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Calcium-enriched compound fertilizer and preparation method thereof

A compound fertilizer and calcium-rich technology, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer, etc., can solve the problems of low calcium sulfate solubility, high concentration, and inability to realize the coexistence of acyl nitrogen

Inactive Publication Date: 2017-09-05
GUIZHOU BATIAN ECOTYPIC ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nitrogen exists in three states: acyl nitrogen, nitrate nitrogen, and ammonium nitrogen. Urea itself cannot be directly absorbed by plants. It needs to be decomposed into ammonium nitrogen by urease before crops can absorb it. This prolongs the release period of nitrogen. Can play a long-term effect; and the application of ammonium nitrogen and nitrate nitrogen can be directly absorbed by crops, which has a quick effect, but the concentration of ammonium nitrogen is high, espe

Method used

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  • Calcium-enriched compound fertilizer and preparation method thereof

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preparation example Construction

[0034] The preparation method of above-mentioned calcium-enriched compound fertilizer comprises the following steps:

[0035] Step S110, evaporating and concentrating the dilute urine to obtain urine.

[0036] Preferably, the mass concentration of dilute urine is 70%-80%, and the mass concentration of urine is 95%-99.75%.

[0037] Preferably, the temperature of the dilute urine is 80°C to 90°C.

[0038] It can be understood that the purpose of the urine is to provide urea. If solid urea is used in the subsequent steps, step S110 can be omitted, or if the raw material is urine with a mass concentration of 95% to 99.75%, no concentration is required. Steps can also be omitted.

[0039] Step S120, mixing urea with calcium source and potassium source to prepare slurry.

[0040] Urea may exist in the state of solid urea or in the state of urine. The mass concentration of urine is 95%-99.75%.

[0041] In one embodiment, the urea is mixed and melted with the calcium source and t...

Embodiment 1

[0051] The preparation method of the calcium-enriched compound fertilizer of embodiment 1 may further comprise the steps:

[0052]The dilute urine with a temperature of 80°C and a concentration of 80wt% from the urea workshop is pumped to the urea evaporation device on the prilling tower, and the urine is obtained through evaporation and concentration. The mass concentration of the urine is 99.75%; the urine enters The mixing tank of the pulping device on the tower is mixed with ammoniated calcium nitrate and potassium chloride solution in a weight ratio of 80:15:5; after mixing, it flows into the emulsifier of the pulping device on the tower and mixes evenly to obtain slurry; The slurry is passed into the granulator on the tower for granulation to obtain calcium-rich compound fertilizer with a particle size of 1 mm to 4 mm.

Embodiment 2

[0054] The preparation method of the calcium-enriched compound fertilizer of embodiment 2 may further comprise the steps:

[0055] The dilute urine with a temperature of 80°C and a concentration of 80wt% from the urea workshop is pumped to the urea evaporation device on the prilling tower, and the urine is obtained through evaporation and concentration. The mass concentration of the urine is 99.75%; the urine enters The mixing tank of the pulping device on the tower is mixed with ammoniated calcium nitrate and potassium chloride solution in a weight ratio of 15:75:10; after mixing, it flows into the emulsifier of the pulping device on the tower and mixes evenly to obtain slurry; The slurry is passed into the granulator on the tower for granulation to obtain calcium-rich compound fertilizer with a particle size of 1 mm to 4 mm.

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Abstract

The invention relates to calcium-enriched compound fertilizer and a preparation method thereof. The calcium-enriched compound fertilizer is characterized by being prepared from, by weight, 6-90 parts of urea, 7-90 parts of calcium source and 2-80 parts of potassium source, the calcium source is selected from at least one of calcium nitrate and ammonium calcium nitrate, and the potassium source is selected from at least one of potassium nitrate and potassium chloride. Acyl nitrogen, nitric nitrogen and ammonium nitrogen coexist in the calcium-enriched compound fertilizer, and the compound fertilizer is rich in water-soluble calcium, high in strength and good in dissolution performance.

Description

technical field [0001] The invention relates to a calcium-enriched compound fertilizer and a preparation method thereof. Background technique [0002] Crops and garden plants need to absorb more nutrients in a growth cycle. Fertilizers can provide the nutrients needed by crops, change the composition of the soil, improve the fertility of the soil, and increase the organic matter of the soil. Reasonable fertilization plays a decisive role in the growth and development of crops, the promotion of crop metabolism, and the increase of crop yield per unit area. [0003] The three elements nitrogen, calcium and potassium are essential elements for crop growth and development. Nitrogen exists in three states: acyl nitrogen, nitrate nitrogen, and ammonium nitrogen. Urea itself cannot be directly absorbed by plants. It needs to be decomposed into ammonium nitrogen by urease before crops can absorb it. This prolongs the release period of nitrogen. Can play a long-term effect; and th...

Claims

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Application Information

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IPC IPC(8): C05G1/00
CPCC05C5/02C05C5/04C05C9/00C05D1/02
Inventor 范素民冯军强任光耀姚耿彪吴嫒
Owner GUIZHOU BATIAN ECOTYPIC ENG CO LTD
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