CREATION OF MINIPLANTS FOR ACIDS AND MINERAL FERTILIZERS PRODUCTION

Large-scale mineral fertilizer producing plants at present can't withstand competition nowadays due to a number of objective causes:
-slowdown of mineral fertilizers demand from 640 000 t/y to 20 -40000 t/y
- 20 -30 times decline of output and production of such quantities at high-scale plants lowers economical indices to non-profitable ones.
In order to decide the problem of providing the region with mineral fertilizers and taking into consideration that the region possesses two of three basic components of mineral fertilizers, namely : sulphur and potash it is suggested to create miniplants for manufacturing sulphuric and phosphoric acids as well as fertilizers. Such plants offer the following gains: constant utilization of production capacities, a small quantity of personnel, small joint costs, no problems with products sales and high degree of profitability. These plants having production capacity of 20 to 30000t/y of final products can be used for manufacturing various kinds of fertilizers depending on raw materials available and requirements.
Sulphuric acid production is suggested in the volume of 20 to 30000 t/y to be further used for fertilizers manufacturing and a part as a commercial sulphuric acid to meet the requirements of the region. Availability of phosphate raw material ( in prospect a local one - Volyn phosphate) can form a basis for developing a phosphoric acid production plant.
The main unit in the miniplant for manufacturing fertilizers should a block for mixing and granulating various compounds.
In accordance with preliminary calculations development of such plants require the following expenditure:
-a sulphuric acid plant with
a production capacity of 20-3000-t/y 5 mln Grv
- a phosphoric plant with
a production capacity of 20000-t/y 4 mln Grv
- compounding and granulation unit
( to 20000t/y) 0.8 mln. Grv
Payback period up to 1 year
Creation of miniplants will make it possible to eliminate a great number of environmental problems caused by operation of large -scale plants with concentration of great emissions and utilization of land and water resources in large volumes.