Small Scale Portable Modular Gold Gravity Concentration Equipment
APPLICATION
The relocatable modular gravity concentration plant recovers grained gold from the ores, especially for high grade ores.
MAIN FLOWCHART
Note:
It is suggested that tailings of the concentrating table used as the cleaner should be collected and further grinded to - 325 mesh by a small ball mill to recover gold by intensive cyanide leaching at interval days. If mercury is allowed to be used in the country where the project is located, the tailings of the cleaner are grinded to - 150 mesh for amalgamation to recover gold. But amalgamation is not recommended process to recover gold for health and environment.
FUNCTIONAL MODULES
For the situations of raw materials and the customer's requirements, it is free to select the comminution module, grinding and classification unit, gravity concentration module, water supply module and power supply module to form a complete plant which recovers gold as much as possible. The equipment selection and arrangement of the gravity concentration module is freely defined according to the particle size distribution and occurrence status of gold.
Crushing Module
The rocks are crushed to the qualified particle size for grinding. The module is composed of hoppers, crushers, belt conveyors, feeders and so on.
The ores are usually crushed in two stages. According to the actual situation of the site, the primary crusher can be mounted in the mining area or the processing plant. The crusher is usually driven by a diesel engine if it is located in the mining area.
Grinding and Classification Unit
The closed-circuit grinding and classification system consisting of the ball mill and spiral classifier can liberate ore into the suitable particles for recovering free gold by gravity separation. The unit can be adjusted to a closed-circuit system consisting of the ball mill, slurry pump and hydrocyclone if the customer demands.
The grinding and classification unit is amounted in the whole steel frame.
Water Supply Module
It is composed of the water tanks, water pumps and water supply pipeline. The optimized water balance is achieved by the controlled the utilization rate of water.
Power Supply Module
It is composed of the diesel generators, distribution devices and the starting panels and so on. The module is suitable for the areas with inconvenient traffic and shortage of the power grid.
SPECIAL GRAVITY CONCENTRATION MODULE
The coarse gold, fine gold and residual gold are recovered by the jig, centrifugal concentrator and sluice box in turn for the best recovery. The shaking table is used to improve the gold grade of the rough concentrate produced by the jig and sluice box. The concentrate of the shaking table and centrifugal concentrator is upgraded to very high grade by the concentrating table.
The concentrate of the concentrating table can be smelted and casted to the bullion bars directly. The tailings of the concentrating table has high grade gold, so it is re-grinded for intensive cyanide leaching and Merrill-Crowe process to recover gold.
Saw-tooth Wave Jig
This is a new type of energy saving and high efficient gravity separation equipment and developed based on the traditional jig. The pulsation curve of this kind of jig is saw-tooth wave shape which causes that upward flow is quicker than downward flow, i.e., the time of upward flow is shorter than the time of downward flow. It enhances the looseness of the bed, alleviates the inhalation effect, promotes the heavy mineral particles to settle fully, suits for a larger range of separation particles size, and greatly improves the separation ratio and recovery of the equipment. The water consumption will be saved 30-40% by this kind of jig comparing with the traditional jig. It is easy to install the jig, adjust the stroke, steplessly adjust the frequency by the frequency converter.
The jig is used as the first concentration equipment to recover the coarse grained gold.
Centrifugal Concentrator
The working principle of the centrifugal concentrator is that centrifuge force enlarges the gravity of the mineral particles to separate heavy and light particles. The key component of the separator is a conical concentration bowl with good wear resistance which rotates at high speed driven by the electric motor and is surrounded by pressurized recoil water. Slurry is fed from the top to the bottom of the conical concentration bowl. The concentration bowl has a series of the annular groove inside. The mineral particles are thrown to the annular grooves obliged by the centrifuge force generated by the rotation of the concentration bowl. During operation, only heavy particles can withstand recoil water to stay in the grooves and become the concentrate, the lighter particles flow upward and overflow out of the concentration bowl as tailings because they have less centrifuge force and can not withstand recoil water injected out of the grooves.
The equipment has remarkable effect on different particle size ranges of free gold, especially for fine gold particles to show excellent performance. After the equipment is installed after the jig in the gravity concentration module to improve the gold recovery more than 90%, and achieve the enrichment ratio to 1000 times.
Advantages and characteristics:
1. High concentrating ratio and high recovery;
2. Steady recovery performance;
3. Environmentally friendly (no any chemicals required);
4. Low water and power consumption;
5. Low production costs, good part wear resistance and simple maintenance.
SPECIFICATIONS
Model
Item |
HZGB-1 |
HZGB-2 |
HZGB-5 |
Capacity
(MT/h) |
1 |
2 |
5 |
Inlet size D80
(mm) |
18 |
18 |
18 |
Grinding size
(mesh) |
150 |
150 |
150 |
| Ambient temperature (ºC) |
-15~45 |
-15~45 |
-15~45 |
Gold recovery
(%) |
70~90 |
70~90 |
70~90 |
ADVANTAGES
(1) Maximizing the utilization of mineral resources ensures high recovery and economic benefits;
(2) The advanced technology and processing are adopted to get rid of the harmful chemicals such as mercury completely and protect human health and natural environment;
(3) Energy, water and consumables are saved, the number of operators is reduced, the capital of investment and the cost of production are decreased;
(4) Installation is fast, operation is easy, running is reliable, and different functional modules are combined freely to achieve the maximum recovery of gold;
(5) Minimal civil work requirements and the construction period reduced very much;
(6) It is easy to containerized, shipped or transferred to another location and reassembled, even in the most remote locations in the world.
1. What is the main business scope of your company?
HZE is a company with R&D center, design institute, manufacturing factories, installation and commissioning teams. Our customers are in the mining and mineral processing fields. Our major businesses include mineral processing EPC (engineering, procurement and construction), project consultation, engineering design, mineral processing equipment manufacturing, on-site installation, commissioning, staff training, customer project operation management, spare parts supply and technical support. Customers are free to choose any one or any combination of our services.
2. What are the outstanding advantages of your company?
The one-stop service of mineral processing engineering project and equipment is our core competitiveness.
The most important feature that HZE distinguishes itself from other engineering companies, design companies or consulting companies is that we are also an equipment manufacturer with a production plant of 50,000 square meters, and we have complete manufacturing rout and the related equipment.
HZE distinguishes itself from other equipment manufacturers by owning its own R&D center and engineering design institute.
HZE distinguishes itself from many mining machinery enterprises by possessing an expert team with members including not only senior engineers of the company, but also top Chinese technical experts, university professors and researchers.
3. What are the characteristics of your company's 3D design?
HZE not only uses 3D software to design equipment, but also uses 3D software to design process flow, pipeline, steel structure, auxiliary facilities, etc. of the whole mineral processing project. We even use 3D design for equipment packaging, container packing and equipment instructions manual. This greatly improves the quality of equipment and engineering, shortens the construction period, facilitates technical discussion and evaluation, facilitates project management, improves construction safety and reduces project cost.
4. What are the service features of your company?
- Customers who whether buy our equipment, or entrust us with EPC, or require us to provide a certain service, cooperate closely with us to carry out specific operations and supervise our implementation throughout the process.
- HZE will try to understand the basic situation and needs of customers as detailed as possible before the sale, formulate a preliminary plan according to the specific situation of customers, and get unanimous opinions after communications and discussions with customers to determine the plan.
- We set up customer files for every customer who signed the contract with us and upload them to the Cloud where customers can also get an account and password. Customers can have all the documents, videos and pictures, technology, services, execution, operation, management and control, maintenance and so on related to the business.
- Whether it is in the process of general contracting, equipment manufacturing or providing some kind of service, we welcome customers to know about our implementation on the spot or through the network, and put forward requirements and opinions.
- We assist users who have used our products to formulate operation specifications and make suggestions on maintenance plans and spare parts inventories. In addition to routine on-site installation, commissioning and training, during the production period after we handing over equipment to customers for use, we often understand the equipment using situations through the network and provide guidance and training to customer management and operators.
- For the clients who have just start the mining business, we provide the opportunity of training and practice in China's mines for the clients' employees, until they are skilled in operation and maintenance.
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