Abstract:
Nitro-phosphate (NP) is a complex acidic fertilizer which contains two
macronutrients of plants, nitrogen (N) and phosphorous (P). NP is majorly used
for rooting, blooming and fruit production of plants.
Demand of nitro-phosphate is increasing day by day with increasing demand for
food and population growth. Increasing demand of NP and alkalinity of soil in
Pakistan motivates us to work on this project.
Phosphate ore is an important raw material for manufacturing phosphorous
chemical products. While most of the phosphate resources cannot be directly
treated as feed stock due to the low grade of P2O5 and high content of silica and
other metal impurities. For obtaining a qualified phosphate concentrate, the
beneficiation of the low-grade phosphate ore is carried out to upgrade the P2O5
grade of phosphate ores from 20% to 28% using direct and reverse flotation
techniques. This treated feed is used to make a NP fertilizer using ODDA
Process.
This report includes material and energy balance, designing along with HAZOP
and EIA study. The designing of each equipment (reactors, crystallizer, heat
exchangers, centrifuges, evaporator and prilling tower) with designing is
discussed in detail. The cost estimation of this plant was a major and
compulsory part of this report. The plant capital cost and operating cost are also
determined along with payback period (2.25 years). The payback period of the
project is 2.25 years
