CN104445082B - Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag - Google Patents
Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag Download PDFInfo
- Publication number
- CN104445082B CN104445082B CN201410184084.9A CN201410184084A CN104445082B CN 104445082 B CN104445082 B CN 104445082B CN 201410184084 A CN201410184084 A CN 201410184084A CN 104445082 B CN104445082 B CN 104445082B
- Authority
- CN
- China
- Prior art keywords
- furnace slag
- yellow phosphorus
- phosphorus furnace
- double superhosphate
- free acid
- 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.)
- Expired - Fee Related
Links
- 239000002893 slag Substances 0.000 title claims abstract description 58
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000002253 acid Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 27
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 title abstract 6
- 239000002426 superphosphate Substances 0.000 title abstract 6
- 150000007513 acids Chemical class 0.000 title abstract 3
- 230000003472 neutralizing effect Effects 0.000 title abstract 2
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 230000005070 ripening Effects 0.000 claims description 23
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 claims description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 235000019691 monocalcium phosphate Nutrition 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 21
- 239000011574 phosphorus Substances 0.000 abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000011575 calcium Substances 0.000 abstract description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052791 calcium Inorganic materials 0.000 abstract description 3
- 239000000395 magnesium oxide Substances 0.000 abstract description 2
- 239000002686 phosphate fertilizer Substances 0.000 abstract description 2
- 235000014786 phosphorus Nutrition 0.000 description 20
- 239000000047 product Substances 0.000 description 17
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 14
- 238000004458 analytical method Methods 0.000 description 11
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 description 9
- 229910019142 PO4 Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- PGYDGBCATBINCB-UHFFFAOYSA-N 4-diethoxyphosphoryl-n,n-dimethylaniline Chemical compound CCOP(=O)(OCC)C1=CC=C(N(C)C)C=C1 PGYDGBCATBINCB-UHFFFAOYSA-N 0.000 description 1
- -1 Acetylenogen. Chemical compound 0.000 description 1
- 239000006009 Calcium phosphide Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical group [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/055—Peroxyhydrates; Peroxyacids or salts thereof
- C01B15/16—Peroxyhydrates; Peroxyacids or salts thereof containing phosphorus
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag, which comprises the following steps: (1) yellow phosphorus furnace slag pretreatment: adding additives into yellow phosphorus furnace slag to regulate the pH value to 8-11, and grinding into powder of which 80% can pass through a 200-mesh screen; (2) slaking of double superphosphate: slaking double superphosphate for 13-18 days; and (3) neutralization reaction: mixing the yellow phosphorus furnace slag powder with the slaked double superphosphate to react while controlling the pH value of the mixture at 2-5. By using the yellow phosphorus furnace slag as the neutralizer, the cost is about200 yuan/ton, thereby greatly lowering the production cost as compared with the method using the calcium magnesia phosphate fertilizer. The neutralized double superphosphate comprises at least 46% of total phosphorus, at most 5% of free acids, at least 39% of water-soluble phosphorus and at most 4% of water.
Description
Technical field
The present invention relates to chemical field, especially relate in a kind of utilization yellow phosphorus furnace slag and free acid in double superhosphate
Method.
Background technology
Double superhosphate is the single phosphate fertilizer product of a kind of concentration highest being obtained using acid decomposed by phosphoric acid ground phosphate rock, due to phosphorus
The decomposition reaction of breeze is slower, leads to the free acid containing 12-18% from formation chamber fresh double superhosphate out, warp
After ripening about two weeks, the content of free acid still has 6-10%.Now, double superhosphate adhesiveness is larger, corrosivity are strong, not only right
Packaging, transport, storage work bring a lot of troubles, and it can reduce the germination percentage of seed with seed mix sowing.Therefore, state
In mark, regulation double superhosphate dispatches from the factory the product of sale, and its free acid content should be less than 5%.The double superhosphate just produced
Product generally requires to neutralize free acid therein using nertralizer.
In double superhosphate, the neutralization method of free acid can adopt ammoniation process and dry method neutralisation, and dry method neutralisation is with alkali
Property flour be nertralizer, including carbonate nertralizer, phosphate nertralizer, calcium magnesium phosphate nertralizer etc..And it is easy from raw material
From the point of view of and must guaranteeing product quality, Guiyang Zhonghua Kailin Fertilizer Co., Ltd.'s life-time service calcium magnesium phosphate is as mistake phosphorus again
The nertralizer of sour calcium, the main component of calcium magnesium phosphate is tricalcium phosphate, effective P2O5Higher than 15%, water content is less than 0.5%, leads to
The particle crossing 100 mesh is higher than 80%, and basicity is 1.13, and it with the free phosphoric acid reaction mechanism in double superhosphate is：Ca3
(PO4)2+4H3PO4+3H2O=3Ca (H2PO4)2*H2O, neutralizes the effect of free acid in double superhosphate relatively using calcium magnesium phosphate
Good, effectively the content of free acid can be reduced to less than 5%, but, calcium magnesium phosphate energy consumption is high, selling price height, arrives
About 850 yuan/ton of price at factory lattice.Calcium magnesium phosphate directly as finished product chemical fertilizer application, and can not limited by highly concentrated fertilizer outlet policy,
Thus market fluctuation is larger, when have phenomenon in short supply.
Content of the invention
In view of this, it is an object of the invention to provide in a kind of utilization yellow phosphorus furnace slag and double superhosphate in free acid side
Method, during overcoming by the use of calcium magnesium phosphate as nertralizer, cost of material is higher, and phenomenon in short supply often and lead to the band that stops production
The deficiency come.
The present invention employs the following technical solutions solution above-mentioned technical problem：
A kind of method with free acid in double superhosphate in utilization yellow phosphorus furnace slag, including following process step:
(1) yellow phosphorus furnace slag pretreatment：In yellow phosphorus furnace slag add additive, its pH value is adjusted to after 8-11, then by its
Grinding is 80% powder passing through 200 mesh sieves；
(2) ripening of double superhosphate：By double superhosphate ripening 13-18 days, the content of its free acid was 6-10%；
(3) neutralization reaction：The powder of yellow phosphorus furnace slag is pressed 4.5-5 with the double superhosphate after ripening：100 mass ratio
Hybrid reaction, the pH value controlling mixture is 2-5.
Described additive is pulverized limestone.
Preferably, after adding additive in yellow phosphorus furnace slag, adjusting its pH value is 9-10.
Preferably, the curing time of double superhosphate is 14-16 days.
Preferably, in described step (3), the mass ratio of the double superhosphate after the powder of yellow phosphorus furnace slag and ripening is
4.8：100.
Preferably, in described step (3), the pH value controlling mixture is 3-4.8.
The invention mainly relates to chemical equation be：CaO+H2O+2H3PO4=Ca (H2PO4)2*2H2O.
The beneficial effects of the present invention is：
1. use yellow phosphorus furnace slag as nertralizer, about 200 yuan/ton of its cost, for comparing using calcium magnesium phosphate, substantially reduce
Production cost.
2. the present invention is simple to operate, with short production cycle, suitable large-scale production.
3. in the present invention and after double superhosphate, the content of its each component is：Total phosphorus >=46%, free acid≤5%, water
Soluble phosphorus >=39%, moisture≤4%, reach primes product quality of dispatching from the factory and require.
With reference to test, beneficial effects of the present invention are described further：
Take double superhosphate bulk material after ripening for the 1000g, the ratio according to following three groups of nertralizers carries out dispensing,
Material places 24h, then sample analysis after being sufficiently mixed.Analysis result is as follows：
From the point of view of above experiment analysis results, as nertralizer, after hybrid reaction 24h, products obtained therefrom is total for calcium magnesium phosphate
The content of phosphorus, available phosphoruss and water-soluble phosphorus will be higher as the analysis result of nertralizer than using Yellow phosphorus furnace ground-slag, but difference is simultaneously
Inconspicuous, pilot production can be enlarged further.
The double superhosphate of free acid content 6% 10% after Yellow phosphorus furnace ground-slag and ripening, its total phosphorus content is more than 43%,
Mass ratio according to Yellow phosphorus furnace ground-slag and double superhosphate is 4.5-5:100 ratio carries out dispensing, places 24 after being sufficiently mixed
Hour, then this material is delivered to granulating system and obtains product after pelletize, drying, screening, cooling, follow the tracks of the examination life of four days
Product situation, analysis result is as follows：
The trial production situation of above four days shows, every analysis indexes all reach primes product quality of dispatching from the factory and require, that is,
Total phosphorus >=44%, free acid≤5%, water-soluble phosphorus >=39%, moisture≤4%.
Specific embodiment
Those skilled in the art understands, the present invention will be further described below in conjunction with embodiment for convenience.
Embodiment is only the illustration to this invention, is not limitation of the invention, does not make the step illustrating in embodiment
It is all prior art, here is not described in detail.
Yellow phosphorus furnace slag of the present invention is a kind of basic slag that electric furnace produces by-product during yellow phosphorus, after cooling of furnace slag
Present canescence, Dark grey, brown and black with composition difference.Slag forms the composition change depending mainly on raw material, strictly
The liquid of remainder after in fact all furnace charges are reduced by high temeperature chemistry, the chemical substance of solid phase are all the constituent of yellow phosphorus furnace slag,
Certainly only a small amount of ferrophosphorus remains in slag, and most ferrophosphorus are separated when coming out of the stove.The alkali metal oxidation of composition yellow phosphorus furnace slag
Thing has:Calcium oxide, magnesium oxide, potassium oxide etc.；Acidic oxide has：Silicon dioxide, aluminium sesquioxide, phosphorus pentoxide, in addition
Also have a small amount of calcium sulfide, Acetylenogen., calcium phosphide and iron sesquioxide etc., yellow phosphorus furnace slag quantity is big, but is substantially free of Toxic
Matter, its chemical composition is mainly calcium oxide, silicon dioxide, aluminium oxide, ferrum oxide and a small amount of phosphorus pentoxide.
Embodiment one
Method with free acid in double superhosphate, effective ingredient in described yellow phosphorus furnace slag in a kind of utilization yellow phosphorus furnace slag
CaO (content about 48%) and citric acid-soluble P2O5(content about 2.5%), water content is less than 0.5%.Free in described double superhosphate
Acid content is 12-18%.The process step of the present invention is：(1) yellow phosphorus furnace slag pretreatment：Take 45kg yellow phosphorus furnace slag, wherein plus
Enter pulverized limestone, after its pH value is adjusted to 8, then its grinding is 80% powder passing through 200 mesh sieves；(2) double superhosphate
Ripening：Take 1000kg double superhosphate, by its ripening 13 days, its free acid content was 9.55%；(3) neutralization reaction：Will be through
The powder crossing yellow phosphorus furnace slag after step (1) is processed is mixed instead at normal temperatures with the double superhosphate after step (2) ripening
Answer 20h, the pH value controlling mixture is 2.
Through analysis, in this double superhosphate product, total phosphorus content is 46.45%, and free acid content is 4.92%, water-soluble phosphorus
Content is 39.11%, and moisture is 1.76%.
Embodiment two
Method with free acid in double superhosphate, effective ingredient in described yellow phosphorus furnace slag in a kind of utilization yellow phosphorus furnace slag
CaO (content about 48%) and citric acid-soluble P2O5(content about 2.5%), water content is less than 0.5%.Free in described double superhosphate
Acid content is 12-18%.The process step of the present invention is：(1) yellow phosphorus furnace slag pretreatment：Take 50kg yellow phosphorus furnace slag, wherein plus
Enter pulverized limestone, after its pH value is adjusted to 11, then its grinding is 80% powder passing through 200 mesh sieves；(2) double superhosphate
Ripening：Take 1000kg double superhosphate, by its ripening 18 days, its free acid content was 6.32%；(3) neutralization reaction：Will be through
The powder crossing yellow phosphorus furnace slag after step (1) is processed is mixed instead at normal temperatures with the double superhosphate after step (2) ripening
Answer 48h, the pH value controlling mixture is 5.
Through analysis, in this double superhosphate product, total phosphorus content is 46.32%, and free acid content is 4.13%, water-soluble phosphorus
Content is 39.33%, and moisture is 1.83%.
Embodiment three
Method with free acid in double superhosphate, effective ingredient in described yellow phosphorus furnace slag in a kind of utilization yellow phosphorus furnace slag
CaO (content about 48%) and citric acid-soluble P2O5(content about 2.5%), water content is less than 0.5%.Free in described double superhosphate
Acid content is 12-18%.The process step of the present invention is：(1) yellow phosphorus furnace slag pretreatment：Take 48kg yellow phosphorus furnace slag, wherein plus
Enter pulverized limestone, after its pH value is adjusted to 9, then its grinding is 80% powder passing through 200 mesh sieves；(2) double superhosphate
Ripening：Take 1000kg double superhosphate, by its ripening 14 days, its free acid content was 8.23%；(3) neutralization reaction：Will be through
The powder crossing yellow phosphorus furnace slag after step (1) is processed is mixed instead at normal temperatures with the double superhosphate after step (2) ripening
Answer 24h, the pH value controlling mixture is 3.
Through analysis, in this double superhosphate product, total phosphorus content is 46.31%, and free acid content is 4.56%, water-soluble phosphorus
Content is 39.43%, and moisture is 1.69%.
Example IV
Method with free acid in double superhosphate, effective ingredient in described yellow phosphorus furnace slag in a kind of utilization yellow phosphorus furnace slag
CaO (content about 48%) and citric acid-soluble P2O5(content about 2.5%), water content is less than 0.5%.Free in described double superhosphate
Acid content is 12-18%.The process step of the present invention is：(1) yellow phosphorus furnace slag pretreatment：Take 46kg yellow phosphorus furnace slag, wherein plus
Enter pulverized limestone, after its pH value is adjusted to 10, then its grinding is 80% powder passing through 200 mesh sieves；(2) double superhosphate
Ripening：Take 1000kg double superhosphate, by its ripening 16 days, its free acid content was 8.79%；(3) neutralization reaction：Will be through
The powder crossing yellow phosphorus furnace slag after step (1) is processed is mixed instead at normal temperatures with the double superhosphate after step (2) ripening
Answer 36h, the pH value controlling mixture is 4.8.
Through analysis, in this double superhosphate product, total phosphorus content is 46.78%, and free acid content is 4.75%, water-soluble phosphorus
Content is 39.68%, and moisture is 1.86%.
In actual production, the free acid content of general control final grain calcium product is 4-5%, free acid can not by
Too low with obtaining, otherwise can make water miscible Ca (H2PO4)2Dissolving changes into citric soluble CaHPO4*2H2O or CaHPO4Crystallization analysis
Go out, cause water solublity P2O5Content declines, and the referred to as degeneration of calcium salt reduces fertilizer efficiency.In the product that the present invention produces, total phosphorus
Content is higher than 46%, and free acid content is 4-5%, and water-soluble phosphorus content is higher than 39%, and moisture is less than 2%, is fully achieved《Weight
Calcium superphosphate product quality specifications》The Grade A prescription of regulation.
Claims (6)
1. in a kind of utilization yellow phosphorus furnace slag and double superhosphate in free acid method it is characterised in that：Process step including following
Suddenly:
(1) yellow phosphorus furnace slag pretreatment：Add additive in yellow phosphorus furnace slag, its pH value is adjusted to after 8-11, then by its grinding
For 80% powder passing through 200 mesh sieves；
(2) ripening of double superhosphate：By double superhosphate ripening 13-18 days, the content of its free acid was 6-10%；
(3) neutralization reaction：The powder of yellow phosphorus furnace slag is pressed 4.5-5 with the double superhosphate after ripening：100 mass ratio mixing
Reaction, the response time is 20-48h, and the pH value controlling mixture in course of reaction is 2-5.
2. in use yellow phosphorus furnace slag as claimed in claim 1 and double superhosphate in free acid method it is characterised in that：Described
Additive is pulverized limestone.
3. in utilization yellow phosphorus furnace slag as claimed in claim 1 and double superhosphate in free acid method it is characterised in that：?
After adding additive in yellow phosphorus furnace slag, adjusting its pH value is 9-10.
4. in utilization yellow phosphorus furnace slag as claimed in claim 1 and double superhosphate in free acid method it is characterised in that：Weight
The curing time of calcium superphosphate is 14-16 days.
5. in utilization yellow phosphorus furnace slag as claimed in claim 1 and double superhosphate in free acid method it is characterised in that：Institute
State in step (3), the mass ratio of the double superhosphate after the powder of yellow phosphorus furnace slag and ripening is 4.8：100.
6. in utilization yellow phosphorus furnace slag as claimed in claim 1 and double superhosphate in free acid method it is characterised in that：Institute
State in step (3), the pH value controlling mixture is 3-4.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184084.9A CN104445082B (en) | 2014-05-04 | 2014-05-04 | Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184084.9A CN104445082B (en) | 2014-05-04 | 2014-05-04 | Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104445082A CN104445082A (en) | 2015-03-25 |
| CN104445082B true CN104445082B (en) | 2017-02-08 |
Family
ID=52891948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410184084.9A Expired - Fee Related CN104445082B (en) | 2014-05-04 | 2014-05-04 | Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104445082B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418167A (en) * | 2015-11-19 | 2016-03-23 | 昆明川金诺化工股份有限公司 | Method of reducing triple superphosphate free acid with fertilizer grade calcium hydrophosphate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB886951A (en) * | 1959-03-06 | 1962-01-10 | Hokkaido Tanko Kisen Kabushiki | Phosphate fertilizer composition and the method of manufacture thereof |
| CN102199055A (en) * | 2010-03-25 | 2011-09-28 | 冯涛 | Compound fertilizer |
-
2014
- 2014-05-04 CN CN201410184084.9A patent/CN104445082B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104445082A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180148384A1 (en) | Sulphur-based fertilizer composition with low rock phosphate content | |
| US9764993B2 (en) | Phosphate fertilizers and methods of making and using the same | |
| CN103771998A (en) | Fertilizer composition containing sulfur and boron | |
| CN103483039B (en) | Method for producing secondary element mineral fertilizer by activating wollastonite | |
| CN103483062A (en) | Method for producing secondary element fertilizer from micro silicon powder | |
| CN113277885A (en) | Resource utilization method of phosphoric acid residues | |
| EP3016920B1 (en) | Process for preparing a fertiliser | |
| CN104445082B (en) | Method for neutralizing free acids in double superphosphate by using yellow phosphorus furnace slag | |
| CN103771911A (en) | Method for producing medium element acid soil conditioner by utilizing waste industrial calcium silicate board | |
| CN116640028A (en) | Silicon-based slow-release potash fertilizer and manufacturing method thereof | |
| CN102795910B (en) | Blended fertilizer based on steel production waste and preparation method thereof | |
| CN104003823B (en) | A kind of method utilizing low-grade phosphate ore to produce nutrient type acid soil amendment | |
| CN103771966A (en) | Method for producing secondary element fertilizer from silica fume | |
| CN108473380A (en) | NPK fertilizer containing phosphorus potassium nitrogen and the method for being used to prepare the granulated NPK fertilizer containing phosphorus potassium nitrogen | |
| CN106187327A (en) | Mid low grade phosphate rock prepares method and the compound fertilizer product of high contents of calcium and magnesium compound fertilizer | |
| CN102153373B (en) | Process for producing calcium superphosphate | |
| CN104130043A (en) | Method for modifying granular superphosphate surface coating layer | |
| CA3116779A1 (en) | Manufacture of fertiliser | |
| US1163130A (en) | Process of manufacturing fertilizers. | |
| CN108910838A (en) | A kind of technique of potassium feldspar and ardealite recycling aluminium by-product Fertilizer special for eggplant | |
| EP3647300A1 (en) | Potassium sulfate containing trace elements | |
| CN103304301B (en) | Production method of controlled-release phosphorus potassium fertilizer | |
| CN102408261A (en) | Ammonium sulfate phosphate compound fertilizer able to decompose phosphor and potassium in soil | |
| CN103980008A (en) | Method for enhancing appearance quality of ordinary superphosphate | |
| US1042588A (en) | Fertilizer and process of making same. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160926 Address after: No. 237 Jinyang City Kailin Lake District Road 550009 Guizhou city of Guiyang Province Applicant after: Phosphorylcholine group limited-liability company is opened in Guizhou Address before: Xifeng County in Guizhou Province, Guiyang city town 551109 Applicant before: Zhonghuakai Phosphorous Chemical Fertilizer Co., Ltd., Guiyang |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170208 Termination date: 20210504 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |