Application of the FLSmidth Deep Cone Technology to the Fertilizer Plants in OCP

Serbon, Jean Claude; MacNamara, Liam; Schoenbrunn, Fred

doi:10.1016/j.proeng.2016.02.090

Cited by 6 publications

(1 citation statement)

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“…e main factor of failure of DCT is high partial concentration, leading to exceeding torsional moment of equipment in the thickener. If the thickener slurry can be homogeneous and fluidized, it will avoid the formation of filter cake at the bottom of the equipment [31]. e above research provides a variety of guidance for the development of tailings thickening, so that tailings with different grading and quality standards can get better underflow concentration through certain technical means.…”

Section: Introductionmentioning

confidence: 96%

Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill

Jin

Zhang

2020

Advances in Materials Science and Engineering

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Cemented paste backfill (CPB) can effectively eliminate the risk of dam break in goaf and tailings pond which used tailings waste. Deep cone thickener (DCT) is an efficient machine for the system of paste preparation, and the concentration of slurry at the bottom is high and distributed unevenly, which will cause too much partial resistance and failure of thickener. Focusing on the above problems, fluidization design was conducted by using the fluidization theory. The delivery law of flocs was analyzed, and the isobaric surface was obtained. The equation of pressure and critical velocity of the ideal fluidized bed was acquired by analyzing the relationship between pressure and critical velocity. Based on the characteristics of tailings and distribution of the bonding zone, the arrangement, number, and working mode of spray nozzles were reformed. It is verified that the failure time of thickener decreased from 14 hours to 1 hour and the range of concentration increased from 74%∼78% to 78%∼80%, which improved the stability and reliability of DCT. The depth thickening mechanism is obtained, and the thickening method has been improved which provides a theoretical basis for the effective preparation of paste.

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Section: Introductionmentioning

confidence: 96%