Iron sulfide ore (pyrite and pyrrhotite) is the main raw material Sulfuric Acid. Gold that is symbiotic with pyrite is not suitable for direct gold extraction by cyanidation. Usually, the pyrite sulfide concentrate obtained by flotation is first calcined and desulfurized at 700-850 ° C, and the produced SO 2 -containing flue gas is used for preparing sulfuric acid, and the calcined residue is used for lifting. gold. The main component of the slag is hematite and some magnetite. Generally, the slag contains 0.5~3g/t of gold. However, the particle size of the gold in the slag is very small, and the disaster is less than 0.01 mm, and most of them are packaged gold. It is difficult to achieve monomer separation of gold by a single grinding method. Only by calcination, water quenching and then grinding, can most of the gold be extracted by cyanidation. The process of recovering gold from pyrite cinder in the industry is shown in the figure below. The cyanide leaching rate of gold is 77%, the washing rate is 98%, the zinc substitution rate is 99.8%, and the total gold recovery rate is 71.6%. The obtained gold cyanide gold grade has a gold content of about 0.4%, and can be used as a raw material for one-step refined gold. Figure Recovery process from pyrite cinder
The equipment of fiber Two-For-One Twister, fancy twister and lapping yarn machine can wind different types of material into biconical and parallel bobbin in these machines, and provide yarn doubling function of regular materials.
Features:
1. Compact form, and easy maintenance;
2. SBC integrated control makes the interface more simple and intelligible;
3. Building-block structure design meets different consumers, which plays the furthest potential of the Silk Winder;
4. The ball screw which is manufactured according to the standard of German DIN and the bearing and frequency converter which are produced by advanced countries make the equipment run precisely and stably.
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