Yunnan In The Low-grade Scheelite At Room Temperature Flotation Technology Research

We directed against the resources of wolfram ore in the area of YUN NAN province, the purpose is adequate use the mineral resources, use the new technology and reagent to research if this area of wolfram ore has the value to be opened up and develop.In this experiment, the grade of the ore is only 0.38%, which is belonging to the ore of lower-grade. The company requests us the grade of the finished ore must higher than 60%, the recover must higher than 80%.Because of the scheelite's floatability is similar with the calcite and kelve, the scheelite is different to be celebrated. Russia and most of the concentrator in our country is used the hot flotation, but this way is complex to operate, the consumption of energy is very big, also has the high capital and the environment of the concentrator is very disappointing. So how to celebrate the scheelite and gangue mineral with calcium in the normal temperature is a target of the experts. In our experiment, our purpose is try to realize this target.In this experiment, we have taken three ways for celebrating the scheelite, so as:(1) only in gravimetric separation (2) flotation (3) combined work with gravity and flotation.Through with comparison, when the mesh-of-grind at 62.58%(below the 0.074millimeter), only work as gravity, the finished ore's grade is 34.67%, the recover is only 25.97%. So this way has given up. Combined work with gravity and flotation, we can received the finished ore as gravity and flotation, the grade and the recover are qualified, but the circuit is very complex, it is not easy to be controlled. Floatation, the circuit is simply, and easy to control, the most important is the indicator is very well, after six times concentration, we can receive the finished ore's grade at 63.17%, the recover at 86.32%.After the comparison with gravity,flotation and the combined work, we use the way with flotation at last. Based on many experiments, we have realized the way to celebrate the scheelite under the normal temperature with the new reagent and method.The reagent and circuit have been finalized, we considered reducing the waste, so we have taken many experiments on the waste water, and have proved that the waste water can be used again. In this way, we not only reduce the pollution near the concentrator, but also reduce the capital.