Akkerman deposit

AKKERMAN DEPOSIT (RU: Аккермановское месторождение) is the complex deposit of the iron ores and flux limestone in the Gaysky district of the Orenburg province of the RSFSR. It is developed by the mining administration of the Orsk-Khalilovskiy metallurgical combine.

The Akkerman mining enterprise, which has been created in 1938 on the basis of the Akkerman deposit, includes the open pit mine and two crushing-screening plants. The Lower Carboniferous limestones of the deposit with the thickness of up to 300 metres form the syncline of the north-western strike (the length is about 12 kilometres, the width is 2-3 kilometres). There are laying on the surface of the water-eroded and karstified limestones the iron ores (from 1 to 50 metres), which are represented by the siderites (lower horizon), which are containing 27% of Fe, naturally doped (limonite) brown iron ores (32% of Fe), and also nickel, chromium, cobalt.

The deposit is developed down to the depth of 40-80 metres by the open pit (by the benches of the height of 10 metres) with the usage of the blasting works, and with the external forming of the dumps of the waste rocks. The transportation of the rocks of the overburden and of the minerals is performed by the electrified railroad transport. The processing of the limestones at the crushing-screening plants includes the crushing and screening according to the classes: 300-130, 130-80, 80-55, 55-25, 25-10, 10-0 millimetres. The iron ores, which are extracted along the way, are stockpiled. The extraction of the raw limestone is 3,805 thousand tonnes; the production of the marketable limestone with the average content of CaO of 53,8% is 3,706 thousand tonnes (1981). It is planned the further increase of the extraction of the limestone up to 6.0 million tonnes per year. The productivity of the average worker is 9.6 thousand tonnes of the rock mass per year.