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Click to add WeChatZinc powder replacement gold extraction process is based on zinc wire replacement, from cyanide gold-containing precious liquid The main method of extracting gold from . The process can be divided into the following stages: Grinding and classification, concentration and dehydration, leaching and washing, noble liquor purification, noble liquor deoxidation, and zinc powder replacement. The various steps in the gold concentrate zinc powder replacement process will be introduced in detail below.
The gold concentrate grinding and grading process is The gold concentrate enters the mixing tank through the screw feeder, adds water and stirs evenly, and then pumps it into the hydraulic Classification operations are carried out in the cyclone, and the overflow part flows into the next process for treatment. The underflow part is sent to lattice ball mill for grinding because the size of the ore particles does not meet the standard. . After grinding, the slurry will enter the hydrocyclone again for classification. Such a loop can improve the efficiency of the production line and also improve the utilization rate of materials.
The classified slurry is pumped into the unit by a slurry pump The concentration and dehydration operation is carried out in the layer thickener. In order to improve the concentration efficiency, chemicals can be added to prepare the slurry to speed up the precipitation of gold ore particles. The deposited ore particles flow into the pump box through the rake at the bottom of the thickener for further processing. The overflow water from the thickener can be treated and recycled.
This process can be divided into two steps, namely< strong>One dip and one wash and two dip and two wash processes.
One dip and one wash: During the "one dip" operation, the gold ore slurry stored in the pump box The slurry pump is pumped into three groups of leaching tanks for leaching. The leachate of "one leaching" is pumped into the three-layer washing thickener for "one washing". The precious liquid obtained after washing enters the next step of the process.
Two immersions and two washes: The lean liquid enters the "two immersions and two washes" process. The equipment used in this process is the same as that of "one immersion and one wash". The washed products enter the box filter press for dehydration. The final product is leaching residue, and the removed water can be treated as sewage and then enter the circulation system as water for slurry mixing.
After washing and leaching, there are still some suspended solids in the noble liquor. In order to prevent these suspended solids from entering the replacement operation and affecting the replacement effect, a box filter press is needed to remove suspended solids. Doing so can also improve the quality of the replaced gold mud. In actual production, the lower the suspended solids content in the purified liquid, the better. After the suspended solids are removed, your liquid needs to enter the next step of the production process.
Because the dissolved oxygen in the noble liquor is essential for zinc storage It is harmful to gold, so in the process of gold extraction, deoxygenation of precious liquid is an essential step. When carrying out the deoxidation operation of your liquid, a vacuum deoxidation tower is generally used. Therefore, the specific process of deoxidizing your precious liquor is as follows: After filtering, the precious liquor flows into the vacuum deoxidation tower for deoxygenation. The deoxidized precious liquid is pumped into the zinc powder mixing device for zinc powder replacement.
This process mainly includeszinc powder addition< /strong> and replacement are two major steps. When adding zinc powder, pay attention to the dosage of zinc powder. During the addition process, in order to avoid zinc powder oxidation and water absorption and agglomeration, zinc powder should be added quickly and continuously. In addition, in order to avoid manual errors and reduce production efficiency, the general mineral processing plant will use a spiral zinc powder feeder and an automatic zinc powder mixing device to complete this process.
When zinc powder is mixed with your liquid, the displacement reaction has already started, and then the displacement reaction and the filtration of gold mud will be completed in the displacement machine. Generally, mineral processing plants will use Box Filter Press as the final zinc powder replacement reaction device. The replaced gold mud will be sent for smelting. The lean liquid part requires washing and sewage treatment, and the treated water can be recycled.
The above is the overall process flow of gold extraction by zinc powder replacement method. During this process, it should be noted that the purification, deoxygenation and replacement of your liquid are carried out continuously. In order to avoid interruption of the process flow, mineral processing plants generally use vacuum suction to complete the transfer of precious liquid from purification to deoxygenation.
In gold ore beneficiation operations, the selected technological processes vary depending on the properties of the gold ore. If you want to obtain an ideal return on investment, it is recommended to conduct a beneficiation test. Through the beneficiation test analysis, Customize and design a suitable gold ore beneficiation process. Xinhai Mining has more than 20 years of experience in gold ore beneficiation. We have designs for rock gold mines, placer gold mines, refractory gold ores, etc. If necessary, Welcome to consult.
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