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Method for producing mineral raw organic fertilizers

A production method and technology of organic fertilizer, applied in the directions of organic fertilizer, inorganic fertilizer, nitrogen fertilizer, etc., can solve the problems of insufficient storage capacity of phosphogypsum slag field, strong sulfuric acid corrosion, affecting production and operation, etc., to promote soil microbial activity, leaching, etc. High rate and the effect of improving utilization

Inactive Publication Date: 2018-07-27
YUNNAN YUNTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are also many deficiencies in the production technology of existing phosphate compound fertilizers: 1. Need to add washing liquid, sulfuric acid, ammonia, phosphoric acid from pipe back, synthetic DAP and (NH 4 ) 2 SO 4 The mixed slurry, and then spray granulation
Due to the violent reaction between sulfuric acid and ammonia, the heat release is large, and the concentration of sulfuric acid is high, the reaction product will solidify immediately, causing the tube to be blocked or other accidents (such as the temperature is too high to burn the tube), so when feeding the tube, it must be Follow: the order of washing liquid—gas ammonia—phosphoric acid—sulfuric acid, and the order of stopping feed is: sulfuric acid—phosphoric acid—washing liquid—gas ammonia, the procedure is extremely cumbersome
2. Sulfuric acid is highly corrosive. In order to prevent leakage and injury, it is also required to wear an acid-proof mask when starting and stopping the sulfuric acid pump and during inspections.
3. The ammonium nitrate in the nitro compound fertilizer is added to the granulator in the form of granules, and the ammonium nitrate melts and sticks in the dryer, which affects the production operation
4. Phosphoric acid needs to be used, but phosphoric acid production will produce a large amount of phosphogypsum by-products, and currently it mainly relies on stacking for disposal
Even so, the current phosphate and compound fertilizer production enterprises generally have the problem of insufficient storage capacity of phosphogypsum slag yards

Method used

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  • Method for producing mineral raw organic fertilizers
  • Method for producing mineral raw organic fertilizers
  • Method for producing mineral raw organic fertilizers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 124 parts of sulfuric acid with a concentration of 92% to 95% and 165 parts of nitric acid with a concentration of 56% to 65% by weight, and mix to obtain mixed acid; 197 parts of phosphate rock powder were placed in mixed acid and decomposed under 4KPa negative pressure for 30 minutes; the decomposed material was added to the granulator, and 76 parts by weight of humic acid, 255 parts by weight of potassium sulfate, and 11 parts by weight of MgSO were added simultaneously. 4 ﹒ 7H 2 O magnesium sulfate heptahydrate, 19 parts by weight Na 2 B 4 o 7 ﹒ 10H 2 The decahydrate of sodium O tetraborate, 28 parts by weight ZnSO 4 ﹒ 7H 2 O Joint granulation of zinc sulfate heptahydrate; control the moisture content of the granulator output to 1%, that is, to obtain the required mineral organic fertilizer.

[0025] P in phosphate rock powder 2 o 5 The content is 25.3%-27.5%; the content of water-soluble humic acid in humic acid is 55%-63%. When granulating, the m...

Embodiment 2

[0027] Repeat Example 1, following difference is arranged: take by weighing 159 parts of sulfuric acid and 173 parts of nitric acid and make mixed acid; Phosphate rock is ground to cross 50 mesh sieves, then the phosphor rock powder of 203 weight parts is placed in mixed acid, at 4.5 Decompose under KPa negative pressure for 31 minutes; put the decomposed material into the granulator, and add 81 parts by weight of humic acid, 258 parts by weight of potassium sulfate, and 13 parts by weight of MgSO 4 ﹒ 7H 2 O magnesium sulfate heptahydrate, 20 parts by weight Na 2 B 4 o 7 ﹒ 10H 2 The decahydrate of sodium O tetraborate, 29 parts by weight ZnSO 4 ﹒ 7H 2 Co-granulation of zinc sulfate heptahydrate; control the moisture content of the granulator output to 1.7%, that is, to obtain the required mineral organic fertilizer.

[0028] During granulation, the material residence time is 2.2 minutes, the rotating speed is 9.3 rpm, and the driving motor P=100KW.

Embodiment 3

[0030] Repeat Example 1, following difference is arranged: take by weighing 162 parts of sulfuric acid and 177 parts of nitric acid to make mixed acid; Phosphate rock is ground to cross 60 mesh sieves, then the phosphor rock powder of 205 weight parts is placed in mixed acid, at 4.7 Decompose under KPa negative pressure for 32 minutes; put the decomposed material into the granulator, and add 83 parts by weight of humic acid, 308 parts by weight of potassium sulfate, and 14 parts by weight of MgSO 4 ﹒ 7H 2 O magnesium sulfate heptahydrate, 21 parts by weight Na 2 B 4 o 7 ﹒ 10H 2 The decahydrate of sodium O tetraborate, 30 parts by weight ZnSO 4 ﹒ 7H 2 Co-granulation of zinc sulfate heptahydrate; control the moisture content of the granulator output to 2.3%, that is, to obtain the required mineral organic fertilizer.

[0031] When granulating, the material residence time is 2.5 minutes, the rotating speed is 9.6 rpm, and the driving motor P=100KW.

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Abstract

The invention discloses a method for producing mineral raw organic fertilizers. The method has the advantages that sulfuric acid and nitric acid are uniformly mixed with each other and then are used for decomposing phosphorite powder, completely decomposed materials are conveyed into granulators, humic acid is added into the granulators, potassium sulfate and diversified trace elements are jointlygranulated, and the mineral raw organic fertilizers which are products can be obtained after the ultimate moisture content is controlled; processes for producing the mineral raw organic fertilizers are safe, simple and convenient, the phosphorite powder is decomposed by mixed acid, accordingly, the method is high in decomposition speed and extraction rate, elements and nutrients such as N and P2O5 can be generated, nitrate can be effectively utilized, and calcium nitrate with high value further can be generated; phosphorus gypsum can be prevented, and accordingly diversified problems due to extensive stacking of phosphorus gypsum can be effectively solved; effective nutrients in soil can be increased by the mineral raw organic fertilizers, the phosphorus effectuation can be promoted, theutilization rate of the mineral raw organic fertilizers can be increased, soil structures can be improved if the mineral raw organic fertilizers are applied, formation of soil aggregate structures canbe promoted, the fertilizer supply performance and the water and fertilizer retention performance of the soil can be improved, and the method has an excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of phosphate compound fertilizer production, and in particular relates to a production method of mineral organic fertilizer. Background technique [0002] Traditional phosphate compound fertilizer products are mainly composed of three elements: nitrogen, phosphorus and potassium, also known as incomplete fertilizers. Due to single nutrient, lack of organic matter and trace elements, and strong acid, alkali, and salinity, if used alone for a long time, it will be detrimental to plant growth, deteriorate the soil, and reduce soil fertility. At the same time, when applied, the nutrient release speed is fast but not long-lasting, and the hygroscopicity is strong during storage and transportation. The nutrients of chemical fertilizers are easily lost due to volatilization, leaching, fixation and other reasons, and the utilization rate of fertilizers is not high. [0003] Although there are also records of adding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05B17/00C05G3/80C05C5/04C05D1/02C05D5/00C05D9/02C05F11/02
Inventor 念吉红
Owner YUNNAN YUNTIANHUA
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