Copper mine selection includes roughing, choiceness and scavenging of ore grinding, grading, size mixing and flotation. There has a grinding-flotation process. Segmented grinding - flotation stage of float grinding process.Secondary grinding and selection to concentrates or middling process.Work of flotation output the crude concentrates is called roughing. Secondary work to rough and concentrate mine is called extractive selection. Secondary work to the tailing is called scavenger selection. Process of different minerals flotation is called preferential flotation or selective flotation when recycling the multifarious useful mine in the ore. Process of useful minerals surfaced and separation is called mixed-flotation separation. Industrial production must contrapose the nature of the ore and requirement to the production to use different prescription and flotation process. Copper mine selection equipment and copper mineral processing equipment in the copper flotation sulfide copper minerals use xanthate, terpenic oil and lime to flotation and isolate with gangue and the symbiotic iron sulfide minerals. We use Preferential flotation mostly. Oxidized copper is generally coupled with xanthate flotation using sodium sulfide activation or use fatty acid directly as flotation collector. When election copper devices and copper mineral processing equipment / election copper powder production line of flotation use sulfide copper-nickel ore, it always uses the flotation of sulfide copper minerals collector and the foaming agent. A basic principle of flotation process confirmation is prefer to make the copper into the nickel concentrate to avoid nickel entering into the copper concentrate as much as possible. The loss of nickel in the copper concentrate smelting process is huge, while copper in the nickel concentrate can get a complete recovery. Copper-nickel ore flotation has the following four basic processes:
1. Use the preferential flotation or part preferential flotation process. When the copper is much more than the nickel in the ore, this process can be used to select the copper into separate concentrates. The advantages of the process is to get the copper concentrate directly of lower nickel. 2. The mixing flotation process. For sorting the ore of less copper than nickel, the mixed concentrate of copper-nickel smelts into nickel matte directly. 3. Mixing-preferential flotation process. Mixing flotation selection of nickel from ore, elected from the mixed concentrates carved with low nickel copper concentrate and copper nickel concentrates. The smelted nickel concentrates gets the nickel matte, and make flotation separation to the nickel matte. 4. Mixing - preferential flotation process recover part of the nickel from the flotation tailings.
When the floating of various nickel minerals in the ore exist big difference, it recycles the floatability nickel-containing minerals from its tailings after copper-nickel flotation. A copper mine is not only rich in copper, but also gold and synthesizable mineral of iron, sulfur and rare earth, copper equipment / copper slag election equipment use part priority - mixed broken flotation, copper slipping of tailing desulfurization flotation and selection of iron ore tailings re-election technological process, when PH=8-9, it takes efficient capture collector AP and frother BK-201, follow the Wong Yiu-flotation similarly in the mixed election operations butyl, and the proceeds of copper gilt ore gets milled (ball mill)to copper concentrate, and concentrate selected from rough concentrate with the method of differential flotation making the final copper concentrante, which accounts for 26.07%, containing gold 6.56 g/t. Wherein the copper recovery is 94.07%. Gold recovery of copper concentrante is 65.54%. The sulphury grade of sulphur concentrate is generally in 35.21%, which also can get the iron concentrate with grade at 68.78%, sulfur grade at 0.20%, recovery at 46.50% ,and rare- earth ore of TRO10.22%. A complicated ore of high arsenic, alumina use the copper mine selection equipment /copper ore selection equipment / copper powder selection production line, using the stage grinding, crude and concentrates regrinding, fine tailings regrinding and re-election process, take sodium sulfide as a precipitant sodium sulfide and ammonium chloride group to contempt of inhibitors, and absorb the separation of copper successfully, and achieve a good sorting index. Copper usually contains dirt, a lot of clay, as well as variety of non-copper minerals. The first step is to eliminate this scrap which is called concentration, and is usually proceeded by flotation method. 1. Most of the sulfide ore comes from the huge open pit blasting mine and drilling mining. To this mine, remove the cover layer at the surface of the ore first to expose the buried deposits, then comes the miles of open pit mine. 2. The naked ores are dug up by a large excavator, and hauled by the dump trucks to a storage of 500-900 cubic feet. 3. The ore are extruded in the cone crusher and broken into small pieces. 4. The broken ores are sent to rolling machine to mill into smaller particle size of mineral particles. Firstly, mixed with water in a rod mill, the stell balls and mineral particles hit each other and grind. As the horizontal axis cylinder rotation, the steel bars of the mineral particles break down into lumps of about 0.13 (3 mm) diameter. The ore and water mixture gets further grinded by two rolling machines. The fine grinding of ore, mud from the last mill is about 0.01 particle diameter (0.25 mm). 5. Mud is mixed with variety of chemical reagents and copper particles. Add the foaming agent in the liquid at meanwhile. Pine oil or alcohol are often used as a foaming agent. This mixture float in the cell of flotation machine. The air enters into the slurry injected through the bottom. Copper particles attache to the bubble rising to the surface of the slurry. The foaming agent forms a thick layer of foam to overflow the flotation cell, and collected. The bubbles are allowed in order to condensed water discharge. The resulting mixture, known as copper concentrate, containing about 25% - 35% of the copper, small concentrations of sulfide and a variety of copper, iron, gold, silver and other materials. The remaining material is called gangue or tailings in the flotation cell and pumped into the sedimentation tank to make it dry.
Series composed by a single slot or multiple slots stirring inflatable flotation pulp, the adhesion of air bubbles and mineral particles, bubbles rise and form a foam layer is scraped or overflow out in a flotation tank. According to different mixing and inflatable ways, it can divide into 5 kinds, firstly is mechanical agitation type, stirred and aerated by a mechanical stirrer. There has the tapes of centrifugal impeller, star-shaped rotor and bar rotor. Of high-speed rotation of the agitator in a flotation tank, drive the slurry flow and the negative pressure air inhaled in the impeller cavity. The second is the inflatable mechanical agitation. Fill the low pressure air into the flotation cell again besides the mechanical agitation. The third is the inflatable type. Press into the air to stir and produce bubbles, such as column flotation and foam separation unit etc. The fourth is gas precipitation type. Use the pressure reducing method or the method of raising pressure first, then low down to atmospheric pressure, separate out the dissolved air in the slurry, and form the microbubbles. The fifth is pressure of dissolved gas type. Fill the air into the pre-dissolved in water high pressure, separate out in the flotation tank at the atmospheric pressure, and form plenty microbubbles.