UST912014I4 - UST912014I4 - Google Patents
UST912014I4Info
- Publication number
- UST912014I4 UST912014I4 US912014DH UST912014I4 US T912014 I4 UST912014 I4 US T912014I4 US 912014D H US912014D H US 912014DH US T912014 I4 UST912014 I4 US T912014I4
- Authority
- US
- United States
- Prior art keywords
- particles
- coating material
- coating
- rotary drum
- orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 abstract 6
- 239000011248 coating agent Substances 0.000 abstract 5
- 238000000576 coating method Methods 0.000 abstract 5
- 239000000463 material Substances 0.000 abstract 5
- 238000000034 method Methods 0.000 abstract 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 3
- 229910052717 sulfur Inorganic materials 0.000 abstract 3
- 239000011593 sulfur Substances 0.000 abstract 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 2
- 239000004202 carbamide Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 239000007921 spray Substances 0.000 abstract 2
- 239000000758 substrate Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 229940124561 microbicide Drugs 0.000 abstract 1
- 239000000618 nitrogen fertilizer Substances 0.000 abstract 1
- 239000004014 plasticizer Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fertilizers (AREA)
- Nozzles (AREA)
- Glanulating (AREA)
Abstract
A PROCESS FOR APPLYING A PRECISELY UNIFORM SOLID COATING OF FLUID MATERIAL ONTO SOLID SUBSTRATE PARTICLES WHEREIN SAID PARTICLES ARE PREHEATED IN A ROTARY DRUM HAVING A RADIANT HEAT SOURCE SUCH THAT THE SURFACE IRREGULARITIES OF SAID PARTICLES ARE SMOOTHED OUT BY A COMBINATION OF SURFACE MELTING AND TUMBLING ACTION. THE PREHEAT PARTICLES ARE FED TO A SECOND ROTARY DRUM WHERE MULTIPLE, THIN, CONCENTRICALLY FORMED LAYERS OF THE COATING MATERIAL ARE APPLIED BY CASCADING THE SUBSTRATE PARTICLES BENEATH A PLURALITY OF SEQUENTIALLY APPLIED, CLOSELY CONTROLLED SPRAYS OF THE COATING MATERIAL. IN PARTICULAR, THE PROCESS ALLOWS THE COATING OF GRANULAR UREA WITH MOLTEN SULFUR APPLIED UNDER PRECISE SPRAYING TEMPERATURES AND CONDITIONS IN SUCH A MANNER THAT THE MOLTEN SULFUR EVENLY COATS THE PARTICLES AND SOLIDIFIERS WITH THE DESIRED PHYSICAL CHARACTERISTICS TO FORM A SLOW RELEASE NITROGEN FERTILIZER AT AN ECONOMICAL COST WITHOUT THE USE OF SUBCOATS, SEAL COATS, MICROBICIDES, PARTING AGENTS, OR PLASTICIZERS. FURTHER, IT IS SHOWN BY EXAMPLES THAT THE OPERATIONAL CONDITIONS AND TECHNIQUES PRESENTED HEREIN CONSTITUTE A SUBSTANTIAL IMPROVEMENT IN THE PROCESS FOR THE PRODUCTION OF SULFURCOATED UREA WHERE ADDITIONAL COATINGS CONSISTING OF MATERIALS OTHER THAN SULFUR ARE USED. A UNIQUE SPRAY HEADER FOR PNEUMATIC ATOMIZING SPRAY NOZZLES IS DESCRIBED WHICH INCLUDES THE INSTALLATION OF AN ORIFICE IMMEDIATELY EXTERNAL TO EACH NOZZLE. THE FLOW RATE OF LIQUID IS PROPORTIONAL TO EACH NOZZLE BASED ON THE AREA OF THE OPENING IN EACH ORIFICE. THE COATED PRODUCT IS RAPIDLY COOLED TO CONTROL CRYSTAL STRUCTURE OF THE APPLIED COATING MATERIAL.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26852072A | 1972-07-03 | 1972-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST912014I4 true UST912014I4 (en) | 1973-07-24 |
Family
ID=23023376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US912014D Pending UST912014I4 (en) | 1972-07-03 | 1972-07-03 | UST912014I4 |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST912014I4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857098A (en) | 1987-08-11 | 1989-08-15 | Pursell Industries | Sulfur-coated fertilizer granules and process of making same |
-
1972
- 1972-07-03 US US912014D patent/UST912014I4/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857098A (en) | 1987-08-11 | 1989-08-15 | Pursell Industries | Sulfur-coated fertilizer granules and process of making same |
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