CN105314605A - System for producing calcium superphosphate by using medium- and low-grade phosphate rocks - Google Patents
System for producing calcium superphosphate by using medium- and low-grade phosphate rocks Download PDFInfo
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- CN105314605A CN105314605A CN201410492932.2A CN201410492932A CN105314605A CN 105314605 A CN105314605 A CN 105314605A CN 201410492932 A CN201410492932 A CN 201410492932A CN 105314605 A CN105314605 A CN 105314605A
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- phosphoric acid
- calcium superphosphate
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Abstract
The invention discloses a system for producing calcium superphosphate by using medium- and low-grade phosphate rocks and relates to the field of calcium superphosphate. The system comprises the steps: uniformly mixing 98% sulfuric acid and P2O5 containing 7-8% diluted phosphoric acid in an acid mixer thoroughly, then, adding the acid mixture into a reaction tank, meanwhile, adding P2O5 containing 18% ore slurry into the reaction tank, carrying out thorough reaction, enabling material slurry to enter an intermediate tank for grain growing, subjecting qualified material slurry to liquid-solid separation by a filter I, storing finished product phosphoric acid in a phosphoric acid storage tank, subjecting phosphogypsum to washing-water washing by a filter II, then, storing the phosphogypsum in a storage yard, conveying produced dilute phosphoric acid to the reaction tank, lowering the density of the material slurry in the reaction tank, further recovering phosphorus, and treating exhaust gas generated by the reaction tank by a pipeline III; and adding the finished product phosphoric acid into the mixer through an acid conveying pump together with the P2O5 containing 18% ore slurry and the 98% sulfuric acid, feeding produced calcium superphosphate slurry into an aging tank, and packaging and warehousing aged calcium superphosphate. According to the system, the production cost is low, medium- and low-grade phosphate rock resources can be efficiently utilized, and the finished product is loose and is not liable to caking.
Description
Technical field
The present invention relates to technical field of production of superphosphate, specifically one utilizes mid low grade phosphate rock to produce calcium superphosphate system.
Background technology
Calcium phosphate is farm crop base fertilizers, nutrition can be provided, soil can be improved again and increase soil fertility, phosphorus can not only be provided to farm crop, moderate-element calcium, magnesium, sulphur and trace elements iron, manganese, silicon etc. can also be provided, be binary, Nitrogen, Phosphorus and Potassium cannot replace, particularly can improve salt affected soil area.At present, utilize low-grade phosphate ore to produce calcium superphosphate, product can not be up to standard, but higher-grade Rock Phosphate (72Min BPL) is expensive and rare, causes the production cost of calcium superphosphate higher.And in phosphate rock resource, higher-grade high-quality ore bed accounting example is quite few, middle-low grade accounting example is quite large, now exploits phosphorus ore, based on higher-grade high-quality, and middle-low grade abandoned.Therefore, mid low grade phosphate rock production calcium superphosphate is developed extremely urgent.
Summary of the invention
For overcoming the deficiencies in the prior art, goal of the invention of the present invention is to provide one to utilize mid low grade phosphate rock to produce calcium superphosphate system, with the object realizing utilizing the mid low grade phosphate rock of phosphorous 16%-22% to produce all size calcium superphosphate.
For achieving the above object, first use ore and sulfuric acid reaction preparing phosphoric acid, recycles the phosphoric acid of production and sulfuric acid mixing is rear and ore reacts, production calcium superphosphate;
By from pipeline one 98% sulfuric acid and from pipeline containing P
2o
5the light phosphoric acid of 7-8% adds reactive tank after sour mixing tank is fully mixed, simultaneously by from pipeline two containing P
2o
5the ore pulp of 18% adds reactive tank, after the abundant reaction of 4.5-5h, slip enters medial launder and carries out growing the grain, and qualified slurry is after filter one solid-liquor separation, and finished product phosphoric acid enters phosphoric acid hold-up vessel and stores, phosphogypsum is after filter two is further with washing water washing, send ardealite storage yard to deposit, the light phosphoric acid of generation is delivered to reactive tank, reduces the pulp density in reactive tank, further recovery phosphorus, the tail gas that reactive tank produces processes through pipeline three;
Finished product phosphoric acid through defeated sour pump with from pipeline two containing P
2o
5the ore pulp of 18%, from pipeline 98% sulfuric acid add mixing tank together, the calcium superphosphate slip of generation is sent into and is changed into pond and change into, and the calcium superphosphate after slaking reaches packaging warehouse-in after standard.
The temperature of described reactive tank is 79-89 DEG C; The temperature 40-50 DEG C of phosphoric acid hold-up vessel; The temperature of mixing tank is 115 ± 2 DEG C.
The present invention is on the basis of former calcium superphosphate technical process, a set of phosphoric acid extraction apparatus system is increased before mixing tank, by ore pulp and sulfuric acid decomposition, filter and obtain phosphoric acid, according to produced calcium superphosphate kind, the concentration of ore pulp and the full phosphorus of ore pulp, be metered into and sulfuric acid, phosphorolytic cleavage mix and blend in proportion, mixes and change into calcium superphosphate.
The present invention compared with prior art, has the following advantages:
1, the ore grade used is low, and product nutrient is high, uses containing P at present
2o
5the ore of 24%, just can the general calcium of output 12%, and this system uses the ore of 16-22%, and can produce the normal superphosphate of 12-16%, and maintain characteristic and the function of traditional normal superphosphate, production cost is low, effectively can utilize Mid-and low-grade phosphate rock resources.
2, finished product loosens, prevented from caking.
Accompanying drawing explanation
Fig. 1 is system flow simplified schematic diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention first uses ore and sulfuric acid reaction preparing phosphoric acid, reacts with ore, production calcium superphosphate after the phosphoric acid that recycling is produced and sulfuric acid mixing.
By from pipeline 1 98% sulfuric acid and from pipeline 8 containing P
2o
5the light phosphoric acid of 7-8% adds reactive tank 3 after sour mixing tank is fully mixed, simultaneously by from pipeline 22 containing P
2o
5the ore pulp of 18% adds reactive tank 3, after the abundant reaction of 4.5-5h, slip enters medial launder 4 and carries out growing the grain, and qualified slurry is after filter 1 solid-liquor separation, and finished product phosphoric acid enters phosphoric acid hold-up vessel 7 and stores, phosphogypsum is after filter 26 washs with washing water 9 further, send ardealite storage yard to deposit, the light phosphoric acid of generation is delivered to reactive tank 3, reduces the pulp density in reactive tank 3, further recovery phosphorus, the tail gas that reactive tank 3 produces processes through pipeline 3 10; From pipeline 1 with under meter 1 and under meter 2 15 are housed on pipeline two.
Finished product phosphoric acid through defeated sour pump 13 with from pipeline 22 containing P
2o
5the ore pulp of 18%, from pipeline 1 98% sulfuric acid add mixing tank 11 together, the calcium superphosphate slip of generation is sent into and is changed into pond 12 and change into, and the calcium superphosphate after slaking reaches packaging warehouse-in after standard.
The temperature of described reactive tank 3 is 79-89 DEG C; The temperature 40-50 DEG C of phosphoric acid hold-up vessel 7; The temperature of mixing tank 11 is 115 ± 2 DEG C.
Starting material of the present invention are the Rock Phosphate (72Min BPL) of 18% and the sulfuric acid of 98%, and the phosphoric acid of production is containing P
2o
5be 15.5%, be respectively 12%, 14%, 16% calcium superphosphate for production specification.
1 ton containing P
2o
5it is 0.9 ton that the phosphoric acid of 15.5% consumes Rock Phosphate (72Min BPL), and consuming sulfuric acid amount is 0.60 ton.
Embodiment one:
If produce 1 ton containing P
2o
5the calcium superphosphate of 12%, the phosphoric acid amount consuming 15.5% is 0.30 ton, and the Rock Phosphate (72Min BPL) of 18% 0.41 ton, the sulfuric acid of 98% is 0.12 ton.
Add up to: consume containing P
2o
5the Rock Phosphate (72Min BPL) amount of 18% is 0.3 × 0.9t+0.41t=0.68t
The sulfuric acid amount consuming 98% is 0.3 × 0.6t+0.12t=0.30t.
Embodiment two:
If produce 1 ton containing P
2o
5the general calcium of 14%, then the phosphoric acid amount consuming 15.5% is 0.40 ton, and the Rock Phosphate (72Min BPL) of 18% 0.544 ton, the sulfuric acid of 98% is 0.16 ton.
Add up to: consume containing P
2o
5the Rock Phosphate (72Min BPL) amount of 18% is 0.4 × 0.9t+0.544t=0.904t
The sulfuric acid amount consuming 98% is 0.4 × 0.6t+0.16t=0.40t.
Embodiment three:
If produce 1 ton containing P
2o
5the general calcium of 16%, then the phosphoric acid amount consuming 15.5% is 0.50 ton, and the Rock Phosphate (72Min BPL) of 18% 0.46 ton, the sulfuric acid of 98% is 0.27 ton.
Add up to: consume containing P
2o
5the Rock Phosphate (72Min BPL) amount of 18% is 0.5 × 0.9t+0.46t=0.91t
The sulfuric acid amount consuming 98% is 0.5 × 0.6t+0.27t=0.57t.
Claims (2)
1. utilize mid low grade phosphate rock to produce a calcium superphosphate system, it is characterized in that: first use ore and sulfuric acid reaction preparing phosphoric acid, after the phosphoric acid that recycling is produced and sulfuric acid mixing and ore react, production calcium superphosphate;
Will from the sulfuric acid of 98% of pipeline one (1) and from pipeline (8) containing P
2o
5the light phosphoric acid of 7-8% adds reactive tank (3) after sour mixing tank is fully mixed, simultaneously will from pipeline two (2) containing P
2o
5the ore pulp of 18% adds reactive tank (3), after the abundant reaction of 4.5-5h, slip enters medial launder (4) and carries out growing the grain, qualified slurry is after filter one (5) solid-liquor separation, finished product phosphoric acid enters phosphoric acid hold-up vessel (7) and stores, phosphogypsum is after filter two (6) uses washing water (9) to wash further, ardealite storage yard is sent to deposit, the light phosphoric acid produced is delivered to reactive tank (3), reduce the pulp density in reactive tank (3), further recovery phosphorus, the tail gas that reactive tank (3) produces processes through pipeline three (10);
Finished product phosphoric acid through defeated sour pump (13) with from pipeline two (2) containing P
2o
5the ore pulp of 18%, from pipeline (1) 98% sulfuric acid add mixing tank (11) together, the calcium superphosphate slip of generation is sent into and is changed into pond (12) and change into, and the calcium superphosphate after slaking reaches packaging warehouse-in after standard.
2. the mid low grade phosphate rock that utilizes according to claim 1 produces calcium superphosphate system, it is characterized in that: the temperature of described reactive tank (3) is 79-89 DEG C; The temperature 40-50 DEG C of phosphoric acid hold-up vessel (7); The temperature of mixing tank (11) is 115 ± 2 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492932.2A CN105314605A (en) | 2014-09-24 | 2014-09-24 | System for producing calcium superphosphate by using medium- and low-grade phosphate rocks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492932.2A CN105314605A (en) | 2014-09-24 | 2014-09-24 | System for producing calcium superphosphate by using medium- and low-grade phosphate rocks |
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| CN105314605A true CN105314605A (en) | 2016-02-10 |
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|---|---|---|---|
| CN201410492932.2A Pending CN105314605A (en) | 2014-09-24 | 2014-09-24 | System for producing calcium superphosphate by using medium- and low-grade phosphate rocks |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723712A (en) * | 2009-12-10 | 2010-06-09 | 凌抗生 | Method for producing calcium superphosphate through two steps |
| CN101913571A (en) * | 2010-09-10 | 2010-12-15 | 湖北华农生物科技有限公司 | Technological process for producing calcium superphosphate by using low-grade phosphate ores |
-
2014
- 2014-09-24 CN CN201410492932.2A patent/CN105314605A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723712A (en) * | 2009-12-10 | 2010-06-09 | 凌抗生 | Method for producing calcium superphosphate through two steps |
| CN101913571A (en) * | 2010-09-10 | 2010-12-15 | 湖北华农生物科技有限公司 | Technological process for producing calcium superphosphate by using low-grade phosphate ores |
Non-Patent Citations (1)
| Title |
|---|
| 云南磷肥厂 昆明工学院化工系: "昆阳中低品位磷矿综合利用实验研究报告—二水流程萃取磷酸", 《云南化工技术》 * |
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Application publication date: 20160210 |
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