A method for producing granular compound fertilizer by squeezing and rubbing
A compound fertilizer and granule technology, which is applied to inorganic fertilizers, ammonium salt fertilizers, urea compound fertilizers, etc., can solve the problems of high replacement frequency of extrusion equipment, restrictions on popularization and application, and large one-time investment, achieving one-time investment and The effects of reduced floor space, improved operating environment, and reduced production energy consumption
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Embodiment 1
[0044] refer to figure 1 As shown in the process flow of the preparation method of the compound fertilizer in this embodiment, the method in this embodiment is to mix and humidify the basic fertilizer and filling material after batching to make a material with high moisture content and enhanced plasticity, and pass through the extrusion equipment Obtain a cylindrical material strip with a diameter of about 3.5mm, and then obtain spherical particles with a diameter of about 4.5mm through extrusion and granulation equipment. The moisture content of the material after granulation is 3% to 8%, and then the granular material is dried and cooled. Granular compound fertilizer products.
[0045] The raw material composition of entering device is as follows:
[0046] serial number
Types of basic fertilizers and fillers
Raw material addition per ton of product (kg)
1
Urea (N: 46%)
100
2
282
3
Monoammonium P...
Embodiment 2
[0055] The preparation method of the compound fertilizer refers to Example 1, but the composition of the raw materials used and the extrusion and granulation equipment are changed.
[0056] The composition of raw materials into the system is as follows:
[0057] serial number
Types of basic fertilizers and fillers
Raw material addition per ton of product (kg)
1
Urea (N: 46%)
384
2
Monoammonium Phosphate (N: 11%P 2 o 5 : 44%)
230
3
Potassium Chloride (K 2 O>60%)
168
4
242
[0058] Product specification: N-P 2 o 5 -K 2 O=20-10-10
[0059] Extrusion equipment used: screw, extrusion hole diameter 3.5mm
[0060] use Figure 4 The extrusion granulation equipment shown, the granulation aperture is 4.5mm
[0061] The moisture content of the material entering the extruder: ~4%, using a twin-shaft mixer to mix and humidify
[0062] Material temperature into the extruder: room temperature
...
Embodiment 3
[0066] The preparation method of the compound fertilizer refers to Example 1, but the composition of the raw materials used and the extrusion and granulation equipment are changed.
[0067] The composition of raw materials into the system is as follows:
[0068] serial number
Types of basic fertilizers and fillers
Raw material addition per ton of product (kg)
1
Phosphorous ammonium nitrate (N: 32%P 2 o 5 : 4%)
242
2
Diammonium Phosphate (N: 18%P 2 o 5 : 46%)
242
3
485
4
Attapulgite
45
[0069] Product specification: N-P 2 o 5 -K 2 O=12-12-24
[0070] Extrusion equipment used: First, the rollers are extruded into a sheet with a thickness of 3.5mm, and then cut into strips of 3.5mm×3.5mm in thickness, and the strips fall directly into the feed port of the extrusion granulator
[0071] use figure 2 Extrusion and granulation equipment shown, granulation aperture:...
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