Apparatus for producing potassium silicate fertilizer

Details Apparatus for producing potassium silicate fertilizer Apparatus for producing potassium silicate fertilizer

1980-08-12

1981-10-06

Richman, Barry

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

71 62, 422142, 422145, B01J 600, B01J 826, B01J 824, F27B 1508

Patent

active

042935237

ABSTRACT:
A process for producing a citric acid soluble potassium silicate fertilizer comprises a step for kneading a mixture consisting essentially of potassium carbonate, fly ash, pulverized coal, other necessary starting materials and a caustic potash solution as a binder and then granulating the kneaded mixture, a step for drying the granulated product to a nearly absolutely dry state, and a step for calcining the dried granular product, whereby a chemical reaction takes place between the potassium and the silicon present in fly ash to convert them into a citric acid soluble potassium silicate. A process according to a second embodiment comprises a step for kneading a mixture consisting essentially of a potassium source, such as potash and/or potassium carbonate, fly ash, other components necessary for the production of citric acid soluble potassium silicate fertilizer and a binder, such as alcoholic waste liquor or the like, and then granulating the kneaded mixture, a step for drying the kneaded mixture to a nearly absolutely dry state, and a step for calcining the dried granular product, whereby a chemical reaction takes place between the potassium and the silicic acid present in fly ash to form a citric acid soluble potassium silicate. An apparatus for practicing the processes mentioned above comprises a plurality of continuous quantitative feeders, a continuous kneader, an extruder for forming granules, a fluid dryer, a fluid calcining furnace, and a cooling device for cooling calcined product.

REFERENCES:
patent: 1401648 (1921-12-01), Rossi
patent: 2352738 (1944-07-01), Ruthruff
patent: 2374035 (1945-04-01), Artting
patent: 2773018 (1956-12-01), Parry
patent: 2948948 (1960-08-01), Duplen et al.
patent: 3758305 (1973-09-01), Fisher
patent: 3843559 (1974-10-01), Repik et al.
patent: 3971631 (1976-07-01), Alinagro et al.
patent: 4178215 (1979-12-01), Kintani et al.

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