The company NPK GRAVICON offers solutions for concentration of manganese ores based on both classic water-pulsation jigging machines and jigging machines with a moving sieve that have proven themselves in manganese enrichment.
The complex consists of crushing and screening and concentrating sections. The crushing and screening section involves a two-stage crushing, the withdrawal of the minus 2 mm class from the enrichment process due to its low liquidity, and the supply of raw material 2-10 ... 40 mm to the enrichment module. The optimal fineness of the original is determined by the results of laboratory studies on dressability. The enrichment module separates the feedstock to produce three products: 1st grade concentrate, 2nd grade concentrate and tailings. As an option, it is possible to install a recleaner submodule for finishing the concentrate of the 2nd grade to the 1st. It all depends on the limiting parameters: the planned profitability and the permissible content of Mn on board.
If the required productivity is high enough (200-400 tons/hour), there is a modification of the enrichment module in two lines for separate enrichment of classes 2-10 mm and 10-30 ... 40 mm. In this way, a better separation quality is achieved with a slight increase in capital costs. With the required productivity of 30 ... 50 tons / hour, such a solution is also possible, but less advisable.
Our first experience of enrichment of manganese ores goes back to the development of the Gipromashugleobogashchenie design and design institute, from which we come from, when the employees of the GRAVICON company at the Ordzhenikidzevsky Mining and Processing Plant (the Chkalovskaya enrichment plant) introduced only recently mass-produced jigging machines of the MO208 type (1987 . .. 88).
In the late 90s. a series of jigging machines with a movable sieve (OMPR) was developed, modernized and introduced. As practice has shown, jigging machines with a movable sieve in the enrichment of manganese ores showed significantly better quantitative and qualitative indicators compared to classical jigging machines (the separation factor is 30% higher). The development turned out to be so successful that even years later, the Marganets Mining and Processing Plant expanded and updated its fleet of this equipment.
Improved jigging machines with a moving sieve have found application not only for manganese ores, but also for the enrichment of alluvial deposits in Africa (Liberia, Guinea).
Our jigging machines operate on concentration of manganese in Ukraine, the Republic of Kazakhstan and Georgia. It was on the initiative of our Kazakh colleagues, the leading technologists of the industry, that our machines were improved and received a module without elevator unloading. With all the advantages of dewatering elevators, they are: a) expensive; b) difficult to maintain, especially when it is necessary to replace the guides. Our solution increase reliability, reduce operating costs and reduce the time for routine maintenance and repair.
When concentration manganese ores at the decision-making stage, it is important to study the initial product. A striking example of why is the following case. In 2008, the Georgian government held a tender for the sale of concessions for the development of areas of the Shkmerskoye field. As is known, the Chiatura manganese deposit has been successfully developed in Georgia for a long time. We were approached by the Tbilisi company METEX, which planned to acquire a license and start processing manganese ore. Both the oxidized and carbonate ores they presented for research (representative samples from 55 wells) visually, even from the point of view of leading industry experts, looked very similar to the ores of the Marganets deposit and should have been well enriched. However, studies on dressability showed practically no separation of the original by layers: in the concentrate, the Mn content was only 21% (0.5 ... 1% higher than in the tailings - i.e. in the region of statistical error). And in-depth studies have confirmed this - in the ores of the Shkmer deposit, Mn inclusions are very small in size and evenly distributed throughout the ore, which makes its enrichment unprofitable and impractical. At least in those areas of the field that were offered for purchase.
If you have tasks for the complex concentration of manganese ores (including dumps with a low Mn content), we are ready to conduct laboratory studies of your source material for washability, evaluate the quantitative and qualitative concentration indicators under industrial operation, capital costs, processing costs and design the optimal technological scheme based on your conditions and needs.