50 parts of 98% vitriol oils and 50 parts of mixing of sal epsom) regulates pH value and equals to stop to add the de-magging agent at 3.5 o'clock, add de-magging agent 235.7g altogether, bath temperature constant temperature to 60 ℃, stirring reaction 2h is dissolved the magnesium in the phosphorus ore under the effect of acid.
(2) the de-magnesium reaction slip carries out solid-liquid separation in the mode (can adopt centrifugal treating when equivalent is big) of forcing vacuum filtration, and uses the proper amount of clear water washing leaching cake.Filter cake is a de-magging phosphorus concentrate, the production that can enter phosphoric acid by wet process, and it is composed as follows:
P 2O 5(%) MgO(%) MgO/P 2O 5(%)
25.0 0.71 2.84
(3) filtrate after vacuum filtration enters the neutralization-precipitation reaction groove, adds the pH value to 7.5 that monoammonium phosphate is regulated slip under 55 ℃ of conditions, adds monoammonium phosphate 23g altogether, stirring reaction 60min, and the magnesium ammonium phosphate that reaction is generated is fully separated out.
(4) the precipitation slip after precipitin reaction finishes carries out solid-liquid separation (can adopt centrifugal treating when equivalent is big) with vacuum filtration, and washes with water, and filtrate is returned phosphoric acid by wet process and used.
(5) filter cake behind the filtration washing promptly obtains the magnesium ammonium phosphate product carrying out air stream drying under 90 ℃ about two hours, and it is composed as follows:
P 2O 5(%) MgO(%) N(%)
36.82 19.12 5.09
Embodiment 2
(1) get in low-grade high-magnesium-phosphorus ore (P 2O 5Content is 25.2%, and MgO content is 3.14%, MgO/ P 2O 5Be 12.46%) grind to form ground phosphate rock, the ground phosphate rock fineness is 80% mistake, 100 mesh sieve.Get 600 gram breezes in reactive tank, adding water 1800g stirs, water-bath to 60 ℃, adding de-magging agent magnesium hydrogen sulfate regulates pH value and equals to stop to add the de-magging agent at 4.0 o'clock, add magnesium hydrogen sulfate 220.6g altogether, bath temperature constant temperature to 60 ℃, stirring reaction 120min is dissolved the magnesium in the phosphorus ore under the effect of acid.
(2) the de-magnesium reaction slip carries out solid-liquid separation in the mode of forcing vacuum filtration, and uses the proper amount of clear water washing leaching cake.Filter cake is a de-magging phosphorus concentrate, the production that can enter phosphoric acid by wet process, and it is composed as follows:
P 2O 5(%) MgO(%) MgO/P 2O 5(%)
25.1 0.79 3.15
(3) filtrate after vacuum filtration enters the neutralization-precipitation reaction groove, under 60 ℃ of conditions, add concentration and be the pH value to 8 that 26.5% ammoniacal liquor and monoammonium phosphate are regulated slip, add concentration altogether and be 26.5% ammoniacal liquor 7.2g, monoammonium phosphate 17g, stirring reaction 45min, the magnesium ammonium phosphate that reaction is generated is fully separated out.
(4) the precipitation slip after precipitin reaction finishes carries out solid-liquid separation with vacuum filtration and washes with water, and filtrate is returned phosphoric acid by wet process and used.
(5) filter cake behind the filtration washing promptly obtains the magnesium ammonium phosphate product carrying out air stream drying under 90 ℃ about two hours, and it is composed as follows:
P 2O 5(%) MgO(%) N(%)
35.90 20.32 5.28
Embodiment 3
(1) get in low-grade high-magnesium-phosphorus ore (P 2O 5Content is 25.2%, and MgO content is 3.14%, MgO/ P 2O 5Be 12.46%) grind to form ground phosphate rock, the ground phosphate rock fineness is 80% mistake, 100 mesh sieve.. get 650 gram breezes in reactive tank, add water 1300g and stir water-bath to 60 ℃, adding de-magging agent (by obtaining after 55 parts of 98% vitriol oils and 45 parts of mixing of sal epsom) regulates pH value and equals to stop to add the de-magging agent at 3.0 o'clock, add de-magging agent 212.4g altogether, bath temperature constant temperature to 50 ℃, stirring reaction 120min is dissolved the magnesium in the phosphorus ore under the effect of acid.
(2) the de-magnesium reaction slip carries out solid-liquid separation in the mode of forcing vacuum filtration, and uses the proper amount of clear water washing leaching cake.Filter cake is a de-magging phosphorus concentrate, the production that can enter phosphoric acid by wet process, and it is composed as follows:
P 2O 5(%) MgO(%) MgO/P 2O 5(%)
24.9 0.67 2.69
(3) filtrate after vacuum filtration enters the neutralization-precipitation reaction groove, under 50 ℃ of conditions, add in liquefied ammonia and the monoammonium phosphate and the pH value to 9.0 of adjusting slip, add liquefied ammonia 11.7g altogether, monoammonium phosphate 14.6g, stirring reaction 60min, the magnesium ammonium phosphate that reaction is generated is fully separated out.
(4) the precipitation slip after precipitin reaction finishes carries out solid-liquid separation with vacuum filtration and washes with water, and filtrate is returned phosphoric acid by wet process and used.
(5) filter cake behind the filtration washing promptly obtains the magnesium ammonium phosphate product carrying out air stream drying under 90 ℃ about two hours, and it is composed as follows:
P 2O 5(%) MgO(%) N(%)
37.74 20.43 5.30
Embodiment 4
(1) get in low-grade high-magnesium-phosphorus ore (P 2O 5Content is 25.2%, and MgO content is 3.14%, MgO/ P 2O 5Be 12.46%) grind to form ground phosphate rock, the ground phosphate rock fineness is 80% mistake, 100 mesh sieve.. get 650 gram breezes in reactive tank, add water 1300g and stir water-bath to 50 ℃, adding de-magging agent (by obtaining after 55 parts of 98% vitriol oils and 45 parts of mixing of sal epsom) regulates pH value and equals to stop to add the de-magging agent at 3.0 o'clock, add de-magging agent 212.4g altogether, bath temperature constant temperature to 55 ℃, stirring reaction 120min is dissolved the magnesium in the phosphorus ore under the effect of acid.
(2) the de-magnesium reaction slip carries out solid-liquid separation in the mode of forcing vacuum filtration, and uses the proper amount of clear water washing leaching cake.Filter cake is a de-magging phosphorus concentrate, the production that can enter phosphoric acid by wet process, and it is composed as follows:
P 2O 5(%) MgO(%) MgO/P 2O 5(%)
24.8 0.68 2.74
(3) filtrate after vacuum filtration enters the neutralization-precipitation reaction groove, under 55 ℃ of conditions, add in bicarbonate of ammonia and the monoammonium phosphate and the pH value to 9.0 of adjusting slip, add bicarbonate of ammonia 49g altogether, monoammonium phosphate 14.6g, stirring reaction 60min, the magnesium ammonium phosphate that reaction is generated is fully separated out.
(4) the precipitation slip after precipitin reaction finishes carries out solid-liquid separation with vacuum filtration and washes with water, and filtrate is returned phosphoric acid by wet process and used.
(5) filter cake behind the filtration washing promptly obtains the magnesium ammonium phosphate product carrying out air stream drying under 90 ℃ about two hours, and it is composed as follows:
P 2O 5(%) MgO(%) N(%)
37.63 20.34 5.28

Claims (9)

1. reclaim the method for magnesium in the therefrom low-grade high-magnesium-phosphorus ore, comprise following processing step:
(1) in magniferous ground phosphate rock or phosphorus ore slurry, adds water and be made into the slurries that mass concentration is 25-35%, be warming up to 50 ~ 60 ℃, stir adding de-magging agent in above-mentioned slurries down, and the maintenance pH value be 50 ~ 60 ℃ of 2.0-4.0, temperature, stirring reaction 2-3 hour, deviate from the magnesium in the phosphorus ore; Described de-magging agent is the mixture of magnesium hydrogen sulfate or the vitriol oil and sal epsom;
(2) stop to stir, above-mentioned reaction solution is carried out solid-liquid separation, solid phase is the phosphorus concentrate behind the de-magging, and liquid phase is for containing the magnesium slip;
(3) the magnesium slip that contains that step (2) obtains enters in the neutralization precipitation groove, adds neutralization precipitation agent adjustment pH value to 7.5 ~ 9.0 under stirring and carries out neutralization-precipitation reaction, reacts 20 ~ 60min under 50 ~ 60 ℃ condition,
Separate out magnesium ammonium phosphate; Described neutralization precipitation agent be monoammonium phosphate or monoammonium phosphate and bicarbonate of ammonia or with ammoniacal liquor or with liquefied ammonia in any mixture;
(4) after precipitin reaction is finished, the precipitation slip is carried out solid-liquid separation obtain solid phosphoric acid ammonium magnesium.
2. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: the fineness of described magniferous ground phosphate rock or phosphorus ore slurry reaches 85% magniferous ground phosphate rock or phosphorus ore and starched 100 mesh sieves.
3. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: the solid phase after separating in the step (2) washes with water, and the liquid after the washing is incorporated into and contained in the magnesium slip.
4. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: described de-magging agent is a magnesium hydrogen sulfate.
5. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: described de-magging agent is obtained after sal epsom 40-60 part mixes by vitriol oil 40-60 part of 98%.
6. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: after precipitin reaction is finished in the step (4), the precipitation slip is forced vacuum filtration, filter cake water or phosphorus-containing wastewater washing obtain solid phosphoric acid ammonium magnesium.
7. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: the magnesium ammonium phosphate that obtains in the step (4) directly is used as slow-release fertilizer or does the slow fertile coating agent of controlling/release after adopting air stream drying under the 80-100 ℃ of condition.
8. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: described neutralization precipitation agent is a monoammonium phosphate.
9. according to the method that reclaims magnesium in the described therefrom low-grade high-magnesium-phosphorus ore of claim 1, it is characterized in that: described neutralization precipitation agent be monoammonium phosphate and bicarbonate of ammonia or with ammoniacal liquor or with liquefied ammonia in any mixture.
CN2011100287366A 2011-01-27 2011-01-27 Method for recycling magnesium from middle-low grade high-magnesium phosphate rock Pending CN102115819A (en)

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Cited By (13)

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CN102776367A (en) * 2012-08-14 2012-11-14 安徽六国化工股份有限公司 Method for demagging ground phosphorite and preparing MgHPO4.3H2O
CN102923684A (en) * 2012-11-09 2013-02-13 瓮福(集团)有限责任公司 Method for utilizing magnesium bicarbonate aqueous solution to produce magnesium ammonium phosphate compound fertilizer
CN102992284A (en) * 2012-12-12 2013-03-27 贵州开磷(集团)有限责任公司 High-magnesium phosphorite de-magging method with by-product magnesium ammonium phosphate
CN103318867A (en) * 2013-06-13 2013-09-25 江苏远东环保工程有限公司 Method for recovering magnesium ammonium phosphate from magnesia process desulfurization waste liquid and equipment system of method
CN103864037A (en) * 2014-03-21 2014-06-18 昆明理工大学 Method for removing magnesium from phosphorite and recycling rare earth element in phosphorite through industrial smoke
CN104445120A (en) * 2014-11-04 2015-03-25 湖北祥云(集团)化工股份有限公司 Co-production method and system of ammonium phosphate and magnesium hydrate
CN106745105A (en) * 2016-12-29 2017-05-31 云南磷化集团有限公司 A kind of gypsum stack backwater is used for the method that high-magnesium-phosphorus ore drop magnesium carries phosphorus
CN107128890A (en) * 2017-06-20 2017-09-05 四川龙蟒磷化工有限公司 Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging
CN109437982A (en) * 2018-11-12 2019-03-08 贵州开磷氟硅化工有限责任公司 A kind of method that phosphorus ore de-magging waste liquid prepares water-soluble ammonium sulphate phosphate fertiliser containing magnesium feed additives
CN110697674A (en) * 2019-12-03 2020-01-17 中化重庆涪陵化工有限公司 Method for producing magnesium ammonium phosphate by using high-magnesium phosphate tailings
CN111438002A (en) * 2020-04-20 2020-07-24 武汉工程大学 Method for treating silicon-calcium collophanite by 'floating-chemical' coupling
CN112758971A (en) * 2021-01-04 2021-05-07 贵州芭田生态工程有限公司 Method for recycling calcium-magnesium-containing leaching solution
CN112794346A (en) * 2021-01-04 2021-05-14 贵州芭田生态工程有限公司 Method for simultaneously preparing calcium sulfate, potassium nitrate, potassium magnesium nitrate and magnesium carbonate from calcium magnesium ammonium nitrate liquid

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
CN102776367A (en) * 2012-08-14 2012-11-14 安徽六国化工股份有限公司 Method for demagging ground phosphorite and preparing MgHPO4.3H2O
CN102776367B (en) * 2012-08-14 2013-10-23 安徽六国化工股份有限公司 Method for demagging ground phosphorite and preparing MgHPO4.3H2O
CN102923684A (en) * 2012-11-09 2013-02-13 瓮福(集团)有限责任公司 Method for utilizing magnesium bicarbonate aqueous solution to produce magnesium ammonium phosphate compound fertilizer
CN102992284A (en) * 2012-12-12 2013-03-27 贵州开磷(集团)有限责任公司 High-magnesium phosphorite de-magging method with by-product magnesium ammonium phosphate
CN102992284B (en) * 2012-12-12 2014-10-29 贵州开磷(集团)有限责任公司 High-magnesium phosphorite de-magging method with by-product magnesium ammonium phosphate
CN103318867A (en) * 2013-06-13 2013-09-25 江苏远东环保工程有限公司 Method for recovering magnesium ammonium phosphate from magnesia process desulfurization waste liquid and equipment system of method
CN103864037A (en) * 2014-03-21 2014-06-18 昆明理工大学 Method for removing magnesium from phosphorite and recycling rare earth element in phosphorite through industrial smoke
CN103864037B (en) * 2014-03-21 2016-08-17 昆明理工大学 Industrial smoke is utilized to carry out phosphorus ore de-magging and the method reclaiming phosphorus ore rare earth elements
CN104445120B (en) * 2014-11-04 2016-06-15 湖北祥云(集团)化工股份有限公司 A kind of phosphorus ammonium and magnesium hydroxide with coproduction method and system
CN104445120A (en) * 2014-11-04 2015-03-25 湖北祥云(集团)化工股份有限公司 Co-production method and system of ammonium phosphate and magnesium hydrate
CN106745105A (en) * 2016-12-29 2017-05-31 云南磷化集团有限公司 A kind of gypsum stack backwater is used for the method that high-magnesium-phosphorus ore drop magnesium carries phosphorus
CN107128890A (en) * 2017-06-20 2017-09-05 四川龙蟒磷化工有限公司 Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging
CN107128890B (en) * 2017-06-20 2019-08-27 四川龙蟒磷化工有限公司 Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging
CN109437982A (en) * 2018-11-12 2019-03-08 贵州开磷氟硅化工有限责任公司 A kind of method that phosphorus ore de-magging waste liquid prepares water-soluble ammonium sulphate phosphate fertiliser containing magnesium feed additives
CN110697674A (en) * 2019-12-03 2020-01-17 中化重庆涪陵化工有限公司 Method for producing magnesium ammonium phosphate by using high-magnesium phosphate tailings
CN110697674B (en) * 2019-12-03 2021-03-30 中化重庆涪陵化工有限公司 Method for producing magnesium ammonium phosphate by using high-magnesium phosphate tailings
CN111438002A (en) * 2020-04-20 2020-07-24 武汉工程大学 Method for treating silicon-calcium collophanite by 'floating-chemical' coupling
CN112758971A (en) * 2021-01-04 2021-05-07 贵州芭田生态工程有限公司 Method for recycling calcium-magnesium-containing leaching solution
CN112794346A (en) * 2021-01-04 2021-05-14 贵州芭田生态工程有限公司 Method for simultaneously preparing calcium sulfate, potassium nitrate, potassium magnesium nitrate and magnesium carbonate from calcium magnesium ammonium nitrate liquid

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Application publication date: 20110706