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The content of nickel in the crust is about0.02%, which is equivalent to two times of adding up copper, lead and zincthree metals, but integrated available for mining nickel deposit is not much.Due to the grade low of nickel mining from the ore, most nickel concentrate canbe used for smelting must be approved by dressing.Nickel is usually divided into threecategories: nickel sulfide ore, ore and nickel arsenide. The nickel arsenidecontaining nickel minerals is red nickel ore, arsenic nickel and bright arsenicnickel ore, etc, this kind of mineral only have a small amount of output in northAfrica Morocco, at present from nickel arsenide mention nickel is limited toindividual countries. The world nickel production about 70% come from nickelsulfide ore, 30% come from nickel oxide ore. In China, the proportion of nickelsulfide ore is more greater.Nickel is the last metal elements in theperiodic table of transition metal iron, by close oxygen turn to close sulfurslowly, so nickel and cobalt in nature is the main show in sulfide, haveadvantages in all of the nickel pyrrhotite, but in pyrite, the cobalt contentis higher. Nickel sulfide ore usually mainly contains copper which is always inthe form of chalcopyrite, so nickel sulphide ore often called copper and nickelsulphide ore, another sulphide ore containing cobalt and platinum group metal. Theaverage amount of copper and nickel sulfide ores containing nickel have greatchange. Copper and nickel sulphide ore can be classified into two categories:density lump ore and immersion disseminated spalling. From the point ofprocessing, this classification is convenient for all kinds of ore for the nexttreatment. Lean nickel immersion spalling direct close to beneficiationworkshop processing, and the density lump ore which contain high nickel power is directlysent to melting or by magnetic separation. The characteristic of copper andnickel sulphide ore is milk hard, difficult to break, and won’t burst when itis hot, its reason is that the sulfide ore is mainly magnetic pyrite.Nickel sulfide concentrate and coppersulfide nickel concentrate: at present, China's nickel mine mostly producecopper sulfide nickel mineral. The valuable metals, copper and nickel orecontaining quantity is very low, the change is great. This ore smelting directlyis energy dissipation, economic is not cost effective, so after the ore mined,it should be processed, a large number of gangue in ore dressing methods to getrid of impurity, and then get contains valence metal quantity of highconcentrate again into the metallurgical furnace to produce copper, and nickel andother metalpowder.For nickel quantity is greater than 7% ofcopper and nickel ore can be directly sent to smelt; Less than 3% needseparation enrichment. Disseminated spalling general with a priority orcomprehensive floating first and get nickel sulfide concentrate or coppersulfide nickel concentrate. Comprehensive flotation is suitable for processinghigh nickel quantity of ore and small-scale enterprises, then copper and nickelchosen together for copper and nickel concentrate, do not need to set up anothercopper factory to separate smelting copper concentrate.Lean ore dressing process consists of threesections of ball mill, two stage flotation. The second estimate, the secondsection of ball mill will ore grinding to 0.074 mm 60% after flotation, the frist time of roughing, a selectedfrom copper and nickel concentrate. A rougher tailings to grind - 0.074 mm 70% after into two stageflotation, the once selected, two times of scavenging, a selected to copper andnickel concentrate. Of scavenging foam then through two selected and to copperand nickel concentrate. Run of mine ore containing 0.5% nickel, copper andnickel concentrate containing nickel 3.5%, recovery rate 50%.A series of rich ore dressing processconsists of three sections of ball mill, two stage flotation. Will ore grindingto 0.074 mm 70% afterthe first paragraph flotation by one roughing, a selected copper and nickelconcentrate, roughing mill tailings again to 0.074 mm accounted for 80% of the second period offlotation, via a roughing and two times of cleaning to copper and nickelconcentrate. The second section roughing tailings then through roughing,scavenging and selected to sulfur concentrate. Run of mine ore containing 1.75%nickel, copper and nickel concentrate containing nickel 6.5% - 7.0%, therecovery is 89% - 90%. Source:http://www.mhcmp.com