The Improvement of TSP Fertilizer Production & Quality

Abstract

Results obtained showed that some essential manufacturing factors needs to be respected throughout the production loop. These factors will help obtaining a slurry exits with the desired chemical characteristics of P 2 O 5SE (33%), Al (10%), P 2 O 5SE + Citrate (34.5%), H 2 O (22%), P 2 O 5total (39%)). It is necessary to keep a temperature within 100 ± 5 ° C., with a vapor pressure of 6 to 7 bars, an average density of H 3 PO 4 (1470 g/l) and the solid rate in the feed acid less than 2%. After the reaction phase, the slurry is conveyed to the granulator where it is mixed with the recycled product at a recycling rate (RT) close to 3 and a K ratio between 0.1 and 0.2. This parameter is very important to be monitored to ensure a Good penetration of heat into the next phase in a relatively short time. During the drying process, the product humidity at the outlet must be in the range of 3.5% to 5% to allow the reaction to continue during the developing period. At the exit of the drying tube, the product is in very variable grains diameter (D), the objective of the following step is to extract the grain size range between 2 and 4 mm. To do so we changed the mesh size of the lower webs to 3/50 and 3.2 / 30 mm, which reduces the quantity of particle size less than 2%. Thus, the particles of diameter more than 3.15 mm must be continuously controlled to reach 64%. This portion will ensure conformity of the product for D 50 and for the two intervals [2-3.15 mm] and [3.15-4 mm]. In the Storage Hall the reaction continues, the unconverted phosphate will be attacked by the unreacted H 3 PO 4 , and according to a monitoring of the evolution of the chemical composition of the final product (TSP). The required ripening time is limited to 21 days. During this study, we were able to identify and modify a number of parameters in different production phases to improve the quality of TSP according to AFCOME, knowing that each phase of the process is a client of the previous phase and supplier of the next one.

The use of experimental design methodology in the formulation of a new additive for the dispersion of elemental sulfur in triple superphosphate fertilizer

“…Triple superphosphate fertilizer (TSP) is generally prepared by the attack of phosphoric acid (42% of P2O5) on phosphate rock [42][43][44] . However, we focus in this study to manufacture the phosphate fertilizer enriched with elemental sulfur (TSP-S).…”

Calcium Hydroxide Washing Treatment of Jordanian Phosphogypsum for Utilization as Raw Material in Cement Industry

“…Phosphogypsum is considered as an asset rather than as a waste, but its content of impurities hinders its use efficiently. The P2O5 impurities are harmfully affect the hydration of cement at its early stages [12].…”