CN106242644A - A kind of preparation method of normal superphosphate - Google Patents
A kind of preparation method of normal superphosphate Download PDFInfo
- Publication number
- CN106242644A CN106242644A CN201610663240.9A CN201610663240A CN106242644A CN 106242644 A CN106242644 A CN 106242644A CN 201610663240 A CN201610663240 A CN 201610663240A CN 106242644 A CN106242644 A CN 106242644A
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- CN
- China
- Prior art keywords
- phosphoric acid
- normal superphosphate
- preparation
- sewage treatment
- raffinate
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses the preparation method of a kind of normal superphosphate, belong to phosphorous chemical industry three-protection design and fertilizer preparing technical field, a kind of method utilizing phosphoric acid sludge, raffinate, phosphate fertilizer plant's sewage treatment slag and sulphuric acid to prepare normal superphosphate for raw material.Its production stage is as follows: mixed homogeneously by a certain percentage with raffinate, concentrated sulphuric acid by phosphoric acid sludge, it is subsequently adding a certain amount of phosphoric acid plant sewage treatment slag and carries out quick hybrid reaction, after reaction, material is dried, through crushing, be packaged to be normal superphosphate product after being dried.The present invention consumes phosphoric acid sludge, phosphoric acid plant sewage treatment slag and raffinate, and production cost is relatively low, and has reached to protect phosphate rock resource and the effect of ecological environment, has huge economic benefit, social benefit and environmental benefit.
Description
Technical field
The present invention relates to phosphorous chemical industry three-protection design and fertilizer preparation field, one utilizes phosphoric acid sludge, extraction specifically
Spent acid, phosphate fertilizer plant's sewage treatment slag and sulphuric acid are the method that normal superphosphate prepared by raw material.
Background technology
Phosphoric acid sludge be wet-process phosphoric acid concentration be that sludge and the phosphoric acid purification process after strong phosphoric acid sedimentation produces the mixed of sludge
Compound, raffinate is that wet method strong phosphoric acid is carrying out the spent acid of generation in purification process, and sewage treatment slag is raw to phosphoric acid by wet process
The large amount of sewage produced in product carries out processing obtained waste residue, and sewage treatment slag, phosphoric acid sludge and raffinate all contain in a large number
Effective P2O5, the great wasting of resources can be caused if not being used and to environment, therefore research and utilization is above-mentioned useless
Slag is prepared normal superphosphate product and is had good economic benefit and social benefit.
" production method of a kind of general calcium ", this patent is disclosed in the patent documentation of Application No. 201510113423.9
The sludge produced in wet-process phosphoric acid concentration and phosphorite tailings powder, magnesium powder and calcium carbonate is used to produce the general calcium product of high magnesium.Should
Sludge after phosphoric acid sludge all strong phosphoric acid plate-and-frame filtration that invention uses, different with the phosphoric acid sludge of the present invention, and
What this invention produced is the general calcium product of high magnesium, and the response time is longer.
The patent documentation of Application No. 201210457927.9 discloses " one utilize phosphoric acid slag produce calcium superphosphate
Production method ", this patent uses phosphoric acid slag and phosphorus ore to carry out mixture in mass ratio, then reacts with sulphuric acid.This invention
The thing that gathers dust when middle phosphoric acid slag is phosphorus production, different from raw material of the present invention, and this invention reaction temperature is higher, to equipment and materials
Require height.
Summary of the invention
Present invention aim to provide one can make full use of phosphoric acid sludge, sewage treatment slag, sulphuric acid and raffinate
Acid produces the method for normal superphosphate, and the method uses waste residue to replace phosphorus ore, has that technique is simple, with low cost, ring
The advantages such as border is friendly.
The technical scheme that the present invention provides: the preparation method of a kind of normal superphosphate, its preparation process includes:
(1) phosphoric acid sludge 20-50 part is mixed homogeneously with raffinate 6-8 part, concentrated sulphuric acid 6-8 part；
(2) add phosphoric acid plant sewage treatment slag 20-70 part and carry out quick hybrid reaction；
(3) after reaction, material is dried, the most size-reduced, be packaged to be normal superphosphate product.
Total P of phosphoric acid sludge used by above-mentioned reaction2O5Content is 20%-30%, water solublity P2O5For 15%-20%.
The P of raffinate used by above-mentioned reaction2O5Content is 40%-48%.
The P of phosphoric acid plant sewage treatment slag used by above-mentioned reaction2O5Content is 10%-28%.
Concentrated sulphuric acid used by above-mentioned reaction is 65%-100%H by weight2SO4Sulphuric acid.
Above-mentioned course of reaction need not heat.
The above-mentioned response time is 1-5min.
In above-mentioned steps (3), baking temperature is 40-60 DEG C.
The effective P of normal superphosphate product that above-mentioned reaction prepares2O5>=16%, water solublity P2O5>=12%, free acid≤
5.5%, moisture≤6%, meet domestic normal superphosphate Grade A quality index requirement.
Compared with prior art, this invention consumes phosphoric acid sludge, phosphate fertilizer plant's sewage treatment slag and raffinate, it is not necessary to add
Enter phosphorus concentrate, not only reduce production cost but also make phosphoric acid sludge, sewage treatment slag, raffinate be fully used, improve phosphorus
Effective rate of utilization, for phosphorus element cascade utilization lay the first stone, this invention has huge economic benefit, social benefit and environmental protection
Benefit.
Accompanying drawing explanation
Fig. 1 is the process chart of the production method of the present invention.
Detailed description of the invention
Below by way of specific embodiment, the present invention is described in further details, but is not intended to limit the scope of the present invention.
Embodiment 1:
Weigh 200g strong phosphoric acid sludge, add 60g raffinate, after stirring and evenly mixing, add 80g concentrated sulphuric acid, add while stirring
700 g sewage treatment slags, after stirring hybrid reaction 5min, are dried material, baking temperature 60 DEG C, obtain common peroxophosphoric acid
Calcium product.This product is mainly composed of through analyzing: total P2O5It is 18.2%, effective P2O5It is 16.8%, water-soluble P2O5For
12.6%, free acid content is 4.8%, and moisture is 5.8%.Meet domestic normal superphosphate Grade A quality index to want
Ask
Embodiment 2:
Weigh 500 g strong phosphoric acid sludges, add 80 g raffinates, after stirring and evenly mixing, add 60g concentrated sulphuric acid, add while stirring
Enter 200 g sewage treatment slags, after stirring hybrid reaction 1min, material is dried, baking temperature 40 DEG C, obtain and commonly cross phosphorus
Acid calcium product.This product is mainly composed of through analyzing: total P2O5It is 18.4%, effective P2O5It is 17.1%, water-soluble P2O5For
13.1%, free acid content is 4.4%, and moisture is 5.6%.Meet domestic normal superphosphate Grade A quality index to want
Ask.
Embodiment 3:
Weigh 450g strong phosphoric acid sludge, add 65 g raffinates, after stirring and evenly mixing, add 75 g concentrated sulphuric acids, add while stirring
Enter 400 g sewage treatment slags, after stirring reaction 3min, material is dried, baking temperature 50 DEG C, obtains normal superphosphate
Product.This product is mainly composed of through analyzing: total P2O5It is 18.6%, effective P2O5It is 17.4%, water-soluble P2O5It is 14.2%,
Free acid content is 4.1%, and moisture is 5.4%.Meet domestic normal superphosphate Grade A quality index requirement.
Claims (8)
1. the preparation method of a normal superphosphate, it is characterised in that its preparation process includes:
(1) phosphoric acid sludge 20-50 part is mixed homogeneously with raffinate 6-8 part, sulphuric acid 6-8 part；
(2) add phosphoric acid plant sewage treatment slag 20-70 part and carry out quick hybrid reaction；
(3) after reaction, material is dried, the most size-reduced, be packaged to be normal superphosphate product.
2. the preparation method of normal superphosphate as claimed in claim 1, total P of described phosphoric acid sludge2O5Content is 20%-
30%, water solublity P2O5For 15%-20%.
3. the preparation method of normal superphosphate as claimed in claim 1, the P of described raffinate2O5Content is 40%-48%.
4. the preparation method of normal superphosphate as claimed in claim 1, the P of described phosphoric acid plant sewage treatment slag2O5Content is
15%-28%。
5. the preparation method of normal superphosphate as claimed in claim 1, it is characterised in that described concentrated sulphuric acid is by weight
65%-100%H2SO4Sulphuric acid.
6. the preparation method of normal superphosphate as claimed in claim 1, it is characterised in that described reaction need not be heated；Reaction
Time is 1-5min.
7. the preparation method of normal superphosphate as claimed in claim 1, it is characterised in that in described step (3), be dried temperature
Degree is for 40-60 DEG C.
8. the preparation method of normal superphosphate as claimed in claim 1, it is characterised in that prepared normal superphosphate produces
The effective P of product2O5>=16%, water solublity P2O5>=12%, free acid≤5.5%, moisture≤6%, meet domestic normal superphosphate
Grade A quality index requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663240.9A CN106242644A (en) | 2016-08-15 | 2016-08-15 | A kind of preparation method of normal superphosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663240.9A CN106242644A (en) | 2016-08-15 | 2016-08-15 | A kind of preparation method of normal superphosphate |
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| Publication Number | Publication Date |
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| CN106242644A true CN106242644A (en) | 2016-12-21 |
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ID=57592739
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610663240.9A Pending CN106242644A (en) | 2016-08-15 | 2016-08-15 | A kind of preparation method of normal superphosphate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279921A (en) * | 2018-11-16 | 2019-01-29 | 贵州昊华工程技术有限公司 | A method of efficient calcium superphosphate is produced using industrial waste mixed acid |
| CN114180993A (en) * | 2021-12-31 | 2022-03-15 | 贵州越都化工有限公司 | Process method for preparing high-magnesium superphosphate by adopting phosphoric acid sludge and high-magnesium tailings |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367672A (en) * | 2008-09-26 | 2009-02-18 | 瓮福（集团）有限责任公司 | Manufacturing method of high concentration enrich superphosphate phosphorus fertilizer |
| CN105367161A (en) * | 2015-10-30 | 2016-03-02 | 贵州开磷集团股份有限公司 | Method for preparing compound fertilizer by utilizing phosphorus-containing sewage |
-
2016
- 2016-08-15 CN CN201610663240.9A patent/CN106242644A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367672A (en) * | 2008-09-26 | 2009-02-18 | 瓮福（集团）有限责任公司 | Manufacturing method of high concentration enrich superphosphate phosphorus fertilizer |
| CN105367161A (en) * | 2015-10-30 | 2016-03-02 | 贵州开磷集团股份有限公司 | Method for preparing compound fertilizer by utilizing phosphorus-containing sewage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279921A (en) * | 2018-11-16 | 2019-01-29 | 贵州昊华工程技术有限公司 | A method of efficient calcium superphosphate is produced using industrial waste mixed acid |
| CN114180993A (en) * | 2021-12-31 | 2022-03-15 | 贵州越都化工有限公司 | Process method for preparing high-magnesium superphosphate by adopting phosphoric acid sludge and high-magnesium tailings |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161221 |
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