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Melt slime granulating composite fertilizer and its production method

A technology of melt slurry and manufacturing method, applied in the directions of urea compound fertilizer, fertilizer form, fertilizer mixture, etc., can solve the problems of rapid decomposition and loss of fertilizer efficiency, unstable nutrient ratio, large energy consumption, etc., so as to improve the chemical fertilizer utilization rate, improve equipment utilization rate, and reduce the effect of decomposition loss

Active Publication Date: 2009-06-24
STANLEY AGRI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, various kinds of compound fertilizers (mixed fertilizers) used for crops have several problems. The fertilizers are easy to agglomerate when stored, the particles are not smooth, uneven, and the nutrient ratio is unstable, which is not conducive to balanced fertilization of farmland.
[0003] At the same time, because the compound fertilizer (mixed fertilizer) produced by the traditional granulation method is a simple physical sticking process, the structure is relatively loose, the fertilizer dissolves and releases quickly, the fertilizer decomposes and loses quickly, and the fertilizer utilization rate is low.
The traditional drying and screening process after granulation consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: 45 parts of urea, 25 parts of potassium chloride, 25 parts of monoammonium phosphate, 5 parts of filler (dolomite powder);

[0020] Step 1: Melt 45 parts of urea at a high temperature of 130°C, and pump it into the mixing tank at the top of the tower.

[0021] Step 2: After measuring 25 parts of potassium chloride, 25 parts of monoammonium phosphate and 5 parts of dolomite powder, put them into the mixer and mix well.

[0022] Step 3: After the mixed raw materials in step 2 are crushed and screened, they are sent to the tower top silo with a bucket elevator.

[0023] Step 4: Send the mixed material in the silo in step 3 to the mixing heater and heat it to 60°C after passing through the screw feeder.

[0024] Step 5: Send the heated mixed material in the above step 4 into the mixer described in the above step 1, and mix it into a viscous liquid material after rapid stirring. The temperature is controlled at 115°C, and then the overflow goes to the granulat...

Embodiment 2

[0026] Embodiment 2: 48 parts of urea, 24 parts of potassium chloride, 20 parts of diammonium phosphate, 2 parts of filler (talcum powder);

[0027] Step 1: Melt 48 parts of urea at a high temperature of 145°C and pump it into the mixing tank at the top of the tower.

[0028] Step 2: Put 24 parts of potassium chloride, 20 parts of diammonium phosphate, and 2 parts of talcum powder into the mixer and mix well after being measured.

[0029] Step 3: After the mixed raw materials in step 2 are crushed and screened, they are sent to the tower top silo with a bucket elevator.

[0030] Step 4: Send the mixed material in the silo in step 3 to the mixing heater and heat it to 95°C after passing through the screw feeder.

[0031] Step 5: Send the heated mixed material in the above step 4 into the mixer described in the above step 1, and mix it into a viscous liquid material after rapid stirring. The temperature is controlled at 120°C, and then the overflow goes to the granulation nozzl...

Embodiment 3

[0033] Embodiment 3: 50 parts of urea, 20 parts of potassium chloride, 30 parts of triammonium phosphate, 1 part of filler (clay);

[0034] Step 1: Melt 50 parts of urea at a high temperature of 135°C and pump it into the mixing tank at the top of the tower.

[0035] Step 2: After measuring 20 parts of potassium chloride, 30 parts of triammonium phosphate and 1 part of clay, put them into the mixer and mix well.

[0036] Step 3: After the mixed raw materials in step 2 are crushed and screened, they are sent to the tower top silo with a bucket elevator.

[0037] Step 4: Send the mixed material in the silo in step 3 to the mixing heater and heat it to 65°C after passing through the screw feeder.

[0038] Step 5: Send the heated mixed material in the above step 4 into the mixer described in the above step 1, and mix it into a viscous liquid material after rapid stirring. The temperature is controlled at 118°C, and then overflows to the granulation nozzle, Under the rotating cen...

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Abstract

A melt slurry tower granulation compound fertilizer and a manufacturing method thereof. A melt slurry tower granulation compound fertilizer is composed of the following components by weight ratio: urea: 45-50 parts; potassium chloride or Potassium sulfate: 20-25 parts; ammonium phosphate: 20-30 parts; filler: 1-5 parts. The invention discloses a method for manufacturing compound fertilizer with melted slurry tower granulation. In the manufacturing process, high-temperature molten urea is used as a carrier, the raw materials are evenly fused, and then sprayed and cooled at the top of the tower to form granules. The height of the tower is 60-120 meters, and the diameter of the tower is 8-20 meters. During the preparation process, no moisture is introduced into the system to bond and granulate, which can prevent agglomeration due to excess moisture. The advantages of the present invention are: the melt method compound fertilizer prepared by the present invention adopts high tower spraying natural cooling and one-time granulation molding technology in the preparation process. This technology does not have returning materials, so that the production capacity is greatly improved. It avoids the problems of low granulation rate and many returning materials due to the traditional method, saves energy and improves equipment utilization. At the same time, because there is almost no dust pollution from returned materials, the working environment is cleaner and the discharge of three wastes is avoided.

Description

technical field [0001] The invention relates to a melt slurry tower type granulated compound fertilizer and a manufacturing method thereof. It belongs to the field of agricultural fertilizers. Background technique [0002] At present, various compound fertilizers (mixed fertilizers) used for crops have several problems. The fertilizers are easy to agglomerate when stored, the particles are not smooth, uneven, and the nutrient ratio is unstable, which is not conducive to balanced fertilization of farmland. [0003] At the same time, the compound fertilizer (mixed fertilizer) produced by the traditional granulation method belongs to simple physical adhesion due to the granulation process, the structure is relatively loose, the fertilizer dissolves and releases quickly, the fertilizer efficiency decomposes and loses quickly, and the fertilizer utilization rate is low. The traditional drying and screening process after granulation consumes a lot of energy. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00C05G5/00C05C9/00C05D1/02C05B7/00
Inventor 高建华
Owner STANLEY AGRI GRP CO LTD
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