CN1368488A - Process for preparing durable-acting rare-earth phosphorus fertilizer - Google Patents
Process for preparing durable-acting rare-earth phosphorus fertilizer Download PDFInfo
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- CN1368488A CN1368488A CN 01107102 CN01107102A CN1368488A CN 1368488 A CN1368488 A CN 1368488A CN 01107102 CN01107102 CN 01107102 CN 01107102 A CN01107102 A CN 01107102A CN 1368488 A CN1368488 A CN 1368488A
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- fertilizer
- phosphorus
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Abstract
A durable-acting rare earth-phosphorus fertilizer is prepared from the calcium phosphate fertilizer containing water-soluble and-insoluble P2O5, and rare-earth trace element fertilizer of further adding a certain proportion of phosphogypsum through dry mixing. Its advantages are rich phosphorus for whole growth procedure of crops, high activity of rare earth, high utilization rate (increased by 40-50%), high effect on increasing yield and low cost.
Description
The invention belongs to the production method of rare-earth phosphate fertilizer, a kind of especially is main raw material or the production method that adds the durable-acting rare-earth phosphorus fertilizer that forms such as industrial by-products mixed preparing such as gypsum, phosphogypsums again with RE microbial fertilizer, water-soluble phosphoric acid calcium dihydrogen class and water-insoluble secondary calcium phosphate class fertilizer.
At present, in the kind of phosphate fertilizer, except that ammonium phosphate salt fertilizer, mostly be calcium phosphate salt fertilizer greatly, as: normal superphosphate, double superhosphate and fused(calcium magnesium)phosphate etc.The above two major ingredient is monocalcium phosphate [Ca (H
2PO
4) 2H
2O] and part free phosphoric acid (H
3PO
4), promptly acid phosphate fertilizer; This type of phosphate fertilizer is higher because of the free acid composition, the water-soluble rate height of its phosphorus, and arid is short of rain then can to cause crop root acid too high if meet in the fertilising back, and easy burn-out crop offspring causes crop failure; And excessive rainfall easily causes water-soluble phosphorus to run off with rainwater, and crop reduces the utilization ratio of phosphorus, and the phosphorus of loss enters water body will cause environmental pollution again; And its major ingredient of fused(calcium magnesium)phosphate is alpha---tricalcium phosphate [α-Ca
3(PO
4)
2], belong to alkaline phosphate fertilizer, be mainly used in acid soil, because of it does not contain water-soluble phosphorus, fertilizer efficiency is slow, can not satisfy the demand of crop different growing stages to phosphoric, and especially plant growth is in earlier stage.Utilization ratio in order to ensure phosphorus in normal superphosphate and the double superhosphate, that is fertilizer efficiency, the manufacturer that has adds a certain proportion of carbon ammonium in process of production with neutralization part free phosphoric acid, though this kind mode can overcome in the application to a certain extent or root acidity is too high, or water-soluble phosphorus is easily with disadvantages such as rainwater losses; Both increase production process but exist, improved the defective of production cost again.Also having the people to add proper amount of rare-earth in normal superphosphate, it is produced rare-earth phosphate fertilizer, is 98124029.3 disclosed this type of technology that is of patent documentation as application number; But because this technology is to add the RE microbial fertilizer raw material that forms through chemical process from rare-earth mineral (as monazite) in the normal superphosphate production process, therefore, in the reaction of sulfuric acid and phosphorus ore, a large amount of rare earths is created in the phosphate fertilizer with phosphatic form, become and be difficult to the rare-earth mineral material that absorbed by crop, be cerium group (La, Ce, Pr, Nd, Sm) phosphoric acid salt and yttrium group (Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Lu) phosphoric acid salt, that is through processing treatment, the rare-earth phosphate fertilizer of former adding is returned as the composition of solitary stone ore again, causes the activity of rare earth in phosphate fertilizer to reduce, disadvantages such as fertilizer efficiency weakens.
The objective of the invention is defective at the background technology existence, improve the production method of a kind of durable-acting rare-earth phosphorus fertilizer of design, after being used, it can satisfy plant growth early stage and intermediary and later stages demand to phosphorus, can guarantee the activity of the little fertilizer of fertilizer middle-weight rare earths again, all can balancedly supply with battalion's element phosphor and rare earth to the crop different growing stages, reach the utilization ratio that improves phosphorus and RE microbial fertilizer, improve crop yield, the production cost that reduces fertilizer and the planting cost of crop, reduce purposes such as environmental pollution.
Solution of the present invention is to adopt a certain proportion of water-soluble, water-insoluble phosphatic manure and RE microbial fertilizer mixed preparing to form.Wherein with Ca (H
2OP
4) H
2The water-soluble phosphorus that the O form exists because of its good water solubility, is fit to the supply of plant growth required phosphorus nutrition in early stage; And with CaPO
42H
2The water-insoluble phosphorus that the O form exists, because of its potential of hydrogen is neutral, the molten rate of its solubility in citric acid and Chinese holly is all much higher than alkaline fused(calcium magnesium)phosphate, then is fit to the supply of the required phosphorus nutrition of intermediary and later stages of plant growth; When secondary calcium phosphate content is greater than monocalcium phosphate in the fertilizer component, there is not free phosphoric acid (H in the fertilizer
2PO
4) exist, adopt dry mixed mode that RE microbial fertilizer is added wherein simultaneously again, make it not carry out chemical reaction, and keep the activity of rare earth with phosphate fertilizer.The present invention promptly realizes its goal of the invention with this.Therefore, the inventive method comprises:
A, at first by the desired total P of the long-acting rare-earth phosphate fertilizer of product to be produced
2O
5The content meter will contain total P
2O
5The water-soluble phosphoric acid calcareous fertilisers material of amount (by weight percentage) 30～45% contains total P
2O
5Amount 55～70% water-insoluble calcium phosphate fertilizer and contain the RE microbial fertilizer of rare earth composition of product population 0.03～0.08% weighing is stand-by respectively;
B, water-soluble phosphoric acid calcareous fertilisers material water-insoluble phosphorus phosphorus calcareous fertilisers material that above-mentioned weighing is stand-by and RE microbial fertilizer add successively mix in the agitator after.
For reaching, the production cost that reduces durable-acting rare-earth phosphorus fertilizer of the present invention effectively utilizes the phosphorous industrial residue of part, also can add gypsum, phosphogypsum class industrial by-products as additive in the component of durable-acting rare-earth phosphorus fertilizer, its addition is no more than 60% of product gross weight.
The present invention is owing to adopt a certain proportion of calcium phosphate fertilizer and RE microbial fertilizer that contains water-soluble phosphorus and water-insoluble phosphorus, also or again add class industrial by-products such as a certain proportion of phosphogypsum together dry mixed form, promptly contain the water-soluble phosphorus that plant growth desired nutritional in early stage can be provided in the product of the present invention thereby make, contain the water-insoluble phosphorus that can satisfy its growth intermediary and later stages desired nutritional again; Again because of there not being free phosphoric acid (H in the fertilizer composition
2PO
4) exist, the RE microbial fertilizer that is added just can not carried out chemical reaction with phosphate fertilizer.Thereby the activity that can effectively keep rare earth; In addition, owing to add the part industrial by-products, can effectively reduce production costs again.The present invention has in using and compares with background technology, can improve the utilization ratio 40～50% of phosphate fertilizer and rare-earth fertilizer, volume increase, increasing benefit is obvious, can effectively reduce the planting cost of crop, utilizes industrial residue, avoids characteristics such as environmental pollution and production technique are simple, reliable.
Embodiment 1
With one ton of total P
2O
5Content is 30%, wherein: water-insoluble P
2O
5: 18%, water-soluble P
2O
5: weighing is stand-by respectively for 12% calcium hydrophosphate fertilizer and monocalcium phosphate fertilizer;
It is stand-by that simultaneously weighing 3kg contains 20% RE microbial fertilizer;
Then that above-mentioned weighing is stand-by calcium phosphate fertilizer and RE microbial fertilizer add in the agitator successively successively, after mixing, packing.Water-soluble P in the present embodiment product
2O
5Content accounts for 40% of product total phosphorus content, water-insoluble P
2O
5Content accounts for 60%, and product middle-weight rare earths composition accounts for 0.06%.
Embodiment 2
With one ton of calcium phosphate fertilizer (total P
2O
5: 28%, water-soluble P
2O
5: 11%) contain the RE microbial fertilizer of 20% rare earth, one ton of phosphogypsum slag adds in the stirring mixer successively with 5kg, after mixing 2 tons of products, discharging packing.Total P in the present embodiment product
2O
5Content 14.2%, water-soluble P
2O
5Content 5.6% (promptly accounts for total P
2O
5Content 39.4%), content of rare earth 0.05%.
Embodiment 3
With one ton of calcium phosphate fertilizer (total P
2O
5: water-soluble P 24%,
2O
5: 7%) with 0.3 ton of normal superphosphate fertilizer (effective P
2O
5: water-soluble P 14%,
2O
5: 11.3%) and 0.7 ton of phosphogypsum, 6kg contain the RE microbial fertilizer of 20% rare earth, add in the agitator successively successively and mix, promptly get two tons of products.Total P in this product
2O
5Content is 14.26%, water-soluble P
2O
5Content 5.42% (promptly accounts for total P
2O
5Content 38%), content of rare earth is 0.06%.
Claims (2)
1, a kind of production method of durable-acting rare-earth phosphorus fertilizer; It is characterized in that this method comprises:
A, at first by the desired total P of the long-acting rare-earth phosphate fertilizer of product to be produced
2O
5The content meter will contain total P
2O
5The amount (by weight percentage) 30～45% water-soluble phosphoric acid calcareous fertilisers material, contain total P
2O
5Amount 55～70% water-insoluble calcium phosphate fertilizer and contain the RE microbial fertilizer of rare earth composition of product population 0.03～0.08% weighing is stand-by respectively;
B, the water-soluble phosphoric acid calcareous fertilisers material that above-mentioned weighing is stand-by, water-insoluble phosphorus phosphorus calcareous fertilisers material and RE microbial fertilizer add successively mix in the agitator after.
2, press the production method of the described durable-acting rare-earth phosphorus fertilizer of claim 1; It is characterized in that also can adding gypsum, phosphogypsum class industrial by-products as additive in the component of durable-acting rare-earth phosphorus fertilizer, its addition is no more than 60% of product gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107102 CN1368488A (en) | 2001-02-06 | 2001-02-06 | Process for preparing durable-acting rare-earth phosphorus fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107102 CN1368488A (en) | 2001-02-06 | 2001-02-06 | Process for preparing durable-acting rare-earth phosphorus fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1368488A true CN1368488A (en) | 2002-09-11 |
Family
ID=4656055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01107102 Pending CN1368488A (en) | 2001-02-06 | 2001-02-06 | Process for preparing durable-acting rare-earth phosphorus fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1368488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280559A (en) * | 2020-09-29 | 2021-01-29 | 南京格洛特环境工程股份有限公司 | Alkaline soil composite modifier and preparation method thereof |
-
2001
- 2001-02-06 CN CN 01107102 patent/CN1368488A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280559A (en) * | 2020-09-29 | 2021-01-29 | 南京格洛特环境工程股份有限公司 | Alkaline soil composite modifier and preparation method thereof |
| CN112280559B (en) * | 2020-09-29 | 2021-12-17 | 南京格洛特环境工程股份有限公司 | Alkaline soil composite modifier and preparation method thereof |
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