• Specification：Various
• Trademark：HZE
• Origin：China
• Production Capacity：5 Lines,Year

Basic Info.

Specification Various Trademark HZE Origin China Production Capacity 5 Lines/Year

Product Description

Small Scale Portable Modular Gold Pregnant Solution Recovery Plant

APPLICATION
The modular batch leaching plant recovers gold from concentrate and high-grade ore. Concentrate produced by flotation and/or gravity concentration and high-grade ore is collected to process together.

MAIN FLOWCHART



PROCESSING CHARACTERISTICS
The materials, steel balls and cyanide solution are loaded into the ball mill to grind and leach at the same time. Also, oxygen is fed into the drum of the ball mill intermittently to offset oxygen consumption of chemical reaction which greatly improves the leaching efficiency. The suitable grinding fineness is obtained by controlling grinding time which ensures gold is liberated fully and dissolved by cyanide.
The slurry after grinding is discharged from the ball mill to the leaching tank for continuous leaching during agitation. The slurry settles naturally after hours of leaching. The clarified pregnant solution is discharged out of the leaching tank and flows into the pregnant solution pond, the barren solution is fed into the leaching tank to continue leaching and decantation. The gold extraction rate can be greatly improved by controlling the duration of leaching and decantation for repeating the cycle several times.
The depurated pregnant solution is pumped to Merrill-Crowe system to replace the dissolved gold with zinc powder. The vacuum pump removes oxygen out of the sealed Merrill-Crowe system to minimize zinc loss and improve replacement efficiency. After the replacement reaction is completed, the gold sludge naturally settles and the barren solution is discharged into the barren solution pond. After enough accumulation of gold sludge, it is discharged out of the displacement agitation tank with conical bottom. Zinc is removed out gold sludge by sulfuric acid and the remainder is sent to smelt the bullion bars.



SPECIFIC EQUIPMENT

Batch Grinding Ball Mill
The ball mill is designed as a sealed structure specially for batch leaching. The materials, cyanide, water and grinding balls are fed into the ball mill arbitrarily as required. The ball mill is equipped with a special inflatable tube which periodically supplies air into the drum of the ball mill during grinding to keep enough oxygen content in the grinding drum for ensuring that gold exposed during grinding reacts with cyanide in time. It enhances the leaching ability and improves the leaching efficiency.

Leaching and Decantation Agitation Tank
An agitator is assembled in the tank with drainage outlets of different height. The tank has the dual functions of agitating leaching and decantation. Slurry settles naturally after each leaching action. It is decided which height outlet discharges solution according to the content of gold in the solution. Then the barren solution is filled to continue leaching and decantation.
The leaching efficiency is increased much because the gold bearing solution is discharged out of the leaching tank in time and the tank is filled by barren solution.
Because of batch operation, a battery of tanks works by turns.

Merrill-Crowe Process Equipment
The depurated pregnant solution enters the closed circular tank with the agitator and cone bottom. The vacuum pump discharges air from the tank and the zinc powders are fed into the cylinder to replace superfine gold powders out which settle in the cone bottom of the tank. The sampling valve is installed on the tank body for measuring the gold content in the solution at any time to decide whether zinc powders are added more or not. Natural sedimentation occurs and the barren solution is discharged after the reaction is completed.
This process equipment has the advantages of simple structure, convenient operation, more than 99% replacement efficiency, low zinc consumption, and reducing the workload and acid consumption of acid pickling in the next process.



SPECIFICATIONS
Per batch grinding capacity: 650kg
Total leaching time: 24-48 hours
Leaching particle size: 325 mesh
Cycle times of leaching- decantation: 3-4





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?

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.