CN112321333A - Method for producing high-end common calcium by using B1 layers of phosphate ore - Google Patents
Method for producing high-end common calcium by using B1 layers of phosphate ore Download PDFInfo
- Publication number
- CN112321333A CN112321333A CN202011375172.9A CN202011375172A CN112321333A CN 112321333 A CN112321333 A CN 112321333A CN 202011375172 A CN202011375172 A CN 202011375172A CN 112321333 A CN112321333 A CN 112321333A
- Authority
- CN
- China
- Prior art keywords
- superphosphate
- percent
- layers
- calcium
- qualified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 26
- 239000011575 calcium Substances 0.000 title claims abstract description 26
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 18
- 239000010452 phosphate Substances 0.000 title claims abstract description 18
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002426 superphosphate Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 10
- 235000019691 monocalcium phosphate Nutrition 0.000 claims abstract description 10
- 238000005469 granulation Methods 0.000 claims abstract description 9
- 230000003179 granulation Effects 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 241000276489 Merlangius merlangus Species 0.000 abstract 3
- 235000021317 phosphate Nutrition 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 239000002367 phosphate rock Substances 0.000 description 8
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000003337 fertilizer Substances 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/08—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
Abstract
The invention discloses a method for producing high-end calcium superphosphate by using B1 layers of phosphate ore, which comprises the following steps of: (590-600), taking the ordinary superphosphate obtained after the reaction of the B1 layer ore and sulfuric acid, curing to be qualified, taking the qualified coarse whiting powder, uniformly mixing the qualified coarse whiting powder with the qualified material in the last step through a mixer, wherein the effective P of the coarse whiting is2O5More than or equal to 45 percent; feeding the mixed material flow into a granulator through a belt conveyor for granulation, and drying through a dryer to obtain high-nutrient granular calcium superphosphate dry materials; and (3) feeding the dried material from the granulation dryer into a screening machine, screening to obtain a high-end common calcium product with particles of 2-4.8mm, and cooling to obtain the high-nutrient common calcium product. The invention can digest B1 layers of phosphate ore inside an enterprise, and can also increase the economic benefit of the enterprise when producing high-nutrient ordinary calcium.
Description
Technical Field
The present invention relates to calcium fertilizers, further to calcium superphosphate, and in particular to the production of high nutrient calcium superphosphate.
Background
The B1 layer phosphate ore is mainly produced from the residue after the phosphate ore is selected, has medium and low grade, high magnesium, high silicon, high power oxide, black and high hardness, and is generally treated as waste by adopting a stockpiling mode. With the continuous expansion of production scale, the high-grade phosphorite cannot meet the production requirement, and how to recycle and change waste into valuable is one of the problems of consumption reduction and emission reduction.
In the Chinese patent database, the application parts relating to the production of ordinary superphosphate by using low-grade phosphorite include No. CN 201510212057.2A method for producing ordinary superphosphate by using a low-grade phosphorite mixed acid method, No. CN201510072686.X A method for co-producing various phosphates and phosphate fertilizers by using low-grade phosphorite, and No. CN02113183.X A process for granulating ordinary superphosphate. The methods have various characteristics, but the technical proposal for producing the high-nutrient calcium superphosphate by utilizing B1 layers of phosphate ores is not available up to now.
Disclosure of Invention
The invention aims to provide a method for producing high-nutrient ordinary superphosphate by using medium-low grade phosphorite with high impurity content, so that a manufacturer who not only has phosphorite picking but also has ordinary superphosphate production can digest B1 layers of phosphorite inside an enterprise, and the economic benefit of the enterprise can be increased by producing the high-nutrient ordinary superphosphate.
The idea of the inventor is as follows: adopting B1 layers of phosphate ore and sulfuric acid as the basis to produce low-end products, adding a material mixing process, adding qualified heavy calcium powder in proportion, metering, feeding into a granulator for granulation, drying, screening and cooling to obtain the product.
The invention provides a method for producing high-nutrient ordinary superphosphate by using medium-low grade phosphorite with high impurity content, which comprises the following steps:
(1) according to the mass ratio of ore to acid (400-410): (590-600), taking the B1 layer ore to react with sulfuric acid to obtain common calcium superphosphate, and curing to be qualified;
(2) taking qualified heavy calcium powder, and uniformly mixing the qualified heavy calcium powder with the materials in the previous step through a mixer, wherein the adding mass fraction of the heavy calcium powder and the ordinary calcium is (10.0-11.0%): (89.0-90.0%) triple superphosphate effective P2O5≥45%；
(3) Feeding the mixed material flow into a granulator through a belt conveyor for granulation, and drying through a dryer to obtain high-nutrient granular calcium superphosphate dry materials;
(4) feeding the dried material from the granulation dryer into a screening machine, screening to obtain a high-end common calcium product with particles of 2-4.8mm, cooling, and packaging as a finished product; the granules larger than 4.8mm are crushed and then return to a granulator together with the granules smaller than 2 mm; removing dust from tail gas of the granulating dryer by a dust remover, and feeding the collected dust into the granulator again; and the tail gas enters a washer after being dedusted, is washed by water, and is subjected to defoaming and emptying through a defoaming layer.
The grade of the B1 layer phosphate ore used as the raw material is 29 percent P2O5Sulfuric acid 98% H2SO4Triple superphosphate effective P2O5≥43%。
The quality index of the high-end common calcium product of the granules is total P2O5Not less than 20.0% of P2O5Not less than 19.5 percent of water P2O5More than or equal to 16.0 percent, the granularity (2-4.8 mm) more than or equal to 95 percent, the free acid less than or equal to 5 percent, the strength more than or equal to 30N, the water content less than or equal to 5 percent and black appearance.
The drying temperature is 550-650 ℃.
The inventor points out that: the heavy calcium powder is added into the material because: ensure that P is contained in the nutrient of the mixed product2O5The content is greater than or equal to 19.5 percent.
The invention has the beneficial effects that: consumes B1 layers of phosphate ore, digests the middle and low grade phosphate ore in the enterprise, reduces the mine stockpiling pressure, produces high nutrient products with better market abroad, reduces the production cost and has obvious profit. Is suitable for manufacturers of existing phosphate ore dressing and calcium fertilizer production.
Detailed Description
Example (b): the ordinary calcium production device of a certain chemical industry Co., Ltd in Guizhou, which is entrusted to be processed by a certain company with limited responsibility, is measured according to the mass ratio of ore to acid of 400: 600, taking the ordinary superphosphate obtained by reacting the B1 layer ore with sulfuric acid, curing to be qualified, taking qualified heavy calcium powder, and uniformly mixing the qualified heavy calcium powder with the qualified material in the previous step through a mixer, wherein the adding mass fraction of the heavy calcium powder and the ordinary superphosphate is 10.5%: 89.5 percent of triple superphosphate effective P2O5≥45%；Feeding the mixed material flow into a granulator through a belt conveyor for granulation, and drying through a dryer to obtain high-nutrient granular calcium superphosphate dry materials; and (3) feeding the dried material from the granulation dryer into a screening machine, screening to obtain a high-end common calcium product with particles of 2-4.8mm, and cooling to obtain the high-nutrient common calcium product. The product quality indexes are as follows:
total P2O5≥20.0％
Has P2O5≥19.5%
Water P2O5≥16.0%
The particle size (2-4.8 mm) is more than or equal to 95 percent
The free acid is less than or equal to 5 percent
Strength is more than or equal to 30N
The water content is less than or equal to 5 percent
Corrosive acid is more than or equal to 0.3 percent
The black product contains corrosive acids which are very popular in the Australian market.
Claims (4)
1. A method for producing high-end ordinary superphosphate by utilizing B1 layers of phosphate ores is characterized by comprising the following steps:
(1) according to the mass ratio of ore to acid (400-410): (590-600), taking the B1 layer ore to react with sulfuric acid to obtain common calcium superphosphate, and curing to be qualified;
(2) taking qualified heavy calcium powder, and uniformly mixing the qualified heavy calcium powder with the materials in the previous step through a mixer, wherein the adding mass fraction of the heavy calcium powder and the ordinary calcium is (10.0-11.0%): (89.0-90.0%) triple superphosphate effective P2O5≥45%；
(3) The mixed materials are sent into a granulator for granulation through a belt conveyor, and are dried through a dryer to obtain high-nutrient granular calcium superphosphate dried materials;
(4) feeding the dried material from the granulation dryer into a screening machine, screening to obtain a high-end common calcium product with particles of 2-4.8mm, cooling, and packaging as a finished product; the granules larger than 4.8mm are crushed and then return to a granulator together with the granules smaller than 2 mm; removing dust from tail gas of the granulating dryer by a dust remover, and feeding the collected dust into the granulator again; and the tail gas enters a washer after being dedusted, is washed by water, and is subjected to defoaming and emptying through a defoaming layer.
2. The method for producing high-end superphosphate by utilizing B1 layers of phosphate ores as claimed in claim 1, wherein the grade of the B1 layers of phosphate ores used as raw materials is 29 percent P2O5Sulfuric acid 98% H2SO4Triple superphosphate effective P2O5≥43%。
3. The method for producing high-end superphosphate by using B1 layers of phosphate ores as claimed in claim 1, wherein the quality index of the high-end superphosphate granules is total P2O5Not less than 20.0% of P2O5Not less than 19.5 percent of water P2O5More than or equal to 16.0 percent, the granularity (2-4.8 mm) more than or equal to 95 percent, the free acid less than or equal to 5 percent, the strength more than or equal to 30N, the water content less than or equal to 5 percent and black appearance.
4. The method for producing high-end superphosphate by utilizing B1-layer phosphate ores as claimed in claim 1, wherein the drying temperature is 550-650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011375172.9A CN112321333A (en) | 2020-12-01 | 2020-12-01 | Method for producing high-end common calcium by using B1 layers of phosphate ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011375172.9A CN112321333A (en) | 2020-12-01 | 2020-12-01 | Method for producing high-end common calcium by using B1 layers of phosphate ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112321333A true CN112321333A (en) | 2021-02-05 |
Family
ID=74309468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011375172.9A Pending CN112321333A (en) | 2020-12-01 | 2020-12-01 | Method for producing high-end common calcium by using B1 layers of phosphate ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112321333A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223987A (en) * | 1998-12-22 | 1999-07-28 | 郑州工业大学磷肥与复肥研究所 | Preparation of particle superphosphate with ground phosphate rock by one-step process, and process therefor |
| CN104788131A (en) * | 2015-04-29 | 2015-07-22 | 铜陵化学工业集团有限公司 | Method for producing superphosphate by utilizing low-grade phosphate ore mixed acid process |
| 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 |
-
2020
- 2020-12-01 CN CN202011375172.9A patent/CN112321333A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223987A (en) * | 1998-12-22 | 1999-07-28 | 郑州工业大学磷肥与复肥研究所 | Preparation of particle superphosphate with ground phosphate rock by one-step process, and process therefor |
| CN104788131A (en) * | 2015-04-29 | 2015-07-22 | 铜陵化学工业集团有限公司 | Method for producing superphosphate by utilizing low-grade phosphate ore mixed acid process |
| 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 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |
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| RJ01 | Rejection of invention patent application after publication |