Introduction to flotation process

The amalgamation method was initiated at the beginning of the Qin and Han dynasties in China, and it is a major contribution of the Chinese alchemists to the world. Our alchemists were early adopters of amalgamation to extract gold and silver, the law later descendant of Western countries. Mercury amalgamation, the ancient method of recovering gold, has been replaced by cyanidation and flotation in some cases in modern metallurgy, but the natural gold (especially coarse) From the perspective of gold, there is still its uniqueness. Therefore, it is still one of the important methods for recycling gold at home and abroad.

The amalgamation method can be divided into internal mixed mercury and external mixed mercury according to its production mode. In the gold mines, the gold and heavy sand minerals are separated by the stick mercury method. In the vein gold mine, stick mercury is usually used as part of the joint process, and cooperates with flotation, I selection, and liquefaction, as an auxiliary means of the vein gold mine, mainly used to collect coarse monomer gold. Practice has proved that the use of amalgamation in the pulse gold beneficiation process to preferentially extract part of the gold (mostly coarse gold) can greatly reduce the loss of gold in the tailings.

The internal amalgamation is carried out in a mercury amalgamation tank or a grinding machine, which can better control the pollution of mercury. The main equipment for external amalgamation is a mercury-mixed plate, which is carried out in equipment other than crushed ore. For the selection of plants with amalgamation operations, the protection of mercury poisoning must be strictly carried out.

In the amalgamation operation, the current is applied to the cathode of the circuit connected to the surface of mercury, which can reduce the surface tension of mercury, activate the performance of mercury, and enhance the wetting ability of mercury to gold. Therefore, in recent years, the electric amalgamation method has been applied. In industrial production abroad.

Brake Valve

What to do if the foot brake valve of Liugong loader leaks?
The reason lies in the incomplete exhaust of the brake fluid and the Brake System (provided that there is no physical damage to the brake system) 50C loader adopts the pneumatic brake system of "air-over oil" (power booster) method, The front and rear axles are braked by pushing the pistons in the brake calipers by hydraulic oil. The brake system must be exhausted thoroughly before the whole machine leaves the factory. But after working continuously for a long time, the brake fluid in the Brake Caliper will produce bubbles. If these bubbles cannot be discharged smoothly, it will 100% cause the brake to fail, the brake is weak and weak. At the same time, after stepping on the brake, the brake fluid cup There will be bubbles coming out of it. The main reason is that the air brake system adopts the structure of brake caliper + brake disc to perform service braking. At the same time, the operating cycle of the loader is very short, and the loading and unloading cycle is as fast as tens of seconds. The temperature on the disc is very high. The temperature of 300 degrees Celsius is normal. When it is high, the temperature is 500-600 degrees Celsius. So you can see that the color of the brake disc sometimes turns blue, which is equivalent to quenching the brake disc at high temperature. The high temperature of the brake disc will be transferred to the brake fluid through heat radiation, so after a long time of work, the temperature of the brake fluid will gradually rise! ! So the question is, how high temperature can the general brake fluid withstand? 120? 150 degrees Celsius? This is absolutely related to the quality of the brake fluid.
Solution: The most thorough method is to use a hydraulic brake system and a wet bridge, but this is too expensive and unrealistic. Then it is to replace the good brake fluid and perform exhausting work thoroughly. This requires three people to work together at the same time, one stepping on the brake pedal, one filling the booster oil cup with brake fluid and observing the condition of the brake fluid cup, one standing Vent/exhaust next to the bridge until the brake is applied and the clear brake fluid is drained from the exhaust nozzle on the caliper.
SEM 50F, 650 Brake valve
Liugong loaders ZL50CN, 855N, 856 valve,
SDLG 956L 952H 953 Brake valve,
XCMG Brake valve LW500KL ZL50GN,
Komatsu WA380, WA380-3, WA380-5, WA430-5 Brake valve
DEGONG loader Brake valve
Foton Lovol Loader Brake valve
Lonking 855N loader Brake valve
XGMA 932 936 956 Loader Brake valve
Changlin Loader Brake valve
Shantui SL50W Brake valve

And we have more.