In the cyanidation process of gold , impurities can form various films on the surface of gold particles and affect the dissolution rate of gold. The resulting film and its effect on the dissolution rate of gold are as follows: 1. sulfide film    In the cyanide solution, when the sulfur ion concentration reaches 0.5 ppm , the dissolution rate of gold is lowered. This is due to the formation of an insoluble gold sulfide film on the surface of the gold particles which hinders the continued dissolution of gold. 2. Hydrogen peroxide film    When calcium hydroxide is used as a protective base, a calcium peroxide film is formed on the surface of gold to hinder the action of gold and cyanide. This can be thought of as the formation of lime and H 2 O 2 accumulated in solution as follows:   Ca(OH) 2 +H 2 O 2 → CaO 2 +2H 2 O 3. Oxide film    When ozone is added to the cyanide solution, a brick red gold oxide film is formed on the surface of the gold to reduce the dissolution rate of gold. 4. Insoluble oxide film    Appropriate amount of Pb 2+ has a growth-increasing effect on the dissolution of gold, and when it is excessive, it causes a blocking effect. This is because lead and gold form a primary battery, and gold becomes an anode in the primary battery, so gold is transferred to the solution. Excess Pb 2+ will deposit as an insoluble Pb(CN) 2 film on the surface of gold . 5. Xanthate gold film    When the flotation concentrate is cyanated, the concentration of gold in the cyanide solution exceeds 0.4 ppm , and the dissolution rate of gold decreases. This is due to the formation of a gold film of xanthate on the surface of gold. In order to overcome this adverse effect, in the case of ensuring the flotation recovery rate, the amount of the flotation agent is reduced as much as possible, and the drug is removed before the flotation concentrate is cyanated.
Installation steps for SANY hydraulic cylinder seals
For Sany Cylinder Seal Kit,For Sany Swing Motor Seal Kit,Hydraulic Pump Seal Kit For Sany,Hydraulic Pump Seal Kit Sany Safe Seal Technology Co., Ltd. , https://www.jsspreals.com
1. Preparation: Clean the working surface and seals, and check if the seals are damaged or deformed.
2. Apply lubricant: Apply a layer of lubricant to the seal and sealing groove.
3. Install the seal: Place the seal into the sealing groove, ensuring that the seal is fully embedded in the groove.
4. Install O-ring: Install the O-ring above the seal, ensuring that the O-ring is fully inserted into the groove.
5. Install the piston rod: Insert the piston rod into the seal and O-ring, ensuring that the piston rod fits tightly with the seal and O-ring.
6. Install the sealing sleeve: Place the sealing sleeve on the piston rod to ensure that it fits tightly with the piston rod.
7. Tighten the nut: Use the nut to fix the sealing sleeve on the hydraulic cylinder, ensuring that the sealing sleeve is secure.
8. Check the sealing effect: Operate the hydraulic cylinder and check if there is any leakage in the sealing element. If there is any leakage, reinstall the sealing element.