Products – Dorowa

Our Products

Phosphate Concentrate

High-grade phosphate concentrates used in agriculture and industry
37% P2O5 content
superior quality
suitable for food grade phosphoric acid
environmentally friendly

Magnetite

High-quality magnetite used in various industrial applications
Coarse Magnetite (10-15%) passing 45 micron
Fine Magnetite (80% - 90%) passing 45 microns
Max fine (90 – 95%) passing 45 microns

Operations

Operational Excellence: Explore our operations, showcasing our commitment to best practices.

Mining

Mining is by simple open cast methods using heavy earthmoving machinery mainly owned by the mine. The phosphate ore in the pits is broken down by two methods, ripping and dozing and drilling and blasting. The broken ore is then loaded into tractor dumpers using front end loaders before being hauled to the grizzely and to the plant for further processing.

Milling

Ore from the grizzley is fed to the mill via a 30 tonne bin which smoothens out fluctuations in the feed. The ore is then wet milled semi autogenously (steel balls added to aid the milling process) in a 4.27 by 6.10 metre mill at a rate of about 155 tonnes per haul to produce a watery mixture called a slurry.

Desliming

The very finest material (less than 0.03 mm) produced during milling are detrimental to the floatation efficiency and are therefore removed by cyclones as slimes before the floatation process. About 20% of the materials fed is removed as slimes and pumped directly to the slimes dam for disposal

Floatation

The deslimed slurry is fed into floatation cells where chemicals are added to facilitate the flotation process. It is in these floatation cells that the phosphate particles are separated from the sand particles. The sand particles, also known as tailings, are transported by pipelines to the slimes dam for disposal.

Filtration

The phosphate concentrate from the floatation cells is dewatered by a disc filter and conveyed to the stockpile pad at about 10-12% moisture content

Drying & Dispatching

From the stock pile, which sometimes has been partially sun dried, the concentrate is fed by front end loader into the dryer where the rock is dried to a moisture content of less than 1%. Coal at a rate of about 13kg/tonne is used to fire the dryer and dry the concentrate.