Flotation is suitable for processing single coarse grained iron ore natural gold. The crushed ore enters the ball mill and is finely ground into a flotation. In the flotation, sodium carbonate is used as a regulator to float the gold. At the same time, the butyl xanthate and the amine black medicine are used as a supplement to separate the gold ore powder from the slag and produce gold concentrate powder. Amalgam flotation is suitable for treating natural gold inlays with coarser grain sizes and stored in pyrite and other sulfide ores. Different from single flotation, after the grinding, the mercury plate is added for gold recovery, and the recovery rate can reach 30-45%. The slurry after the amalgamation is floated by the overflow of the classifier. In order to produce mercury mercury better, adding a certain concentration of sodium carbonate, caustic soda, etc. during grinding can make the mercury recovery rate of 70%. Gravity beneficiation uses the difference in the ratio of gold to other minerals for flotation. The greater the difference in specific gravity, the easier it is to separate. The gold-bearing ore is placed in a cylindrical sieve, and the ore is flowed through high-pressure water. The gravel sand larger than the sieve hole is transported into the tailing mine through the slippery belt and the belt; the ore than the sieve hole is input into the 1-3 section through the male distributor. The jig is fed into the shaker through the 3-stage jig concentrate, and is coarse, fine, and sweeped to produce fine sand ore. This method is mostly used for quicksand mines, and finely divided ores are also applicable.
The charcoal method is the most advanced gold extraction method in the world in the 1980s. It is better used in the treatment of gold-bearing limonite oxidized ore. In 1983, China National Gold Corporation decided to transform the beneficiation process of Shaoguan Gold Mine, citing the new process of carbon extraction from the United States. The carbon slurry method performs adsorption of activated carbon while oxidizing and leaching to increase the leaching rate of gold. The process includes: two-stage closed-circuit crushing, two-stage grinding, and the overflow product of the trimmer--200 mesh accounts for 95%, and then enters the thickener, and the concentration of the slurry is concentrated from 18-20% to about 42-45%, and then The buffer tank enters the leaching adsorption tank for leaching operation, and is adsorbed by activated carbon made of coconut shell to obtain the final product carrying gold charcoal. The tailings are completely sieved with high frequency to recover the gold in the crushed activated carbon, and then the cyanide-containing tail liquid is treated with liquid chlorine. Gold recovery is obtained by analytical, electrolysis, pickling, and the like. The high-concentration cyanide and high alkalinity are analyzed, and the gold in the gold-loaded carbon is analyzed under high temperature and high pressure, and the deposited solution is sent to the electrolytic recovery. The electrolytic cell uses steel wool as the cathode and stainless steel as the anode to adsorb gold on the steel wool. The analyzed activated carbon is washed with hydrochloric acid, with calcium carbonate and other impurities, and finally regenerated in a rotary kiln returned to 600 °C. The process was analyzed in 1986-1987. The leaching rate in 1987 was 5.73 percentage points lower than the 1986 five-month average, which was 81.36%. And the leaching rate fluctuates greatly every month, most of you 33%, up to 98.4%. The reason is that the content of sulfide and copper in the mine has an increasing trend from domestic and foreign tests in January and May of 1984. The increase of silver , aluminum and copper is also significant, affecting the leaching of the carbon slurry process. effect. Therefore, in 1987, a flotation process was reformed to treat some of the copper-bearing sulphide ore by flotation, which not only utilized the original flotation series of idle equipment, but also ensured the leaching rate of the carbon slurry method.
After smelting process for producing a variety of mineral ore powder of gold, silver, and an oxidizing agent is added KNO3 and borax. When the temperature of the furnace rises to 700 °C, the hair gold melts, the temperature of the furnace rises to 1000 °C, the melt begins to boil, the slag liquid floats, and the incandescent bright gold sinks calmly. When the furnace temperature is warmed to 1250 ° C -1350 At °C, the surface brightness of the slag liquid becomes dark, and the slag liquid is removed several times to produce pure gold. The overall process is to oxidize and remove compounds such as excess sulfur in the melt by melting. Electrolytic direct smelting This method is adopted by Shaoguan Gold Mine, which directly smelts gold and silver gold with steel wool as the cathode. Due to the original gold obtained by this method, gold and silver are not easy to separate. Silver is not priced when it is sold, and steel wool is mixed with slag at a time, and the cost is too high. Now it is changed to washed electrolytic steel wool, which has gold and silver mud. The general grade is 22-28% gold, 15-20% silver. When gold and silver are separated, silver, copper, iron and other slag enter the solution, while gold does not. Dissolved, present in a reddish brown state, and then the gold mud is washed, dried and smelted together with the solvent.
1.The reaming tools include three-cones reamer, single - cone reamer, Rigid Reamer, etc. All the products possess the advantages of reliable performance, easy operation , etc.
2.A reaming tool has a shaft and a shaped head with at least one cutter. The shaped head is produced from a blank having a base body of a base material on its envelope surface with at least one rectilinear or helical groove-shaped recess running around it, into which high hardness cutting material is sintered.
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