Re-election method for selecting gold mine
Gold sand ore beneficiation principle is to maximize the recovery of gold by gravity separation from the raw ore and its associated various heavy minerals, and then re-election, flotation, amalgamation, electrostatic and magnetic separation operations will jointly selected from Gold and various heavy minerals are separated from each other for the purpose of comprehensive recovery. The classification of gold deposits is generally divided into processes such as disintegration and screening, de-sludge and sorting.
First, disintegration and screening
Many gold deposits contain cemented muds, which have a particle size of more than 100 mm. If the mud mass is not broken, it will be removed along with the waste rock during the screening process, resulting in loss of gold. In addition, the cement can be cemented on gravel or pebbles, and if it is not broken, it will also cause gold loss during the screening process.
Second, de-sludge
Materials less than 0.1 mm in gold ore are generally free of gold or contain little gold. Gold less than 0.1 mm, commonly known as floating gold, is difficult to recycle during the sorting process, while the same grade of slime interferes with the sorting process, especially the mechanical sorting process. Therefore, in the sand gold mining machinery concentrator, always try to remove the slime less than 0.1 mm. Desliming equipment commonly used in production is a desiccant bucket of various specifications. The chute selection allows for a wide range of material sizes and a large amount of processing, so that the chute is not de-sludged before the sorting.
Third, the selection
Practice has proved that the re-election method is the most effective and economical method for processing gold deposits. Due to the different particle size composition of gold in the gold mine, the effective grain size limits of the various re-election equipment are different, so the reasonable sand gold ore sorting process should be the joint operation of several re-election equipment.
The gold-bearing concentrate obtained from the rough selection section has a gold grade of 100 g/ton and a heavy sand mineral of more than 1-2 kg/ton. There are currently three methods for the treatment of gold-bearing coarse concentrate:
1. Manually scouring the gold particles with a gold pan and discard them with heavy sand;
2. Mercury is mixed with a mercury-mixing cylinder, and the mercury paste is obtained and discarded by heavy sand;
3. After the gold is extracted by manual panning or amalgamation, the heavy sand is sent to the selected plant for treatment, and various heavy sand minerals are separately recovered by magnetic separation and electric selection.
The gold recovery rate of the gold deposit: the two-stage chute is 70%~74%, the chute rough selection, the jigging sweeping, and the shaker selection process are 75%-80%.
B2 Forged Grinding Ball is hammer forged from selected high quality carbon and alloy steels. By hammer forged, the balls have good density and have the advantage of high hardness and good wear resistance, special used to gold mining, copper mining and sliver mining etc. Zhongwei B2 Forged Ball available diameter from 20mm to 140mm, B2 raw material chemical composition is C:0.72-0.85, Si:0.17-0.37, Mn:0.7-1.0, Cr: 0.4-0.6, P:≤0.025, S:≤0.025, hardness is 55-65HRC.
Forged Ball,Forged Steel Grinding Ball,B2 Forged Steel Ball,B2 Forged Grinding Steel Ball
Jinan Zhongwei Casting And Forging Grinding Ball Co.,Ltd , https://www.cngrindingballs.com