Amalgamation gold recovery time depends on the shape of native gold particle size, the fineness of the gold particles, the mass of mercury, the temperature of amalgamation, pulp density, methods and equipment amalgamation factors.
The particle size shape and monomer dissociation degree of gold are mainly related to the grinding operation, especially the influence of monomer dissociation degree. Appropriately improving the fineness of grinding can improve the recovery rate of amalgamation, and it is suitable for gold particles mixed with mercury. The 0.2-0.3 mm, the lower limit of the particle size of the mercury-mixed plate in the grinding cycle is 0.015 mm, but the fine gold particles are lost with the slurry.
The color of gold is higher than that of pulse gold. The gold color in the oxidation zone is higher than that of the original ore. The gold with high color is easy to mix with mercury. The amalgamation ability of the gold particle surface is significantly reduced. Mercury is divided into internal amalgamation and external amalgamation. External amalgamation is a process of amalgamation and gold extraction outside the grinding operation. Externally mixed mercury is commonly used in domestic fixed mercury amalgamation plates and vibrating amalgamation plates. In the process of crushing and grinding, the gold and gold extraction process is carried out in South Africa and the United States. The gold mines in South Africa and the United States often carry out internal amalgamation in the mining machine. The small and medium-sized gold mines in the former Soviet Union often use the boring machine. Internally mixed mercury is more efficient than externally mixed mercury, and the quality of mercury is good. The concentration of the externally mixed mercury slurry should not be too large to form a loose thin slurry flow, and the flow rate should not be too high, so that the gold particles settle to the mercury plate. The concentration of the internal mixed mercury slurry is preferably 30% to 50%, and the mercury should be suspended.
The pH of the slurry has a great influence on the mercury mixing effect. The effect of mixing mercury in the acidic medium and the cyanide solution is good, but in the case of a lot of slime, the acidic medium can not coagulate the slime, and the slime contaminates the surface of the gold particles, affecting the effect of mercury mixing. Mercury is mixed in an alkaline medium, such as the use of lime as a conditioning agent to precipitate soluble salts and eliminate the adverse effects of oil quality. When the pH is between 8 and 8.5, the effect of amalgamation is better.
The quality of mercury has a great influence on the effect of mercury amalgamation. Pure mercury is not good for wetting gold. Mercury contains a small amount of gold, silver and barium metal to reduce the surface tension of mercury and improve the wetting effect. Oil and other organics can contaminate soil and fine gold particle surface, ore sulfide ore, talc, graphite, arsenic compounds easily attached to the surface of the mercury, mercury also affects wetting ability of gold.
When adding mercury, the amount of mercury should be increased. Too much will reduce the elasticity and consistency of the mercury paste, so that the mercury paste will be lost with the slurry. Insufficient mercury addition makes the mercury paste hard, loses its elasticity, and reduces the gold-trapping performance. After the mercury plate is put into production, the initial mercury application amount is 15-30 g/ m2 . After 6-12 hours, mercury is added. The amount of mercury added is 2-5 times of the ore content, and the mercury consumption is usually 3-8. Grams per ton of ore.
In addition, the temperature also affects the amalgamation effect. Too low a temperature will increase the viscosity of mercury and affect the effect of mercury mixing. If the temperature is too high, the mobility of mercury will increase, and part of the mercury will be lost with the loss of mercury. Therefore, the mercury-mixing index is prone to seasonal changes, and the mixed temperature should generally be greater than 15 °C. The effect of adding mercury and adjusting the concentration of the slurry is used to eliminate the influence of temperature.
Metal Body Square Water Cooling Tower
This series of products run stable, low noise, energy-saving, in office buildings, shopping malls, hotels, residential areas and other central air-conditioning supporting the use of better results.
The company's standard cooling tower according to the international design conditions design, can also provide customers with non-standard operating conditions or specific sizes under the special, special design.
The circulating water pump suction port shall be located below the water level of the cooling tower catchment basin, and the cooling tower outlet pipe shall not be allowed to be higher than the maximum water level of the catchment basin.
Pipe mounts should be pipe racks and cooling towers should not be allowed to directly bear the weight of the pipes.
The rehydration pipe of the cooling tower should be provided with a support stand to avoid vibration of the pipe when the float valve is rehydrated.
Rehydration pressure should be below 5m water pressure, national standard
The flannage pressure is 1.0Mpa.
When two or more units are assembled, our company will provide a connecting balance tube to balance the chassis water level. The tower top inlet should be set with a conditioning valve in order to enter each
.The water level of the tower is uniform.
The noise is measured at dm1.13VL-W at the equivalent diameter of the cooling tower (Dm1.13VL*W), 1.5 meters above the ground height, wherein L and W are the shape rulers of the tower
inch long and wide).
The use of cellular continuous blister series of diversion,heat dissipation, water collection three-in-one native filler, the whole suspension, gravity cloth water, low drop of water, with cold effect
High, low energy consumption, less drift water, less noise and so on, floating water rate is less than 0.001%.
When connecting different types of towers, the bottom basin water level height of different types of towers must be taken into account, and the base height must be adjusted to maintain the water level balance of the towers.
Metal Body Square Water Cooling Tower,Tower Water Cooler,Water Cooled Cooling Tower,Tower Cooling System
Wuxi Ark Fluid Science Technology Co., Ltd. , https://www.arkfluid.com