Processing and utilization of phosphogypsum and flotation wastes

In the process of Rozdil State Mining and Chemical Plant "Sirka" operation multi-tonne production wastes have accumulated , namely phosphogypsum and raw-ground limestone. The volume amounts to 4 mln.t and 40 mln. t respectfully. Adverse effect of the phosphogypsum dumps on the environment is manifested in air pollution, underground and surface water pollution as well as soil and plant cover contamination by harmful substances that are draining through the screen and are washed by rainfalls and scattered by wind.
The main trends in the above wastes treatment and utilization are:
- in agriculture as a chemical ameliorant with fertilizing properties - to be used on acid and salt soils. Efficiency of such ameliorant was proved by application practice. Need in the ameliorant is increasing from year to year because of soils deterioration caused by low standard of farming;
- in manufacturing construction materials - as binding and base materials for the products ( panels, blocks and others);
- in road construction, a road base material;
- in cement production , as regulator of concrete setting, mineralizing agent in the process of cement clinker calcination;
- in chemical industry, for manufacturing sulphuric acid and cement (or lime);
- in paper and paints making, as filler.
The main this case is the fact that phosphogypsum and flotation wastes are free raw materials.
Waited deposit of investor - USD 1.0 mln. The Rozdil SMChP "Sirka" can deposit into realization of the investment project USD 1.0 mln. Term of cover a cost is 3 years.