Mineral Processing Equipment
Heavy-duty process equipment, process development services, and parts & service support for mineral processing operations.
Mineral Processing
Evergreen designs, builds, manufactures, installs and maintains equipment throughout the entire value chain of mineral processing plants across all commodity sectors, from diamonds to coal, gold, iron ore, platinum and phosphates.
- Leading range of Crusher, Ball Mill, Flotation Components, Filter Presses and Slurry Pumps
- Maximise processing plant utilisation to reduce overall plant costs
- Providing end-to-end mineral processing solutions and services
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Mineral Processing Range
Crusher Equipment
Crushers are machines used to reduce the size of rocks, stones and ore. They are often utilized in aggregates production, construction material recycling and in mining operations.
Mill and Scrubber Linings
Ball mill is a very important mineral grading equipment, which is indispensable for mineral processing, building materials, metallurgy and chemical industry.
Flotation Components
Flotation wear components are critical parts for flotation cell, Mian wear parts are impeller, diffuser, rotor, stator, Standpipes and Guide Plates.
Hydrocyclone
A Hydrocyclone separates sand and other solid matter from water with very little head loss and 90% or better efficiency.
Filter Press
Filter press is a separation process, specially employed by solid liquid separation using the principle of pressure drive, provided by a slurry pump.
Slurry Pumps
Slurry Pumps feature a split casing design to allow easy access to the liners, the impeller and the gland for maintenance.
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Mineral Processing Application
Gold Processing
Metallurgical processing of metalliferous ores in general and gold ores in particular, consists essentially of three stages, often colloquially referred to as: Bashing (crushing); Mashing (grinding); and Hashing (extraction/recovery).
Coal Processing
Coal processing involves crushing, screening and beneficiation.
Beneficiation can improve the quality of contaminated coal that would otherwise be wasted. Most cleaning processes involve washing coal in order to separate coal particles from stone particles.
Platinum Processing
The separation chemistry of the platinum-group metals is among the most complex and challenging of metal separations. Virtually all platinum-group metals are recovered from copper or nickel sulfide minerals, which are concentrated by flotation separation.
Copper Processing
The extraction of copper from ore is normally carried out in three major steps. The first step, mineral processing, is to liberate the copper minerals and remove waste constituents—such as alumina, limestone, pyrite, and silica. The second step, involving either smelting or leaching, removes a large proportion of impurity elements. The final step, refining, removes the last traces of the impurity elements and produces a copper product of 99.99 percent purity.
Iron Processing
Iron processing refers to the methods used to extract and process iron from its ores. The primary methods of extracting iron from its ores include: Mining, Transportation, Processing, Ore Beneficiation, Smelting, Refining, Casting and Finishing Processes.
Diamond Processing
Diamond processing is the practice of changing a diamond from a rough stone into a faceted gem. Cutting diamond requires specialized knowledge, tools, equipment, and techniques because of its extreme difficulty. Diamond processing phases: drawing/marking/planning, cleaving/sawing, bruiting and polishing, Final inspection, Recutting.
Chrome Processing
The chromite beneficiation process adopts the combined process of gravity beneficiation-magnetic separation-gravity beneficiation to beneficiate and purify the chromite ore, and the recovery rate and concentrates grade of the beneficiation can meet the ideal requirements. Therefore, it is widely used in the field of chromite beneficiation, and it is a very effective chromite beneficiation process.
Mineral Sands Processing
Various methods which include magnetic, gravity and electrostatic separation as well as chemical processes, are then used to separate the sands into individual mineral species. The ore is put through a screening plant which breaks it down into individual grains.
Industry knowledge
What Is Mineral Processsing in Mining?
Mineral processing, also referred to as mineral dressing, is a technique in extractive metallurgy that involves separating valuable minerals from the ore to create a concentrated and marketable end product.
What Are the 4 Stages of Mineral Processing?
In addition to making a profit, the primary goal of mineral processing is to transform ore with diverse characteristics into a uniform product that can be sold. To achieve this, the materials will go through four stages of processing in order to extract the desired raw material:
1. Crushing and grinding. Crushing and grinding, also called comminution, is the procedure of decreasing the fragment dimension of big rocks to be further processed down the line.
2. Sizing and classification. Sizing and classification is the procedure of separating various sizes of ore by screens. Better materials are transmitted to various stages of the mine than coarser materials.
3. Concentration. Concentration is the process of breaking down the materials till the wanted focus of unrefined material is reached. There are several various strategies for achieving the target concentration including:
- Automated ore sorting. Automated ore arranging uses optical sensors to arrange the rock into categories. This innovation is expanding to include more picking up specifications.
- Electrostatic separation. Electrostatic splitting up includes electrostatic separators and electrodynamic sensors, likewise referred to as high tension rollers. Because these separators rely on electrical currents, ore product requires to be completely dry. Costs are gone through the products and different from the gangue– the unwanted ore that is eliminated from the rewarding minerals. These separators are utilized to separate mineral sands.
- Froth flotation protection. Froth flotation protection uses a chemical collector and frother that develops bubbles on the surface of the slurry that hydrophobic materials bind to. The bubbles are gathered off the surface of the frother. Activators are made use of to allow the flotation of one mineral ore while depressants are used to prevent the flotation protection of the gangue.
- Gravity separation. Gravity splitting up is the process of dividing two or even more ore minerals in their particular actions to gravity paired with buoyant forces, centrifugal forces, and/or magnetic forces in a viscous material.
- Magnetic separation. Magnetic splitting up is the process of using electromagnets to extract the desired mineral ore from a conveyor belt. This procedure can be used with or without water.
4. Dewatering. Dewatering is the final process of getting rid of the water material of the mineral in order to dispose of the gangue and get to the preferred concentrate levels for bankability.
In the next section, we’ll take you through the ore’s journey from crushing to concentration.
How Does Mineral Processing Work?
As soon as the ore is transferred to the surface area of the mine, haulers feed the crushers with tonnes of big rocks, the first step in mineral processing.
After they are crushed to around 15 centimeters (6 in) in size, conveyor belts course the products right into accumulations near the concentrator structure for grinding.
The gravel is lugged by a conveyor belt to the concentrator center, where it is more reduced in dimension by droop grinding mills. At this stage, the ore is either combined with water or kept completely dry prior to experiencing the grinding treatment. The materials are grinded to around 5 cm (2 in) in diameter.
The reduced products are gone through displays to separate the ore, triggering minerals smaller than 1.3 centimeters ( 1/2 in) to travel through the screens.
Later on, the tinier ore will be sent to the round grinding mills for added grinding. On the other hand, the larger ore will certainly be directed to a pebble crusher in order to lower its size to 1.3 cm ( 1/2 in) and will after that be gone back to the droop mill phase.
The material that appears of the sphere mill is sent to cyclones that separate the bigger bits from the smaller sized bits. The larger fragments are after that sent back to the round mill, while the smaller particles are sent to the focus phase of mining.
In the focus stage, an extra focused and purer form of the desired mineral is created and crushed till it has the very same texture as talcum powder. It is after that transferred to a thickener where the concentrated material clears up and the process of eliminating water beginnings.
Currently, the ore has approximately 50% water, which demands the transfer of this material to a filter press in order to get rid of extra moisture from the mineral ore.
Ultimately, the minerals are dried out to eliminate the continuing to be water. The last concentrated mineral percent varies depending upon the mineral and the concentration procedure used.
The unrefined material is moved to one more off-site processing plant that smelts or fine-tunes the mineral ore right into the last raw material.