CN104724686B - A kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate - Google Patents
A kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate Download PDFInfo
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- CN104724686B CN104724686B CN201510110144.7A CN201510110144A CN104724686B CN 104724686 B CN104724686 B CN 104724686B CN 201510110144 A CN201510110144 A CN 201510110144A CN 104724686 B CN104724686 B CN 104724686B
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Abstract
The invention discloses a kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate, the method is phosphorus ore containing potassium to be put in the electric furnace of production yellow phosphorus, the K in phosphorus ore containing potassium2Escape Jing circulated sprinkling system with furnace gas after O distillations and cool, after the operation such as spray-absorption processes, finally give yellow phosphorus and phosphoric acid potassium salt product.The present invention solves the deficiency that the rich ore of current industrial production yellow phosphorus lacks, and while a variety of potassium phosphates can also be obtained by arranging certain technological parameter during production yellow phosphorus, solve the problems, such as that the sylvite condition of production is bad, so that the yellow phosphorus of high-quality and the potassium phosphate of high added value can be obtained in production simultaneously, realize the comprehensive utilization containing potassium phosphate rock resource, production cost is reduced, huge economic benefit is obtained in that.
Description
Technical field
The present invention relates to chemical production field, in particular it relates to a kind of phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate
Method.
Background technology
1st, the disappearance of rich phosphorus ore
Than relatively low, more than 90% belongs to middle-low grade, average grade only 16.85% to China's rock phosphate in powder average grade.Wherein contain
Potassium phosphorus ore P2O5Content is low, complicated components, big using difficulty.By taking Hanyuan County, sichuan Province phosphorus ore as an example, with gravel structure and bioclast
Based on structure, its chemical constituent see the table below：
For many years for saving energy consumption, reduction production cost, phosphorus ore raw material used is with rich ore for Chinese yellow phosphorus manufacturing enterprise
Based on（P2O5Mass fraction >=28%）.Many years exhaustive exploitations of Jing, there is not much left for rich ore, it is difficult to ensure that phosphorus production needs.With
Low-grade phosphate ore certainly will cause high energy consumption, material consumption high.
2nd, the present situation of potassium deficiency
Potash Resources in China is poor, and the sylvite place of production is predominantly located at the Northwest, the place of production is remote, have inconvenient traffic, energy shortage,
Grade is again low, constrains the raising of China's sylvite yield.For the production of sylvite, the shared ratio of China's sylvite production is very
It is little, the 0.3%-0.6% of Gross World Product is only accounted for, mainly resource shortage, the condition of utilization of tracing it to its cause is poor.
3rd, the method for also not producing sylvite and yellow phosphorus using low grade potassium-containing rock phosphate in powder simultaneously.
In view of both the above present situation, in order to the rock phosphate in powder grade for solving existing phosphorus production mostly is middle and low grade bauxite, rich ore
The not enough problem of content and the current sylvite condition of production allow of no optimist, it is impossible to present situation of the effectively utilizes containing potassium phosphate rock resource, carry
The present invention is gone out to realize using low grade potassium-containing phosphorus ore while producing the purpose of yellow phosphorus and potassium phosphate, to be killed two birds with one stone
Invention.
The content of the invention
The technical problem to be solved is to provide a kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate,
The method prepares yellow phosphorus using low grade potassium-containing phosphorus ore, solves the deficiency that the rich ore of current industrial production yellow phosphorus lacks, and together
When can also pass through the certain technological parameter of setting during production yellow phosphorus and obtain a variety of potassium phosphates, solve
The bad problem of the sylvite condition of production so that the yellow phosphorus of high-quality and the potassium phosphate of high added value can be obtained in production simultaneously
Salt, improves comprehensive resource utilization rate, reduces production cost, is obtained in that huge economic benefit.
The present invention the adopted technical scheme that solves the above problems is：
Phosphorus ore containing potassium is put into the electric furnace of production yellow phosphorus by a kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate
In, the K in phosphorus ore containing potassium2Escape with furnace gas after O distillations, will be with K2The furnace gas of O is passed through circulated sprinkling system, the phosphorus in furnace gas
Liquid phosphor is condensed in circulated sprinkling system and obtains yellow phosphorus product into refinement, and K2O then with circulated sprinkling system
Become K after phosphatase reaction in system+Enter in circulated sprinkling system, in monitoring circulated sprinkling system, pH value can generate need
During the potassium phosphate wanted, K will be contained+Liquid Jing removal of impurities, evaporation, cooling, crystallization, dry phosphoric acid potassium salt product, wherein circulating
The temperature controlling range of spray system is 50～90 DEG C.
Circulated sprinkling system washs the K in furnace gas using phosphoric acid circulation2O compositions, make K2O is under certain pH value and phosphoric acid
Fully react.Circulated sprinkling system main purpose is realized by spraying the phosphoric acid of lower temperature to cool and absorbing reaction
Cooling furnace gas and absorption K2The effect of O, and adopt pressure indirect heat exchange to reduce the phosphoric acid Temperature in circulated sprinkling system.And follow
The process of ring spray system is actually：Phosphoric acid absorbs K by circulated sprinkling2O, reaches certain ph and prepares corresponding potassium phosphate
Removal system during salt system, Jing removal of impurities, evaporation, cooling, crystallization, dry prepared phosphoric acid potassium salt product；During circulated sprinkling,
Proper amount of fresh phosphoric acid is continuously replenished as needed.
The mass concentration of the phosphoric acid is 25-45%.
Before crystallization, the liquid containing K+ is miscellaneous through filtering.
The dedoping step selects plate and frame filter press, millipore filter to carry out.
Temperature control in circulated sprinkling system cools down realization indirectly by heat exchanger.
When the pH value is controlled to 4.4-4.6, potassium phosphate is dipotassium hydrogen phosphate；When pH value is controlled to 8.5-9.0, phosphoric acid
Sylvite is potassium hydrogen phosphate；When pH value is controlled to 11.5-12.5, potassium phosphate is potassium phosphate.
The present invention design concept be：
1st, the present invention is according to K in phosphorus ore containing potassium2O under the auxiliary of auxiliary agent, take out of with high-temperature furnace gas by pyrolytic, distillation
Electric furnace, does not affect electric furnace normal reaction.
2nd, the K of distillation effusion2O gases pass through with furnace gas Jing phosphoric acid spray-absorptions, removal of impurities, evaporation, cooling, crystallization, drying
Constantly the pH value of monitoring circulated sprinkling system is obtained different potassium phosphates.
3rd, the P in furnace gas4Jing after phosphoric acid spray, be seldom partly mixed in phosphoric acid,diluted liquid, due to yellow phosphorus proportion it is larger and difficult
Phosphoric acid is dissolved in, and precipitates the yellow phosphorus prepared into yellow phosphorus-refined technique that flocks together.
4th, circulated sprinkling system can accurately obtain the phosphoric acid for needing by monitoring the change of pH value in cyclic process
Sylvite.
To sum up, the invention has the beneficial effects as follows：
1st, it is of the invention by the K in phosphorus ore containing potassium2O reacts sensible heat using electrothermal furnace, and distillation effusion only increases phosphoric acid spray and inhales
The operations such as receipts, removal of impurities, evaporation, cooling, crystallization, drying are recyclable potassium phosphate, do not affect the normal production of yellow phosphorus, expense ratio
It is minimum.Compare traditional " pyrogenic process " and extract K2O, is almost not required to energy consumption, and production cost is extremely low.
2nd, as gaseous mixture is in advance through phosphoric acid washing, yellow phosphorus quality is more preferable.
3rd, phosphate rock resource containing potassium is made full use of, by the K being wherein difficult by2O compositions are sufficiently recycled, not only
The economic benefit of phosphorus production is doubled and redoubled, moreover it is possible to obtains the sylvite product of scarcity of resources, is obtained in that huge economic worth.
Specific embodiment
With reference to embodiment, make detailed description further to the present invention, but embodiments of the present invention are not limited to
This.
Embodiment 1：
Phosphorus ore containing potassium is put into the electric furnace of production yellow phosphorus by a kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate
In, the K in phosphorus ore containing potassium2Escape with furnace gas after O distillations, will be with K2The furnace gas of O is passed through circulated sprinkling system, the phosphorus in furnace gas
Liquid phosphor is condensed in circulated sprinkling system and obtains yellow phosphorus product into refinement, and K2O then with circulated sprinkling system
Become K after phosphatase reaction in system+Enter in circulated sprinkling system, in monitoring circulated sprinkling system, pH value can generate need
During the potassium phosphate wanted, K will be contained+Liquid Jing removal of impurities, evaporation, cooling, crystallization, dry phosphoric acid potassium salt product, wherein circulating
The temperature controlling range of spray system is 50～90 DEG C.
The mass concentration of the phosphoric acid is 25-45%.
Contain K before crystallization+Liquid through filtering it is miscellaneous.
The dedoping step selects plate and frame filter press, millipore filter to carry out.
Temperature control in circulated sprinkling system cools down realization indirectly by heat exchanger.
Embodiment 2（Phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium dihydrogen phosphate）：
Phosphorus ore containing potassium is put in the electric furnace of production yellow phosphorus, the K in phosphorus ore containing potassium2Escape with furnace gas after O distillations, by band
There is K2The furnace gas of O is passed through circulated sprinkling system, and the phosphorus in furnace gas is condensed into liquid phosphor in circulated sprinkling system and enters refined
Workshop section and obtain yellow phosphorus product, and K2O then with circulated sprinkling system in phosphatase reaction after become K+Enter into circulated sprinkling system
In, when pH value is 4.4-4.6 in monitoring circulated sprinkling system, K will be contained+Liquid is purified, evaporation, cooling, crystallization, dry
Potassium dihydrogen phosphate product, the wherein temperature controlling range of circulated sprinkling system are 50～90 DEG C.
The mass concentration of the phosphoric acid is 25-45%.
Contain K before crystallization+Liquid through filtering it is miscellaneous.
The dedoping step selects plate and frame filter press to carry out.
Temperature control in circulated sprinkling system cools down realization indirectly by heat exchanger.
Embodiment 3（Phosphorus ore containing potassium prepares yellow phosphorus coproduction dipotassium hydrogen phosphate）：
Phosphorus ore containing potassium is put in the electric furnace of production yellow phosphorus, the K in phosphorus ore containing potassium2Escape with furnace gas after O distillations, by band
There is K2The furnace gas of O is passed through circulated sprinkling system, and the phosphorus in furnace gas is condensed into liquid phosphor in circulated sprinkling system and enters refined
Workshop section and obtain yellow phosphorus product, and K2O then with circulated sprinkling system in phosphatase reaction after become K+Enter into circulated sprinkling system
In, when pH value is 8.5-9.0 in monitoring circulated sprinkling system, K will be contained+Liquid is purified, evaporation, cooling, crystallization, dry
Dipotassium hydrogen phosphate product, the wherein temperature controlling range of circulated sprinkling system are 50～90 DEG C.
The mass concentration of the phosphoric acid is 25-45%.
Contain K before crystallization+Liquid through filtering it is miscellaneous.
The dedoping step selects plate and frame filter press, millipore filter to carry out.
Temperature control in circulated sprinkling system cools down realization indirectly by heat exchanger.
Embodiment 4（Phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate）：
Phosphorus ore containing potassium is put in the electric furnace of production yellow phosphorus, the K in phosphorus ore containing potassium2Escape with furnace gas after O distillations, by band
There is K2The furnace gas of O is passed through circulated sprinkling system, and the phosphorus in furnace gas is condensed into liquid phosphor in circulated sprinkling system and enters refined
Workshop section and obtain yellow phosphorus product, and K2O then with circulated sprinkling system in phosphatase reaction after become K+Enter into circulated sprinkling system
In, when pH value is 11.5-12.5 in monitoring circulated sprinkling system, K will be contained+Liquid it is purified, evaporation, cooling, crystallization, be dried
Potassium phosphate product is obtained, the wherein temperature controlling range of circulated sprinkling system is 50～90 DEG C.
The mass concentration of the phosphoric acid is 25-45%.
Contain K before crystallization+Liquid through filtering it is miscellaneous.
The dedoping step selects plate and frame filter press to carry out.
Temperature control in circulated sprinkling system cools down realization indirectly by heat exchanger.
Finally, so that phosphorus ore containing potassium prepares yellow phosphorus coproduction dipotassium hydrogen phosphate as an example, illustrate that the employing present invention is obtained in that huge
Big economic worth.Calculated according to yellow phosphorus electric furnace 25000KVA, indices see the table below 1：
In a word, production technology of the present invention did not also propose in current phosphorus production that usefulness of the present invention existed
It is in can not only realize producing yellow phosphorus using low grade potassium-containing rock phosphate in powder, moreover it is possible to obtain the phosphoric acid potassium salt product of high added value, real
The comprehensive utilization of existing low grade potassium-containing phosphorus ore resource, reduces supplies consumption and energy saving, effectively reduces production cost, can
Obtain the purposes such as huge economic benefit.
As described above, the present invention preferably can be realized.
Claims (6)
1. a kind of method that phosphorus ore containing potassium prepares yellow phosphorus coproduction potassium phosphate, it is characterised in that potassium phosphorus ore will be contained and put into production
K in the electric furnace of yellow phosphorus, in phosphorus ore containing potassium2Escape with furnace gas after O distillations, will be with K2The furnace gas of O is passed through circulated sprinkling system,
Phosphorus in furnace gas is condensed into liquid phosphor in circulated sprinkling system and obtains yellow phosphorus product into refinement, and K2O then and
Become K after phosphatase reaction in circulated sprinkling system+Enter in circulated sprinkling system, monitor pH value in circulated sprinkling system
When can generate the potassium phosphate of needs, K will be contained+Liquid Jing removal of impurities, evaporation, cooling, crystallization, be dried prepared potassium phosphate and produce
Product, the wherein temperature controlling range of circulated sprinkling system are 50～90 DEG C.
2. the method that a kind of phosphorus ore containing potassium according to claim 1 prepares yellow phosphorus coproduction potassium phosphate, it is characterised in that institute
The mass concentration for stating phosphoric acid is 25-45%.
3. the method that a kind of phosphorus ore containing potassium according to claim 1 prepares yellow phosphorus coproduction potassium phosphate, it is characterised in that knot
Contain K before crystalline substance+Liquid through filtering it is miscellaneous.
4. the method that a kind of phosphorus ore containing potassium according to claim 3 prepares yellow phosphorus coproduction potassium phosphate, it is characterised in that institute
Stating dedoping step selects plate and frame filter press, millipore filter to carry out.
5. the method that a kind of phosphorus ore containing potassium according to claim 1 prepares yellow phosphorus coproduction potassium phosphate, it is characterised in that follow
Temperature control in ring spray system is to cool down indirectly realization by heat exchanger.
6. the method that a kind of phosphorus ore containing potassium according to any one of claim 1-5 prepares yellow phosphorus coproduction potassium phosphate, which is special
Levy and be, when the pH value is controlled to 4.4-4.6, potassium phosphate is potassium dihydrogen phosphate；When pH value is controlled to 8.5-9.0, phosphoric acid
Sylvite is dipotassium hydrogen phosphate；When pH value is controlled to 11.5-12.5, potassium phosphate is potassium phosphate.
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| CN101434386A (en) * | 2007-11-12 | 2009-05-20 | 黄明科 | Method for producing fine phosphate by using dilute acid to decompose middle and low grade phosphate ore using |
| CN103910348B (en) * | 2014-03-31 | 2016-04-13 | 成都易态科技有限公司 | The Application way of potassium felspar sand |
| CN104276549B (en) * | 2014-09-29 | 2015-06-24 | 武汉工程大学 | Low-impurity yellow phosphorus production method based on yellow phosphorus production technological process control |
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Effective date of registration: 20181220 Address after: 614000 No. 2, 1 building, 151 South Phoenix Road, Leshan, Sichuan, China. Patentee after: Sichuan new phosphorus Environmental Protection Technology Co., Ltd. Address before: 610000 No. 14, 26 Gaosheng Bridge, Wuhou District, Chengdu, Sichuan 303 Patentee before: Chengdu Leshi Chemical Engineering Co., Ltd. |
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Effective date of registration: 20191008 Address after: 610041 No.704, floor 7, building 1, No.69, Tianfu Third Street, Chengdu high tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu high tech Zone, Sichuan Province Patentee after: Chengdu Tianyu new phosphorus Technology Co., Ltd. Address before: 614000 No. 2, 1 building, 151 South Phoenix Road, Leshan, Sichuan, China. Patentee before: Sichuan new phosphorus Environmental Protection Technology Co., Ltd. |
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