Mineral Processing

Crushing & Screening

Crushing & Screening

The two most important properties of ore treatment to be considered are the size and mineralogical composition of the particles. The behaviour of the particles in each mineral processing equipment are significantly affected by the variation levels of the the size and mineralogical composition properties. In terms of particle size, crushing is the first step to reduce large size pieces to uniformly sized smaller pieces which are acceptable for grinding circuit feed.

Antek incorporates equipment and services of proven crusher manufacturers into their crusher circuit design. Our target in designing a crushing circuit design is to achieve the most efficient approach in terms of product size reduction and energy consumption.

  • Primary gyratories
  • Jaw crushers
  • Cone crushing
  • Storage feeders and conveyors
  • Mobile and semi-mobile plant as well as conventional complete plant
Grinding / Classification

Grinding / Classification

Size reduction is generally accomplished in several stages, as there are practical limitations on the ratio of size reduction through a single stage. Comminution is the science of the size reduction of rocks into fine material. Crushing and grinding are used in combination with classification process in mineral process plants.

Physical separation of minerals requires that mineral particles to be liberated by comminution. Successful separation techniques require the reduction of particles dimensions corresponding to the scale of mineralogical texture.

Antek’s hands-on experience in design and development of many comminution circuits worldwide, with incorporation of the equipment and services of well known crushing and grinding mill manufacturers, provides our clients with the most efficient solution, while obtaining the desired particle size distribution, and maintaining lowest level of steel and energy consumption.

  • Autogenous and seminautogenous grinding
  • Conventional rod and ball mill circuits
  • HPGR circuits
  • Conventional classification by screening, wet or dry
  • Hydraulic classification (cyclones or hydroclassifiers)
Concentration

Concentration

After liberation from the gangue material, valuable minerals need to be concentrated in further processing steps. Different physical and chemical processing circuits are used to concentrate the valuable minerals on the basis of their chemical composition, their physical specifications, their size distribution and the cost of the various options.

Antek has developed a unique expertise in mineral concentration of iron ore, gold, base metals and industrial minerals. Proven technology, the latest efficient innovations, and best tools are used in all our projects.

  • Leaching and heap leaching
  • Conventional flotation and column flotation
  • Gravity, magnetic and air separation
  • Thickening, filtration, and drying
  • Hydraulic classification
Pelletizing(Aggloremation)

Pelletizing(Aggloremation)

The agglomeration is a process which uses fine particles, added with binders or other products to form pellets, briquettes or nodules (sinter). This process is mainly used to produce iron ore pellets which supply the blast furnaces. The performance of a pelletizing circuit requires physical processes such as regrinding, hydroclassification, screening, mixing and usage of balling discs or drums to form the pellets. The quality of the end product is also influenced by the addition of specific additives and their methods of addition.

Antek has a vast experience in design, operation, development and improvement of many pelletizing circuits worldwide, enhanced with knowledge of equipment of various recognized manufacturers. This expertise provides our clients with the most effective plants producing quality pellets with low energy consumption, low operating cost and a reliable process.

  • Communition
  • Classification
  • Hydrosizers
  • Magnetic separators
  • Pellet plant and agglomeration
  • Materials handling
Carbon Plants (ADR)

Carbon Plants (ADR)

There are predominantly three methods employed in industry to adsorb leach gold from a pulp stream onto activated carbon. The methods are Carbon-in-Leach (CIL), Carbon-in-Pulp (CIP) and Pumpcell technology.

CIL and CIP are typically counter current operations while the Pumpcell technology makes use of the carousel mode of operation.The CIL mode of operation is when the leach and adsorption circuit are combined into a single process. A CIL mode of operation has advantages when carbon enhances the leach efficiency by competing with other gold adsorbants (pre robbers) constituents in the ore.In a CIP operation the majority of the leachable gold has been leached prior to the first carbon adsorption stage.

The gold adsorption is carried out in specifically designed tanks that are situated after the leaching tanks in the overall process flow. The adsorption tanks are typically a quarter to a tenth of the size of the leach tanks.The CIL and CIP modes of operations occur in a number of tanks placed in series. Pulp flows continuously from the first tank to the last, while carbon is pumped counter current from the last tank to the first. The main difference between CIL and CIP lies in the extent to which gold is leached prior to carbon adsorption.For both CIL and CIP applications the adsorption tanks can be arranged in the conventional cascading configuration or the tanks can be positioned on the same horizontal elevation.Pumpcell technology was developed to introduce an alternative approach to the design of conventional CIP adsorption circuits. Pumpcell technology has become the carbon adsorption route employed on modern day gold plants. The operating cost benefit realised over life of mine have attributed to the increasing popularity of the Pumpcell technology.

Chemical Preparation Systems

Chemical Preparation Systems

The total plant is designed to minimise the project time schedule for site installation and hot commissioning, with minimal changes. It gives several advantages to end user and to EPCM companies.Reagent Package Plants include but is not limited to:

Sodium Cyanide
Caustic Soda
Lime
Cyanide Detox
Sewage Treatment Plants