Method and apparatus for producing high-strength grannular parti

Details Method and apparatus for producing high-strength grannular parti Method and apparatus for producing high-strength grannular parti

1988-03-31

1989-06-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Agitating to form larger particles

71 6402, 118303, 264 37, 425222, 427212, 427242, B29B 910, B05D 700, B05C 500

Patent

active

048427900

ABSTRACT:
The present invention teaches a technique and provides for apparatus eminently useful for producing closely sized, high-strength granular particulates from low-strength prills such as, for example, urea and ammoniu m nitrate which are nitrogen fertilizers, i.e., an essential plant nutrient. Advantages and benefits derived from the practice of the present invention relate to the production of closely sized high-strength particulates useful to the chemical fertilizer industry by virtue of their having favorable properties for custom fertilizer blending, direct applications, and as a substrate for sulfur coating to produce a controlled release fertilizer. Further advantages and benefits derived from the practice of the present invention relate to the utilization of low-cost surplus prills of low stren gth as feedstock in the production of the closely sized, high-strength granu lar particulates. Accordingly, the instant granulation process requires considerably less energy input than prior art granulation processes.

REFERENCES:
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patent: 4353852 (1982-10-01), Tse
patent: 4424176 (1984-01-01), Shirley, Jr. et al.
patent: 4478170 (1984-10-01), Bridges et al.
patent: 4506453 (1985-03-01), Shirley, Jr. et al.
patent: 4686115 (1987-08-01), Majer
patent: 4749349 (1988-06-01), Thuring et al.

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